Patent Publication Number: US-2023161135-A1

Title: Imaging lens system

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims the benefit under 35 USC 119(a) of Korean Patent Application No. 10-2021-0164503 filed on Nov. 25, 2021, in the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes. 
     BACKGROUND 
     1. Field 
     Embodiments of the present disclosure relate to an imaging lens system. For example, embodiments of the present disclosure relate to an imaging lens system mountable on a rear camera of a vehicle and a camera for autonomous driving of a vehicle. 
     2. Description of the Background 
     Vehicles may include a camera to reduce damage to persons and property caused by traffic accidents. For example, one or more cameras may be installed on front and rear bumpers of a vehicle to provide a driver with information on objects located to the front and rear of the vehicle. A vehicle camera may require high-resolution performance as it is important for a vehicle camera to recognize objects around a vehicle and to provide the recognized information to a driver. However, it may be difficult for a vehicle camera to implement high resolution due to limitations in an installation location. For example, to implement a vehicle camera having a certain f number, it may be necessary to increase diameters of a front lens and other lenses, but due to structural and design limitations of vehicle components (e.g., a bumper) on which a camera is installed, it may be difficult to arbitrarily change sizes of the lenses. 
     The above information is presented as background information only to assist with an understanding of the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with regard to the disclosure. 
     SUMMARY 
     This Summary is provided to introduce a selection of concepts in simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter. 
     In one general aspect, an imaging lens system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens disposed in order from an object side, wherein the imaging lens system satisfies conditional expressions of 0.23 mm/°&lt;D1/HFOV&lt;0.35 mm/° and 0.15&lt;ImgH/TTL&lt;0.20, where D1 is an effective diameter of the first lens, HFOV is a field of view of the imaging plane in a horizontal direction, ImgH is a height of the imaging plane, and TTL is a distance from an object-side surface of the first lens to the imaging plane. 
     The first lens may have a concave image-side surface. 
     The third lens may have a convex object-side surface. 
     The fourth lens may have a convex object-side surface. 
     The fifth lens may have a concave object-side surface. 
     The sixth lens may have positive refractive power. 
     The imaging lens system may satisfy a conditional expression of 2.5&lt;TTL/f&lt;3.2, where f is a focal length of the imaging lens system. 
     The imaging lens system may satisfy a conditional expression of 0.6&lt;|f/f3|&lt;1.6, where f is a focal length of the imaging lens system and f3 is a focal length of the third lens. 
     The imaging lens system may satisfy a conditional expression of 0.3&lt;D1/TTL&lt;0.6. 
     The imaging lens system may satisfy a conditional expression of f2/f3&lt;0, where f2 is a focal length of the second lens and f3 is a focal length of the third lens. 
     The imaging lens system may satisfy a conditional expression of f4/f5&lt;0, where f4 is a focal length of the fourth lens and f5 is a focal length of the fifth lens. 
     In another general aspect, an imaging lens system includes a first lens having a concave image-side surface, a second lens having refractive power, a third lens having positive refractive power and having a convex image-side surface, a fourth lens having refractive power, a fifth lens having refractive power, and a sixth lens having refractive power, wherein the first to sixth lenses are disposed in order from the object side, and wherein the imaging lens system satisfies a conditional expression of 2.5&lt;TTL/f&lt;3.2, where f is a focal length of the imaging lens system and TTL is a distance from an object-side surface of the first lens to an imaging plane. 
     The imaging lens system may satisfy a conditional expression of −2.4&lt;f2/f3&lt;−0.6, where f2 is a focal length of the second lens and f3 is a focal length of the third lens. 
     The imaging lens system may satisfy a conditional expression of −1.6&lt;f4/f5&lt;−0.8, where f4 is a focal length of the fourth lens and f5 is a focal length of the fifth lens. 
     The imaging lens system may satisfy a conditional expression of 1.6&lt;f number&lt;2.1. 
     The imaging lens system may satisfy a conditional expression of 0.4&lt;ImgH/f&lt;0.6, where ImgH is a height of the imaging plane. 
     In another general aspect, an imaging lens system includes a first lens having a concave image-side surface, a second lens having refractive power, a third lens having positive refractive power and having a convex image-side surface, a fourth lens having refractive power, a fifth lens having refractive power, and a sixth lens having refractive power, wherein the first to sixth lenses are disposed in order from the object side, and wherein the imaging lens system satisfies a conditional expression of 0.23 mm/°&lt;D1/HFOV&lt;0.35 mm/°, where D1 is an effective diameter of the first lens and HFOV is a field of view of an imaging plane in a horizontal direction. 
     The imaging lens system may satisfy a conditional expression of 0.15&lt;ImgH/TTL&lt;0.20, where ImgH is a height of the imaging plane and TTL is a distance from an object-side surface of the first lens to the imaging plane. 
     The imaging lens system may satisfy a conditional expression of 2.5&lt;TTL/f&lt;3.2, where f is a focal length of the imaging lens system and TTL is a distance from an object-side surface of the first lens to an imaging plane. 
     Other features and aspects will be apparent from the following detailed description, the drawings, and the claims. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG.  1    is a diagram illustrating an imaging lens system according to a first embodiment of the present disclosure. 
         FIG.  2    presents aberration curves of the imaging lens system illustrated in  FIG.  1   . 
         FIG.  3    is a diagram illustrating an imaging lens system according to a second embodiment of the present disclosure. 
         FIG.  4    presents aberration curves of the imaging lens system illustrated in  FIG.  3   . 
         FIG.  5    is a diagram illustrating an imaging lens system according to a third embodiment of the present disclosure. 
         FIG.  6    presents aberration curves of the imaging lens system illustrated in  FIG.  5   . 
         FIG.  7    is a diagram illustrating an imaging lens system according to a fourth embodiment of the present disclosure. 
         FIG.  8    presents aberration curves of the imaging lens system illustrated in  FIG.  7   . 
         FIG.  9    is a diagram illustrating an imaging lens system according to a fifth embodiment of the present disclosure. 
         FIG.  10    presents aberration curves of the imaging lens system illustrated in  FIG.  9   . 
         FIG.  11    is a diagram illustrating an imaging lens system according to a sixth embodiment of the present disclosure. 
         FIG.  12    presents aberration curves of the imaging lens system illustrated in  FIG.  11   . 
         FIG.  13    is a diagram illustrating an imaging lens system according to a seventh embodiment of the present disclosure. 
         FIG.  14    presents aberration curves of the imaging lens system illustrated in  FIG.  13   . 
         FIG.  15    is a diagram illustrating an imaging lens system according to an eighth embodiment of the present disclosure. 
         FIG.  16    presents aberration curves of the imaging lens system illustrated in  FIG.  15   . 
         FIG.  17    is a diagram illustrating an imaging lens system according to a ninth embodiment of the present disclosure. 
         FIG.  18    presents aberration curves of the imaging lens system illustrated in  FIG.  17   . 
         FIG.  19    is a diagram illustrating an imaging lens system according to a tenth embodiment of the present disclosure. 
         FIG.  20    presents aberration curves of the imaging lens system illustrated in  FIG.  19   . 
     
    
    
     Throughout the drawings and the detailed description, the same reference numerals refer to the same elements. The drawings may not be to scale, and the relative sizes, proportions, and depictions of elements in the drawings may be exaggerated for clarity, illustration, and convenience. 
     DETAILED DESCRIPTION 
     Hereinafter, while example embodiments of the present disclosure are described in detail with reference to the accompanying illustrative drawings, it is noted that examples are not limited to the same. 
     The following detailed description is provided to assist the reader in gaining a comprehensive understanding of the methods, apparatuses, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatuses, and/or systems described herein will be apparent after an understanding of this disclosure. For example, the sequences of operations described herein are merely examples, and are not limited to those set forth herein, but may be changed as will be apparent after an understanding of this disclosure, with the exception of operations necessarily occurring in a certain order. Also, descriptions of features that are known in the art may be omitted for increased clarity and conciseness. 
     The features described herein may be embodied in different forms, and are not to be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways of implementing the methods, apparatuses, and/or systems described herein that will be apparent after an understanding of this disclosure. 
     Throughout the specification, when an element, such as a layer, region, or substrate, is described as being “on,” “connected to,” or “coupled to” another element, it may be directly “on,” “connected to,” or “coupled to” the other element, or there may be one or more other elements intervening therebetween. In contrast, when an element is described as being “directly on,” “directly connected to,” or “directly coupled to” another element, there may be no other elements intervening therebetween. 
     As used herein, the term “and/or” includes any one and any combination of any two or more of the associated listed items; likewise, “at least one of” includes any one and any combination of any two or more of the associated listed items. 
     Although terms such as “first,” “second,” and “third” may be used herein to describe various members, components, regions, layers, or sections, these members, components, regions, layers, or sections are not to be limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or section from another member, component, region, layer, or section. Thus, a first member, component, region, layer, or section referred to in examples described herein may also be referred to as a second member, component, region, layer, or section without departing from the teachings of the examples. 
     Spatially relative terms, such as “above,” “upper,” “below,” “lower,” and the like, may be used herein for ease of description to describe one element&#39;s relationship to another element as shown in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as being “above,” or “upper” relative to another element would then be “below,” or “lower” relative to the other element. Thus, the term “above” encompasses both the above and below orientations depending on the spatial orientation of the device. The device may also be oriented in other ways (rotated 90 degrees or at other orientations), and the spatially relative terms used herein are to be interpreted accordingly. 
     The terminology used herein is for describing various examples only, and is not to be used to limit the disclosure. The articles “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms “comprises,” “includes,” and “has” specify the presence of stated features, numbers, operations, members, elements, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, members, elements, and/or combinations thereof. 
     Due to manufacturing techniques and/or tolerances, variations of the shapes shown in the drawings may occur. Thus, the examples described herein are not limited to the specific shapes shown in the drawings, but include changes in shape that occur during manufacturing. 
     Herein, it is noted that use of the term “may” with respect to an example, for example, as to what an example may include or implement, means that at least one example exists in which such a feature is included or implemented while all examples are not limited thereto. 
     The features of the examples described herein may be combined in various ways as will be apparent after an understanding of this disclosure. Further, although the examples described herein have a variety of configurations, other configurations are possible as will be apparent after an understanding of this disclosure. 
     An embodiment of the present disclosure is to provide an imaging lens system which may reduce changes in sizes of lenses and may implement high resolution. 
     In the embodiments, a first lens refers to a lens most adjacent to an object (or a subject), and a sixth lens refers to a lens most adjacent to an imaging plane (or an image sensor). In the embodiments, a unit of a radius of curvature, a thickness, a TTL (a distance from an object-side surface of the first lens to an imaging plane), an ImgH (a height of an imaging plane), a focal length, and an effective diameter are indicated in millimeters (mm). 
     A thickness of a lens, a gap between lenses, and a TTL refer to a distance of a lens in an optical axis. Also, in the descriptions of a shape of a lens, the configuration in which one surface is convex indicates that a paraxial region of the surface is convex, and the configuration in which one surface is concave indicates that a paraxial region of the surface is concave. Thus, even when it is described that one surface of a lens is convex, an edge of the lens may be concave. Similarly, even when it is described that one surface of a lens is concave, an edge of the lens may be convex. 
     The imaging lens system described in embodiments may be configured to be mounted on a transport device. For example, the imaging lens system may be mounted on a front and rear surveillance camera or an autonomous driving camera mounted on a passenger car, a truck, a fire truck, a forklift, and the like. However, the embodiments of the imaging lens system are not limited to the above-described examples. For example, the imaging lens system may be mounted on an imaging camera of a surveillance drone or a transport drone. 
     The imaging lens system according to the first embodiment may include a plurality of lenses. For example, the imaging lens system may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens disposed in order from an object side. 
     The imaging lens system in the first embodiment may satisfy a specific conditional expression. For example, the imaging lens system in the first embodiment may satisfy a conditional expression of 0.23 mm/°&lt;D1/HFOV&lt;0.35 mm/° with respect to an effective diameter D1 of the first lens and a field of view HFOV of the imaging plane in the horizontal direction. Also, the imaging lens system in the first embodiment may satisfy a conditional expression of 0.15&lt;ImgH/TTL&lt;0.20 with respect to a height ImgH of the imaging plane and a TTL. 
     An imaging lens system according to a second embodiment may include a plurality of lenses. For example, the imaging lens system may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens disposed in order from an object side. 
     The imaging lens system in the second embodiment may include a lens having a predetermined shape. For example, the imaging lens system according to the second embodiment may include a first lens having a concave image-side surface and a third lens having a convex image-side surface. Also, the imaging lens system according to the second embodiment may include a lens having predetermined refractive power. For example, the imaging lens system according to the second embodiment may include a third lens having positive refractive power. 
     The imaging lens system according to the second embodiment may satisfy a specific conditional expression. For example, the imaging lens system according to the second embodiment may satisfy the conditional expression 2.5&lt;TTL/f&lt;3.2 with respect to a TTL and a focal length f of the imaging lens system. 
     The imaging lens system according to the third embodiment may be configured to satisfy one or more conditional expressions. As an example, the imaging lens system according to the third embodiment may include six lenses, and may satisfy two or more conditional expressions. As another example, the imaging lens system according to the third embodiment may include six lens, and may be configured to satisfy overall conditional expressions as below: 
       2.5&lt; TTL/f&lt; 3.2 
       0.6&lt;| f/f 3|&lt;1.6 
       0.3&lt; D 1/ TTL&lt; 0.6 
         f 2/ f 3&lt;0 
         f 4/ f 5&lt;0 
       55°&lt;DFOV&lt;61°
 
       5.0°/ mm &lt;DFOV/ f&lt; 6.0°/ mm  
 
       25  mm&lt;|f 45|&lt;70 mm    
     In the conditional expressions above, TTL is a distance from an object-side surface of the first lens to the imaging plane, f is a focal length of the imaging lens system, f2 is a focal length of the second lens, f3 is a focal length of the third lens, f5 is a focal length of the fifth lens, DFOV is a field of view of the imaging plane in the diagonal direction, and f45 is a combined focal length of the fourth and fifth lenses. Furthermore, f1 is a focal length of the first lens and f6 is a focal length of the sixth lens. 
     The imaging lens system may satisfy a portion of the aforementioned conditional expressions in a further limited manner as below: 
       −2.4&lt; f 2/ f 3&lt;−0.6
 
       −1.6&lt; f 4/ f 5&lt;−0.8
 
     An imaging lens system according to the fourth embodiment may be configured to satisfy one or more conditional expressions. For example, the imaging lens system according to the fourth embodiment may include six lenses, and may satisfy two or more conditional expressions. As another example, the imaging lens system according to the fourth embodiment may include six lenses, and may be configured to satisfy overall conditional expressions as below: 
       1.6&lt; f  number&lt;2.1 
       0.4&lt;ImgH/ f&lt; 0.6 
       −0.6&lt;( R   5 + R   6 )/( R   5 − R   6 )&lt;0.4
 
       −0.5&lt;( R   2 + R   6 )/( R   2 - R   6 )&lt;0.6
 
       1.70&lt;( Nd   1 + Nd   3 )/2&lt;1.90 
       1.60&lt;( Nd   1 + Nd   3 + Nd   5 )/3&lt;1.90 
       40&lt;( V   1 + V   2 + V   3 + V   4 )/4&lt;46 
       40&lt;SumV/6&lt;50 
       1.62&lt;SumNd/6&lt;1.82 
       0.24&lt; D   12 / D   23 &lt; 0 . 76   
     In the conditional expression above, ImgH is a height of the imaging plane, R2 is a radius of curvature of an image-side surface of the first lens, R5 is a radius of curvature of an object-side surface of the third lens, R6 is a radius of curvature of an image-side surface of the third lens, Nd 1  is a refractive index of the first lens, Nd 3  is a refractive index of the third lens, Nd 5  is a refractive index of the fifth lens, V1 is an Abbe number of the first lens, V2 is an Abbe number of the second lens, V3 is an Abbe number of the third lens, V4 is an Abbe number of the fourth lens, SumV is a sum of Abbe numbers of the first to sixth lenses, SumNd is a sum of the refractive indices of the first to sixth lenses, D12 is a distance from the image-side surface of the first lens to the object-side surface of the second lens, and D23 is a distance from the image-side surface of the second lens to the object-side surface of the third lens. 
     The imaging lens system in the embodiments may include one or more lenses having properties as below, if desired. For example, the imaging lens system according to the first embodiment may include one of the first to sixth lenses according to properties as below. As another example, the imaging lens system according to the second to fourth embodiments may include one or more of the first to sixth lenses according to properties as below. However, the imaging lens system in the aforementioned embodiments does not necessarily include the lens according to the properties as below. Hereinafter, properties of the first to sixth lenses will be described. 
     The first lens may have refractive power. For example, the first lens may have positive or negative refractive power. One surface of the first lens may be concave. For example, the first lens may have a concave image-side surface. The first lens may include a spherical surface or an aspherical surface. For example, both surfaces of the first lens may be spherical. As another example, both surfaces of the first lens may be aspherical. For reference, both surfaces of the first lens may be aspherical only when both surfaces of the second lens are spherical. The first lens may be formed of a material having high light transmissivity and excellent workability. For example, the first lens may be formed of a plastic material or a glass material. The first lens may be configured to have a predetermined refractive index. For example, the refractive index of the first lens may be greater than 1.7. As a specific example, the refractive index of the first lens may be greater than 1.70 and less than 1.79. However, the refractive index of the first lens is not limited to the aforementioned range. For example, the first lens may have a refractive index less than 1.7 only when the refractive index of the second lens is greater than 1.7. The first lens may have a predetermined Abbe number. For example, the Abbe number of the first lens may be 40 or more. As a specific example, the Abbe number of the first lens may be greater than 40 and less than 80. 
     The second lens may have refractive power. For example, the second lens may have positive or negative refractive power. One surface of the second lens be concave. For example, the second lens may have a concave object-side surface or a concave image-side surface. The second lens may include a spherical surface or an aspherical surface. For example, both surfaces of the second lens may be aspherical. As another example, both surfaces of the second lens may be spherical. The second lens may be formed of a material having high light transmissivity and excellent workability. For example, the second lens may be formed of a plastic material or a glass material. The second lens may be configured to have a predetermined refractive index. For example, the refractive index of the second lens may be greater than 1.5. As a specific example, the refractive index of the second lens may be greater than 1.5 and less than 1.9. The second lens may have a predetermined Abbe number. For example, the Abbe number of the second lens may be 30 or more. As a specific example, the Abbe number of the second lens may be greater than 30 and less than 50. 
     The third lens may have refractive power. For example, the third lens may have positive refractive power. One surface of the third lens may be convex. For example, the third lens may have a convex object-side surface or a convex image-side surface. As another example, the third lens may have a convex object-side surface and a convex image-side surface. The third lens may include a spherical surface or an aspherical surface. For example, both surfaces of the third lens may be aspherical. The third lens may be formed of a material having high light transmissivity and excellent workability. For example, the third lens may be formed of a plastic material or a glass material. The third lens may be configured to have a predetermined refractive index. For example, the refractive index of the third lens may be greater than 1.7 and less than 1.9. However, the refractive index of the third lens may not satisfy the aforementioned numerical range only when the refractive index of the first lens is less than 1.6. The third lens may have a predetermined Abbe number. For example, the Abbe number of the third lens may be greater than 30 and less than 70. 
     The fourth lens may have refractive power. For example, the fourth lens may have positive or negative refractive power. Both surfaces of the fourth lens may be symmetrical. For example, both surfaces of the fourth lens may be convex or concave. The fourth lens may include a spherical surface. For example, both surfaces of the fourth lens may be spherical. The fourth lens may be formed of a material having high light transmissivity and excellent workability. For example, the fourth lens may be formed of a plastic material or a glass material. The fourth lens may be configured to have a predetermined refractive index. For example, the refractive index of the fourth lens may be greater than 1.67 and less than 1.89. The fourth lens may have a predetermined Abbe number. For example, the Abbe number of the fourth lens may be greater than 20 and less than 56. 
     The fifth lens may have refractive power. For example, the fifth lens may have positive or negative refractive power. Both surfaces of the fifth lens may be symmetrical. For example, both surfaces of the fifth lens may be convex or concave. The fifth lens may include a spherical surface. For example, both surfaces of the fifth lens may be spherical. The fifth lens may be formed of a material having high light transmissivity and excellent workability. For example, the fifth lens may be formed of a plastic material or a glass material. The fifth lens may be configured to have a predetermined refractive index. For example, the refractive index of the fifth lens may be greater than 1.7. As a specific example, the refractive index of the fifth lens may be greater than 1.70 and less than 1.89. The fifth lens may have a predetermined Abbe number. For example, the Abbe number of the fifth lens may be less than 50. As a specific example, the Abbe number of the fifth lens may be greater than 20 and less than 50. 
     The sixth lens may have refractive power. For example, the sixth lens may have positive or negative refractive power. One surface of the sixth lens may convex or concave. For example, the sixth lens may have a convex object-side surface or a convex image-side surface. As another example, the sixth lens may have a concave object-side surface or a concave image-side surface. The sixth lens may include an aspherical surface. For example, both surfaces of the sixth lens may be aspherical. The sixth lens may be formed of a material having high light transmissivity and excellent workability. For example, the sixth lens may be formed of a plastic material or a glass material. The sixth lens may be configured to have a predetermined refractive index. For example, the refractive index of the sixth lens may be greater than 1.50 and less than 1.70. The sixth lens may have a predetermined Abbe number. For example, the Abbe number of the sixth lens may be greater than 40 and less than 70. 
     The first to sixth lenses may include a spherical surface or an aspherical surface as described above. When the first to sixth lenses include an aspherical surface, the aspherical surface of the corresponding lens may be represented by equation 1. 
     
       
         
           
             
               
                 
                   Z 
                   = 
                   
                     
                       
                         cr 
                         2 
                       
                       
                         1 
                         + 
                         
                           
                             1 
                             - 
                             
                               
                                 ( 
                                 
                                   1 
                                   + 
                                   k 
                                 
                                 ) 
                               
                               ⁢ 
                               
                                 c 
                                 2 
                               
                               ⁢ 
                               
                                 r 
                                 2 
                               
                             
                           
                         
                       
                     
                     + 
                     
                       Ar 
                       4 
                     
                     + 
                     
                       Br 
                       6 
                     
                     + 
                     
                       Cr 
                       8 
                     
                     + 
                     
                       Dr 
                       10 
                     
                     + 
                     
                       Er 
                       12 
                     
                     + 
                     
                       Fr 
                       14 
                     
                     + 
                     
                       Gr 
                       16 
                     
                     + 
                     
                       Hr 
                       18 
                     
                     + 
                     
                       Jr 
                       20 
                     
                   
                 
               
               
                 
                   Equation 
                   ⁢ 
                       
                   1 
                 
               
             
           
         
       
     
     In equation 1, c is a reciprocal of a radius of curvature of the corresponding lens, k is a conic constant, r is a distance from an arbitrary point on the aspherical surface to an optical axis, A to H and J are aspherical constants, and Z (or SAG) is a height from an arbitrary point on the aspherical surface to an apex of the aspherical surface in the optical axis direction. 
     The imaging lens system according to the above-described embodiment may further include a stop, a filter, and a cover glass. As an example, the imaging lens system may further include a stop disposed between the second lens and the third lens or between the third lens and the fourth lens. As another example, the imaging lens system may further include a filter and a cover glass disposed between the sixth lens and the imaging plane. The stop may be configured to adjust the amount of light incident in the direction of the imaging plane. The filter may be configured to block light within a specific wavelength, and the cover glass may be configured to block foreign substances, and the like, entering in the direction of the imaging plane. For reference, the filter described in the embodiments may be configured to block infrared rays, but may be configured to block ultraviolet rays if desired. 
     Hereinafter, a specific embodiment of an imaging lens system will be described with reference to the drawings. 
     An imaging lens system according to a first embodiment will be described with reference to  FIG.  1   . 
     The imaging lens system  100  may include a first lens  110 , a second lens  120 , a third lens  130 , a fourth lens  140 , a fifth lens  150 , and a sixth lens  160 . 
     The first lens  110  may have positive refractive power, and may have a convex object-side surface and a concave image-side surface. The second lens  120  may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The third lens  130  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fourth lens  140  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fifth lens  150  may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The sixth lens  160  may have positive refractive power, and may have a convex object-side surface and a concave image-side surface. An inflection point may be formed on the object-side surface and the image-side surface of the sixth lens  160 . In the embodiment, the fourth lens  140  and the fifth lens  150  may be bonded to each other. In greater detail, a radius of curvature of the image-side surface of the fourth lens  140  and a radius of curvature of the object-side surface of the fifth lens  150  may be configured to be the same, and an air gap between the image-side surface of the fourth lens  140  and the object-side surface of the fifth lens  150  may be substantially approximate to zero. 
     The imaging lens system  100  may further include a stop ST, a filter IF, a cover glass CG, and an imaging plane IP. The stop ST may be disposed between the third lens  130  and the fourth lens  140 , and the filter IF and the cover glass CG may be disposed between the sixth lens  160  and the imaging plane IP. The imaging plane IP may be formed in a position in which light incident by the first lens  110  to the sixth lens  160  is formed. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or within the image sensor IS. 
     Tables 1 and 2 list the lens properties and aspherical values of the imaging lens system according to the embodiment, and  FIG.  2    presents aberration curves of the imaging lens system according to the embodiment. 
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 1 
               
               
                   
               
               
                   
                   
                 Radius of 
                 Thickness/ 
                 Refractive 
                 Abbe 
                 Effective 
               
               
                 Surface No. 
                 Component 
                 Curvature 
                 Distance 
                 Index 
                 Number 
                 Diameter 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S1 
                 First Lens 
                 11.920 
                 1.550 
                 1.776 
                 49.6 
                 6.037 
               
               
                 S2 
                   
                 22.510 
                 1.902 
                   
                   
                 5.670 
               
               
                 S3 
                 Second Lens 
                 −13.228 
                 0.600 
                 1.582 
                 41.5 
                 5.557 
               
               
                 S4 
                   
                 6.264 
                 3.693 
                   
                   
                 4.626 
               
               
                 S5 
                 Third Lens 
                 12.284 
                 4.730 
                 1.888 
                 40.8 
                 4.801 
               
               
                 S6 
                   
                 −20.663 
                 0.100 
                   
                   
                 4.260 
               
               
                 S7 
                 Stop 
                 Infinity 
                 0.760 
                   
                   
                 3.931 
               
               
                 S8 
                 Fourth Lens 
                 9.489 
                 3.515 
                 1.707 
                 48.8 
                 4.170 
               
               
                 S9 
                 Fifth Lens 
                 −6.589 
                 1.147 
                 1.813 
                 24.1 
                 4.026 
               
               
                 S10 
                   
                 21.003 
                 4.187 
                   
                   
                 3.838 
               
               
                 S11 
                 Sixth Lens 
                 49.705 
                 3.500 
                 1.579 
                 62.0 
                 3.935 
               
               
                 S12 
                   
                 6433.696 
                 0.520 
                   
                   
                 5.098 
               
               
                 S13 
                 Filter 
                 Infinity 
                 0.400 
                 1.519 
                 64.2 
                 5.240 
               
               
                 S14 
                   
                 Infinity 
                 0.562 
                   
                   
                 5.260 
               
               
                 S15 
                 Cover Glass 
                 Infinity 
                 0.400 
                 1.519 
                 64.2 
                 5.301 
               
               
                 S16 
                   
                 Infinity 
                 0.435 
                   
                   
                 5.321 
               
               
                 S17 
                 Imaging Plane 
                 Infinity 
                 0.000 
                   
                   
                 5.353 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
             
               
                 TABLE 2 
               
               
                   
               
               
                 Surface 
                   
                   
                   
                   
               
               
                 No. 
                 S3 
                 S4 
                 S11 
                 S12 
               
               
                   
               
             
            
               
                 K 
                 5.442806E−01 
                 −1.567027E+00 
                  0.000000E+00 
                  0.000000E+00 
               
               
                 A 
                 2.165512E−04 
                  5.902810E−04 
                 −1.948717E−03 
                 −8.032534E−04 
               
               
                 B 
                   
                   
                 −1.404632E−04 
                 −1.053855E−04 
               
               
                 C 
                   
                   
                  1.190215E−05 
                  2.275369E−06 
               
               
                 D 
                   
                   
                 −1.106931E−06 
                  4.361826E−09 
               
               
                 E 
                   
                   
                  2.610738E−08 
                 −3.299868E−10 
               
               
                   
               
            
           
         
       
     
     An imaging lens system according to a second embodiment will be described with reference to  FIG.  3   . 
     The imaging lens system  200  may include a first lens  210 , a second lens  220 , a third lens  230 , a fourth lens  240 , a fifth lens  250 , and a sixth lens  260 . 
     The first lens  210  may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The second lens  220  may have negative refractive power, and may have a concave object-side surface and a convex image-side surface. The third lens  230  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fourth lens  240  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fifth lens  250  may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The sixth lens  260  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. An inflection point may be formed on the object-side surface and the image-side surface of the sixth lens  260 . 
     The imaging lens system  200  may further include a stop ST, a filter IF, a cover glass CG, and an imaging plane IP. The stop ST may be disposed between the second lens  220  and the third lens  230 , and the filter IF and the cover glass CG may be disposed between the sixth lens  260  and the imaging plane IP. The imaging plane IP may be formed in a position in which light incident by the first lens  210  to the sixth lens  260  is formed. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or within the image sensor IS. 
     Tables 3 and 4 list the lens properties and aspherical values of the imaging lens system according to the embodiment, and  FIG.  4    presents aberration curves of the imaging lens system according to the embodiment. 
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 3 
               
               
                   
               
               
                   
                   
                 Radius of 
                 Thickness/ 
                 Refractive 
                 Abbe 
                 Effective 
               
               
                 Surface No. 
                 Component 
                 Curvature 
                 Distance 
                 Index 
                 Number 
                 Diameter 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S1 
                 First Lens 
                 −28.092 
                 1.000 
                 1.552 
                 75.5 
                 5.776 
               
               
                 S2 
                   
                 28.957 
                 2.240 
                   
                   
                 5.285 
               
               
                 S3 
                 Second Lens 
                 −8.000 
                 2.800 
                 1.778 
                 47.2 
                 5.154 
               
               
                 S4 
                   
                 −12.976 
                 3.383 
                   
                   
                 5.197 
               
               
                 S5 
                 Stop 
                 Infinity 
                 0.030 
                   
                   
                 5.099 
               
               
                 S6 
                 Third Lens 
                 12.706 
                 2.800 
                 1.595 
                 68.6 
                 6.084 
               
               
                 S7 
                   
                 −41.239 
                 1.913 
                   
                   
                 6.145 
               
               
                 S8 
                 Fourth Lens 
                 10.508 
                 2.830 
                 1.777 
                 49.5 
                 6.302 
               
               
                 S9 
                   
                 −122.303 
                 1.082 
                   
                   
                 6.135 
               
               
                 S10 
                 Fifth Lens 
                 −23.868 
                 1.068 
                 1.760 
                 25.0 
                 5.803 
               
               
                 S11 
                   
                 8.147 
                 0.680 
                   
                   
                 5.145 
               
               
                 S12 
                 Sixth Lens 
                 11.511 
                 2.800 
                 1.777 
                 49.5 
                 5.433 
               
               
                 S13 
                   
                 −64.971 
                 2.722 
                   
                   
                 4.977 
               
               
                 S14 
                 Filter 
                 Infinity 
                 0.400 
                 1.519 
                 64.2 
                 5.066 
               
               
                 S15 
                   
                 Infinity 
                 0.550 
                   
                   
                 5.077 
               
               
                 S16 
                 Cover Glass 
                 Infinity 
                 0.400 
                 1.519 
                 64.2 
                 5.100 
               
               
                 S17 
                   
                 Infinity 
                 5.659 
                   
                   
                 5.111 
               
               
                 S18 
                 Imaging Plane 
                 Infinity 
                 0.000 
                   
                   
                 5.351 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
             
               
                 TABLE 4 
               
               
                   
               
               
                 Surface 
                   
                   
                   
                   
               
               
                 No. 
                 S3 
                 S4 
                 S12 
                 S13 
               
               
                   
               
             
            
               
                 K 
                 −9.881809E−02 
                 7.777624E−01 
                 4.252814E−04 
                 7.288455E−04 
               
               
                 A 
                  7.535680E−04 
                 5.706888E−04 
                 6.576068E−06 
                 1.581817E−05 
               
               
                 B 
                  4.310840E−06 
                 3.752684E−06 
                 −4.022184E−09  
                 −1.540529E−07  
               
               
                 C 
                 −2.453584E−08 
                 7.155995E−09 
                 4.084082E−09 
                 1.929469E−08 
               
               
                   
               
            
           
         
       
     
     An imaging lens system according to a third embodiment will be described with reference to  FIG.  5   . 
     The imaging lens system  300  may include a first lens  310 , a second lens  320 , a third lens  330 , a fourth lens  340 , a fifth lens  350 , and a sixth lens  360 . 
     The first lens  310  may have positive refractive power, and may have a convex object-side surface and a concave image-side surface. The second lens  320  may have negative refractive power, and may have a convex object-side surface and a concave image-side surface. The third lens  330  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fourth lens  340  may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The fifth lens  350  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The sixth lens  360  may have positive refractive power, and may have a concave object-side surface and a convex image-side surface. An inflection point may be formed on the object-side surface and the image-side surface of the sixth lens  360 . In the embodiment, the fourth lens  340  and the fifth lens  350  may be bonded to each other. In greater detail, a radius of curvature of the image-side surface of the fourth lens  340  and a radius of curvature of the object-side surface of the fifth lens  350  may be configured to be the same, and an air gap between the image-side surface of the fourth lens  340  and the object-side surface of the fifth lens  350  may be substantially approximate to zero. 
     The imaging lens system  300  may further include a stop ST, a filter IF, a cover glass CG, and an imaging plane IP. The stop ST may be disposed between the second lens  320  and the third lens  330 , and the filter IF and the cover glass CG may be disposed between the sixth lens  360  and the imaging plane IP. The imaging plane IP may be formed in a position in which light incident by the first lens  310  to the sixth lens  360  is formed. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or within the image sensor IS. 
     Tables 5 and 6 list the lens properties and aspherical values of the imaging lens system according to the embodiment, and  FIG.  6    presents aberration curves of the imaging lens system according to the embodiment. 
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 5 
               
               
                   
               
               
                   
                   
                 Radius of 
                 Thickness/ 
                 Refractive 
                 Abbe 
                 Effective 
               
               
                 Surface No. 
                 Component 
                 Curvature 
                 Distance 
                 Index 
                 Number 
                 Diameter 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S1 
                 First Lens 
                 6.934 
                 2.778 
                 1.777 
                 49.6 
                 6.863 
               
               
                 S2 
                   
                 6.960 
                 3.740 
                   
                   
                 5.866 
               
               
                 S3 
                 Second Lens 
                 26.480 
                 1.000 
                 1.884 
                 41.0 
                 4.848 
               
               
                 S4 
                   
                 5.252 
                 5.325 
                   
                   
                 3.685 
               
               
                 S5 
                 Stop 
                 Infinity 
                 1.111 
                   
                   
                 2.945 
               
               
                 S6 
                 Third Lens 
                 7.877 
                 2.067 
                 1.779 
                 36.2 
                 4.034 
               
               
                 S7 
                   
                 −13.424 
                 1.226 
                   
                   
                 4.010 
               
               
                 S8 
                 Fourth Lens 
                 −13.414 
                 0.515 
                 1.820 
                 26.3 
                 3.654 
               
               
                 S9 
                 Fifth Lens 
                 4.445 
                 2.658 
                 1.782 
                 44.7 
                 3.601 
               
               
                 S10 
                   
                 −25.639 
                 1.675 
                   
                   
                 3.654 
               
               
                 S11 
                 Sixth Lens 
                 −13.412 
                 1.306 
                 1.595 
                 68.6 
                 3.727 
               
               
                 S12 
                   
                 −7.265 
                 2.722 
                   
                   
                 4.011 
               
               
                 S13 
                 Filter 
                 Infinity 
                 0.400 
                 1.519 
                 64.2 
                 4.541 
               
               
                 S14 
                   
                 Infinity 
                 0.550 
                   
                   
                 4.579 
               
               
                 S15 
                 Cover Glass 
                 Infinity 
                 0.400 
                 1.519 
                 64.2 
                 4.658 
               
               
                 S16 
                   
                 Infinity 
                 4.526 
                   
                   
                 4.695 
               
               
                 S17 
                 Imaging Plane 
                 Infinity 
                 0.001 
                   
                   
                 5.352 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 6 
               
               
                   
               
               
                 Surface No. 
                 S3 
                 S4 
                 S6 
                 S7 
                 S11 
                 S12 
               
               
                   
               
             
            
               
                 K 
                 0.00000E+00 
                 0.00000E+00 
                 0.00000E+00 
                 0.00000E+00 
                 9.62630E+00 
                 1.19220E+00 
               
               
                 A 
                 −2.00556E−04  
                 2.00965E−04 
                 2.80697E−05 
                 3.86819E−04 
                 4.40961E−04 
                 1.41768E−03 
               
               
                 B 
                 2.75929E−06 
                 −1.34756E−07  
                 2.12179E−06 
                 −4.90220E−07  
                 1.30091E−06 
                 2.73979E−05 
               
               
                 C 
                   
                   
                   
                   
                 7.61748E−10 
                 −4.20402E−07  
               
               
                 D 
                   
                   
                   
                   
                 −8.97563E−08  
                 −1.56414E−08  
               
               
                   
               
            
           
         
       
     
     An imaging lens system according to a fourth embodiment will be described with reference to  FIG.  7   . 
     The imaging lens system  400  may include a first lens  410 , a second lens  420 , a third lens  430 , a fourth lens  440 , a fifth lens  450 , and a sixth lens  460 . 
     The first lens  410  may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The second lens  420  may have positive refractive power, and may have a concave object-side surface and a convex image-side surface. The third lens  430  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fourth lens  440  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fifth lens  450  may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The sixth lens  460  may have positive refractive power, and may have a concave object-side surface and a convex image-side surface. An inflection point may be formed on the object-side surface and the image-side surface of the sixth lens  460 . In the embodiment, the fourth lens  440  and the fifth lens  450  may be bonded to each other. In greater detail, a radius of curvature of the image-side surface of the fourth lens  440  and a radius of curvature of the object-side surface of the fifth lens  350  may be configured to be the same, and an air gap between the image-side surface of the fourth lens  440  and the object-side surface of the fifth lens  450  may be substantially approximate to zero. 
     The imaging lens system  400  may further include a stop ST, a filter IF, a cover glass CG, and an imaging plane IP. The stop ST may be disposed between the second lens  420  and the third lens  430 , and the filter IF and the cover glass CG may be disposed between the sixth lens  460  and the imaging plane IP. The imaging plane IP may be formed in a position in which light incident by the first lens  410  to the sixth lens  460  is formed. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or within the image sensor IS. 
     Tables 7 and 8 list the lens properties and aspherical values of the imaging lens system according to the embodiment, and  FIG.  8    presents aberration curves of the imaging lens system according to the embodiment. 
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 7 
               
               
                   
               
               
                   
                   
                 Radius of 
                 Thickness/ 
                 Refractive 
                 Abbe 
                 Effective 
               
               
                 Surface No. 
                 Component 
                 Curvature 
                 Distance 
                 Index 
                 Number 
                 Diameter 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S1 
                 First Lens 
                 −73.506 
                 1.000 
                 1.777 
                 49.6 
                 5.209 
               
               
                 S2 
                   
                 17.566 
                 2.455 
                   
                   
                 4.752 
               
               
                 S3 
                 Second Lens 
                 −7.097 
                 2.599 
                 1.748 
                 44.9 
                 4.733 
               
               
                 S4 
                   
                 −7.661 
                 2.360 
                   
                   
                 5.254 
               
               
                 S5 
                 Stop 
                 Infinity 
                 0.959 
                   
                   
                 5.035 
               
               
                 S6 
                 Third Lens 
                 26.611 
                 2.865 
                 1.725 
                 50.5 
                 6.111 
               
               
                 S7 
                   
                 −13.630 
                 0.130 
                   
                   
                 6.141 
               
               
                 S8 
                 Fourth Lens 
                 13.000 
                 4.095 
                 1.701 
                 55.0 
                 5.919 
               
               
                 S9 
                 Fifth Lens 
                 −15.026 
                 0.500 
                 1.779 
                 24.7 
                 5.509 
               
               
                 S10 
                   
                 10.450 
                 1.845 
                   
                   
                 4.901 
               
               
                 S11 
                 Sixth Lens 
                 −17.178 
                 2.364 
                 1.758 
                 52.4 
                 4.904 
               
               
                 S12 
                   
                 −11.803 
                 2.722 
                   
                   
                 4.936 
               
               
                 S13 
                 Filter 
                 Infinity 
                 0.400 
                 1.519 
                 64.2 
                 5.072 
               
               
                 S14 
                   
                 Infinity 
                 0.550 
                   
                   
                 5.083 
               
               
                 S15 
                 Cover Glass 
                 Infinity 
                 0.400 
                 1.519 
                 64.2 
                 5.106 
               
               
                 S16 
                   
                 Infinity 
                 5.256 
                   
                   
                 5.117 
               
               
                 S17 
                 Imaging Plane 
                 Infinity 
                 0.000 
                   
                   
                 5.345 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
             
               
                 TABLE 8 
               
               
                   
               
               
                 Surface 
                   
                   
                   
                   
               
               
                 No. 
                 S3 
                 S4 
                 S11 
                 S12 
               
               
                   
               
             
            
               
                 K 
                 7.83667E−03 
                 −1.30191E−01  
                 7.89275E+00 
                 2.96276E+00 
               
               
                 A 
                 −2.90564E−04  
                 2.35950E−04 
                 9.08003E−04 
                 9.33734E−04 
               
               
                 B 
                 2.16128E−05 
                 8.82309E−06 
                 9.36894E−06 
                 1.23129E−05 
               
               
                 C 
                 2.54554E−07 
                 1.65942E−07 
                 −4.42549E−08  
                 1.69766E−07 
               
               
                 D 
                 −1.10355E−08  
                 −5.04862E−09  
                 −2.56948E−09  
                 7.21125E−10 
               
               
                   
               
            
           
         
       
     
     An imaging lens system according to a fifth embodiment will be described with reference to  FIG.  9   . 
     The imaging lens system  500  may include a first lens  510 , a second lens  520 , a third lens  530 , a fourth lens  540 , a fifth lens  550 , and a sixth lens  560 . 
     The first lens  510  may have positive refractive power, and may have a convex object-side surface and a concave image-side surface. The second lens  520  may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The third lens  530  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fourth lens  540  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fifth lens  550  may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The sixth lens  560  may have positive refractive power, and may have a convex object-side surface and a concave image-side surface. An inflection point may be formed on the object-side surface and the image-side surface of the sixth lens  560 . In the embodiment, the fourth lens  540  and the fifth lens  550  may be bonded to each other. In greater detail, a radius of curvature of the image-side surface of the fourth lens  540  and a radius of curvature of the object-side surface of the fifth lens  550  may be configured to be the same, and an air gap between the image-side surface of the fourth lens  540  and the object-side surface of the fifth lens  550  may be substantially approximate to zero. 
     The imaging lens system  500  may further include a stop ST, a filter IF, a cover glass CG, and an imaging plane IP. The stop ST may be disposed between the second lens  520  and the third lens  530 , and the filter IF and the cover glass CG may be disposed between the sixth lens  560  and the imaging plane IP. The imaging plane IP may be formed in a position in which light incident by the first lens  510  to the sixth lens  560  is formed. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or within the image sensor IS. 
     Tables 9 and 10 list the lens properties and aspherical values of the imaging lens system according to the embodiment, and  FIG.  10    presents aberration curves of the imaging lens system according to the embodiment. 
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 9 
               
               
                   
               
               
                   
                   
                 Radius of 
                 Thickness/ 
                 Refractive 
                 Abbe 
                 Effective 
               
               
                 Surface No. 
                 Component 
                 Curvature 
                 Distance 
                 Index 
                 Number 
                 Diameter 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S1 
                 First Lens 
                 10.000 
                 2.669 
                 1.776 
                 49.6 
                 5.629 
               
               
                 S2 
                   
                 16.155 
                 1.139 
                   
                   
                 4.652 
               
               
                 S3 
                 Second Lens 
                 −20.453 
                 0.750 
                 1.593 
                 42.8 
                 4.678 
               
               
                 S4 
                   
                 6.000 
                 3.940 
                   
                   
                 3.776 
               
               
                 S5 
                 Stop 
                 Infinity 
                 0.625 
                   
                   
                 3.335 
               
               
                 S6 
                 Third Lens 
                 12.275 
                 1.676 
                 1.823 
                 43.0 
                 4.232 
               
               
                 S7 
                   
                 −29.631 
                 1.733 
                   
                   
                 4.295 
               
               
                 S8 
                 Fourth Lens 
                 10.154 
                 3.788 
                 1.751 
                 46.2 
                 4.508 
               
               
                 S9 
                 Fifth Lens 
                 −6.338 
                 0.750 
                 1.792 
                 24.2 
                 4.335 
               
               
                 S10 
                   
                 22.460 
                 4.330 
                   
                   
                 3.943 
               
               
                 S11 
                 Sixth Lens 
                 18.087 
                 2.450 
                 1.585 
                 61.0 
                 3.680 
               
               
                 S12 
                   
                 29.050 
                 0.520 
                   
                   
                 4.691 
               
               
                 S13 
                 Filter 
                 Infinity 
                 0.400 
                 1.519 
                 64.2 
                 5.001 
               
               
                 S14 
                   
                 Infinity 
                 0.562 
                   
                   
                 5.039 
               
               
                 S15 
                 Cover Glass 
                 Infinity 
                 0.400 
                 1.519 
                 64.2 
                 5.122 
               
               
                 S16 
                   
                 Infinity 
                 1.178 
                   
                   
                 5.160 
               
               
                 S17 
                 Imaging Plane 
                 Infinity 
                 0.000 
                   
                   
                 5.345 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
             
               
                 TABLE 10 
               
               
                   
               
               
                 Surface 
                   
                   
                   
                   
               
               
                 No. 
                 S3 
                 S4 
                 S11 
                 S12 
               
               
                   
               
             
            
               
                 K 
                 9.86586E+00 
                 −1.15360E+00 
                  0.00000E+00 
                  1.68552E+01 
               
               
                 A 
                 2.79998E−04 
                  5.30376E−04 
                 −2.77754E−03 
                 −2.30918E−03 
               
               
                 B 
                 1.76888E−07 
                 −1.39688E−06 
                 −1.44029E−04 
                 −1.18256E−04 
               
               
                 C 
                 1.16564E−07 
                  1.37576E−07 
                 −9.73554E−07 
                  3.79047E−06 
               
               
                 D 
                   
                   
                  4.92115E−07 
                 −1.03650E−07 
               
               
                 E 
                   
                   
                 −7.32140E−08 
               
               
                   
               
            
           
         
       
     
     An imaging lens system according to a sixth embodiment will be described with reference to  FIG.  11   . 
     The imaging lens system  600  may include a first lens  610 , a second lens  620 , a third lens  630 , a fourth lens  640 , a fifth lens  650 , and a sixth lens  660 . 
     The first lens  610  may have positive refractive power, and may have a convex object-side surface and a concave image-side surface. The second lens  620  may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The third lens  630  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fourth lens  640  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fifth lens  650  may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The sixth lens  660  may have positive refractive power, and may have a convex object-side surface and a concave image-side surface. An inflection point may be formed on the object-side surface and the image-side surface of the sixth lens  660 . In the embodiment, the fourth lens  640  and the fifth lens  650  may be bonded to each other. In greater detail, a radius of curvature of the image-side surface of the fourth lens  640  and a radius of curvature of the object-side surface of the fifth lens  650  may be configured to be the same, and an air gap between the image-side surface of the fourth lens  640  and the object-side surface of the fifth lens  650  may be substantially approximate to zero. 
     The imaging lens system  600  may further include a stop ST, a filter IF, a cover glass CG, and an imaging plane IP. The stop ST may be disposed between the second lens  620  and the third lens  630 , and the filter IF and the cover glass CG may be disposed between the sixth lens  660  and the imaging plane IP. The imaging plane IP may be formed in a position in which light incident by the first lens  610  to the sixth lens  660  is formed. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or within the image sensor IS. 
     Tables 11 and 12 list the lens properties and aspherical values of the imaging lens system according to the embodiment, and  FIG.  12    presents aberration curves of the imaging lens system according to the embodiment. 
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 11 
               
               
                   
               
               
                   
                   
                 Radius of 
                 Thickness/ 
                 Refractive 
                 Abbe 
                 Effective 
               
               
                 Surface No. 
                 Component 
                 Curvature 
                 Distance 
                 Index 
                 Number 
                 Diameter 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S1 
                 First Lens 
                 10.060 
                 1.590 
                 1.776 
                 49.6 
                 5.368 
               
               
                 S2 
                   
                 16.146 
                 1.276 
                   
                   
                 4.901 
               
               
                 S3 
                 Second Lens 
                 −20.864 
                 0.800 
                 1.562 
                 42.6 
                 4.899 
               
               
                 S4 
                   
                 6.715 
                 4.575 
                   
                   
                 3.988 
               
               
                 S5 
                 Stop 
                 Infinity 
                 0.100 
                   
                   
                 3.335 
               
               
                 S6 
                 Third Lens 
                 11.589 
                 3.971 
                 1.874 
                 41.2 
                 3.878 
               
               
                 S7 
                   
                 −38.504 
                 1.034 
                   
                   
                 4.121 
               
               
                 S8 
                 Fourth Lens 
                 9.457 
                 3.836 
                 1.742 
                 46.7 
                 4.244 
               
               
                 S9 
                 Fifth Lens 
                 −7.050 
                 0.800 
                 1.835 
                 23.1 
                 3.955 
               
               
                 S10 
                   
                 16.667 
                 3.245 
                   
                   
                 3.644 
               
               
                 S11 
                 Sixth Lens 
                 30.207 
                 4.791 
                 1.632 
                 40.7 
                 3.680 
               
               
                 S12 
                   
                 33.862 
                 0.520 
                   
                   
                 4.981 
               
               
                 S13 
                 Filter 
                 Infinity 
                 0.400 
                 1.519 
                 64.2 
                 5.165 
               
               
                 S14 
                   
                 Infinity 
                 0.562 
                   
                   
                 5.206 
               
               
                 S15 
                 Cover Glass 
                 Infinity 
                 0.400 
                 1.519 
                 64.2 
                 5.295 
               
               
                 S16 
                   
                 Infinity 
                 0.101 
                   
                   
                 5.336 
               
               
                 S17 
                 Imaging Plane 
                 Infinity 
                 0.000 
                   
                   
                 5.352 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
             
               
                 TABLE 12 
               
               
                   
               
               
                 Surface 
                   
                   
                   
                   
               
               
                 No. 
                 S3 
                 S4 
                 S11 
                 S12 
               
               
                   
               
             
            
               
                 K 
                 7.98492E+00 
                 −1.29231E+00 
                  0.00000E+00 
                  4.95617E+00 
               
               
                 A 
                 2.54365E−04 
                  4.82166E−04 
                 −1.75631E−03 
                 −5.55872E−04 
               
               
                 B 
                 −3.92538E−07  
                 −2.03874E−07 
                 −3.20451E−05 
                 −9.98970E−05 
               
               
                 C 
                 5.87931E−08 
                  9.36439E−08 
                 −2.51873E−06 
                  2.21204E−06 
               
               
                 D 
                   
                   
                 −2.38878E−08 
               
               
                   
               
            
           
         
       
     
     An imaging lens system according to a seventh embodiment will be described with reference to  FIG.  13   . 
     The imaging lens system  700  may include a first lens  710 , a second lens  720 , a third lens  730 , a fourth lens  740 , a fifth lens  750 , and a sixth lens  760 . 
     The first lens  710  may have positive refractive power, and may have a convex object-side surface and a concave image-side surface. The second lens  720  may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The third lens  730  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fourth lens  740  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fifth lens  750  may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The sixth lens  760  may have negative refractive power, and may have a convex object-side surface and a concave image-side surface. An inflection point may be formed on the object-side surface and the image-side surface of the sixth lens  760 . In the embodiment, the fourth lens  740  and the fifth lens  750  may be bonded to each other. In greater detail, a radius of curvature of the image-side surface of the fourth lens  740  and a radius of curvature of the object-side surface of the fifth lens  750  may be configured to be the same, and an air gap between the image-side surface of the fourth lens  740  and the object-side surface of the fifth lens  750  may be substantially approximate to zero. 
     The imaging lens system  700  may further include a stop ST, a filter IF, a cover glass CG, and an imaging plane IP. The stop ST may be disposed between the third lens  730  and the fourth lens  740 , and the filter IF and the cover glass CG may be disposed between the sixth lens  760  and the imaging plane IP. The imaging plane IP may be formed in a position in which light incident by the first lens  710  to the sixth lens  760  is formed. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or within the image sensor IS. 
     Tables 13 and 14 list the lens properties and aspherical values of the imaging lens system according to the embodiment, and  FIG.  14    presents aberration curves of the imaging lens system according to the embodiment. 
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 13 
               
               
                   
               
               
                   
                   
                 Radius of 
                 Thickness/ 
                 Refractive 
                 Abbe 
                 Effective 
               
               
                 Surface No. 
                 Component 
                 Curvature 
                 Distance 
                 Index 
                 Number 
                 Diameter 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S1 
                 First Lens 
                 10.597 
                 1.378 
                 1.776 
                 49.6 
                 5.743 
               
               
                 S2 
                   
                 20.366 
                 1.600 
                   
                   
                 5.481 
               
               
                 S3 
                 Second Lens 
                 −15.905 
                 0.550 
                 1.577 
                 38.6 
                 5.550 
               
               
                 S4 
                   
                 6.000 
                 4.452 
                   
                   
                 4.584 
               
               
                 S5 
                 Third Lens 
                 12.733 
                 3.525 
                 1.888 
                 40.8 
                 4.664 
               
               
                 S6 
                   
                 −23.591 
                 1.428 
                   
                   
                 4.283 
               
               
                 S7 
                 Stop 
                 Infinity 
                 1.437 
                   
                   
                 3.233 
               
               
                 S8 
                 Fourth Lens 
                 10.354 
                 2.262 
                 1.697 
                 49.5 
                 3.609 
               
               
                 S9 
                 Fifth Lens 
                 −6.992 
                 0.800 
                 1.812 
                 23.7 
                 3.595 
               
               
                 S10 
                   
                 41.748 
                 5.089 
                   
                   
                 3.627 
               
               
                 S11 
                 Sixth Lens 
                 44.983 
                 3.500 
                 1.555 
                 58.9 
                 4.072 
               
               
                 S12 
                   
                 31.949 
                 0.520 
                   
                   
                 5.082 
               
               
                 S13 
                 Filter 
                 Infinity 
                 0.400 
                 1.519 
                 64.2 
                 5.218 
               
               
                 S14 
                   
                 Infinity 
                 0.562 
                   
                   
                 5.246 
               
               
                 S15 
                 Cover Glass 
                 Infinity 
                 0.400 
                 1.519 
                 64.2 
                 5.306 
               
               
                 S16 
                   
                 Infinity 
                 0.100 
                   
                   
                 5.334 
               
               
                 S17 
                 Imaging Plane 
                 Infinity 
                 0.000 
                   
                   
                 5.345 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
             
               
                 TABLE 14 
               
               
                   
               
               
                 Surface 
                   
                   
                   
                   
               
               
                 No. 
                 S3 
                 S4 
                 S11 
                 S12 
               
               
                   
               
             
            
               
                 K 
                 3.95997E+00 
                 −1.32152E+00 
                  0.00000E+00 
                 3.19494E+01 
               
               
                 A 
                 1.92067E−04 
                  4.74460E−04 
                 −1.72200E−03 
                 1.34595E+01 
               
               
                 B 
                 1.77871E−06 
                 −1.03994E−06 
                 −5.12353E−05 
                 −3.92632E−04  
               
               
                 C 
                 3.65087E−08 
                  5.66446E−08 
                  1.65233E−06 
                 −1.13089E−04  
               
               
                 D 
                   
                   
                 −2.28035E−07 
                 1.77916E−06 
               
               
                 E 
                   
                   
                  7.29476E−09 
                 3.58179E−08 
               
               
                 F 
                   
                   
                   
                 −6.62678E−10  
               
               
                   
               
            
           
         
       
     
     An imaging lens system according to an eighth embodiment will be described with reference to  FIG.  15   . 
     The imaging lens system  800  may include a first lens  810 , a second lens  820 , a third lens  830 , a fourth lens  840 , a fifth lens  850 , and a sixth lens  860 . 
     The first lens  810  may have positive refractive power, and may have a convex object-side surface and a concave image-side surface. The second lens  820  may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The third lens  830  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fourth lens  840  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fifth lens  850  may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The sixth lens  860  may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. An inflection point may be formed on the object-side surface and the image-side surface of the sixth lens  860 . In the embodiment, the fourth lens  840  and the fifth lens  850  may be bonded to each other. In greater detail, a radius of curvature of the image-side surface of the fourth lens  840  and a radius of curvature of the object-side surface of the fifth lens  850  may be configured to be the same, and an air gap between the image-side surface of the fourth lens  840  and the object-side surface of the fifth lens  850  may be substantially approximate to zero. 
     The imaging lens system  800  may further include a stop ST, a filter IF, a cover glass CG, and an imaging plane IP. The stop ST may be disposed between the third lens  830  and the fourth lens  840 , and the filter IF and the cover glass CG may be disposed between the sixth lens  860  and the imaging plane IP. The imaging plane IP may be formed in a position in which light incident by the first lens  810  to the sixth lens  860  is formed. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or within the image sensor IS. 
     Tables 15 and 16 list the lens properties and aspherical values of the imaging lens system according to the embodiment, and  FIG.  16    presents aberration curves of the imaging lens system according to the embodiment. 
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 15 
               
               
                   
               
               
                   
                   
                 Radius of 
                 Thickness/ 
                 Refractive 
                 Abbe 
                 Effective 
               
               
                 Surface No. 
                 Component 
                 Curvature 
                 Distance 
                 Index 
                 Number 
                 Diameter 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S1 
                 First Lens 
                 12.858 
                 1.364 
                 1.776 
                 49.6 
                 5.603 
               
               
                 S2 
                   
                 30.158 
                 1.373 
                   
                   
                 5.312 
               
               
                 S3 
                 Second Lens 
                 −15.545 
                 0.550 
                 1.620 
                 33.3 
                 5.309 
               
               
                 S4 
                   
                 6.075 
                 4.692 
                   
                   
                 4.498 
               
               
                 S5 
                 Third Lens 
                 12.195 
                 1.894 
                 1.888 
                 40.8 
                 4.632 
               
               
                 S6 
                   
                 −22.267 
                 1.420 
                   
                   
                 4.548 
               
               
                 S7 
                 Stop 
                 Infinity 
                 3.371 
                   
                   
                 3.516 
               
               
                 S8 
                 Fourth Lens 
                 10.913 
                 2.729 
                 1.764 
                 45.6 
                 3.987 
               
               
                 S9 
                 Fifth Lens 
                 −6.176 
                 0.550 
                 1.847 
                 22.8 
                 3.618 
               
               
                 S10 
                   
                 30.465 
                 4.442 
                   
                   
                 3.872 
               
               
                 S11 
                 Sixth Lens 
                 −210.780 
                 3.500 
                 1.674 
                 51.2 
                 4.030 
               
               
                 S12 
                   
                 2476.692 
                 0.520 
                   
                   
                 5.291 
               
               
                 S13 
                 Filter 
                 Infinity 
                 0.400 
                 1.519 
                 64.2 
                 5.323 
               
               
                 S14 
                   
                 Infinity 
                 0.562 
                   
                   
                 5.327 
               
               
                 S15 
                 Cover Glass 
                 Infinity 
                 0.400 
                 1.519 
                 64.2 
                 5.336 
               
               
                 S16 
                   
                 Infinity 
                 0.235 
                   
                   
                 5.340 
               
               
                 S17 
                 Imaging Plane 
                 Infinity 
                 0.000 
                   
                   
                 5.345 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 16 
               
               
                   
               
               
                 Surface No. 
                 S3 
                 S4 
                 S5 
                 S6 
                 S11 
                 S12 
               
               
                   
               
             
            
               
                 K 
                 2.21547E+00 
                 −1.44874E+00 
                 −4.60294E−01 
                 1.98166E−02 
                  0.00000E+00 
                  0.00000E+00 
               
               
                 A 
                 9.68423E−05 
                  3.93995E−04 
                 −3.85667E−05 
                 1.57301E−07 
                 −1.95405E−03 
                 −7.24813E−04 
               
               
                 B 
                 1.64792E−06 
                 −3.36259E−06 
                 −6.82706E−07 
                 −1.15687E−07  
                 −5.97650E−05 
                 −1.01180E−04 
               
               
                 C 
                   
                   
                   
                   
                  5.10232E−07 
                  3.13782E−06 
               
               
                 D 
                   
                   
                   
                   
                 −1.08215E−07 
                 −3.61878E−08 
               
               
                   
               
            
           
         
       
     
     An imaging lens system according to a ninth embodiment will be described with reference to  FIG.  17   . 
     The imaging lens system  900  may include a first lens  910 , a second lens  920 , a third lens  930 , a fourth lens  940 , a fifth lens  950 , and a sixth lens  960 . 
     The first lens  910  may have positive refractive power, and may have a convex object-side surface and a concave image-side surface. The second lens  920  may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The third lens  930  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fourth lens  940  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fifth lens  950  may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The sixth lens  960  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. An inflection point may be formed on the object-side surface and the image-side surface of the sixth lens  960 . In the embodiment, the fourth lens  940  and the fifth lens  950  may be bonded to each other. In greater detail, a radius of curvature of the image-side surface of the fourth lens  940  and a radius of curvature of the object-side surface of the fifth lens  950  may be configured to be the same, and an air gap between the image-side surface of the fourth lens  940  and the object-side surface of the fifth lens  950  may be substantially approximate to zero. 
     The imaging lens system  900  may further include a stop ST, a filter IF, a cover glass CG, and an imaging plane IP. The stop ST may be disposed between the third lens  930  and the fourth lens  940 , and the filter IF and the cover glass CG may be disposed between the sixth lens  960  and the imaging plane IP. The imaging plane IP may be formed in a position in which light incident by the first lens  910  to the sixth lens  960  is formed. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or within the image sensor IS. 
     Tables 17 and 18 list the lens properties and aspherical values of the imaging lens system according to the embodiment, and  FIG.  18    presents aberration curves of the imaging lens system according to the embodiment. 
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 17 
               
               
                   
               
               
                   
                   
                 Radius of 
                 Thickness/ 
                 Refractive 
                 Abbe 
                 Effective 
               
               
                 Surface No. 
                 Component 
                 Curvature 
                 Distance 
                 Index 
                 Number 
                 Diameter 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S1 
                 First Lens 
                 15.589 
                 1.191 
                 1.776 
                 49.6 
                 5.921 
               
               
                 S2 
                   
                 44.650 
                 1.700 
                   
                   
                 5.728 
               
               
                 S3 
                 Second Lens 
                 −12.023 
                 1.000 
                 1.596 
                 35.8 
                 5.562 
               
               
                 S4 
                   
                 7.285 
                 3.502 
                   
                   
                 4.646 
               
               
                 S5 
                 Third Lens 
                 16.102 
                 1.800 
                 1.888 
                 40.8 
                 4.772 
               
               
                 S6 
                   
                 −21.235 
                 1.830 
                   
                   
                 4.707 
               
               
                 S7 
                 Stop 
                 Infinity 
                 2.771 
                   
                   
                 3.530 
               
               
                 S8 
                 Fourth Lens 
                 9.993 
                 3.916 
                 1.870 
                 41.3 
                 4.578 
               
               
                 S9 
                 Fifth Lens 
                 −8.042 
                 1.000 
                 1.863 
                 22.5 
                 4.418 
               
               
                 S10 
                   
                 15.076 
                 3.151 
                   
                   
                 4.267 
               
               
                 S11 
                 Sixth Lens 
                 34.179 
                 1.943 
                 1.584 
                 61.2 
                 4.158 
               
               
                 S12 
                   
                 −90.077 
                 0.520 
                   
                   
                 4.785 
               
               
                 S13 
                 Filter 
                 Infinity 
                 0.400 
                 1.519 
                 64.2 
                 4.971 
               
               
                 S14 
                   
                 Infinity 
                 0.562 
                   
                   
                 5.000 
               
               
                 S15 
                 Cover Glass 
                 Infinity 
                 0.400 
                 1.519 
                 64.2 
                 5.063 
               
               
                 S16 
                   
                 Infinity 
                 2.314 
                   
                   
                 5.092 
               
               
                 S17 
                 Imaging Plane 
                 Infinity 
                 0.000 
                   
                   
                 5.348 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
             
               
                 TABLE 18 
               
               
                   
               
               
                 Surface 
                   
                   
                   
                   
               
               
                 No. 
                 S3 
                 S4 
                 S11 
                 S12 
               
               
                   
               
             
            
               
                 K 
                 1.29022E+00 
                 −1.57016E+00  
                  5.71980E+01 
                  0.00000E+00 
               
               
                 A 
                 2.67662E−04 
                 3.88988E−04 
                 −2.00205E−03 
                 −8.33606E−04 
               
               
                 B 
                 3.74058E−06 
                 2.62589E−06 
                 −8.14225E−05 
                 −8.65352E−05 
               
               
                 C 
                 −1.65000E−08  
                 1.73519E−08 
                 −1.73308E−06 
                  1.60419E−06 
               
               
                   
               
            
           
         
       
     
     An imaging lens system according to a tenth embodiment will be described with reference to  FIG.  19   . 
     The imaging lens system  1000  may include a first lens  1010 , a second lens  1020 , a third lens  1030 , a fourth lens  1040 , a fifth lens  1050 , and a sixth lens  1060 . 
     The first lens  1010  may have positive refractive power, and may have a convex object-side surface and a concave image-side surface. The second lens  1020  may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The third lens  1030  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The fourth lens  1040  may have negative refractive power, and may have a concave object-side surface and a concave image-side surface. The fifth lens  1050  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. The sixth lens  1060  may have positive refractive power, and may have a convex object-side surface and a convex image-side surface. An inflection point may be formed on the object-side surface and the image-side surface of the sixth lens  1060 . In the embodiment, the fourth lens  1040  and the fifth lens  1050  may be bonded to each other. In greater detail, a radius of curvature of the image-side surface of the fourth lens  1040  and a radius of curvature of the object-side surface of the fifth lens  1050  may be configured to be the same, and an air gap between the image-side surface of the fourth lens  1040  and the object-side surface of the fifth lens  1050  may be substantially approximate to zero. 
     The imaging lens system  1000  may further include a stop ST, a filter IF, a cover glass CG, and an imaging plane IP. The stop ST may be disposed between the third lens  1030  and the fourth lens  1040 , and the filter IF and the cover glass CG may be disposed between the sixth lens  1060  and the imaging plane IP. The imaging plane IP may be formed in a position in which light incident by the first lens  1010  to the sixth lens  1060  is formed. For example, the imaging plane IP may be formed on one surface of the image sensor IS of the camera module or within the image sensor IS. 
     Tables 19 and 20 list the lens properties and aspherical values of the imaging lens system according to the embodiment, and  FIG.  20    presents aberration curves of the imaging lens system according to the embodiment. 
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 19 
               
               
                   
               
               
                   
                   
                 Radius of 
                 Thickness/ 
                 Refractive 
                 Abbe 
                 Effective 
               
               
                 Surface No. 
                 Component 
                 Curvature 
                 Distance 
                 Index 
                 Number 
                 Diameter 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 S1 
                 First Lens 
                 17.587 
                 2.540 
                 1.776 
                 49.6 
                 7.829 
               
               
                 S2 
                   
                 61.414 
                 2.455 
                   
                   
                 7.249 
               
               
                 S3 
                 Second Lens 
                 −15.051 
                 0.750 
                 1.555 
                 45.4 
                 5.489 
               
               
                 S4 
                   
                 6.430 
                 3.375 
                   
                   
                 4.384 
               
               
                 S5 
                 Third Lens 
                 9.849 
                 2.065 
                 1.888 
                 40.8 
                 4.341 
               
               
                 S6 
                   
                 −19.357 
                 0.379 
                   
                   
                 4.203 
               
               
                 S7 
                 Stop 
                 Infinity 
                 1.613 
                   
                   
                 3.439 
               
               
                 S8 
                 Fourth Lens 
                 −7.863 
                 0.845 
                 1.785 
                 24.5 
                 3.502 
               
               
                 S9 
                 Fifth Lens 
                 11.594 
                 2.975 
                 1.735 
                 47.1 
                 4.125 
               
               
                 S10 
                   
                 −7.346 
                 0.100 
                   
                   
                 4.346 
               
               
                 S11 
                 Sixth Lens 
                 86.660 
                 1.644 
                 1.576 
                 62.4 
                 4.323 
               
               
                 S12 
                   
                 −33.583 
                 0.520 
                   
                   
                 4.701 
               
               
                 S13 
                 Filter 
                 Infinity 
                 0.400 
                 1.519 
                 64.2 
                 4.786 
               
               
                 S14 
                   
                 Infinity 
                 0.562 
                   
                   
                 4.802 
               
               
                 S15 
                 Cover Glass 
                 Infinity 
                 0.400 
                 1.519 
                 64.2 
                 4.835 
               
               
                 S16 
                   
                 Infinity 
                 7.378 
                   
                   
                 4.851 
               
               
                 S17 
                 Imaging Plane 
                 Infinity 
                 0.000 
                   
                   
                 5.410 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
             
               
                 TABLE 20 
               
               
                   
               
               
                 Surface 
                   
                   
                   
                   
               
               
                 No. 
                 S1 
                 S2 
                 S11 
                 S12 
               
               
                   
               
             
            
               
                 K 
                 0.00000E+00 
                 0.00000E+00 
                  0.00000E+00 
                 2.02040E+00 
               
               
                 A 
                 −6.01462E−05  
                 −1.06559E−04  
                 −1.15624E−03 
                 −6.15169E−04  
               
               
                 B 
                 1.03259E−06 
                 9.75900E−07 
                 −4.70360E−05 
                 −4.7779E−05 
               
               
                 C 
                 2.11703E−08 
                 9.80144E−08 
                 −4.73566E−07 
                 9.05485E−07 
               
               
                 D 
                 1.23817E−10 
                 −1.31001E−09  
               
               
                   
               
            
           
         
       
     
     Tables 21 and 22 list optical properties values and conditional expression values of the imaging lens system according to the first to tenth embodiments. 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 21 
               
               
                   
               
             
            
               
                   
                 First 
                 Second 
                 Third 
                 Fourth 
                 Fifth 
               
               
                 Element 
                 Embodiment 
                 Embodiment 
                 Embodiment 
                 Embodiment 
                 Embodiment 
               
               
                   
               
               
                 f1 
                 30.6781 
                 −25.6577 
                 50.0785 
                 −18.1688 
                 28.4288 
               
               
                 f2 
                 −7.2172 
                 −35.5687 
                 −7.5821 
                 132.3524 
                 −7.7388 
               
               
                 f3 
                 9.3027 
                 16.6446 
                 6.6563 
                 12.8088 
                 10.7442 
               
               
                 f4 
                 6.0497 
                 12.5773 
                 −4.0193 
                 10.5756 
                 5.7641 
               
               
                 f5 
                 −6.0578 
                 −7.8783 
                 5.0428 
                 −7.8469 
                 −6.1698 
               
               
                 f6 
                 86.5118 
                 12.7962 
                 24.6791 
                 41.8441 
                 75.6678 
               
               
                 TTL 
                 27.9999 
                 32.3580 
                 31.9997 
                 30.4987 
                 26.9097 
               
               
                 f 
                 10.2379 
                 10.5342 
                 10.1371 
                 10.4572 
                 10.6029 
               
               
                 f number 
                 1.6500 
                 1.6406 
                 2.0000 
                 1.6188 
                 1.7998 
               
               
                 ImgH 
                 5.1430 
                 5.1450 
                 5.1450 
                 5.1450 
                 5.1430 
               
               
                 HFOV 
                 46.0000 
                 45.0000 
                 46.0000 
                 45.0000 
                 45.0100 
               
               
                 DFOV 
                 57.2600 
                 58.6500 
                 60.1200 
                 58.4700 
                 57.3300 
               
               
                 f45 
                 33.7940 
                 −58.662 
                 27.9498 
                 69.6337 
                 25.0562 
               
               
                   
               
               
                   
                 Sixth 
                 Seventh 
                 Eighth 
                 Ninth 
                 Tenth 
               
               
                 Element 
                 Embodiment 
                 Embodiment 
                 Embodiment 
                 Embodiment 
                 Embodiment 
               
               
                   
               
               
                 f1 
                 30.8597 
                 26.8100 
                 27.9143 
                 30.3132 
                 30.9647 
               
               
                 f2 
                 −8.9502 
                 −7.4856 
                 −6.9816 
                 −7.4729 
                 −8.0129 
               
               
                 f3 
                 10.5820 
                 9.7570 
                 9.1079 
                 10.5510 
                 7.6032 
               
               
                 f4 
                 6.0407 
                 6.3284 
                 5.5477 
                 5.6949 
                 −5.8534 
               
               
                 f5 
                 −5.8416 
                 −7.3215 
                 −6.0201 
                 −5.9610 
                 6.5574 
               
               
                 f6 
                 293.7318 
                 −219.6987 
                 −288.1368 
                 42.6728 
                 42.2088 
               
               
                 TTL 
                 28.0008 
                 28.0000 
                 28.0000 
                 28.0001 
                 28.0000 
               
               
                 f 
                 10.5609 
                 10.5168 
                 10.3530 
                 10.4413 
                 10.2596 
               
               
                 f number 
                 1.7998 
                 1.9310 
                 1.9310 
                 1.8073 
                 1.6500 
               
               
                 ImgH 
                 5.1430 
                 5.1430 
                 5.1430 
                 5.1430 
                 5.1430 
               
               
                 HFOV 
                 45.0000 
                 45.0000 
                 45.0000 
                 45.0000 
                 46.0000 
               
               
                 DFOV 
                 55.7800 
                 58.7400 
                 59.0200 
                 58.5100 
                 57.1500 
               
               
                 f45 
                 36.2855 
                 28.6208 
                 29.7439 
                 22.8249 
                 54.9889 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 22 
               
               
                   
               
             
            
               
                 Conditional 
                 First 
                 Second 
                 Third 
                 Fourth 
                 Fifth 
               
               
                 Expression 
                 Embodiment 
                 Embodiment 
                 Embodiment 
                 Embodiment 
                 Embodiment 
               
               
                   
               
               
                 D1/HFOV 
                 0.2625 
                 0.2567 
                 0.2984 
                 0.2315 
                 0.2501 
               
               
                 DFOV/f 
                 5.5929 
                 5.5676 
                 5.9307 
                 5.5914 
                 5.4070 
               
               
                 ImgH/TTL 
                 0.1837 
                 0.1590 
                 0.1608 
                 0.1687 
                 0.1911 
               
               
                 TTL/f 
                 2.7349 
                 3.0717 
                 3.1567 
                 2.9165 
                 2.5380 
               
               
                 |f/f3| 
                 1.1005 
                 0.6329 
                 1.5229 
                 0.8164 
                 0.9869 
               
               
                 D1/TTL 
                 0.4312 
                 0.3570 
                 0.4289 
                 0.3416 
                 0.4183 
               
               
                 f2/f3 
                 −0.7758 
                 −2.1369 
                 −1.1391 
                 10.3329 
                 −0.7203 
               
               
                 f4/f5 
                 −0.9987 
                 −1.5965 
                 −0.7970 
                 −1.3477 
                 −0.9343 
               
               
                 ImgH/f 
                 0.5023 
                 0.4884 
                 0.5075 
                 0.4920 
                 0.4851 
               
               
                 (R5 + R6)/(R5 − R6) 
                 −0.2543 
                 −0.5289 
                 −0.2604 
                 0.3226 
                 −0.4142 
               
               
                 (R2 + R6)/(R2 − R6) 
                 0.0428 
                 −0.1750 
                 −0.3171 
                 0.1262 
                 −0.2943 
               
               
                 (Nd1 + Nd3)/2 
                 1.8322 
                 1.5737 
                 1.7778 
                 1.7510 
                 1.7995 
               
               
                 (Nd1 + Nd3 + Nd5)/3 
                 1.8257 
                 1.6358 
                 1.7790 
                 1.7603 
                 1.7970 
               
               
                 (V1 + V2 + V3 + V4)/4 
                 45.1935 
                 60.1965 
                 38.2623 
                 49.9870 
                 45.4195 
               
               
                 SumV/6 
                 44.4783 
                 52.5558 
                 44.4018 
                 46.1772 
                 44.4942 
               
               
                 SumNd/6 
                 1.7242 
                 1.7065 
                 1.7726 
                 1.7481 
                 1.7201 
               
               
                 D12/D23 
                 0.5151 
                 0.6562 
                 0.5811 
                 0.7398 
                 0.2494 
               
               
                   
               
               
                 Conditional 
                 Sixth 
                 Seventh 
                 Eighth 
                 Ninth 
                 Tenth 
               
               
                 Expression 
                 Embodiment 
                 Embodiment 
                 Embodiment 
                 Embodiment 
                 Embodiment 
               
               
                   
               
               
                 D1/HFOV 
                 0.2386 
                 0.2552 
                 0.2490 
                 0.2632 
                 0.3404 
               
               
                 DFOV/f 
                 5.2817 
                 5.5853 
                 5.7008 
                 5.6037 
                 5.5704 
               
               
                 ImgH/TTL 
                 0.1837 
                 0.1837 
                 0.1837 
                 0.1837 
                 0.1837 
               
               
                 TTL/f 
                 2.6514 
                 2.6624 
                 2.7045 
                 2.6817 
                 2.7291 
               
               
                 |f/f3| 
                 0.9980 
                 1.0779 
                 1.1367 
                 0.9896 
                 1.3494 
               
               
                 D1/TTL 
                 0.3834 
                 0.4102 
                 0.4002 
                 0.4229 
                 0.5592 
               
               
                 f2/f3 
                 −0.8458 
                 −0.7672 
                 −0.7665 
                 −0.7083 
                 −1.0539 
               
               
                 f4/f5 
                 −1.0341 
                 −0.8644 
                 −0.9215 
                 −0.9554 
                 −0.8927 
               
               
                 ImgH/f 
                 0.4870 
                 0.4890 
                 0.4968 
                 0.4926 
                 0.5013 
               
               
                 (R5 + R6)/(R5 − R6) 
                 −0.5373 
                 −0.2989 
                 −0.2922 
                 −0.1375 
                 −0.3255 
               
               
                 (R2 + R6)/(R2 − R6) 
                 −0.4091 
                 −0.0734 
                 0.1505 
                 0.3554 
                 0.5207 
               
               
                 (Nd1 + Nd3)/2 
                 1.8252 
                 1.8322 
                 1.8322 
                 1.8322 
                 1.8322 
               
               
                 (Nd1 + Nd3 + Nd5)/3 
                 1.8285 
                 1.8254 
                 1.8371 
                 1.8423 
                 1.7996 
               
               
                 (V1 + V2 + V3 + V4)/4 
                 45.0283 
                 44.6395 
                 42.3168 
                 41.8880 
                 40.0828 
               
               
                 SumV/6 
                 40.6648 
                 43.5157 
                 40.5518 
                 41.8698 
                 44.9780 
               
               
                 SumNd/6 
                 1.7369 
                 1.7175 
                 1.7614 
                 1.7628 
                 1.7193 
               
               
                 D12/D23 
                 0.2730 
                 0.3594 
                 0.2926 
                 0.4855 
                 0.7275 
               
               
                   
               
            
           
         
       
     
     According to the aforementioned embodiments, an imaging lens system which may reduce changes in sizes of lenses and may implement high resolution may be provided. 
     While specific examples have been shown and described above, it will be apparent after an understanding of this disclosure that various changes in form and details may be made in these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be considered in a descriptive sense only, and not for purposes of limitation. Descriptions of features or aspects in each example are to be considered as being applicable to similar features or aspects in other examples. Suitable results may be achieved if the described techniques are performed in a different order, and/or if components in a described system, architecture, device, or circuit are combined in a different manner, and/or replaced or supplemented by other components or their equivalents. Therefore, the scope of the disclosure is defined not by the detailed description, but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents are to be construed as being included in the disclosure.