Patent Publication Number: US-7911711-B1

Title: Photographing optical lens assembly

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This non-provisional application claims priority under 35 U.S.C. §119(a) on Patent Application No(s). 099112822 filed in Taiwan, R.O.C. on Apr. 23, 2010, the entire contents of which are hereby incorporated by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a photographing optical lens assembly, and more particularly, to a compact photographing optical lens assembly used in portable electronic devices. 
     2. Description of the Prior Art 
     In recent years, with the popularity of mobile phone cameras, the demand for compact imaging lenses is increasing, and the sensor of a general photographing camera is none other than CCD (charge coupled device) or CMOS device (Complementary Metal Oxide Semiconductor device). Furthermore, as advanced semiconductor manufacturing technology has allowed the pixel size of sensors to be reduced and the resolution of compact imaging lenses has gradually increased, there is an increasing demand for compact imaging lenses featuring better image quality. 
     A conventional compact photographing optical lens assembly for mobile electronics, such as the one disclosed in U.S. Pat. No. 7,365,920, generally comprises four lens elements, wherein two spherical-surface glass lenses are used as the first and second lens elements, and being adhered together to form a doublet and thereby to correct the chromatic aberration. Such an arrangement of optical elements, however, has the following disadvantages: (1) the freedom of the system is curtailed due to the employment of excess number of spherical-surface glass lenses, thus the total track length of the system cannot be reduced easily; (2) the process of making the glass lenses adhered together is complicated, posing difficulties in manufacture. In addition, a four independent lens elements optical system is disclosed by U.S. Pat. No. 7,643,225, comprising multiple aspheric lens elements, which effectively shortens the total track length and obtains high image quality. 
     However, due to the popularity of high standard mobile devices such as smart phones and PDAs (Personal Digital Assistant) driving the rapid improvements in high resolution and image quality of the compact imaging lens systems, conventional four lens elements systems no longer satisfy the higher level camera modules. Furthermore, with the current trend for high performance and compact design in electronic products, the need for high resolution and high performance compact photographing optical lens assembly is very crucial in high level electronics development. 
     Therefore, a need exists in the art for a photographing optical lens assembly that features better image quality, maintains a moderate total track length and is applicable to compact portable electronic products. 
     SUMMARY OF THE INVENTION 
     The present invention provides a photographing optical lens assembly comprising: in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power having a concave object-side surface and a concave image-side surface; a third lens element with positive refractive power; a fourth lens element with negative refractive power having a convex image-side surface and a concave image-side surface, at least one of the object-side and image-side surfaces thereof being aspheric; and a fifth lens element having a convex object-side surface and a concave image-side surface, at least one inflection point formed on the image-side surface, made of plastic; wherein the photographing optical lens assembly further comprises an aperture stop and an electronic sensor for image formation, wherein the aperture stop is disposed between the imaged object and the third lens element; wherein the first lens element of the photographing optical lens assembly is closest to the object, and there are at most six lens elements with refractive power in the photographing optical lens assembly; and wherein the radius of curvature on the image-side surface of the second lens element is R4, the focal length of the photographing optical lens assembly is f, the Abbe number of the first lens element is V1, the Abbe number of the second lens element is V2, the distance on the optical axis between the aperture stop and the electronic sensor is SL, the distance on the optical axis between the object-side surface of the first lens element and the electronic sensor is TTL, and they satisfy the relation:
 
0.3 &lt;R 4 /f&lt; 30.0;
 
23.0&lt;V1-V2&lt;45.0;
 
0.65 &lt;SL/TTL&lt; 1.10
 
     According to another aspect of the present invention, a photographing optical lens assembly comprises, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power having a concave object-side surface and a concave image-side surface; a third lens element with positive refractive power having a concave object-side surface and a convex image-side surface; a fourth lens element with negative refractive power, at least one of the object-side and image-side surfaces thereof being aspheric; a fifth lens element having a convex object-side surface and a concave image-side surface, the object-side and image-side surfaces thereof being aspheric; wherein the photographing optical lens assembly further comprises an aperture stop and an electronic sensor for image formation, and the aperture stop is disposed between the imaged object and the third lens element; wherein there are five lens elements with refractive power in the photographing optical lens assembly; wherein the radius of curvature on the image-side surface of the second lens element is R4, the focal length of the photographing optical lens assembly is f, the distance on the optical axis between the first lens element and the second lens element is T12, the distance on the optical axis between the aperture stop and the electronic sensor is SL, the distance on the optical axis between the object-side surface of the first lens element and the electronic sensor is TTL, and they satisfy the relation:
 
0.3 &lt;R 4 /f&lt; 30.0;
 
0.5&lt;( T 12 /f )*100&lt;15.0;
 
0.65 &lt;SL/TTL&lt; 1.10
 
     Such an arrangement of optical elements can reduce the size as well as the sensitivity of the optical system and obtain higher resolution. 
     In the present photographing optical lens assembly, the first lens element has positive refractive power supplying a portion of total refractive power needed in the system, which reduces the total track length of the photographing optical lens assembly; the second lens element has negative refractive power so that the aberration generated from the positive refractive power of the first lens element and the chromatic aberration of the system can be favorably corrected; the third lens element has positive refractive power, which effectively distributes the refractive power of the first lens element and reduces the sensitivity of the system; the fourth lens element having negative refractive power along with the third lens element can form the one-positive-one-negative telephoto structure, which effectively reduces the total track length of the photographing optical lens assembly; the fifth lens element can have positive or negative refractive power, which functions as a corrective lens balancing and correcting all types of aberrations within the system; when the fifth lens element has positive refractive power, coma can be effectively corrected while preventing other aberrations from becoming too large; when the fifth lens element has negative refractive power, the principal point of the optical system can be further away from the image plane, favorably reducing the total track length of the system in order to maintain the compactness of the lens assembly. 
     In the present photographing optical lens assembly, the first lens element may be a bi-convex lens element or a meniscus lens element having a convex object-side surface and a concave image-side surface. When the first lens element is a bi-convex lens element, the refractive power thereof can be effectively enhanced, thus shortening the total track length of the photographing optical lens assembly. When the first lens element is a meniscus lens element, the astigmatism of the system can be corrected more favorably. The second lens element has a concave object-side surface and a concave image-side surface that effectively correct the Petzval Sum of the system, allowing the surrounding image plane to become more flat and to favorably extend the back focal length of the system, thereby providing sufficient space to accommodate other components. The third lens element may be a meniscus with a concave object-side surface and a convex image-side surface whereas the fourth and fifth lens elements are meniscus lens elements with a convex object-side surface and a concave image-side surface so as to correct the astigmatism and obtain high image quality in the system. Moreover, the third, fourth, and fifth lens elements are meniscus lens elements with more balanced refractive power that effectively reduces the system sensitivity. 
     In the aforementioned photographing optical lens assembly, the aperture stop can be disposed between the imaged object and the first lens element, the first lens element and the second lens element, or the second lens element and the third lens element. The first lens element provides positive refractive power, and the aperture stop is disposed near the object side of the photographing optical lens assembly, thereby the total track length of the photographing optical lens assembly can be reduced effectively. The aforementioned arrangement also enables the exit pupil of the photographing optical lens assembly to be positioned far away from the image plane, thus light will be projected onto the electronic sensor at a nearly perpendicular angle, and this is the telecentric feature of the image side. The telecentric feature is very important to the photosensitivity of the solid-state sensor as it can improve the photosensitivity of the sensor and reduce the probability of the shading occurrence. Moreover, the fifth lens element is provided with at least one inflection point, thereby the angle at which the light is projected onto the sensor from the off-axis field can be effectively reduced to further correct the off-axis aberrations. In addition, when the aperture stop is disposed closer to the third lens elements, a wide field of view can be favorably achieved. Such stop placement facilitates the correction of the distortion and chromatic aberration of magnification, and the mitigation of the system&#39;s sensitivity. Therefore, in the present photographing optical lens assembly, the aperture stop is placed between the imaged object and the third lens element for the purpose of achieving a balance between the telecentric feature and wide field of view of the photographing optical lens assembly; preferably, the aperture stop is disposed between the first lens element and the second lens element. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows a photographing optical lens assembly in accordance with a first embodiment of the present invention. 
         FIG. 2  shows the aberration curves of the first embodiment of the present invention. 
         FIG. 3  shows a photographing optical lens assembly in accordance with a second embodiment of the present invention. 
         FIG. 4  shows the aberration curves of the second embodiment of the present invention. 
         FIG. 5  shows a photographing optical lens assembly in accordance with a third embodiment of the present invention. 
         FIG. 6  shows the aberration curves of the third embodiment of the present invention. 
         FIG. 7  shows a photographing optical lens assembly in accordance with a fourth embodiment of the present invention. 
         FIG. 8  shows the aberration curves of the fourth embodiment of the present invention. 
         FIG. 9  shows a photographing optical lens assembly in accordance with a fifth embodiment of the present invention. 
         FIG. 10  shows the aberration curves of the fifth embodiment of the present invention. 
         FIG. 11  shows a photographing optical lens assembly in accordance with a sixth embodiment of the present invention. 
         FIG. 12  shows the aberration curves of the sixth embodiment of the present invention. 
         FIG. 13  is TABLE 1 which lists the optical data of the first embodiment. 
         FIGS. 14A and 14B  are TABLES 2A and 2B which list the aspheric surface data of the first embodiment. 
         FIG. 15  is TABLE 3 which lists the optical data of the second embodiment. 
         FIGS. 16A and 16B  are TABLES 4A and 4B which list the aspheric surface data of the second embodiment. 
         FIG. 17  is TABLE 5 which lists the optical data of the third embodiment. 
         FIGS. 18A and 18B  are TABLES 6A and 6B which list the aspheric surface data of the third embodiment. 
         FIG. 19  is TABLE 7 which lists the optical data of the fourth embodiment. 
         FIG. 20  is TABLE 8 which lists the aspheric surface data of the fourth embodiment. 
         FIG. 21  is TABLE 9 which lists the optical data of the fifth embodiment. 
         FIG. 22  is TABLE 10 which lists the aspheric surface data of the fifth embodiment. 
         FIG. 23  is TABLE 11 which lists the optical data of the sixth embodiment. 
         FIG. 24  is TABLE 12 which lists the aspheric surface data of the sixth embodiment. 
         FIG. 25  is TABLE 13 which lists the data of the respective embodiments resulting from the equations. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The present invention provides a photographing optical lens assembly comprising, in order from the object side to the image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power having a concave object-side surface and a concave image-side surface; a third lens element with positive refractive power; a fourth lens element with negative refractive power having a convex object-side surface and a concave image-side surface, at least one of the object-side and image-side surfaces thereof being aspheric; and a fifth lens element having a convex object-side surface and a concave image-side surface, at least one inflection point formed on the image-side surface, made of plastic; wherein the photographing optical lens assembly further comprises an aperture stop and an electronic sensor for image formation; wherein the aperture stop is disposed between the imaged object and the third lens element; wherein the lens element of the photographing optical lens assembly with refractive power closest to the object side is the first lens element, and there are at most six lens elements with refractive power; and wherein the radius of curvature on the image-side surface of the second lens element is R4, the focal length of the photographing optical lens assembly is f, the Abbe number of the first lens element is V1, the Abbe number of the second lens element is V2, the distance on the optical axis between the aperture stop and the electronic sensor is SL, the distance on the optical axis between the object-side surface of the first lens element and the electronic sensor is TTL, and they satisfy the relation:
 
0.3 &lt;R 4 /f&lt; 30.0;
 
23.0&lt;V1-V2&lt;45.0;
 
0.65 &lt;SL/TTL&lt; 1.10
 
     When the aforementioned photographing optical lens assembly satisfies the relation: 0.3&lt;R4/f&lt;30.0, the back focal distance can be effectively increased to allow placement of other components; preferably, they satisfy the relation: 0.6&lt;R4/f&lt;2.0. When the aforementioned photographing optical lens assembly satisfies the relation: 23.0&lt;V1-V2&lt;45.0, the chromatic aberration of the photographing optical lens assembly can be favorably corrected; preferably, they satisfy the relation: 31.0&lt;V1-V2&lt;42.0. When the aforementioned photographing optical lens assembly satisfies the relation: 0.65&lt;SL/TTL&lt;1.10, the photographing optical lens assembly can obtain a good balance between the telecentric feature and wide field of view; preferably, the aperture stop is disposed between the first lens element and the second lens element, and they satisfy the relation: 0.78&lt;SL/TTL&lt;0.93. 
     In the aforementioned photographing optical lens assembly, it is preferable that the third lens element has a concave object-side surface and a convex image-side surface so as to favorably correct the astigmatism of the system; preferably, the fifth lens element has negative refractive power, causing the principal point of the optical system to be away from the image plane which reduces the total track length of the optical system to maintain the compact size of the lens assembly; preferably, there are five lens elements with refractive power in the photographing lens assembly, and with suitable number of lens elements, the system can obtain higher image quality without having the total track length of the lens assembly being too long. 
     In the aforementioned photographing optical lens assembly, preferably, it satisfies the relation: 0.80&lt;f/f1&lt;2.00, wherein the focal length of the photographing optical lens assembly is f, the focal length of the first lens element is f1. When the above relation is satisfied, the refractive power of the first lens element is more balanced so that the total track length of the system can be effectively controlled to keep the photographing optical lens assembly compact while preventing the high order spherical aberration from becoming too large with improved image quality, preferably, they satisfy the relation: 1.32&lt;f/f1&lt;2.00. 
     In the aforementioned photographing optical lens assembly, preferably, it satisfies the relation: 0.25&lt;f1/f3&lt;1.20, wherein the focal length of the first lens element is f1, the focal length of the third lens element is f3. When the photographing optical lens assembly satisfies the above relation, the distribution of refractive power from the first lens element and the third lens element is more balanced, which reduces the sensitivity of the system and the generation of aberration. 
     In the aforementioned photographing optical lens assembly, preferably, it satisfies the relation: 0.3&lt;(CT2/f)*10&lt;1.1, wherein the thickness on the optical axis of the second lens element is CT2, the focal length of the photographing optical lens assembly is f. When the photographing optical lens assembly satisfies the above relation, the thickness of the second lens element is better suited for obtaining a good balance between the manufacturing yields and correcting the aberration of the system, and favorable for moldability and homogeneity of injection molding of plastic lenses. 
     In the aforementioned photographing optical lens assembly, preferably, it satisfies the relation: 0.5&lt;(T12/f)*100&lt;9.5, wherein the distance on the optical axis between the first and second lens elements is T12, the focal length of the photographing lens assembly is f. When the photographing lens assembly satisfies the above relation, the distance on the optical axis between the first and second lens elements is better for avoiding difficulties in lens assembly due to tight spacing or the distance from being too long where the lens assembly will no longer be compact; preferably, they satisfy the relation: 0.5&lt;(T12/f)*100&lt;5.5. 
     In the aforementioned photographing optical lens assembly, preferably, it satisfies the relation: −0.35&lt;f/f5&lt;0.35, wherein the focal length of the photographing optical lens assembly is f, the focal length of the fifth lens element is f5. When the photographing optical lens assembly satisfies the above relation, the fifth lens element serves as a corrective lens element, which corrects the aberration and distortion of the system and increases the resolution of the photographing optical lens assembly. 
     In the aforementioned photographing optical lens assembly, preferably, it satisfies the relation: TTL/ImgH&lt;1.95, wherein the distance on the optical axis between the object-side surface of the first lens element and the electronic sensor is TTL, half of the diagonal length of the effective pixel area of the electronic sensor is ImgH. When the photographing optical lens assembly satisfies the above relation, to the photographing optical lens assembly can maintain a compact form so that it can be installed in compact portable electronic products. 
     According to another aspect of the present invention, a photographing optical lens assembly comprises, in order from the object side to the image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power having a concave object-side surface and a concave image-side surface; a third lens element with positive refractive power having a concave object-side surface and a convex image-side surface; a fourth lens element with negative refractive power at least one of the object-side and image-side surfaces thereof being aspheric; and a fifth lens element having a convex object-side surface and a concave image-side surface, the object-side and image-side surfaces thereof being aspheric; wherein the photographing optical lens assembly further comprises an aperture stop and an electronic sensor for image formation, the aperture stop is disposed between the imaged object and the third lens element; wherein there are five lens elements with refractive power; and wherein the radius of curvature on the image-side surface of the second lens element is R4, the focal length of the photographing optical lens assembly is f, the distance on the optical axis between the first lens element and the second lens element is T12, the distance on the optical axis between the aperture stop and the electronic sensor is SL, the distance on the optical axis between the object-side surface of the first lens element and the electronic sensor is TTL, and they satisfy the relation:
 
0.3 &lt;R 4 /f&lt; 30.0;
 
0.5&lt;( T 12 /f )*100&lt;15.0;
 
0.65 &lt;SL/TTL&lt; 1.10
 
     When the aforementioned photographing optical lens assembly satisfies the relation: 0.3&lt;R4/f&lt;30.0, the back focal distance can be effectively increased to allow placement of other components; preferably, they satisfy the relation: 0.5&lt;R4/f&lt;10.0. When the aforementioned photographing optical lens assembly satisfies the relation: 0.5&lt;(T12/f)*100&lt;15.0, the distance on the optical axis between the first and second lens elements is more appropriate, avoiding difficulties in assembly due to tight spacing or too much spacing causing the lens assembly no longer being compact; moreover, they preferably satisfy the relation: 0.5&lt;(T12/f)*100&lt;9.5. When the aforementioned photographing optical lens assembly satisfies the relation: 0.65&lt;SL/TTL&lt;1.10, the photographing optical lens assembly can obtain a good balance between the telecentric feature and wide field of view; preferably, the aperture stop is disposed between the first lens element and the second lens element, and they satisfy the relation: 0.78&lt;SL/TTL&lt;0.93. 
     In the aforementioned photographing optical lens assembly, preferably, the fourth lens element has a convex object-side surface and a concave image-side surface for favorably correcting the aberration of the system; preferably, the fifth lens element has at least one inflection point on the image-side surface, thereby the angle at which the light is projected onto the sensor from the off-axis field can be effectively reduced to further correct the off-axis aberrations; preferably, the fifth lens element is made of plastic that the adoption of plastic material in lens manufacturing can effectively reduce the weight of the lens assembly while reducing production costs. 
     In the aforementioned photographing optical lens assembly, preferably, it satisfies the relation: 31.0&lt;V1-V2&lt;42.0, wherein the Abbe number of the first lens element is V1, the Abbe number of the second lens element is V2. When the photographing optical lens assembly satisfies the above relation, the chromatic aberration in the photographing optical lens assembly can be favorably corrected. 
     In the aforementioned photographing optical lens assembly, preferably, it satisfies the relation: 1.32&lt;f/f1&lt;2.00, wherein the focal length of the photographing optical lens assembly is f, the focal length of the first lens element is f1. When the photographing optical lens assembly satisfies the above relation, the distribution of refractive power of the first lens element is more balanced, effectively maintaining the total track length of the system, being compact, and preventing the high order spherical aberration from begin too large, in order to increase image quality. 
     In the aforementioned photographing optical lens assembly, preferably, it satisfies the relation: −0.35&lt;f/f5&lt;0.35, wherein the focal length of the photographing optical lens assembly is f, the focal length of the fifth lens element is f5. When the photographing optical lens assembly satisfies the above relation, the fifth lens element serves as a correcting lens which corrects the aberration and distortion of the system while increasing the resolution of the photographing optical lens assembly. 
     In the aforementioned photographing optical lens assembly, preferably, it satisfies the relation: 23.0&lt;V3-V4&lt;45.0, wherein the Abbe number of the third lens element is V3, the Abbe number of the fourth lens element is V4. When the photographing optical lens assembly satisfies the above relation, the chromatic aberration of the photographing optical lens assembly can be favorably corrected. 
     In the present photographing optical lens assembly, the lens elements can be made of glass or plastic. If the lens elements are made of glass, there is more freedom in distributing the refractive power of the system. If plastic material is adopted to produce the lens elements, the production cost will be reduced effectively. Additionally, the surfaces of the lens elements can be aspheric and easily made into non-spherical profiles, allowing more design parameter freedom which can be used to reduce aberrations and the number of the lens elements, so that the total track length of the photographing optical lens assembly can be effectively reduced. 
     In the present photographing optical lens assembly, if a lens element has a convex surface, it means the portion of the surface in proximity to the axis is convex; if a lens element has a concave surface, it means the portion of the surface in proximity to the axis is concave. 
     Preferred embodiments of the present invention will be described in the following paragraphs by referring to the accompanying drawings. 
       FIG. 1  shows a photographing optical lens assembly in accordance with a first embodiment of the present invention, and  FIG. 2  shows the aberration curves of the first embodiment of the present invention. The photographing optical lens assembly of the first embodiment of the present invention mainly comprises five lens elements, in order from the object side to the image side: a plastic first lens element  110  with positive refractive power having a convex object-side surface  111  and a convex image-side surface  112 , the object-side and image-side surfaces  111  and  112  thereof being aspheric; a plastic second lens element  120  with negative refractive power having a concave object-side surface  121  and a concave image-side surface  122 , the object-side and image-side surfaces  121  and  122  thereof being aspheric; a plastic third lens element  130  with positive refractive power having a concave object-side surface  131  and a convex image-side surface  132 , the object-side and image-side surfaces  131  and  132  thereof being aspheric; a plastic fourth lens element  140  with negative refractive power having a convex object-side surface  141  and a concave image-side surface  142 , the object-side surface  141  and the image-side surface  142  thereof being aspheric; a plastic fifth lens element  150  with positive refractive power having a convex object-side surface  151  and a concave image-side surface  152 , the object-side surface  151  and the image-side surface  152  thereof being aspheric, at least one inflection point is formed on the image-side surface  152 ; wherein an aperture stop  100  is disposed between the imaged object and the first lens elements  110 ; wherein an IR filter  160  is disposed between the image-side surface  152  of the fifth lens element  150  and an image plane  170 ; and wherein the IR filter  160  has no influence on the focal length of the photographing optical lens assembly. 
     The equation of the aspheric surface profiles is expressed as follows: 
     
       
         
           
             
               X 
               ⁡ 
               
                 ( 
                 Y 
                 ) 
               
             
             = 
             
               
                 
                   ( 
                   
                     
                       Y 
                       2 
                     
                     / 
                     R 
                   
                   ) 
                 
                 / 
                 
                   ( 
                   
                     1 
                     + 
                     
                       sqrt 
                       ⁡ 
                       
                         ( 
                         
                           1 
                           - 
                           
                             
                               ( 
                               
                                 1 
                                 + 
                                 k 
                               
                               ) 
                             
                             * 
                             
                               
                                 ( 
                                 
                                   Y 
                                   / 
                                   R 
                                 
                                 ) 
                               
                               2 
                             
                           
                         
                         ) 
                       
                     
                   
                   ) 
                 
               
               + 
               
                 
                   ∑ 
                   i 
                 
                 ⁢ 
                 
                   
                     ( 
                     Ai 
                     ) 
                   
                   * 
                   
                     ( 
                     
                       Y 
                       i 
                     
                     ) 
                   
                 
               
             
           
         
       
     
     wherein: 
     X: the height of a point on the aspheric surface at a distance Y from the optical axis relative to the tangential plane at the aspheric surface vertex; 
     Y: the distance from the point on the curve of the aspheric surface to the optical axis; 
     k: the conic coefficient; 
     Ai: the aspheric coefficient of order i. 
     In the first embodiment of the present photographing optical lens assembly, the focal length of the photographing optical lens assembly is f, and it satisfies the relation: f=3.90 (mm). 
     In the first embodiment of the present photographing optical lens assembly, the f-number of the photographing optical lens assembly is Fno, and it satisfies the relation: Fno=2.80. 
     In the first embodiment of the present photographing optical lens assembly, half of the maximal field of view of the photographing optical lens assembly is HFOV, and it satisfies the relation: HFOV=36.0 deg. 
     In the first embodiment of the present photographing optical lens assembly, the Abbe number of the first lens element  110  is V1, the Abbe number of the second lens element  120  is V2, and they satisfy the relation:
 
V1-V2=32.5.
 
     In the first embodiment of the present photographing optical lens assembly, the Abbe number of the third lens element  130  is V3, the Abbe number of the fourth lens element  140  is V4, and they satisfy the relation:
 
V3-V4=32.4.
 
     In the first embodiment of the present photographing optical lens assembly, the thickness on the optical axis of the second lens element  120  is CT2, the focal length of the photographing optical lens assembly is f, and they satisfy the relation:
 
( CT 2 /f )*10=1.42.
 
     In the first embodiment of the present photographing optical lens assembly, the radius of curvature of the image-side surface  122  of the second lens element  120  is R4, the focal length of the photographing optical lens assembly is f, and they satisfy the relation:
 
 R 4 /f= 5.79.
 
     In the first embodiment of the present photographing optical lens assembly, the focal length of the photographing optical lens assembly is f, the focal length of the first lens element  110  is f1, and they satisfy the relation:
 
 f/f 1=1.14.
 
     In the first embodiment of the present photographing optical lens assembly, the focal length of the photographing optical lens assembly is f, the focal length of the fifth lens element  150  is f5, and they satisfy the relation:
 
 f/f 5=0.05.
 
     In the first embodiment of the present photographing optical lens assembly, the focal length of the first lens element  110  is f1, the focal length of the third lens element  130  is f3, and they satisfy the relation:
 
 f 1 /f 3=0.78.
 
     In the first embodiment of the present photographing optical lens assembly, the distance on the optical axis between the first lens element  110  and the second lens element  120  is T12, the focal length of the photographing optical lens assembly is f, and they satisfy the relation:
 
( T 12 /f )*100=7.77.
 
     In the first embodiment of the present photographing optical lens assembly, an electronic sensor is disposed at the image plane  170  for image formation. The distance on the optical axis between the aperture stop  100  and the electronic sensor is SL, the distance on the optical axis between the object-side surface  111  of the first lens element  110  and the electronic sensor is TTL, and they satisfy the relation:
 
 SL/TTL= 1.02.
 
     In the first embodiment of the present photographing optical lens assembly, the distance on the optical axis between the object-side surface  111  of the first lens element  110  and the electronic sensor is TTL, half of the diagonal length of the effective pixel area of the electronic sensor is ImgH, and they satisfy the relation:
 
 TTL/ImgH= 1.80.
 
     The detailed optical data of the first embodiment is shown in  FIG. 13  (TABLE 1), and the aspheric surface data is shown in  FIGS. 14A and 14B   
     (TABLES 2A and 2B), wherein the units of the radius of curvature, the thickness and the focal length are expressed in mm, and HFOV is half of the maximal field of view. 
       FIG. 3  shows a photographing optical lens assembly in accordance with a second embodiment of the present invention, and  FIG. 4  shows the aberration curves of the second embodiment of the present invention. The photographing optical lens assembly of the second embodiment of the present invention mainly comprises five lens elements, in order from the object side to the image side: a plastic first lens element  210  with positive refractive power having a convex object-side surface  211  and a convex image-side surface  212 , the object-side and image-side surfaces  211  and  212  thereof being aspheric; a plastic second lens element  220  with negative refractive power having a concave object-side surface  221  and a concave image-side surface  222 , the object-side and image-side surfaces  221  and  222  thereof being aspheric; a plastic third lens element  230  with positive refractive power having a concave object-side surface  231  and a convex image-side surface  232 , the object-side and image-side surfaces  231  and  232  thereof being aspheric; a plastic fourth lens element  240  with negative refractive power having a convex object-side surface  241  and a concave image-side surface  242 , the object-side and image-side surfaces  241  and  242  thereof being aspheric; and a plastic fifth lens element  250  with negative refractive power having a convex object-side surface  251  and a concave image-side surface  252 , the object-side and image-side surfaces  251  and  252  thereof being aspheric, at least one inflection point formed on the image-side surface  252 ; wherein an aperture stop  200  is disposed between the imaged object and the first lens element  210 ; wherein an IR filter  260  is disposed between the image-side surface  252  of the fifth lens element  250  and an image plane  270 ; and wherein the IR filter  260  has no influence on the focal length of the photographing optical lens assembly. 
     The equation of the aspheric surface profiles of the second embodiment has the same form as that of the first embodiment. 
     In the second embodiment of the present photographing optical lens assembly, the focal length of the photographing optical lens assembly is f, and it satisfies the relation: f=3.94 (mm). 
     In the second embodiment of the present photographing optical lens assembly, the f-number of the photographing optical lens assembly is Fno, and it satisfies the relation: Fno=2.80. 
     In the second embodiment of the present photographing optical lens assembly, half of the maximal field of view of the photographing optical lens assembly is HFOV, and it satisfies the relation: HFOV=35.7 deg. 
     In the second embodiment of the present photographing optical lens assembly, the Abbe number of the first lens element  210  is V1, the Abbe number of the second lens element  220  is V2, and they satisfy the relation:
 
V1-V2=32.5.
 
     In the second embodiment of the present photographing optical lens assembly, the Abbe number of the third lens element  230  is V3, the Abbe number of the fourth lens element  240  is V4, and they satisfy the relation:
 
V3-V4=32.4.
 
     In the second embodiment of the present photographing optical lens assembly, the thickness on the optical axis of the second lens element  220  is CT2, the focal length of the photographing optical lens assembly is f, and they satisfy the relation:
 
( CT 2 /f )*10=1.43.
 
     In the second embodiment of the present photographing optical lens assembly, the radius of curvature of the image-side surface  222  of the second lens element  220  is R4, the focal length of the photographing optical lens assembly is f, and they satisfy the relation:
 
 R 4 /f= 5.97.
 
     In the second embodiment of the present photographing optical lens assembly, the focal length of the photographing optical lens assembly is f, the focal length of the first lens element  210  is f1, and they satisfy the relation:
 
 f/f 1=1.16.
 
     In the second embodiment of the present photographing optical lens assembly, the focal length of the photographing optical lens assembly is f, the focal length of the fifth lens element  250  is f5, and they satisfy the relation:
 
 f/f 5=−0.16.
 
     In the second embodiment of the present photographing optical lens assembly, the focal length of the first lens element  210  is f1, the focal length of the third lens element  230  is f3, and they satisfy the relation:
 
 f 1 /f 3=0.84.
 
     In the second embodiment of the present photographing optical lens assembly, the distance on the optical axis between the first lens element  210  and the second lens element  220  is T12, the focal length of the photographing optical lens assembly is f, and they satisfy the relation:
 
( T 12 /f )*100=7.46.
 
     In the second embodiment of the present photographing optical lens assembly, an electronic sensor is disposed at the image plane  270  for image formation. The distance on the optical axis between the aperture stop  200  and the electronic sensor is SL, the distance on the optical axis between the object-side surface  211  of the first lens element  210  and the electronic sensor is TTL, and they satisfy the relation:
 
 SL/TTL= 1.02.
 
     In the second embodiment of the present photographing optical lens assembly, the distance on the optical axis between the object-side surface  211  of the first lens element  210  and the electronic sensor is TTL, half of the diagonal length of the effective pixel area of the electronic sensor is ImgH, and they satisfy the relation:
 
 TTL/ImgH= 1.80.
 
     The detailed optical data of the second embodiment is shown in  FIG. 15  (TABLE 3), and the aspheric surface data is shown in  FIGS. 16A and 16B  (TABLES 4A and 4B), wherein the units of the radius of curvature, the thickness and the focal length are expressed in mm, and HFOV is half of the maximal field of view. 
       FIG. 5  shows a photographing optical lens assembly in accordance with a third embodiment of the present invention, and  FIG. 6  shows the aberration curves of the third embodiment of the present invention. The photographing optical lens assembly of the third embodiment of the present invention mainly comprises five lens elements, in order from the object side to the image side: a plastic first lens element  310  with positive refractive power having a convex object-side surface  311  and a convex image-side surface  312 , the object-side and image-side surfaces  311  and  312  thereof being aspheric; a plastic second lens element  320  with negative refractive power having a concave object-side surface  321  and a concave image-side surface  322 , the object-side and image-side surfaces  321  and  322  thereof being aspheric; a plastic third lens element  330  with positive refractive power having a concave object-side surface  331  and a convex image-side surface  332 , the object-side and image-side surfaces  331  and  332  thereof being aspheric; a plastic fourth lens element  340  with negative refractive power having a convex object-side surface  341  and a concave image-side surface  342 , the object-side and image-side surfaces  341  and  342  thereof being aspheric; and a plastic fifth lens element  350  with negative refractive power having a convex object-side surface  351  and a concave image-side surface  352 , the object-side and image-side surfaces  351  and  352  thereof being aspheric, at least one inflection point formed on the image-side surface  352 ; wherein an aperture stop  300  is disposed between the first and second lens elements  310  and  320 ; wherein an IR filter  360  is disposed between the image-side surface  352  of the fifth lens element  350  and an image plane  370 ; and wherein the IR filter  360  has no influence on the focal length of the photographing optical lens assembly. 
     The equation of the aspheric surface profiles of the third embodiment has the same form as that of the first embodiment. 
     In the third embodiment of the present photographing optical lens assembly, the focal length of the photographing optical lens assembly is f, and it satisfies the relation: f=4.23 (mm). 
     In the third embodiment of the present photographing optical lens assembly, the f-number of the photographing optical lens assembly is Fno, and it satisfies the relation: Fno=2.78. 
     In the third embodiment of the present photographing optical lens assembly, half of the maximal field of view of the photographing optical lens assembly is HFOV, and it satisfies the relation: HFOV=33.8 deg. 
     In the third embodiment of the present photographing optical lens assembly, the Abbe number of the first lens element  310  is V1, the Abbe number of the second lens element  320  is V2, and they satisfy the relation:
 
V1-V2=32.5.
 
     In the third embodiment of the present photographing optical lens assembly, the Abbe number of the third lens element  330  is V3, the Abbe number of the fourth lens element  340  is V4, and they satisfy the relation:
 
V3-V4=23.8.
 
     In the third embodiment of the present photographing optical lens assembly, the thickness on the optical axis of the second lens element  320  is CT2, the focal length of the photographing optical lens assembly is f, and they satisfy the relation:
 
( CT 2 /f )*10=0.80.
 
     In the third embodiment of the present photographing optical lens assembly, the radius of curvature of the image-side surface  322  of the second lens element  320  is R4, the focal length of the photographing optical lens assembly is f, and they satisfy the relation:
 
 R 4 /f= 1.15.
 
     In the third embodiment of the present photographing optical lens assembly, the focal length of the photographing optical lens assembly is f, the focal length of the first lens element  310  is f1, and they satisfy the relation:
 
 f/f 1=1.33.
 
     In the third embodiment of the present photographing optical lens assembly, the focal length of the photographing optical lens assembly is f, the focal length of the fifth lens element  350  is f5, and they satisfy the relation:
 
 f/f 5=−0.06.
 
     In the third embodiment of the present photographing optical lens assembly, the focal length of the first lens element  310  is f1, the focal length of the third lens element  330  is f3, and they satisfy the relation:
 
 f 1 /f 3=0.65.
 
     In the third embodiment of the present photographing optical lens assembly, the distance on the optical axis between the first lens element  310  and the second lens element  320  is T12, the focal length of the photographing optical lens assembly is f, and they satisfy the relation:
 
( T 12 /f )*100=3.66.
 
     In the third embodiment of the present photographing optical lens assembly, an electronic sensor is disposed at the image plane  370  for image formation. The distance on the optical axis between the aperture stop  300  and the electronic sensor is SL, the distance on the optical axis between the object-side surface  311  of the first lens element  310  and the electronic sensor is TTL, and they satisfy the relation:
 
 SL/TTL= 0.90.
 
     In the third embodiment of the present photographing optical lens assembly, the distance on the optical axis between the object-side surface  311  of the first lens element  310  and the electronic sensor is TTL, half of the diagonal length of the effective pixel area of the electronic sensor is ImgH, and they satisfy the relation:
 
 TTL/ImgH= 1.82.
 
     The detailed optical data of the third embodiment is shown in  FIG. 17  (TABLE 5), and the aspheric surface data is shown in  FIGS. 18A and 18B  (TABLES 6A and 6B), wherein the units of the radius of curvature, the thickness and the focal length are expressed in mm, and HFOV is half of the maximal field of view. 
       FIG. 7  shows a photographing optical lens assembly in accordance with a fourth embodiment of the present invention, and  FIG. 8  shows the aberration curves of the fourth embodiment of the present invention. The photographing optical lens assembly of the fourth embodiment of the present invention mainly comprises five lens elements, in order from the object side to the image side: a plastic first lens element  410  with positive refractive power having a convex object-side surface  411  and a convex image-side surface  412 , the object-side and image-side surfaces  411  and  412  thereof being aspheric; a plastic second lens element  420  with negative refractive power having a concave object-side surface  421  and a concave image-side surface  422 , the object-side and image-side surfaces  421  and  422  thereof being aspheric; a plastic third lens element  430  with positive refractive power having a concave object-side surface  431  and a convex image-side surface  432 , the object-side and image-side surfaces  431  and  432  thereof being aspheric; a plastic fourth lens element  440  with negative refractive power having a convex object-side surface  441  and a concave image-side surface  442 , the object-side and image-side surfaces  441  and  442  thereof being aspheric; and a plastic fifth lens element  450  with positive refractive power having a convex object-side surface  451  and a concave image-side surface  452 , the object-side and image-side surfaces  451  and  452  thereof being aspheric, at least one inflection point formed on the image-side surface  452 ; wherein an aperture stop  400  is disposed between the imaged object and the first lens element  410 ; wherein an IR filter  460  is disposed between the image-side surface  452  of the fifth lens element  450  and an image plane  470 ; and wherein the IR filter  460  has no influence on the focal length of the photographing optical lens assembly. The equation of the aspheric surface profiles of the fourth embodiment has the same form as that of the first embodiment. 
     In the fourth embodiment of the present photographing optical lens assembly, the focal length of the photographing optical lens assembly is f, and it satisfies the relation: f=4.06 (mm). 
     In the fourth embodiment of the present photographing optical lens assembly, the f-number of the photographing optical lens assembly is Fno, and it satisfies the relation: Fno=2.80. 
     In the fourth embodiment of the present photographing optical lens assembly, half of the maximal field of view of the photographing optical lens assembly is HFOV, and it satisfies the relation: HFOV=35.0 deg. 
     In the fourth embodiment of the present photographing optical lens assembly, the Abbe number of the first lens element  410  is V1, the Abbe number of the second lens element  420  is V2, and they satisfy the relation:
 
V1-V2=32.5.
 
     In the fourth embodiment of the present photographing optical lens assembly, the Abbe number of the third lens element  430  is V3, the Abbe number of the fourth lens element  440  is V4, and they satisfy the relation:
 
 V 3- V 4=−0.1.
 
     In the fourth embodiment of the present photographing optical lens assembly, the thickness on the optical axis of the second lens element  420  is CT2, the focal length of the photographing optical lens assembly is f, and they satisfy the relation:
 
( CT 2 /f )*10=0.74.
 
     In the fourth embodiment of the present photographing optical lens assembly, the radius of curvature of the image-side surface  422  of the second lens element  420  is R4, the focal length of the photographing optical lens assembly is f, and they satisfy the relation:
 
 R 4 /f= 0.97.
 
     In the fourth embodiment of the present photographing optical lens assembly, the focal length of the photographing optical lens assembly is f, the focal length of the first lens element  410  is f1, and they satisfy the relation:
 
 f/f 1=1.64.
 
     In the fourth embodiment of the present photographing optical lens assembly, the focal length of the photographing optical lens assembly is f, the focal length of the fifth lens element  450  is f5, and they satisfy the relation:
 
 f/f 5=0.21.
 
     In the fourth embodiment of the present photographing optical lens assembly, the focal length of the first lens element  410  is f1, the focal length of the third lens element  430  is f3, and they satisfy the relation:
 
 f 1 /f 3=0.62.
 
     In the fourth embodiment of the present photographing optical lens assembly, the distance on the optical axis between the first lens element  410  and the second lens element  420  is T12, the focal length of the photographing optical lens assembly is f, and they satisfy the relation:
 
( T 12 /f )*100=1.95.
 
     In the fourth embodiment of the present photographing optical lens assembly, an electronic sensor is disposed at the image plane  470  for image formation. The distance on the optical axis between the aperture stop  400  and the electronic sensor is SL, the distance on the optical axis between the object-side surface  411  of the first lens element  410  and the electronic sensor is TTL, and they satisfy the relation:
 
 SL/TTL= 0.99.
 
     In the fourth embodiment of the present photographing optical lens assembly, the distance on the optical axis between the object-side surface  411  of the first lens element  410  and the electronic sensor is TTL, half of the diagonal length of the effective pixel area of the electronic sensor is ImgH, and they satisfy the relation:
 
 TTL/ImgH= 1.72.
 
     The detailed optical data of the fourth embodiment is shown in  FIG. 19  (TABLE 7), and the aspheric surface data is shown in  FIG. 20  (TABLE 8), wherein the units of the radius of curvature, the thickness and the focal length are expressed in mm, and HFOV is half of the maximal field of view. 
       FIG. 9  shows a photographing optical lens assembly in accordance with a fifth embodiment of the present invention, and  FIG. 10  shows the aberration curves of the fifth embodiment of the present invention. The photographing optical lens assembly of the fifth embodiment of the present invention mainly comprises five lens elements, in order from the object side to the image side: a plastic first lens element  510  with positive refractive power having a convex object-side surface  511  and a convex image-side surface  512 , the object-side and image-side surfaces  511  and  512  thereof being aspheric; a plastic second lens element  520  with negative refractive power having a concave object-side surface  521  and a concave image-side surface  522 , the object-side and image-side surfaces  521  and  522  thereof being aspheric; a plastic third lens element  530  with positive refractive power having a concave object-side surface  531  and a convex image-side surface  532 , the object-side and image-side surfaces  531  and  532  thereof being aspheric; a plastic fourth lens element  540  with negative refractive power having a convex object-side surface  541  and a concave image-side surface  542 , the object-side and image-side surfaces  541  and  542  thereof being aspheric; and a plastic fifth lens element  550  with negative refractive power having a convex object-side surface  551  and a concave image-side surface  552 , the object-side and image-side surfaces  551  and  552  thereof being aspheric, at least one inflection point formed on the image-side surface  552 ; wherein an aperture stop  500  is disposed between the imaged object and the first lens elements  510 ; wherein an IR filter  560  is disposed between the image-side surface  552  of the fifth lens element  550  and an image plane  570 ; and wherein the IR filter  560  has no influence on the focal length of the photographing optical lens assembly. 
     The equation of the aspheric surface profiles of the fifth embodiment has the same form as that of the first embodiment. 
     In the fifth embodiment of the present photographing optical lens assembly, the focal length of the photographing optical lens assembly is f, and it satisfies the relation: f=4.06 (mm). 
     In the fifth embodiment of the present photographing optical lens assembly, the f-number of the photographing optical lens assembly is Fno, and it satisfies the relation: Fno=2.80. 
     In the fifth embodiment of the present photographing optical lens assembly, half of the maximal field of view of the photographing optical lens assembly is HFOV, and it satisfies the relation: HFOV=35.0 deg. 
     In the fifth embodiment of the present photographing optical lens assembly, the Abbe number of the first lens element  510  is V1, the Abbe number of the second lens element  520  is V2, and they satisfy the relation:
 
V1-V2=32.5.
 
     In the fifth embodiment of the present photographing optical lens assembly, the Abbe number of the third lens element  530  is V3, the Abbe number of the fourth lens element  540  is V4, and they satisfy the relation:
 
 V 3- V 4=−0.1.
 
     In the fifth embodiment of the present photographing optical lens assembly, the thickness on the optical axis of the second lens element  520  is CT2, the focal length of the photographing optical lens assembly is f, and they satisfy the relation:
 
( CT 2 /f )*10=0.74.
 
     In the fifth embodiment of the present photographing optical lens assembly, the radius of curvature of the image-side surface  522  of the second lens element  520  is R4, the focal length of the photographing optical lens assembly is f, and they satisfy the relation:
 
 R 4 /f= 0.94.
 
     In the fifth embodiment of the present photographing optical lens assembly, the focal length of the photographing optical lens assembly is f, the focal length of the first lens element  510  is f1, and they satisfy the relation:
 
 f/f 1=1.75.
 
     In the fifth embodiment of the present photographing optical lens assembly, the focal length of the photographing optical lens assembly is f, the focal length of the fifth lens element  550  is f5, and they satisfy the relation:
 
 f/f 5=−0.52.
 
     In the fifth embodiment of the present photographing optical lens assembly, the focal length of the first lens element  510  is f1, the focal length of the third lens element  530  is f3, and they satisfy the relation:
 
 f 1 /f 3=0.32.
 
     In the fifth embodiment of the present photographing optical lens assembly, the distance on the optical axis between the first lens element  510  and the second lens element  520  is T12, the focal length of the photographing optical lens assembly is f, and they satisfy the relation:
 
( T 12 /f )*100=1.23.
 
     In the fifth embodiment of the present photographing optical lens assembly, an electronic sensor is disposed at the image plane  570  for image formation. The distance on the optical axis between the aperture stop  500  and the electronic sensor is SL, the distance on the optical axis between the object-side surface  511  of the first lens element  510  and the electronic sensor is TTL, and they satisfy the relation:
 
 SL/TTL= 0.97.
 
     In the fifth embodiment of the present photographing optical lens assembly, the distance on the optical axis between the object-side surface  511  of the first lens element  510  and the electronic sensor is TTL, half of the diagonal length of the effective pixel area of the electronic sensor is ImgH, and they satisfy the relation:
 
 TTL/ImgH= 1.58.
 
     The detailed optical data of the fifth embodiment is shown in  FIG. 21  (TABLE 9), and the aspheric surface data is shown in  FIG. 22  (TABLE 10), wherein the units of the radius of curvature, the thickness and the focal length are expressed in mm, and HFOV is half of the maximal field of view. 
       FIG. 11  shows a photographing optical lens assembly in accordance with a sixth embodiment of the present invention, and  FIG. 12  shows the aberration curves of the sixth embodiment of the present invention. The photographing optical lens assembly of the sixth embodiment of the present invention mainly comprises five lens elements, in order from the object side to the image side: a plastic first lens element  610  with positive refractive power having a convex object-side surface  611  and a concave image-side surface  612 , the object-side and image-side surfaces  611  and  612  thereof being aspheric; a plastic second lens element  620  with negative refractive power having a concave object-side surface  621  and a concave image-side surface  622 , the object-side and image-side surfaces  621  and  622  thereof being aspheric; a plastic third lens element  630  with positive refractive power having a concave object-side surface  631  and a convex image-side surface  632 , the object-side and image-side surfaces  631  and  632  thereof being aspheric; a plastic fourth lens element  640  with negative refractive power having a convex object-side surface  641  and a concave image-side surface  642 , the object-side and image-side surfaces  641  and  642  thereof being aspheric; and a plastic fifth lens element  650  with positive refractive power having a convex object-side surface  651  and a concave image-side surface  652 , the object-side and image-side surfaces  651  and  652  thereof being aspheric, at least one inflection point formed on the image-side surface  652 ; wherein an aperture stop  600  is disposed between the first lens element  610  and second lens elements  620 ; wherein an IR filter  660  is disposed between the image-side surface  652  of the fifth lens element  650  and an image plane  670 ; and wherein the IR filter  660  has no influence on the focal length of the photographing optical lens assembly. 
     The equation of the aspheric surface profiles of the sixth embodiment has the same form as that of the first embodiment. 
     In the sixth embodiment of the present photographing optical lens assembly, the focal length of the photographing optical lens assembly is f, and it satisfies the relation: f=4.22 (mm). 
     In the sixth embodiment of the present photographing optical lens assembly, the f-number of the photographing optical lens assembly is Fno, and it satisfies the relation: Fno=2.78. 
     In the sixth embodiment of the present photographing optical lens assembly, half of the maximal field of view of the photographing optical lens assembly is HFOV, and it satisfies the relation: HFOV=33.7 deg. 
     In the sixth embodiment of the present photographing optical lens assembly, the Abbe number of the first lens element  610  is V1, the Abbe number of the second lens element  620  is V2, and they satisfy the relation:
 
V1-V2=32.5.
 
     In the sixth embodiment of the present photographing optical lens assembly, the Abbe number of the third lens element  630  is V3, the Abbe number of the fourth lens element  640  is V4, and they satisfy the relation:
 
 V 3- V 4=−0.1.
 
     In the sixth embodiment of the present photographing optical lens assembly, the thickness on the optical axis of the second lens element  620  is CT2, the focal length of the photographing optical lens assembly is f, and they satisfy the relation:
 
( CT 2 /f )*10=0.71.
 
     In the sixth embodiment of the present photographing optical lens assembly, the radius of curvature of the image-side surface  622  of the second lens element  620  is R4, the focal length of the photographing optical lens assembly is f, and they satisfy the relation:
 
 R 4 /f= 1.05.
 
     In the sixth embodiment of the present photographing optical lens assembly, the focal length of the photographing optical lens assembly is f, the focal length of the first lens element  610  is f1, and they satisfy the relation:
 
 f/f 1=1.19.
 
     In the sixth embodiment of the present photographing optical lens assembly, the focal length of the photographing optical lens assembly is f, the focal length of the fifth lens element  650  is f5, and they satisfy the relation:
 
 f/f 5=0.12.
 
     In the sixth embodiment of the present photographing optical lens assembly, the focal length of the first lens element  610  is f1, the focal length of the third lens element  630  is f3, and they satisfy the relation:
 
 f 1 /f 3=1.08.
 
     In the sixth embodiment of the present photographing optical lens assembly, the distance on the optical axis between the first lens element  610  and the second lens element  620  is T12, the focal length of the photographing optical lens assembly is f, and they satisfy the relation:
 
( T 12 /f )*100=5.47.
 
     In the sixth embodiment of the present photographing optical lens assembly, an electronic sensor is disposed at the image plane  670  for image formation. The distance on the optical axis between the aperture stop  600  and the electronic sensor is SL, the distance on the optical axis between the object-side surface  611  of the first lens element  610  and the electronic sensor is TTL, and they satisfy the relation:
 
 SL/TTL= 0.86.
 
     In the sixth embodiment of the present photographing optical lens assembly, the distance on the optical axis between the object-side surface  611  of the first lens element  610  and the electronic sensor is TTL, half of the diagonal length of the effective pixel area of the electronic sensor is ImgH, and they satisfy the relation:
 
 TTL/ImgH= 1.86.
 
     The detailed optical data of the sixth embodiment is shown in  FIG. 23  (TABLE 11), and the aspheric surface data is shown in  FIG. 24  (TABLE 12), wherein the units of the radius of curvature, the thickness and the focal length are expressed in mm, and HFOV is half of the maximal field of view. 
     It is to be noted that TABLES 1-12 (illustrated in  FIGS. 13-24  respectively) show different data of the different embodiments, however, the data of the different embodiments are obtained from experiments. Therefore, any photographing optical lens assembly of the same structure is considered to be within the scope of the present invention even if it uses different data. The embodiments depicted above and the appended drawings are exemplary and are not intended to limit the claim scope of the present invention. TABLE 13 (illustrated in  FIG. 25 ) shows the data of the respective embodiments resulting from the equations.