Patent Publication Number: US-11656431-B2

Title: Imaging lens system and camera module

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims the benefit under 35 USC 119(a) of Korean Patent Application No. 10-2019-0127269, filed on Oct. 14, 2019 with the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes. 
     BACKGROUND 
     1. Field 
     The following description relates to a camera module capable of varying an optical axis length and a lens imaging system mountable in such a camera module. 
     2. Description of Background 
     A portable terminal commonly includes a camera module. For example, a portable wireless terminal may include one or more camera modules. Each camera module may have a predetermined size. For example, a camera module may have a size corresponding to a distance from a lens closest to an object to an image side surface (or an image sensor), known as a total track length (TTL). The TTL of the camera module is usually proportional to a focal length. For example, a camera module for near-distance imaging may have a shorter TTL than a conventional camera module. As another example, a camera module for long-distance imaging may have a longer TTL than a conventional camera module. However, since the portable wireless terminal has a limited installation space, it may be difficult to mount a camera module for long-distance imaging or a camera module capable of magnification control of an image (a zoom-enabled camera module). 
     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. 
     A lens imaging system capable of long-distance imaging while being mounted on a portable terminal, and a camera module including the same. 
     In one general aspect, a camera module includes: a first lens having positive refractive power; a second lens having refractive power, a third lens having positive refractive power, and having a concave shape on an image side surface; a fourth lens having negative refractive power; and a fifth lens having refractive power. TTL, a distance from an object side surface of the first lens to an imaging surface, and BFL, a distance from an image side surface of the fifth lens to the imaging surface, satisfies 1.0&lt;TTL/BFL&lt;3.0. 
     The first lens may have a convex image-side surface. 
     The third lens may have a convex object-side surface. 
     The fifth lens may have a concave image-side surface. 
     A radius of curvature of an image side surface of the first lens L1 R2 and a focal length f of the lens imaging system may satisfy −10&lt;L1R2/f&lt;−2.0. 
     A radius of curvature of the object-side surface of the first lens L1 R1 and a radius of curvature of an image-side surface of the first lens L1 R2 may satisfy −2.0&lt;(L1R1+L1R2)/(L1R1−L1R2)&lt;−0.1. 
     A radius of curvature of an image side surface of the second lens L2R2 and a focal length f of the lens imaging system may satisfy 0.1&lt;L2R2/f&lt;2.0. 
     A radius of curvature of an object side surface of the second lens L2R1 and a radius of curvature of an image side surface of the second lens L2R2 may satisfy 0.1&lt;(L2R1+L2R2)/(L2R1−L2R2)&lt;5.0. 
     The BFL and a diagonal length 2 lmgHT of the imaging surface may satisfy 1.0&lt;BFL/2 lmgHT. 
     A total field of view (FOV) may be 35 degrees or less. 
     A focal length f of the lens imaging system and a diagonal length 2 lmgHT of the imaging surface may satisfy 1.6&lt;f/2 lmgHT. 
     The fifth lens may have positive refractive power. 
     In another general aspect, a camera module includes a first barrel including a lens imaging system; and a second barrel coupled to the first barrel, and including an image sensor. The first barrel is accommodated inside the second barrel in an optical axis direction of the lens imaging system. 
     The lens imaging system may include a first lens having positive refractive power; a second lens having refractive power; a third lens having positive refractive power, and including a concave image-side surface; a fourth lens having negative refractive power; and a fifth lens having refractive power. TTL, a distance from an object-side surface of the first lens to an imaging surface, and BFL, a distance from an image-side surface of the fifth lens to the imaging surface, may satisfy 1.0&lt;TTL/BFL&lt;3.0. 
     A length of the first barrel in the optical axis direction may be greater than a distance from the object side surface of the first lens to the image side surface of the fifth lens. 
     In another general aspect, a camera module includes a first lens barrel; a second lens barrel coupled to an image side of the first barrel; a lens imaging system accommodated within the first lens barrel and the second lens barrel; and a third lens barrel including an image sensor, and accommodating the first lens barrel and the second lens barrel therein. The lens imaging system includes a first lens having refractive power; a second lens having refractive power; a third lens having refractive power; a fourth lens having refractive power; and a fifth lens having refractive power. TTL, a distance from an object-side surface of the first lens to an imaging surface, and BFL, a distance from an image-side surface of the fifth lens to the imaging surface, satisfies 1.0&lt;TTL/BFL&lt;3.0. 
     The first lens, the second lens, and the third lens may be accommodated in the first lens barrel, and the fourth lens and the fifth lens may be accommodated in the second lens barrel. 
     A length of the first lens barrel in an optical axis direction may be greater than a distance from the object-side surface of the first lens to an image-side surface of the third lens. 
     A length of the second lens barrel in an optical axis direction may be greater than a distance from an object-side surface of the fourth lens to the image-side surface of the fifth lens. 
     A length of the third lens barrel in an optical axis direction may be greater than BFL. 
     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 configuration diagram of a lens imaging system according to an example. 
         FIG.  2    is a configuration diagram of a camera module including the lens imaging system illustrated in  FIG.  1   . 
         FIG.  3    is a storage state diagram of the camera module illustrated in  FIG.  2   . 
         FIG.  4    is a configuration diagram of a lens imaging system according to another example. 
         FIG.  5    is a configuration diagram of a camera module including the lens imaging system illustrated in  FIG.  4   . 
         FIGS.  6 A and  6 B  are storage state diagrams of the camera module illustrated in  FIG.  5   . 
         FIG.  7    is a configuration diagram of a lens imaging system according to another example. 
         FIG.  8    is a configuration diagram of a camera module including the lens imaging system illustrated in  FIG.  7   . 
         FIGS.  9 A and  9 B  are storage state diagrams of the camera module illustrated in  FIG.  8   . 
     
    
    
     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 size, proportions, and depiction of elements in the drawings may be exaggerated for clarity, illustration, and convenience. 
     DETAILED DESCRIPTION 
     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 to one of ordinary skill in the art. 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 to one of ordinary skill in the art, with the exception of operations necessarily occurring in a certain order. Also, descriptions of functions and constructions that would be well known to one of ordinary skill 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 so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to one of ordinary skill in the art. 
     Herein, it is noted that use of the term “may” with respect to an example or embodiment, e.g., as to what an example or embodiment may include or implement, means that at least one example or embodiment exists in which such a feature is included or implemented while all examples and embodiments are not limited thereto. 
     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 can 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. 
     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,” and “lower” 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 will 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 (for example, 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. 
     The features of the examples described herein may be combined in various ways as will be apparent after an understanding of the disclosure of this application. Further, although the examples described herein have a variety of configurations, other configurations are possible as will be apparent after an understanding of the disclosure of this application. 
     Hereinafter, examples will be described as follows with reference to the attached drawings. 
     Herein, a first lens refers to a lens closest to an object (or a subject), and a fifth lens refers to a lens closest to an imaging surface (or an image sensor). Herein, a unit of a curvature of radius, a thickness, TTL, 2 lmgHT (a diagonal length of the imaging surface), and a focal length of the lens may be in millimeters (mm). In addition, the thickness of the lens, an interval between the lenses, and the TTL is a distance from an optical axis of the lens. In addition, in an explanation of a shape of each lens, a convex shape on one surface may mean an optical axis portion of the surface is convex, and a concave shape of one surface may mean an optical axis portion of the surface is concave. Therefore, even when one surface of the lens is described as having a convex shape, an edge portion of the lens may be concave. Similarly, even when one surface of the lens is described as having a concave shape, an edge portion of the lens may be convex. 
     The lens imaging system includes an optical system comprised of a plurality of lenses. For example, the optical system of the lens imaging system is comprised of a plurality of lenses having refractive power. However, the lens imaging system is not comprised of only lenses having refractive power. For example, the lens imaging system may include a stop ST for adjusting an amount of light. In addition, the lens imaging system may include an infrared cut filter for blocking infrared rays. In addition, the lens imaging system may further include an image sensor (i.e., an imaging device) for converting an image of a subject incident through the optical system into an electrical signal. In addition, the lens imaging system may further include a gap maintenance member for adjusting the distance between the lens and the lens. 
     A plurality of lenses is made of materials having different refractive indexes from air. For example, the plurality of lenses is made of plastic or glass materials. At least one of the plurality of lenses has an aspherical shape. The aspherical surface of the lens is represented by Equation 1 below. 
     
       
         
           
             
               
                 
                   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 lens, k is a conical constant, r is a distance from any point on an aspherical surface to an optical axis, A through J are aspherical surface constants, and Z (or SAG) is a height in an optical axis direction from any point on an aspheric surface to an apex of the aspheric surface. 
     The lens imaging system includes five or more lenses. For example, the lens imaging system includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, sequentially disposed from an object side. 
     The first lens to the fifth lens may be disposed at intervals from neighboring lenses. For example, an image side surface of the first lens may not contact an object side surface of the second lens, and an image side surface of the second lens may not contact an object side surface of the third lens. 
     The first lens has predetermined refractive power. For example, the first lens may have positive refractive power. The first lens has a convex shape on one surface. For example, the first lens may have a convex shape on an image side surface. The first lens has a predetermined refractive index. For example, the first lens may have a refractive index of 1.6 or more. The first lens has a predetermined focal length. For example, the focal length of the first lens may be in a range of 7.0 to 9.0 mm. 
     The second lens has predetermined refractive power. For example, the second lens may have negative refractive power. The second lens has a concave shape on one surface. For example, the second lens may have a concave shape on an image side surface. The second lens has a predetermined refractive index. For example, the second lens may have a refractive index of 1.0 or more and less than 1.6. The second lens has a predetermined focal length. For example, the focal length of the second lens may be in a range of −10 to −7.0 mm. 
     The third lens has predetermined refractive power. For example, the third lens has a concave shape on one surface. For example, the third lens may have a concave shape on an image side surface. The third lens has a predetermined refractive index. For example, the third lens may have a refractive index of 1.6 or more and less than 1.8. The third lens has a predetermined focal length. The focal length of the third lens may be in a range of 30 to 100 mm. 
     The fourth lens has predetermined refractive power. For example, the fourth lens may have negative refractive power. The fourth lens has a convex shape on one surface. For example, the fourth lens may have a convex shape on an image side surface. The fourth lens has a predetermined refractive index. For example, the fourth lens may have a refractive index of 1.6 or more and less than 1.8. The fourth lens has a predetermined focal length. For example, the focal length of the fourth lens may be in a range of −30 to −15 mm. 
     The fifth lens has predetermined refractive power. For example, the fifth lens may have positive or negative refractive power. The fifth lens may have a concave shape on one surface. For example, the fifth lens may have a concave shape on an image side surface. The fifth lens has predetermined refractive power. For example, the fifth lens may have refractive power of 1.5 or more and less than 1.8. The fifth lens has a predetermined focal length. For example, the focal length of the fifth lens may be in a range of 12 to 24 mm. 
     The lens imaging system includes a lens of a plastic material. For example, in the lens imaging system, at least one of five or more lenses constituting a lens group may be made of a plastic material. 
     The lens imaging system includes an aspherical lens. For example, in the lens imaging system, at least one of five or more lenses constituting the lens group may be an aspherical lens. 
     The lens imaging system may include a filter, a stop, and an image sensor. 
     The filter is disposed between a lens disposed closest to the imaging surface and the image sensor. The filter blocks some wavelengths of light from incident light to improve a resolution of the lens imaging system. For example, the filter may block infrared light wavelengths of the incident light. The stop maybe disposed between the third lens and the fourth lens. 
     The lens imaging system may satisfy one or more of the following conditional expressions:
 
1.0&lt;TTL/BFL&lt;3.0;
 
−10.0&lt; L 1 R 2/ f&lt;− 2.0;
 
−2.0&lt;( L 1 R 1+ L 1 R 2)/( L 1 R 1 −L 1 R 2)&lt;−0.1;
 
0.1&lt; L 2 R 2/ f&lt; 2.0;
 
0.1&lt;( L 2 R 1+ L 2 R 2)/( L 2 R 1 −L 2 R 2)&lt;5.0;
 
0.1&lt; f/f 1&lt;5.0;
 
0.1&lt; f/f 3&lt;2.0;
 
−2.0&lt; f/f 4&lt;−0.1; and
 
0.1&lt; f/f 5&lt;2.0,
 
     where TTL is a distance from an object side surface of the first lens to an imaging surface, BFL is a distance from an image side surface of the fifth lens to an imaging surface, f is a focal length of the lens imaging system, L1R1 is a radius of curvature of the object side surface of the first lens, L1 R2 is a radius of curvature of the image side surface of the first lens, L2R1 is a radius of curvature of the object side surface of the second lens, L2R2 is a radius of curvature of the image side surface of the second surface, f1 is a focal length of the first lens, f3 is a focal length of the third lens, f4 is a focal length of the fourth lens, and f5 is a focal length of the fifth lens. 
     In addition, the lens imaging system may further satisfy one or more the following conditional expressions:
 
1.0&lt; BFL/ 2  lmgHT;  
 
1.6&lt; f/ 2  lmgHT;  
 
1.0&lt; TTL/f&lt; 1.2;
 
0.8&lt;( TTL−BFL )/ BFL&lt; 1.1;
 
 D 23/ D 34&lt;1;
 
T5&lt;T4&lt;T1;
 
max(|1/ f 2|,|1/ f 3|,|1/ f 4|,|1/ f 5|)&lt;|1/ f 1|; and
 
FOV&lt;35,
 
     where 2 lmgHT is a diagonal length of the imaging surface, D 23  is a distance from the image side surface of the second lens to the object side surface of the third lens, D 34  is a distance from the image side surface of the third lens to the object side surface of the fourth lens, T1 is a thickness at a center of an optical axis of the first lens, T4 is a thickness at a center of an optical axis of the fourth lens, T5 is a thickness at a center of an optical axis of the fifth lens, max( ) indicates the largest value listed in parentheses, and FOV is a total field of view of the lens imaging system. 
     Next, a lens imaging system according to various examples will be described. 
     A lens imaging system according to a first example will be described with reference to  FIG.  1   . 
     A lens imaging system  100  includes a first lens  110 , a second lens  120 , a third lens  130 , a fourth lens  140 , and a fifth lens  150 . 
     The first lens  110  has positive refractive power. The first lens  110  has a convex shape on an object side surface and a convex shape on an image side surface. The second lens  120  has negative refractive power. The second lens  120  has a convex shape on an object side surface and a concave shape on an image side surface. The third lens  130  has positive refractive power. The third lens  130  has a convex shape on an object side surface and a concave shape on an image side surface. The fourth lens  140  has negative refractive power. The fourth lens  140  has a concave shape on an object side surface and a convex shape on an image side surface. The fifth lens  150  has positive refractive power. The fifth lens  150  has a convex shape on an object side surface and a concave shape on an image side surface. 
     The first lens  110  may be the thickest lens in the lens imaging system  100 . For example, the thickness at the center of the first lens  110  along the optical axis may be greater than the thickness at the center of the second lens  120  to the fifth lens  150  along the optical axis. 
     The lens imaging system  100  may include a filter  170  and an image sensor  180 . The filter  170  is disposed between the fifth lens  150  and the image sensor  180 . The filter  170  is configured to block light of a specific wavelength from incident light. The image sensor  180  is disposed on an image side of the filter  170 . The image sensor  180  is configured to convert an optical signal into an electrical signal. 
     Table 1 shows lens characteristics of the lens imaging system  100 , and Table 2 shows aspherical values of the lens imaging system  100 . 
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 1 
               
               
                   
               
               
                   
                   
                 Radius  
                   
                   
                 Re-  
                   
               
               
                 Surface  
                 Refer-  
                 of  
                 Thickness/  
                 Focal  
                 fractive  
                 Abbe  
               
               
                 No.  
                 ence  
                 curvature  
                 distance  
                 length  
                 index  
                 number 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 0  
                 Object  
                 infinity  
                 infinity  
                   
                   
                   
               
               
                 1  
                 First  
                 4.450  
                 1.61828  
                 7.93099  
                 1.5350  
                 56.00  
               
               
                   
                 lens  
                   
                   
                   
                   
                   
               
               
                 2  
                   
                 −85.103  
                 0.06000  
                   
                   
                   
               
               
                 3  
                 Second  
                 9.340  
                 1.12000  
                 −8.85139  
                 1.6150  
                 25.90  
               
               
                   
                 lens  
                   
                   
                   
                   
                   
               
               
                 4  
                   
                 3.300  
                 1.00000  
                   
                   
                   
               
               
                 5  
                 Third  
                 17.950  
                 0.58349  
                 35.85586  
                 1.6600  
                 20.40  
               
               
                   
                 lens  
                   
                   
                   
                   
                   
               
               
                 6  
                   
                 70.482  
                 1.60000  
                   
                   
                   
               
               
                 7  
                 Fourth  
                 −3.300  
                 1.40000  
                 −19.29506  
                 1.6150  
                 25.90  
               
               
                   
                 lens  
                   
                   
                   
                   
                   
               
               
                 8  
                   
                 −5.190  
                 0.04000  
                   
                   
                   
               
               
                 9  
                 Fifth  
                 3.651  
                 1.20000  
                 17.36149  
                 1.5350  
                 56.00  
               
               
                   
                 lens  
                   
                   
                   
                   
                   
               
               
                 10  
                   
                 5.199  
                 7.20242  
                   
                   
                   
               
               
                 11  
                 Filter  
                 infinity  
                 0.11000  
                   
                 1.5441  
                 56.00  
               
               
                 12  
                   
                 infinity  
                 0.87054  
                   
                   
                   
               
               
                 13  
                 Imaging  
                 infinity  
                 0.00020  
                   
                   
                   
               
               
                   
                 surface 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
               
               
               
               
               
             
               
                 TABLE 2 
               
               
                   
               
               
                 Sur-  
                   
                   
                   
                   
                   
                   
                   
                   
                   
                   
               
               
                 face  
                   
                   
                   
                   
                   
                   
                   
                   
                   
                   
               
               
                 No.  
                 K  
                 A  
                 B  
                 C  
                 D  
                 E  
                 F  
                 G  
                 H  
                 I 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
               
               
            
               
                 1  
                 −0.61556653  
                 0.000838186  
                 2.08291E−05  
                  4.32584E−06  
                 −4.64091E−07  
                  3.62323E−08  
                 0  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00  
               
               
                 2  
                  0.00E+00  
                  6.22E−05  
                  −5.78E−06  
                  3.53684E−06  
                 −4.65702E−07  
                   2.8652E−08  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00  
               
               
                 3  
                  0.00E+00  
                 −4.04E−03  
                 7.95822E−05  
                  9.36203E−07  
                 −2.07702E−07  
                 0  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00  
               
               
                 4  
                  0.00E+00  
                 −5.30E−03  
                 0.00016213  
                 −1.30902E−05  
                 −4.56916E−06  
                 0  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00  
               
               
                 5  
                  0.00E+00  
                  1.57E−03  
                 0.001414701  
                 −0.000284243  
                 2.44754E−05  
                 0  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00  
               
               
                 6  
                  0.00E+00  
                  3.74E−04  
                 −0.001382994  
                 −0.000620431  
                 8.74698E−05  
                 −6.52082E−06  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00  
               
               
                 7  
                  0.00E+00  
                  2.19E−02  
                 −0.005259913  
                 0.000825143  
                 −5.50761E−05  
                 −3.51393E−06  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00  
               
               
                 8  
                 −5.40E+00  
                  1.97E−03  
                 −0.000675279  
                 0.00025125  
                 −7.31796E−06  
                 −1.39381E−06  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00  
               
               
                 9  
                  0.00E+00  
                 −1.41E−02  
                 0.001855935  
                 −6.50915E−05  
                 −4.06056E−06  
                  2.54792E−07  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00  
               
               
                 10  
                  0.00E+00  
                 −7.08E−03  
                 0.000840088  
                 −4.19774E−05  
                 8.41651E−06  
                 −3.04125E−07  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00 
               
               
                   
               
            
           
         
       
     
     A camera module including the lens imaging system  100  will be described with reference to  FIGS.  2  and  3   . 
     A camera module  10  includes the lens imaging system  100  and lens barrels  20  and  30 . However, the configuration of the camera module  10  is not limited to the lens imaging system  100  and the lens barrels  20  and  30 . For example, the camera module  10  may further include a driving mechanism for driving the lens imaging system  100  or the lens barrels  20  and  30 . 
     The lens barrels  20  and  30  may be configured in plural. For example, the lens barrels  20  and  30  may be comprised of the first lens barrel  20  and the second lens barrel  30 . The first lens barrel  20  is configured to accommodate a partial configuration of the lens imaging system  100 . For example, the first lens barrel  20  may be configured to accommodate the lenses  110 ,  120 ,  130 ,  140 , and  150  of the lens imaging system  100 . The first lens barrel  20  has a predetermined length BL 1 . For example, the length BL 1  of the first lens barrel  20  may be greater than a distance D 16  from the object side surface of the first lens  110  to the image side surface of the fifth lens  150 . The second lens barrel  30  is configured to accommodate a remaining configuration of the lens imaging system  100 . For example, the second lens barrel  30  may be configured to accommodate the filter  170  and the image sensor  180  of the lens imaging system  100 . The second lens barrel  30  has a predetermined length BL 2 . For example, the length BL 2  of the second lens barrel  30  may be greater than the distance BFL from the image side surface of the fifth lens to the imaging surface of the image sensor  180 . 
     The first lens barrel  20  may be accommodated inside the second lens barrel  30 . For example, the first lens barrel  20  may be completely accommodated in the second lens barrel  30  as shown in  FIG.  3    so that an overall height of the camera module  10  may be reduced. A protrusion  22  and a guide groove  32  are formed in the first lens barrel  20  and the second lens barrel  30 , respectively. For example, one or more protrusions  22  are formed on an outer circumferential surface of the first lens barrel  20 , and the same number of guide grooves  32  are formed on an inner circumferential surface of the second lens barrel  30 . The guide groove  32  is formed to be elongated in a longitudinal direction of the second lens barrel  30 . The protrusion  22  of the first lens barrel  20  is fitted into the guide groove  32  of the second lens barrel  30 . 
     The first lens barrel  20  and the second lens barrel  30  may be coupled to each other by the protrusion  22  and the guide groove  32 . The first lens barrel  20  may move in the optical axis direction along the inner circumferential surface of the second lens barrel  30 . For example, the first lens barrel  20  may freely move in the optical axis direction through the protrusion  22  coupled with the guide groove  32 . 
     The camera module  10  configured as described above may be easily mounted to the portable terminal since the height of the camera module  10  is adjusted by the plurality of lens barrels  20  and  30 . 
     A lens imaging system according to a second example will be described with reference to  FIG.  4   . 
     A lens imaging system  200  includes a first lens  210 , a second lens  220 , a third lens  230 , a fourth lens  240 , and a fifth lens  250 . 
     The first lens  210  has positive refractive power. The first lens  210  has a convex shape on an object side surface and a convex shape on an image side surface. The second lens  220  has negative refractive power. The second lens  220  has a convex shape on an object side surface and a concave shape on an image side surface. The third lens  230  has positive refractive power. The third lens  230  has a convex shape on an object side surface and a concave shape on an image side surface. The fourth lens  240  has negative refractive power. The fourth lens  240  has a concave shape on an object side surface and a convex shape on an image side surface. The fifth lens  250  has positive refractive power. The fifth lens  250  has a convex shape on an object side surface and a concave shape on an image side surface. 
     The first lens  210  may be the thickest lens in the lens imaging system  200 . For example, the thickness at the center of the first lens  210  along the optical axis may be greater than the thickness at the center of the second lens  220  to the fifth lens  250  along the optical axis. 
     The lens imaging system  200  may include a filter  270  and an image sensor  280 . The filter  270  is disposed between the fifth lens  250  and the image sensor  280 . The filter  270  is configured to block light of a specific wavelength from incident light. For example, the filter may be configured to block light of infrared wavelengths. The image sensor  280  is disposed on the image side of the filter  270 . The image sensor  280  is configured to convert an optical signal into an electrical signal. 
     Table 3 shows lens characteristics of the lens imaging system  200 , and Table 4 shows aspherical values of the lens imaging system  200 . 
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 3 
               
               
                   
               
               
                   
                   
                 Radius  
                   
                   
                 Re-  
                   
               
               
                 Surface  
                 Refer-  
                 of  
                 Thickness/  
                 Focal  
                 fractive  
                 Abbe  
               
               
                 No.  
                 ence  
                 curvature  
                 distance  
                 length  
                 index  
                 number 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 0  
                 Object  
                 infinity  
                 infinity  
                   
                   
                   
               
               
                 1  
                 First  
                 4.459  
                 1.84752  
                 7.98272  
                 1.5350  
                 56.00  
               
               
                   
                 lens  
                   
                   
                   
                   
                   
               
               
                 2  
                   
                 −92.924  
                 0.06000  
                   
                   
                   
               
               
                 3  
                 Second  
                 9.434  
                 1.11825  
                 −8.79211  
                 1.6150  
                 25.90  
               
               
                   
                 lens  
                   
                   
                   
                   
                   
               
               
                 4  
                   
                 3.300  
                 1.00000  
                   
                   
                   
               
               
                 5  
                 Third  
                 25.068  
                 0.55279  
                 46.09704  
                 1.6600  
                 20.40  
               
               
                   
                 lens  
                   
                   
                   
                   
                   
               
               
                 6  
                   
                 133.042  
                 1.60000  
                   
                   
                   
               
               
                 7  
                 Fourth  
                 −3.300  
                 1.40000  
                 21.86904  
                 1.6150  
                 25.90  
               
               
                   
                 lens  
                   
                   
                   
                   
                   
               
               
                 8  
                   
                 −4.944  
                 0.04000  
                   
                   
                   
               
               
                 9  
                 Fifth  
                 3.690  
                 1.15477  
                 17.19018  
                 1.5350  
                 56.00  
               
               
                   
                 lens  
                   
                   
                   
                   
                   
               
               
                 10  
                   
                 5.336  
                 7.20242  
                   
                   
                   
               
               
                 11  
                 Filter  
                 infinity  
                 0.11000  
                   
                 1.5441  
                 56.00  
               
               
                 12  
                   
                 infinity  
                 0.76999  
                   
                   
                   
               
               
                 13  
                 Imaging  
                 infinity  
                 0.00154  
                   
                   
                   
               
               
                   
                 surface 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
               
               
               
               
               
             
               
                 TABLE 4 
               
               
                   
               
               
                 Surface  
                   
                   
                   
                   
                   
                   
                   
                   
                   
                   
               
               
                 No.  
                 K  
                 A  
                 B  
                 C  
                 D  
                 E  
                 F  
                 G  
                 H  
                 I 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
               
               
            
               
                 1  
                 −0.61719  
                 0.000834  
                 2.29E−05  
                 3.42E−06  
                 −3.26E−07  
                 2.57E−08  
                 0.00E+00  
                 0.00E+00  
                 0  
                 0  
               
               
                 2  
                 0  
                 6.36E−05  
                 −5.48E−06  
                 3.86E−06  
                 −5.93E−07  
                 3.83E−08  
                 0.00E+00  
                 0.00E+00  
                 0  
                 0  
               
               
                 3  
                 0  
                 −0.00402  
                 0.000139  
                 −8.18E−06  
                 2.67E−07  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00  
                 0  
                 0  
               
               
                 4  
                 0  
                 −0.00538  
                 0.000447  
                 −3.21E−05  
                 −3.62E−06  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00  
                 0  
                 0  
               
               
                 5  
                 0  
                 0.000891  
                 0.002096  
                 −0.0004  
                 3.31E−05  
                 0.00E+00  
                 0.00E+00  
                 0.00E+00  
                 0  
                 0  
               
               
                 6  
                 0  
                 0.000369  
                 0.001905  
                 −0.00071  
                 9.12E−05  
                 −6.74E−06  
                 0.00E+00  
                 0.00E+00  
                 0  
                 0  
               
               
                 7  
                 0  
                 0.021828  
                 −0.00568  
                 0.001048  
                 −9.85E−05  
                 −9.86E−07  
                 0.00E+00  
                 0.00E+00  
                 0  
                 0  
               
               
                 8  
                 −4.42031  
                 0.001103  
                 −0.0006  
                 0.000276  
                 −1.84E−05  
                 −4.72E−07  
                 0.00E+00  
                 0.00E+00  
                 0  
                 0  
               
               
                 9  
                 0  
                 −0.01472  
                 0.002374  
                 −0.00016  
                 3.23E−06  
                 5.72E−08  
                 0.00E+00  
                 0.00E+00  
                 0  
                 0  
               
               
                 10  
                 0  
                 −0.00666  
                 8.35E−04  
                 −2.38E−05  
                 5.08E−06  
                 −1.68E−07  
                 0.00E+00  
                 0.00E+00  
                 0  
                 0 
               
               
                   
               
            
           
         
       
     
     Next, a camera module including the lens imaging system  200  will be described with reference to  FIGS.  5 ,  6 A, and  6 B . 
     The camera module  12  includes a lens imaging system  200  described above and lens barrels  20 ,  30 , and  40 . However, the configuration of the camera module  12  is not limited to the lens imaging system  200  and the lens barrels  20 ,  30 , and  40 . For example, the camera module  12  may further include a driving mechanism for driving the lens imaging system  200  or the lens barrels  20 ,  30 , and  40 . 
     The lens barrels  20 ,  30 , and  40  may be configured in plural. For example, the lens barrels  20 ,  30 , and  40  may be comprised of the first lens barrel  20 , the second lens barrel  30 , and the third lens barrel  40 . The first lens barrel  20  may be configured to accommodate a partial configuration of the lens imaging system  200 . For example, the first lens barrel  20  may be configured to accommodate lenses  210 ,  220 , and  230  of the lens imaging system  200 . The first lens barrel  20  has a predetermined length BL 1 . For example, the length BL 1  of the first lens barrel  20  may be greater than a distance D 13  from the object side surface of the first lens  210  to the image side surface of the third lens  230 . The second lens barrel  30  is configured to accommodate the remaining lenses of the lens imaging system  200 . For example, the second lens barrel  30  may be configured to accommodate the fourth lens  240  and the fifth lens  250 . The second lens barrel  30  has a predetermined length BL 2 . For example, the length BL 2  of the second lens barrel  30  may be greater than a distance D 45  from the object side surface of the fourth lens  240  to the image side surface of the fifth lens  250 . The third lens barrel  40  may accommodate the remaining configurations of the lens imaging system  200 . For example, the third lens barrel  40  may be configured to accommodate the filter  170  and the image sensor  180  of the lens imaging system  200 . The third lens barrel  40  has a predetermined length BL 3 . For example, the length BL 3  of the third lens barrel  40  may be greater than a distance BFL from the image side surface of the fifth lens  250  to an imaging surface of the image sensor  280 . 
     The first lens barrel  20  and the second lens barrel  30  are configured to be accommodated in the third lens barrel  40 . For example, the first lens barrel  20  and the second lens barrel  30  may be completely accommodated inside the third lens barrel  40  in an inactive state of the camera module  12 . 
     Optionally, the second lens barrel  30  may be configured to be disposed outwardly of the third lens barrel  40 . For example, the second lens barrel  30  may be disposed outwardly of the third lens barrel  40  through an opening  42  of the third lens barrel  40 . The opening  42  is formed on one side of the third lens barrel  40 . The third lens barrel  40  may include a cover  44  for selectively opening and closing the opening  42 . The cover  44  may be coupled to the third lens barrel  40  by a hinge member  48 . 
     A lens imaging system according to a third example will be described with reference to  FIG.  7   . 
     A lens imaging system  300  include a first lens  310 , a second lens  320 , a third lens  330 , a fourth lens  340 , and a fifth lens  350 . 
     The first lens  310  has positive refractive power. The first lens  310  has a convex shape on an object side surface and a convex shape on an image side surface. The second lens  320  has negative refractive power. The second lens  320  has a convex shape on an object side surface and a concave shape on an image side surface. The third lens  330  has positive refractive power. The third lens  330  has a convex shape on an object side surface and a concave shape on an image side surface. The fourth lens  340  has negative refractive power. The fourth lens  340  has a concave shape on an object side surface and a convex shape on an image side surface. The fifth lens  350  has positive refractive power. The fifth lens  350  has a convex shape on an object side surface and a concave shape on an image side surface. 
     The first lens  310  may be the thickest lens in the lens imaging system  300 . For example, the thickness at a center of the first lens  310  along the optical axis may be greater than the thickness of the second lens  320  to the fifth lens  350  at a center along the optical axis. 
     The lens imaging system  300  may include a filter  370  and an image sensor  380 . The filter  370  is disposed between the fifth lens  350  and the image sensor  380 . The filter  370  is configured to block light of a specific wavelength from incident light. For example, the filter  370  may be configured to block light of infrared wavelengths. The image sensor  380  is disposed on an image side of the filter  370 . The image sensor  380  is configured to convert an optical signal into an electrical signal. 
     Table 5 shows lens characteristics of the lens imaging system  300 , and Table 6 shows aspherical values of the lens imaging system  300 . 
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 5 
               
               
                   
               
               
                   
                   
                 Radius  
                   
                   
                 Re-  
                   
               
               
                 Surface  
                 Refer-  
                 of  
                 Thickness/  
                 Focal  
                 fractive  
                 Abbe  
               
               
                 No.  
                 ence  
                 curvature  
                 distance  
                 length  
                 index  
                 number 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 0  
                 Object  
                 infinity  
                 infinity  
                   
                   
                   
               
               
                 1  
                 First  
                 4.463  
                 1.94240  
                 8.04964  
                 1.5350  
                 56.00  
               
               
                   
                 lens  
                   
                   
                   
                   
                   
               
               
                 2  
                   
                 −113.792  
                 0.04374  
                   
                   
                   
               
               
                 3  
                 Second  
                 8.755  
                 1.06248  
                 −9.22173  
                 1.6150  
                 25.90  
               
               
                   
                 lens  
                   
                   
                   
                   
                   
               
               
                 4  
                   
                 3.300  
                 1.00000  
                   
                   
                   
               
               
                 5  
                 Third  
                 26.295  
                 0.52045  
                 88.81893  
                 1.6600  
                 20.40  
               
               
                   
                 lens  
                   
                   
                   
                   
                   
               
               
                 6  
                   
                 46.871  
                 1.60000  
                   
                   
                   
               
               
                 7  
                 Fourth  
                 −3.300  
                 1.40000  
                 −25.88373  
                 1.6150  
                 25.90  
               
               
                   
                 lens  
                   
                   
                   
                   
                   
               
               
                 8  
                   
                 −4.723  
                 0.04000  
                   
                   
                   
               
               
                 9  
                 Fifth  
                 3.703  
                 1.18153  
                 17.46759  
                 1.5350  
                 56.00  
               
               
                   
                 lens  
                   
                   
                   
                   
                   
               
               
                 10  
                   
                 5.312  
                 7.26707  
                   
                   
                   
               
               
                 11  
                 Filter  
                 infinity  
                 0.11000  
                   
                 1.5441  
                 56.00  
               
               
                 12  
                   
                 infinity  
                 0.73945  
                   
                   
                   
               
               
                 13  
                 Imaging  
                 infinity  
                 0.00055  
                   
                   
                   
               
               
                   
                 surface 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
               
               
               
               
               
             
               
                 TABLE 6 
               
               
                   
               
               
                 Surface  
                   
                   
                   
                   
                   
                   
                   
                   
                   
                   
               
               
                 No.  
                 K  
                 A  
                 B  
                 C  
                 D  
                 E  
                 F  
                 G  
                 H  
                 I 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
               
               
            
               
                 1  
                 −0.61371  
                 0.000831  
                 3.13E−05  
                 2.88E−06  
                 −3.61E−07  
                 3.96E−08  
                 0.00E+00  
                 0.00E+00  
                 0  
                 0  
               
               
                 2  
                 0  
                 8.96E−05  
                 4.59E−06  
                 3.74E−06  
                 −7.67E−07  
                 7.15E−08  
                 0.00E+00  
                 0  
                 0  
                 0  
               
               
                 3  
                 0  
                 −0.00398  
                 0.000133  
                 −1.00E−05  
                 4.31E−07  
                 0.00E+00  
                 0.00E+00  
                 0  
                 0  
                 0  
               
               
                 4  
                 0  
                 −0.00522  
                 0.000513  
                 −6.36E−05  
                 1.26E−06  
                 0.00E+00  
                 0.00E+00  
                 0  
                 0  
                 0  
               
               
                 5  
                 0  
                 0.000659  
                 0.00261  
                 −6.26E−04  
                 6.66E−05  
                 0.00E+00  
                 0.00E+00  
                 0  
                 0  
                 0  
               
               
                 6  
                 0  
                 0.000396  
                 0.002585  
                 −9.87E−04  
                 1.25E−04  
                 −5.35E−06  
                 0.00E+00  
                 0  
                 0  
                 0  
               
               
                 7  
                 0  
                 0.02093  
                 −0.00506  
                 8.04E−04  
                 −6.69E−05  
                 −8.87E−07  
                 0.00E+00  
                 0  
                 0  
                 0  
               
               
                 8  
                 −3.83206  
                 0.000683  
                 −0.00048  
                 0.000182  
                 −4.13E−06  
                 −9.41E−07  
                 0.00E+00  
                 0  
                 0  
                 0  
               
               
                 9  
                 0  
                 −0.01398  
                 0.00217  
                 −0.00015  
                 3.68E−06  
                 2.01E−08  
                 0.00E+00  
                 0  
                 0  
                 0  
               
               
                 10  
                 0  
                 −0.00653  
                 0.000817  
                 −1.81E−05  
                 2.57E−06  
                 8.59E−08  
                 0.00E+00  
                 0  
                 0  
                 0 
               
               
                   
               
            
           
         
       
     
     Table 7 shows optical property values of the lens imaging system according to the first to third examples. 
     
       
         
           
               
               
               
               
               
             
               
                   
                 TABLE 7 
               
               
                   
                   
               
               
                   
                   
                 First 
                 Second 
                 Third 
               
               
                   
                 Reference 
                 example 
                 example 
                 example 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 TTL 
                 16.805 
                 16.857 
                 16.908 
               
               
                   
                 BFL 
                 8.183 
                 8.084 
                 8.117 
               
               
                   
                 f 
                 15.00 
                 15.00 
                 15.00 
               
               
                   
                 F-number 
                 2.800 
                 2.800 
                 2.800 
               
               
                   
                 2ImgHT 
                 8.000 
                 8.000 
                 8.000 
               
               
                   
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
             
               
                 TABLE 8 
               
               
                   
               
               
                   
                 First 
                 Second 
                 Third 
               
               
                 Conditional expression 
                 example 
                 example 
                 example 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
            
               
                 TTL/BFL 
                 2.0536 
                 2.0853 
                 2.0830 
               
               
                 L1R2/f 
                 −5.6735 
                 −6.1949 
                 −7.5861 
               
               
                 (L1R1 + L1R2)/(L1R1 − L1R2) 
                 −0.9006 
                 −0.9084 
                 −0.9245 
               
               
                 L2R2/f 
                 0.2200 
                 0.2200 
                 0.2200 
               
               
                 (L2R1 + L2R2)/(L1R1 − L2R2) 
                 2.0928 
                 2.0760 
                 2.2098 
               
               
                 f/f1 
                 1.8913 
                 1.8791 
                 1.8634 
               
               
                 f/f3 
                 0.4183 
                 0.3254 
                 0.1689 
               
               
                 f/f4 
                 −0.7774 
                 −0.6859 
                 −0.5795 
               
               
                 f/f5 
                 0.8640 
                 0.8726 
                 0.8587 
               
               
                 BFL/2ImgHT 
                 1.0229 
                 1.0105 
                 1.0146 
               
               
                 f/2ImgHT 
                 1.8750 
                 1.8750 
                 1.8750 
               
               
                 TTL/f 
                 1.1203 
                 1.1238 
                 1.1272 
               
               
                 (TTL − BFL)/BFL 
                 1.0536 
                 1.0853 
                 1.0830 
               
               
                 D23/D34 
                 0.6250 
                 0.6250 
                 0.6250 
               
               
                 FOV 
                 29.460 
                 29.460 
                 29.500 
               
               
                   
               
            
           
         
       
     
     Next, a camera module including the lens imaging system  300  will be described with reference to  FIGS.  8 ,  9 A, and  9 B . 
     The camera module  14  includes the lens imaging system described above  300  and lens barrels  20 ,  30 , and  40 . However, the configuration of the camera module  14  is not limited to the lens imaging system  300  and the lens barrels  20 ,  30 , and  40 . For example, the camera module  10  may further include a driving mechanism for driving the lens imaging system  300  or the lens barrels  20 ,  30 , and  40 . 
     The lens barrels  20 ,  30 , and  40  may be configured in plural. For example, the lens barrels  20 ,  30 , and  40  may include the first lens barrel  20 , the second lens barrel  30 , and the third lens barrel  40 . The first lens barrel  20  may be configured to accommodate a partial configuration of the lens imaging system  300 . For example, the first lens barrel  20  may be configured to accommodate lenses  310 ,  320 , and  330  of the lens imaging system  300 . The first lens barrel  20  has a predetermined length BL 1 . For example, the length BL 1  of the first lens barrel  20  may be greater than a distance D 13  from the object side surface of the first lens  310  to the image side surface of the third lens  330 . The second lens barrel  30  is configured to accommodate the remaining lenses of the lens imaging system  300 . For example, the second lens barrel  30  may be configured to accommodate the fourth lens  340  and the fifth lens  350 . The second lens barrel  30  has a predetermined length BL 2 . For example, the length BL 2  of the second lens barrel  30  may be greater than a distance D 45  from the object side surface of the fourth lens  340  to the image side surface of the fifth lens  350 . The third lens barrel  40  may accommodate the remaining configurations of the lens imaging system  300 . For example, the third lens barrel  40  may be configured to accommodate the filter  370  and the image senor  380  of the lens imaging system  300 . The third lens barrel  40  has a predetermined length BL 3 . For example, the length BL 3  of the third lens  40  may be greater than the distance BFL from the image side surface of the fifth lens  350  to the imaging surface of the image sensor  380 . 
     The first lens barrel  20  and the second lens barrel  30  are configured to be accommodated in the third lens barrel  40 . For example, the first lens barrel  20  and the second lens barrel  30  may be completely accommodated inside the third lens barrel  40  in an inactive state of the camera module  14 . 
     Optionally, the second lens barrel  30  may be configured to be disposed outwardly of the third lens barrel  40 . For example, the second lens barrel  30  may be disposed outwardly of the third lens barrel  40  through an opening  42  of the third lens barrel  40 . The opening  42  is formed on one side of the third lens barrel  40 . The third lens barrel  40  may include a cover  44  for selectively opening and closing the opening  42 . The cover  44  may be coupled to the third lens barrel  40  by a hinge member  48 . 
     The second lens barrel  30  may be coupled to the first lens barrel  20  by a hinge member  28 . Therefore, the second lens barrel  30  may be rotate around the hinge member  28 , and may be disposed in an up-and-down inverted state, as shown in  FIG.  9 B , while being carried out through the opening  42 . 
     As set forth above, according to the examples, a lens imaging system and a camera module capable of high magnification imaging may be provided. 
     While this disclosure includes specific examples, it will be apparent to one of ordinary skill in the art 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 to have 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.