Abstract:
An optical lens system with a wide field of view comprises, in order from the object side to the image side: a first lens element with negative refractive power having a convex object-side surface and a concave image-side surface; a second lens element; a third lens element; a fourth lens element having a concave object-side surface and a convex image-side surface; a fifth lens element with positive refractive power; a sixth lens element with negative refractive power; a seventh lens element, one of an object-side surface and an image-side surface being aspheric. There are seven lens elements with refractive power. By adjusting the arrangement of curvature, refractive power of the respective lens elements and a stop, sufficient field of view can be obtained and the aberrations of the system can be corrected in order to obtain good image quality.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to an optical lens system with a wide field of view, and more particularly to a miniaturized optical lens system with a larger field of view. 
     2. Description of the Prior Art 
     In recent years, the optical lens system has been widely applied in different industries, especially in the industries of the mobile phone cameras, network cameras, automotive lenses, image monitoring, entertainment electronics and so on, and the electronic sensor of a general digital camera is typically a CCD (Charge Coupled Device) or CMOS (Complementary Metal Oxide Semiconductor) sensor. Due to advances in semiconductor manufacturing, the pixel size of sensor has been reduced continuously, and miniaturized optical lens systems have increasingly higher resolution. Therefore, there&#39;s an increasing demand for an imaging lens system with better image quality. 
     Lens systems used in vehicles, image monitoring and electronic entertainment devices usually need a larger field of view since they need to capture a wider range of images at a time. The conventional lens systems with a larger field of view mostly consist of a front lens group with negative refractive power and a rear lens group with positive refractive power, forming a so-called Inverse Telephoto structure, which can provide a wide field of view, such as the optical lens system described in U.S. Pat. No. 7,446,955. Although the Inverse Telephoto structure can obtain a wide field of view, it is difficult to correct aberrations of the system due to the fact that the rear lens group only consists of one lens element. Moreover, in recent years, with the popularity of the vehicle rear view system, the wide field of view optical lens system with a high resolution has become a trend in the market. Therefore, the present invention is aimed at providing a wide field of view optical lens system which can provide great image quality without make the total track length of the optical lens system too long. 
     The present invention mitigates and/or obviates the aforementioned disadvantages. 
     SUMMARY OF THE INVENTION 
     The primary objective of the present invention is to provide an optical lens system with a wide field of view to correct aberrations of the system and obtain good image quality. 
     An optical lens system with a wide field of view in accordance with the present invention comprises, in order from the object side to the image side: a first lens element with negative refractive power having a convex object-side surface and a concave image-side surface; a second lens element; a third lens element; a fourth lens element having a concave object-side surface and a convex image-side surface; a fifth lens element with positive refractive power; a sixth lens element with negative refractive power; a seventh lens element, at least one of an object-side and an image-side surfaces of the first lens element being aspheric. In the optical lens system with a wide field of view, there are seven lens elements with refractive power. The radius of curvature of the object-side surface of the sixth lens element is R11, the radius of curvature of the image-side surface of the sixth lens element is R12, the focal length of the optical lens system with a wide field of view is f, the focal length of the first lens element is f1, the focal length of the second lens element is f2, the focal length of the third lens element is f3, the focal length of the fourth lens element is f4, the focal length of the fifth lens element is f5, the focal length of the sixth lens element is f6, and the focal length of the seventh lens element is P. The optical lens system is further provided with a stop, the distance from the stop to an image plane along the optical axis is SL, the distance from the object-side surface of the first lens element to the image plane along the optical axis is TTL, and they satisfy the relations: −0.7&lt;(R11+R12)/(R11−R12)&lt;0.7; SUM|pow|&lt;2.5, wherein SUM|pow|=|f/f1|+|f/f2|+|f/f3|+|f/f4|+|f/f5|+|f/f6|+|f/f7|; 0.15&lt;SL/TTL&lt;0.40. Such arrangements can obtain sufficient field of view, correct aberrations of the system and obtain good image quality. 
     The first lens element with negative refractive power has a convex object-side surface and a concave image-side surface, which is favorable to enlarge the field of view of the optical lens system, improve the refraction of incident light, prevent the excessive increase of aberrations, and obtain good balance between the field of view and the aberrations of the system. 
     The fourth lens element has a concave object-side surface and a convex image-side surface, which is favorable to correct the astigmatism of the system. 
     The fifth lens element with positive refractive power can provide partial refractive power for the optical lens system, and reduce the total track length of the optical lens system. 
     The sixth lens element with negative refractive power can effectively correct aberrations of the optical lens system. 
     If (R11+R12)/(R11−R12) satisfies the relation: −0.7&lt;(R11+R12)/(R11−R12)&lt;0.7, the curvatures of the object-side and image-side surfaces of the sixth lens element are appropriate for the arrangement of the fifth and seventh lens elements, so that the total track length of the optical lens system will not be too long. 
     If SUM|pow| satisfies the relation: SUM|pow|&lt;2.5, the refractive power of the respective lens elements and the optical lens system will be appropriate, which can prevent the excessive generations of aberrations when the refractive power of any of the lens elements is excessively large. Preferably, SUM|pow| satisfies the relation: SUM|pow|&lt;2.0. 
     If SL/TTL satisfies the relation: 0.15&lt;SL/TTL&lt;0.40, the stop can be located at a favorable position for wide field of view and for better correction of the distortion and the chromatic aberration of magnification. 
     According to one aspect of the present optical lens system with a wide field of view, the second lens element with negative refractive power can function favorably with the first lens element to enlarge the field of view and correct aberrations of the optical lens system. The third lens element with positive refractive power can reduce the sensitivity of the optical lens system. The seventh lens element with positive refractive power can further reduce the total track length of the optical lens system, so as to maintain the objective of miniaturization of the optical lens system. 
     According to another aspect of the present optical lens system, if the second lens element has a convex object-side surface and a concave image-side surface, it can function favorably with the first lens element with negative refractive power having a convex object-side surface and a concave image-side surface to enlarge the field of view. If the second lens element has a concave object-side surface and a convex image-side surface, it will be favorable to correct aberrations of the optical lens system. If the third lens element has a concave object-side surface and a convex image-side surface, it will be favorable to correct astigmatism of the system. If the fifth lens element has a convex object-side surface and a concave image-side surface, it will be favorable to enhance the positive refractive power of the fifth lens element and reduce the total track length of the optical lens system. If the sixth lens element has a concave object-side surface and a concave image-side surface, it can effectively correct aberrations of the optical lens system. If the seventh lens element has a convex object-side surface, it will be favorable to correct the high order aberrations of the system. 
     According to another aspect of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the first lens element is f1, the focal length of the second lens element is f2, the focal length of the third lens element is f3, the focal length of the fourth lens element is f4, the focal length of the fifth lens element is f5, the focal length of the sixth lens element is f6, and the focal length of the seventh lens element is f7, and they satisfy the relations: P5=|f/f5|, P6=|f/f6|, P7=|f/f7|, SUM|pow|=|f/f1|+|f/f2|+|f/f3|+|f/f4|+|f/f5|+|f/f6|+|f/f7|. If (P5+P6+P7)/(SUM|pow|) satisfies the relation: 0.5&lt;(P5+P6+P7)/(SUM|pow|)&lt;1.0, the distribution of the refractive power of the last three lens elements (the fifth, sixth and seventh lens elements) will be appropriate, which can effectively correct various aberrations of the optical lens system. Preferably, (P5+P6+P7)/(SUM|pow|) satisfies the relation:
 
0.65&lt;( P 5 +P 6 +P 7)/(SUM|pow|)&lt;0.80.
 
     According to another aspect of the present optical lens system, the first lens element is made of glass, and the refractive index of the first lens element is N1. If N1 satisfies the relation: N1&gt;1.70, the material of the first lens element will be appropriate, which can prevent the generation of excessive aberrations in case of a wide field of view. 
     According to another aspect of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, and a distance on an optical axis between the fourth lens element and the fifth lens element is T45. If T45/f satisfies the relation: 2.0&lt;T45/f&lt;3.5, there will be enough space between the fourth lens element and the fifth lens element to allow the fourth lens element to be adjusted to an optimal position within the system. 
     According to another aspect of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, and the focal length of the fourth lens element is f4. If |f/f4| satisfies the relation: |f/f4|&lt;0.2, the refractive power of the fourth lens elements can effectively correct aberrations of the optical lens system. Preferably, |f/f4| satisfies the relation: |f/f4|&lt;0.1, the refractive power of the fourth lens elements will be appropriate, which can effectively correct aberrations of the optical lens system. 
     According to another aspect of the present optical lens system, the distance between the object-side surface of the fifth lens element and the image-side surface of the seventh lens element is Dr9r14, and the distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element is Td. If Dr9r14/Td satisfies the relation: 0.07&lt;Dr9r14/Td&lt;0.25, the rear lens group (from the fifth lens element to the seventh lens element) has a better configuration, which can effectively reduce the total track length of the optical lens system. Preferably, Dr9r14/Td satisfies the relation: 0.12&lt;Dr9r14/Td&lt;0.18. 
     According to another aspect of the present optical lens system, the Abbe number of the sixth lens element is V6, and the Abbe number of the seventh lens element is V7. If V7−V6 satisfies the relation: 28.0&lt;V7−V6&lt;40.0, it can allow better correction of the chromatic aberration of the optical lens system. 
     According to another aspect of the present optical lens system, the distance between the object-side surface of the first lens element and the object-side surface of the third lens element is Dr1r5, and the distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element is Td. If Dr1r5/Td satisfies the relation: 0.5&lt;Dr1r5/Td&lt;0.8, the first lens element and the second lens element can effectively moderate aberrations of the optical lens system. 
     According to another aspect of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, and the focal length of the first lens element is f4. If f/f1 satisfies the relation: −0.3&lt;f/f1&lt;−0.1, the refractive power of the first lens element will be appropriate, which can effectively enhance the feature of wide field of view and provide a larger field of view. 
     According to another aspect of the present optical lens system, the radius of curvature of the object-side surface of the fourth lens element is R7, and the radius of curvature of the image-side surface of the fourth lens element is R8. If |(R7+R8)/(R7−R8)| satisfies the relation: 4.5&lt;|(R7+R8)/(R7−R8)|&lt;9.0, the curvature of the object-side and image-side surfaces of the fourth lens element can effectively correct the astigmatism of the system. 
     According to another aspect of the present optical lens system, the radius of curvature of the object-side surface of the second lens element is R3, and the radius of curvature of the image-side surface of the second lens element is R4. If R3/R4 satisfies the relation: 0.75&lt;R3/R4&lt;1.2, it can enhance the aberrations correction effect of the second lens element. 
     According to another aspect of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, and the focal length of the second lens element is f2. If |f/f2| satisfies the relation: |f/f2|&lt;0.2, the second lens element can function with the first lens element to avoid producing too many aberrations while providing a wide field of view. 
     The present invention will be presented in further details from the following descriptions with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiments in accordance with the present invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1A  shows an optical lens system in accordance with a first embodiment of the present invention; 
         FIG. 1B  shows the longitudinal spherical aberration curves, the astigmatic field curves, and the distortion curve of the first embodiment of the present invention; 
         FIG. 2A  shows an optical lens system in accordance with a second embodiment of the present invention; 
         FIG. 2B  shows the longitudinal spherical aberration curves, the astigmatic field curves, and the distortion curve of the second embodiment of the present invention; 
         FIG. 3A  shows an optical lens system in accordance with a third embodiment of the present invention; 
         FIG. 3B  shows the longitudinal spherical aberration curves, the astigmatic field curves, and the distortion curve of the third embodiment of the present invention; 
         FIG. 4A  shows an optical lens system in accordance with a fourth embodiment of the present invention; 
         FIG. 4B  shows the longitudinal spherical aberration curves, the astigmatic field curves, and the distortion curve of the fourth embodiment of the present invention; 
         FIG. 5A  shows an optical lens system in accordance with a fifth embodiment of the present invention; and 
         FIG. 5B  shows the longitudinal spherical aberration curves, the astigmatic field curves, and the distortion curve of the fifth embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring to  FIG. 1A , which shows an optical lens system with a wide field of view in accordance with a first embodiment of the present invention, and  FIG. 1B  shows the longitudinal spherical aberration curves, the astigmatic field curves, and the distortion curve of the first embodiment of the present invention. An optical lens system with a wide field of view in accordance with the first embodiment of the present invention comprises, in order from the object side to the image side: 
     A first lens element  110  with negative refractive power made of glass has a convex object-side surface  111  and a concave image-side surface  112 . 
     A second lens element  120  with positive refractive power made of plastic has a concave object-side surface  121  and a convex image-side surface  122 , and the object-side surface  121  and the image-side surface  122  of the second lens element  120  are aspheric. 
     A third lens element  130  with positive refractive power made of glass has a convex object-side surface  131  and a convex image-side surface  132 . 
     A fourth lens element  140  with negative refractive power made of plastic has a concave object-side surface  141  and a convex image-side surface  142 , and the object-side surface  141  and the image-side surface  142  of the fourth lens element  140  are aspheric. 
     A fifth lens element  150  with positive refractive power made of plastic has a convex object-side surface  151  and a convex image-side surface  152 , and the object-side surface  151  and the image-side surface  152  of the fifth lens element  150  are aspheric. 
     A sixth lens element  160  with negative refractive power made of plastic has a concave object-side surface  161  and a concave image-side surface  162 , and the object-side surface  161  and the image-side surface  162  of the sixth lens element  160  are aspheric. 
     A seventh lens element  170  with positive refractive power made of plastic has a convex object-side surface  171  and a convex image-side surface  172 , and the object-side surface  171  and the image-side surface  172  of the seventh lens element  170  are aspheric. 
     A stop  100  is located between the fifth lens element  150  and the sixth lens element  160 . 
     An IR cut filter  180  made of glass is located between the image-side surface  172  of the seventh lens element  170  and an image plane  190  and has no influence on the focal length of the optical lens system. 
     A cover glass  181  made of glass is located between the IR cut filter  180  and the image plane  190  to protect a sensor (not shown), and has no influence on the focal length of the optical lens system. 
     In the first embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, and it satisfies the relation:
 
 f= 1.04.
 
     In the first embodiment of the present optical lens system, the f-number of the optical lens system with a wide field of view is Fno, and it satisfies the relation:
 
 Fno= 2.08.
 
     In the first embodiment of the present optical lens system, half of the maximal field of view is HFOV, and it satisfies the relation:
 
 HFOV= 60.4.
 
     In the first embodiment of the present optical lens system, the Abbe number of the seventh lens element  170  is V7, the Abbe number of the sixth lens element  160  is V6, and they satisfy the relation:
 
| V 7 −V 6|=32.90.
 
     In the first embodiment of the present optical lens system, the radius of curvature of the object-side surface  121  of the second lens element  120  is R3, the radius of curvature of the image-side surface  122  of the second lens element  120  is R4, and they satisfy the relation:
 
 R 3 /R 4=0.85.
 
     In the first embodiment of the present optical lens system, the radius of curvature of the object-side surface  141  of the fourth lens element  140  is R7, the radius of curvature of the image-side surface  142  of the fourth lens element  140  is R8, and they satisfy the relation:
 
|( R 7 +R 8)/( R 7 −R 8)|=5.42.
 
     In the first embodiment of the present optical lens system, the radius of curvature of the object-side surface  161  of the sixth lens element  160  is R11, the radius of curvature of the image-side surface  162  of the sixth lens element  160  is R12, and they satisfy the relation:
 
( R 11 +R 12)/( R 11 −R 12)=0.34.
 
     In the first embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the distance on the optical axis between the fourth lens element  140  and the fifth lens element  150  is T45, and they satisfy the relation:
 
 T 45 /f= 0.12.
 
     In the first embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the first lens element  110  is f1, and they satisfy the relation:
 
 f/f 1=−0.23.
 
     In the first embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the second lens element  120  is f2, and they satisfy the relation:
 
| f/f 2|=0.04.
 
     In the first embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the fourth lens element  140  is f4, and they satisfy the relation:
 
| f/f 4|=0.04.
 
     In the first embodiment of the present optical lens system, the distance between the object-side surface  111  of the first lens element  110  and the object-side surface  131  of the third lens element  130  is Dr1r5, the distance between the object-side surface  111  of the first lens element  110  and the image-side surface  172  of the seventh lens element  170  is Td, and they satisfy the relation:
 
 Dr 1 r 5 /Td =0.68.
 
     In the first embodiment of the present optical lens system, the distance between the object-side surface  151  of the fifth lens element  150  and the image-side surface  172  of the seventh lens element  170  is Dr9r14, and the distance between the object-side surface  111  of the first lens element  110  and the image-side surface  172  of the seventh lens element  170  is Td, and they satisfy the relation:
 
 Dr 9 r 14 /Td =0.14.
 
     In the first embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the first lens element  110  is f1, the focal length of the second lens element  120  is f2, the focal length of the third lens element  130  is f3, the focal length of the fourth lens element  140  is f4, the focal length of the fifth lens element  150  is f5, the focal length of the sixth lens element  160  is f6, the focal length of the seventh lens element  170  is f7, SUM|pow|=|f/f1|+|f/f2|+|f/f3|+|f/f4|+|f/f5|+|f/f6|+|f/f7|, and they satisfy the relation:
 
SUM|pow|=1.73.
 
     In the first embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the first lens element  110  is f1, the focal length of the second lens element  120  is f2, the focal length of the third lens element  130  is f3, the focal length of the fourth lens element  140  is f4, the focal length of the fifth lens element  150  is f5, the focal length of the sixth lens element  160  is f6, the focal length of the seventh lens element  170  is f7, P5=|f/f5|, P6=|f/f6|, P7=|f/f7|, SUM|pow|=|f/f1|+|f/f2|+|f/f3|+|f/f4|+|f/f5|+|f/f6|+|f/f7|, and they satisfy the relation:
 
( P 5 +P 6 +P 7)/(SUM|pow|)=0.74.
 
     In the first embodiment of the present optical lens system, the distance from the stop  100  to the image plane  190  along the optical axis  191  is SL, the distance from the object-side surface  111  of the first lens element  110  to the image plane  190  along the optical axis  191  is TTL, and they satisfy the relation:
 
 SL/TTL= 0.20.
 
     The detailed optical data of the first embodiment is shown in table 1, and the aspheric surface data is shown in table 2, wherein the units of the radius of curvature, the thickness and the focal length are expressed in mm. 
     
       
         
               
             
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
           
               
                 TABLE 1 
               
             
             
               
                   
               
               
                 (Embodiment 1) 
               
               
                 f(focal length) = 1.04 mm, Fno = 2.08, HFOV (half of field of view) = 60.4 deg. 
               
             
          
           
               
                 Surface # 
                   
                 Curvature Radius 
                 Thickness 
                 Material 
                 Index 
                 Abbe # 
                 Focal length 
               
               
                   
               
             
          
           
               
                 0 
                 Object 
                 Plano 
                 Infinity 
                   
                   
                   
                   
               
               
                 1 
                 Lens 1 
                 23.9554 
                 0.800 
                 Glass 
                 1.804 
                 46.5 
                 −4.54 
               
               
                 2 
                   
                  3.1191 
                 3.068 
               
             
          
           
               
                 3 
                 Lens 2 
                 −2.49791 
                 (ASP) 
                 2.355 
                 Plastic 
                 1.633 
                 23.4 
                 25.62 
               
               
                 4 
                   
                 −2.95528 
                 (ASP) 
                 2.432 
               
             
          
           
               
                 5 
                 Lens 3 
                 12.9244 
                 1.150 
                 Glass 
                 1.517 
                 64.2 
                 7.86 
               
               
                 6 
                   
                 −5.7404 
                 0.100 
               
             
          
           
               
                 7 
                 Lens 4 
                 −2.91828 
                 (ASP) 
                 0.927 
                 Plastic 
                 1.535 
                 56.3 
                 −23.22 
               
               
                 8 
                   
                 −4.23760 
                 (ASP) 
                 0.122 
               
               
                 9 
                 Lens 5 
                 3.36830 
                 (ASP) 
                 0.631 
                 Plastic 
                 1.535 
                 56.3 
                 2.33 
               
               
                 10 
                   
                 −1.85125 
                 (ASP) 
                 0.100 
               
             
          
           
               
                 11 
                 Stop 
                 Plano 
                 0.100 
                   
                   
                   
                   
               
             
          
           
               
                 12 
                 Lens 6 
                 −4.07630 
                 (ASP) 
                 0.450 
                 Plastic 
                 1.633 
                 23.4 
                 −2.07 
               
               
                 13 
                   
                 2.01899 
                 (ASP) 
                 0.102 
               
               
                 14 
                 Lens 7 
                 2.16367 
                 (ASP) 
                 0.450 
                 Plastic 
                 1.535 
                 56.3 
                 3.07 
               
               
                 15 
                   
                 −6.27750 
                 (ASP) 
                 0.500 
               
             
          
           
               
                 16 
                 IR-filter 
                 Plano 
                 0.300 
                 Glass 
                 1.517 
                 64.2 
                   
               
               
                 17 
                   
                 Plano 
                 0.500 
               
               
                 18 
                 Cover-glass 
                 Plano 
                 0.400 
                 Glass 
                 1.517 
                 64.2 
               
               
                 19 
                   
                 Plano 
                 0.385 
               
               
                 20 
                 Image 
                 Plano 
               
               
                   
               
               
                 Note: 
               
               
                 reference wavelength is: d-line 587.6 nm, and the diameter of the effective aperture of the surface # 8 is 1.883 mm. 
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 2 
               
               
                   
               
               
                 Aspheric Coefficients 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Surface # 
                 3 
                 4 
                 7 
                 8 
                 9 
               
               
                   
               
               
                 k = 
                 −4.05761E+00 
                 −3.45086E+00 
                 −2.06355E−01 
                 −1.68071E+01 
                 −2.66733E+01 
               
               
                 A4 = 
                 −4.61866E−03 
                 −5.46999E−03 
                 −2.16687E−02 
                 5.59359E−02 
                 2.19869E−01 
               
               
                 A6 = 
                 3.80250E−04 
                 3.17206E−04 
                 4.69580E−02 
                 1.00053E−02 
                 −1.79373E−01 
               
               
                 A8 = 
                 −4.51368E−05 
                 −1.56938E−05 
                 −1.61291E−02 
                 2.25917E−02 
                 1.15331E−01 
               
               
                 A10 = 
                 3.14577E−06 
                 5.19202E−07 
                 1.71009E−03 
                 −1.89280E−02 
                 −1.26740E−01 
               
               
                   
               
               
                 Surface # 
                 10 
                 12 
                 13 
                 14 
                 15 
               
               
                   
               
               
                 k = 
                 −4.31394E+00 
                 −4.55257E+01 
                 −8.58818E+00 
                 −1.41156E+01 
                 2.22020E+01 
               
               
                 A4 = 
                 1.11579E−01 
                 −9.34202E−02 
                 −1.72997E−01 
                 2.65296E−01 
                 4.05117E−01 
               
               
                 A6 = 
                 −2.59933E−01 
                 −5.49754E−02 
                 −1.52281E−02 
                 −2.57219E−01 
                 −2.29317E−02 
               
               
                 A8 = 
                 1.93885E−01 
                 7.83217E−01 
                 1.30678E+00 
                 5.44699E−01 
                 −2.70912E−02 
               
               
                 A10 = 
                 −8.96668E−02 
                 −8.22802E−01 
                 −1.38068E+00 
                 −4.69459E−01 
                 −1.06369E−01 
               
               
                   
               
             
          
         
       
     
     Referring to  FIG. 2A , which shows an optical lens system with a wide field of view in accordance with a second embodiment of the present invention, and  FIG. 2B  shows the longitudinal spherical aberration curves, the astigmatic field curves, and the distortion curve of the second embodiment of the present invention. The second embodiment of the present invention comprises, in order from the object side to the image side: 
     A first lens element  210  with negative refractive power made of glass has a convex object-side surface  211  and a concave image-side surface  212 . 
     A second lens element  220  with negative refractive power made of glass has a convex object-side surface  221  and a concave image-side surface  222 . 
     A third lens element  230  with positive refractive power made of plastic has a concave object-side surface  231  and a convex image-side surface  232 , and the object-side surface  231  and the image-side surface  232  of the third lens element  230  are aspheric. 
     A fourth lens element  240  with positive refractive power made of plastic has a concave object-side surface  241  and a convex image-side surface  242 , and the object-side surface  241  and the image-side surface  242  of the fourth lens element  240  are aspheric. 
     A fifth lens element  250  with positive refractive power made of plastic has a convex object-side surface  251  and a convex image-side surface  252 , and the object-side surface  251  and the image-side surface  252  of the fifth lens element  250  are aspheric. 
     A sixth lens element  260  with negative refractive power made of plastic has a concave object-side surface  261  and a concave image-side surface  262 , and the object-side surface  261  and the image-side surface  262  of the fourth lens element  260  are aspheric. 
     A seventh lens element  270  with positive refractive power made of plastic has a convex object-side surface  271  and a convex image-side surface  272 , and the object-side surface  271  and the image-side surface  272  of the seventh lens element  270  are aspheric. 
     A stop  200  is located between the fourth lens element  240  and the fifth lens element  250 . 
     An IR cut filter  280  made of glass is located between the image-side surface  272  of the seventh lens element  270  and an image plane  290  and has no influence on the focal length of the optical lens system. 
     A cover glass  281  made of glass is located between the IR cut filter  280  and the image plane  290  to protect a sensor (not shown), and has no influence on the focal length of the optical lens system. 
     In the second embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, and it satisfies the relation:
 
 f= 0.92.
 
     In the second embodiment of the present optical lens system, the f-number of the optical lens system with a wide field of view is Fno, and it satisfies the relation:
 
 Fno= 2.05.
 
     In the second embodiment of the present optical lens system, half of the maximal field of view is HFOV, and it satisfies the relation:
 
 HFOV= 60.3.
 
     In the second embodiment of the present optical lens system, the Abbe number of the seventh lens element  270  is V7, the Abbe number of the sixth lens element  260  is V6, and they satisfy the relation:
 
| V 7 −V 6|=32.50.
 
     In the second embodiment of the present optical lens system, the radius of curvature of the object-side surface  221  of the second lens element  220  is R3, the radius of curvature of the image-side surface  222  of the second lens element  220  is R4, and they satisfy the relation:
 
 R 3 /R 4=9.48.
 
     In the second embodiment of the present optical lens system, the radius of curvature of the object-side surface  241  of the fourth lens element  240  is R7, the radius of curvature of the image-side surface  242  of the fourth lens element  240  is R8, and they satisfy the relation:
 
|( R 7 +R 8)/( R 7 −R 8)|=8.45.
 
     In the second embodiment of the present optical lens system, the radius of curvature of the object-side surface  261  of the sixth lens element  260  is R11, the radius of curvature of the image-side surface  262  of the sixth lens element  260  is R12, and they satisfy the relation:
 
( R 11 +R 12)/( R 11 −R 12)=−0.34.
 
     In the second embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the distance on the optical axis between the fourth lens element  240  and the fifth lens element  250  is T45, and they satisfy the relation:
 
 T 45 /f= 2.37.
 
     In the second embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the first lens element  210  is f1, and they satisfy the relation:
 
 f/f 1=−0.15.
 
     In the second embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the second lens element  220  is f2, and they satisfy the relation:
 
| f/f 2|=0.21.
 
     In the second embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the fourth lens element  240  is f4, and they satisfy the relation:
 
 |f/f 4|=0.06.
 
     In the second embodiment of the present optical lens system, the distance between the object-side surface  211  of the first lens element  210  and the object-side surface  231  of the third lens element  230  is Dr1r5, the distance between the object-side surface  211  of the first lens element  210  and the image-side surface  272  of the seventh lens element  270  is Td, and they satisfy the relation:
 
 Dr 1 r 5 /Td= 0.35.
 
     In the second embodiment of the present optical lens system, the distance between the object-side surface  251  of the fifth lens element  250  and the image-side surface  272  of the seventh lens element  270  is Dr9r14, and the distance between the object-side surface  211  of the first lens element  210  and the image-side surface  272  of the seventh lens element  270  is Td, and they satisfy the relation:
 
 Dr 9 r 14 /Td =0.15.
 
     In the second embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the first lens element  210  is f1, the focal length of the second lens element  220  is f2, the focal length of the third lens element  230  is f3, the focal length of the fourth lens element  240  is f4, the focal length of the fifth lens element  250  is f5, the focal length of the sixth lens element  260  is f6, the focal length of the seventh lens element  270  is f7, SUM|pow|=|f/f1|+|f/f2|+|f/f3|+|f/f4|+|f/f5|+|f/f6|+|f/f7|, and they satisfy the relation:
 
SUM|pow|=1.65.
 
     In the second embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the first lens element  210  is f1, the focal length of the second lens element  220  is f2, the focal length of the third lens element  230  is f3, the focal length of the fourth lens element  240  is f4, the focal length of the fifth lens element  250  is f5, the focal length of the sixth lens element  260  is f6, the focal length of the seventh lens element  270  is f7, P5=|f/f5|, P6=|f/f6|, P7=|f/f7|, SUM|pow|=|f/f1|+|f/f2|+|f/f3|+|f/f4|+|f/f5|+|f/f6|+|f/f7|, and they satisfy the relation:
 
( P 5 +P 6+ P 7)/(SUM|pow|)=0.69.
 
     In the second embodiment of the present optical lens system, the distance from the stop  200  to the image plane  290  along the optical axis  291  is SL, the distance from the object-side surface  211  of the first lens element  210  to the image plane  290  along the optical axis  291  is TTL, and they satisfy the relation:
 
 SL/TTL= 0.26.
 
     The detailed optical data of the second embodiment is shown in table 3, and the aspheric surface data is shown in table 4, wherein the units of the radius of curvature, the thickness and the focal length are expressed in mm. 
     
       
         
               
             
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
           
               
                 TABLE 3 
               
             
             
               
                   
               
               
                 (Embodiment 2) 
               
               
                 f(focal length) = 0.92 mm, Fno = 2.05, HFOV (half of field of view) = 60.3 deg. 
               
             
          
           
               
                 Surface # 
                   
                 Curvature Radius 
                 Thickness 
                 Material 
                 Index 
                 Abbe # 
                 Focal length 
               
               
                   
               
             
          
           
               
                 0 
                 Object 
                 Plano 
                 Infinity 
                   
                   
                   
                   
               
               
                 1 
                 Lens 1 
                 7.8242 
                 0.800 
                 Glass 
                 1.804 
                 46.5 
                 −6.23 
               
               
                 2 
                   
                 2.9164 
                 2.020 
               
               
                 3 
                 Lens 2 
                 26.4861  
                 0.800 
                 Glass 
                 1.729 
                 54.5 
                 −4.34 
               
               
                 4 
                   
                 2.7935 
                 0.900 
               
             
          
           
               
                 5 
                 Lens 3 
                 −6.90340 
                 (ASP) 
                 1.940 
                 Plastic 
                 1.632 
                 23.4 
                 9.52 
               
               
                 6 
                   
                 −3.56470 
                 (ASP) 
                 0.419 
               
               
                 7 
                 Lens 4 
                 −4.03370 
                 (ASP) 
                 2.000 
                 Plastic 
                 1.544 
                 55.9 
                 15.12 
               
               
                 8 
                   
                 −3.17980 
                 (ASP) 
                 2.079 
               
             
          
           
               
                 9 
                 Stop 
                 Plano 
                 0.100 
                   
                   
                   
                   
               
             
          
           
               
                 10 
                 Lens 5 
                 2.08950 
                 (ASP) 
                 0.771 
                 Plastic 
                 1.544 
                 55.9 
                 1.74 
               
               
                 11 
                   
                 −1.50586 
                 (ASP) 
                 0.100 
               
               
                 12 
                 Lens 6 
                 −2.07789 
                 (ASP) 
                 0.450 
                 Plastic 
                 1.632 
                 23.4 
                 −2.14 
               
               
                 13 
                   
                 4.19640 
                 (ASP) 
                 0.100 
               
               
                 14 
                 Lens 7 
                 15.24220 
                 (ASP) 
                 0.479 
                 Plastic 
                 1.544 
                 55.9 
                 5.43 
               
               
                 15 
                   
                 −3.62830 
                 (ASP) 
                 0.500 
               
             
          
           
               
                 16 
                 IR-filter 
                 Plano 
                 0.300 
                 Glass 
                 1.517 
                 64.2 
                   
               
               
                 17 
                   
                 Plano 
                 0.500 
               
               
                 18 
                 Cover-glass 
                 Plano 
                 0.400 
                 Glass 
                 1.517 
                 64.2 
               
               
                 19 
                   
                 Plano 
                 0.316 
               
               
                 20 
                 Image 
                 Plano 
               
               
                   
               
               
                 Note: 
               
               
                 reference wavelength is: d-line 587.6 nm. 
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 4 
               
               
                   
               
               
                 Aspheric Coefficients 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Surface # 
                 5 
                 6 
                 7 
                 8 
                 10 
               
               
                   
               
               
                 k = 
                 −5.00000E+01 
                 −1.00864E+01 
                 7.50423E−01 
                 −5.24959E−01 
                 9.29473E−02 
               
               
                 A4 = 
                 1.89598E−02 
                 2.51495E−04 
                 1.69123E−03 
                 1.73493E−03 
                 1.97014E−02 
               
               
                 A6 = 
                 −6.76222E−04 
                 3.31961E−03 
                 2.71617E−03 
                 2.89335E−03 
                 −4.06788E−02 
               
               
                 A8 = 
                 −2.63523E−05 
                 −1.05598E−03 
                 −3.00081E−04 
                 −8.40675E−04 
                 1.00646E−01 
               
               
                 A10 = 
                 3.17227E−05 
                 1.96781E−04 
                 1.06273E−04 
                 1.19946E−04 
                 −2.24553E−01 
               
               
                   
               
               
                 Surface # 
                 11 
                 12 
                 13 
                 14 
                 15 
               
               
                   
               
               
                 k = 
                 −1.65332E+00 
                 −1.53641E+01 
                 2.33459E+00 
                 4.93451E+01 
                 −4.34300E+00 
               
               
                 A4 = 
                 1.67417E−01 
                 −1.93452E−01 
                 −1.23876E−01 
                 3.12734E−01 
                 3.28044E−01 
               
               
                 A6 = 
                 −2.65303E−01 
                 1.11435E−01 
                 1.40265E−01 
                 5.58464E−03 
                 1.37213E−01 
               
               
                 A8 = 
                 −3.25895E−02 
                 −2.21060E−01 
                 7.38231E−02 
                 −6.06858E−02 
                 −7.51222E−02 
               
               
                 A10 = 
                 4.34582E−02 
                 2.13943E−01 
                 −7.25735E−02 
                 2.42413E−02 
                 1.09873E−02 
               
               
                   
               
             
          
         
       
     
     Referring to  FIG. 3A , which shows an optical lens system with a wide field of view in accordance with a third embodiment of the present invention, and  FIG. 3B  shows the longitudinal spherical aberration curves, the astigmatic field curves, and the distortion curve of the third embodiment of the present invention. The third embodiment of the present invention comprises, in order from the object side to the image side: 
     A first lens element  310  with negative refractive power made of glass has a convex object-side surface  311  and a concave image-side surface  312 . 
     A second lens element  320  with positive refractive power made of plastic has a concave object-side surface  321  and a convex image-side surface  322 , and the object-side surface  321  and the image-side surface  322  of the second lens element  320  are aspheric. 
     A third lens element  330  with positive refractive power made of glass has a convex object-side surface  331  and a convex image-side surface  332 . 
     A fourth lens element  340  with negative refractive power made of plastic has a concave object-side surface  341  and a convex image-side surface  342 , and the object-side surface  341  and the image-side surface  342  of the fourth lens element  140  are aspheric. 
     A fifth lens element  350  with positive refractive power made of plastic has a convex object-side surface  351  and a convex image-side surface  352 , and the object-side surface  351  and the image-side surface  352  of the fifth lens element  350  are aspheric. 
     A sixth lens element  360  with negative refractive power made of plastic has a concave object-side surface  361  and a concave image-side surface  362 , and the object-side surface  361  and the image-side surface  362  of the fourth lens element  360  are aspheric. 
     A seventh lens element  370  with positive refractive power made of plastic has a convex object-side surface  371  and a convex image-side surface  372 , and the object-side surface  371  and the image-side surface  372  of the seventh lens element  370  are aspheric. 
     A stop  300  is located between the fifth lens element  350  and the sixth lens element  360 . 
     An IR cut filter  380  made of glass is located between the image-side surface  372  of the seventh lens element  370  and an image plane  390  and has no influence on the focal length of the optical lens system. 
     A cover glass  381  made of glass is located between the IR cut filter  380  and the image plane  390  to protect a sensor (not shown), and has no influence on the focal length of the optical lens system. 
     In the third embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, and it satisfies the relation:
 
 f= 1.05.
 
     In the third embodiment of the present optical lens system, the f-number of the optical lens system with a wide field of view is Fno, and it satisfies the relation:
 
 Fno= 2.08.
 
     In the third embodiment of the present optical lens system, half of the maximal field of view is HFOV, and it satisfies the relation:
 
 HFOV= 60.3.
 
     In the third embodiment of the present optical lens system, the Abbe number of the seventh lens element  370  is V7, the Abbe number of the sixth lens element  360  is V6, and they satisfy the relation:
 
| V 7 −V 6|=32.50.
 
     In the third embodiment of the present optical lens system, the radius of curvature of the object-side surface  321  of the second lens element  320  is R3, the radius of curvature of the image-side surface  322  of the second lens element  320  is R4, and they satisfy the relation:
 
 R 3 /R 4=0.85.
 
     In the third embodiment of the present optical lens system, the radius of curvature of the object-side surface  341  of the fourth lens element  340  is R7, the radius of curvature of the image-side surface  342  of the fourth lens element  340  is R8, and they satisfy the relation:
 
|( R 7 +R 8)/( R 7 −R 8)|=5.35.
 
     In the third embodiment of the present optical lens system, the radius of curvature of the object-side surface  361  of the sixth lens element  360  is R11, the radius of curvature of the image-side surface  362  of the sixth lens element  360  is R12, and they satisfy the relation:
 
( R 11 +R 12)/( R 11 −R 12)=0.29.
 
     In the third embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the distance on the optical axis between the fourth lens element  340  and the fifth lens element  350  is T45, and they satisfy the relation:
 
 T 45 /f= 0.11.
 
     In the third embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the first lens element  310  is f1, and they satisfy the relation:
 
 f/f 1=−0.23.
 
     In the third embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the second lens element  320  is f2, and they satisfy the relation:
 
| f/f 2|=0.04.
 
     In the third embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the fourth lens element  340  is f4, and they satisfy the relation:
 
| f/f 4|=0.05.
 
     In the third embodiment of the present optical lens system, the distance between the object-side surface  311  of the first lens element  310  and the object-side surface  331  of the third lens element  330  is Dr1r5, the distance between the object-side surface  311  of the first lens element  310  and the image-side surface  372  of the seventh lens element  370  is Td, and they satisfy the relation:
 
 Dr 1 r 5 /Td= 0.67.
 
     In the third embodiment of the present optical lens system, the distance between the object-side surface  351  of the fifth lens element  350  and the image-side surface  372  of the seventh lens element  370  is Dr9r14, and the distance between the object-side surface  311  of the first lens element  310  and the image-side surface  372  of the seventh lens element  370  is Td, and they satisfy the relation:
 
 Dr 9 r 14 /Td= 0.14.
 
     In the third embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the first lens element  310  is f1, the focal length of the second lens element  320  is f2, the focal length of the third lens element  330  is f3, the focal length of the fourth lens element  340  is f4, the focal length of the fifth lens element  350  is f5, the focal length of the sixth lens element  360  is f6, the focal length of the seventh lens element  370  is f7, SUM|pow|=|f/f1|+|f/f2|+|f/f3|+|f/f4|+|f/f5|+|f/f6|+|f/f7|, and they satisfy the relation:
 
SUM|pow|=1.77.
 
     In the third embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the first lens element  310  is f1, the focal length of the second lens element  320  is f2, the focal length of the third lens element  330  is f3, the focal length of the fourth lens element  340  is f4, the focal length of the fifth lens element  350  is f5, the focal length of the sixth lens element  360  is f6, the focal length of the seventh lens element  370  is f7, P5=|f/f5|, P6=|f/f6|, P7=|f/f7|, SUM|pow|=|f/f1|+|f/f2|+|f/f3|+|f/f4|+|f/f5|+|f/f6|+|f/f7|, and they satisfy the relation:
 
( P 5 +P 6 +P 7)/(SUM|pow|)=0.74.
 
     In the third embodiment of the present optical lens system, the distance from the stop  300  to the image plane  390  along the optical axis  391  is SL, the distance from the object-side surface  311  of the first lens element  310  to the image plane  390  along the optical axis  391  is TTL, and they satisfy the relation:
 
 SL/TTL= 0.20.
 
     The detailed optical data of the third embodiment is shown in table 5, and the aspheric surface data is shown in table 6, wherein the units of the radius of curvature, the thickness and the focal length are expressed in mm. 
     
       
         
               
             
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
           
               
                 TABLE 5 
               
             
             
               
                   
               
               
                 (Embodiment 3) 
               
               
                 f(focal length) = 1.05 mm, Fno = 2.08, HFOV (half of field of view) = 60.3 deg. 
               
             
          
           
               
                 Surface # 
                   
                 Curvature Radius 
                 Thickness 
                 Material 
                 Index 
                 Abbe # 
                 Focal length 
               
               
                   
               
             
          
           
               
                 0 
                 Object 
                 Plano 
                 Infinity 
                   
                   
                   
                   
               
               
                 1 
                 Lens 1 
                 23.9554 
                 0.800 
                 Glass 
                 1.804 
                 46.5 
                 −4.54 
               
               
                 2 
                   
                  3.1191 
                 3.076 
               
             
          
           
               
                 3 
                 Lens 2 
                 −2.50494 
                 (ASP) 
                 2.339 
                 Plastic 
                 1.634 
                 23.8 
                 24.56 
               
               
                 4 
                   
                 −2.93955 
                 (ASP) 
                 2.399 
               
             
          
           
               
                 5 
                 Lens 3 
                 12.9244 
                 1.150 
                 Glass 
                 1.517 
                 64.2 
                 7.86 
               
               
                 6 
                   
                 −5.7404 
                 0.110 
               
             
          
           
               
                 7 
                 Lens 4 
                 −2.88656 
                 (ASP) 
                 0.962 
                 Plastic 
                 1.535 
                 56.3 
                 −22.93 
               
               
                 8 
                   
                 −4.21420 
                 (ASP) 
                 0.119 
               
               
                 9 
                 Lens 5 
                 3.33280 
                 (ASP) 
                 0.636 
                 Plastic 
                 1.535 
                 56.3 
                 2.32 
               
               
                 10 
                   
                 −1.84624 
                 (ASP) 
                 0.100 
               
             
          
           
               
                 11 
                 Stop 
                 Plano 
                 0.100 
                   
                   
                   
                   
               
             
          
           
               
                 12 
                 Lens 6 
                 −3.73570 
                 (ASP) 
                 0.448 
                 Plastic 
                 1.634 
                 23.8 
                 −2.03 
               
               
                 13 
                   
                 2.06123 
                 (ASP) 
                 0.099 
               
               
                 14 
                 Lens 7 
                 2.07471 
                 (ASP) 
                 0.446 
                 Plastic 
                 1.535 
                 56.3 
                 3.01 
               
               
                 15 
                   
                 −6.63370 
                 (ASP) 
                 0.500 
               
             
          
           
               
                 16 
                 IR-filter 
                 Plano 
                 0.300 
                 Glass 
                 1.517 
                 64.2 
                   
               
               
                 17 
                   
                 Plano 
                 0.500 
               
               
                 18 
                 Cover-glass 
                 Plano 
                 0.400 
                 Glass 
                 1.517 
                 64.2 
               
               
                 19 
                   
                 Plano 
                 0.393 
               
               
                 20 
                 Image 
                 Plano 
               
               
                   
               
               
                 Note: 
               
               
                 reference wavelength is: d-line 587.6 nm, and the diameter of the effective aperture of the surface # 8 is 1.996 mm. 
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 6 
               
               
                   
               
               
                 Aspheric Coefficients 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Surface # 
                 3 
                 4 
                 7 
                 8 
                 9 
               
               
                   
               
               
                 k = 
                 −4.02505E+00 
                 −3.37773E+00 
                 −2.03484E−01 
                 −1.62042E+01 
                 −2.63862E+01 
               
               
                 A4 = 
                 −4.70283E−03 
                 −5.47274E−03 
                 −2.16422E−02 
                 5.58245E−02 
                 2.19908E−01 
               
               
                 A6 = 
                 3.79444E−04 
                 3.16412E−04 
                 4.68355E−02 
                 1.00879E−02 
                 −1.78916E−01 
               
               
                 A8 = 
                 −4.47309E−05 
                 −1.58171E−05 
                 −1.62055E−02 
                 2.25307E−02 
                 1.15994E−01 
               
               
                 A10 = 
                 3.01900E−06 
                 5.02587E−07 
                 1.76786E−03 
                 −1.88785E−02 
                 −1.26046E−01 
               
               
                   
               
               
                 Surface # 
                 10 
                 12 
                 13 
                 14 
                 15 
               
               
                   
               
               
                 k = 
                 −4.34375E+00 
                 −4.11699E+01 
                 −8.96095E+00 
                 −1.40644E+01 
                 2.59327E+01 
               
               
                 A4 = 
                 1.11391E−01 
                 −9.28528E−02 
                 −1.75368E−01 
                 2.64802E−01 
                 4.01764E−01 
               
               
                 A6 = 
                 −2.60448E−01 
                 −5.20602E−02 
                 −1.81425E−02 
                 −2.63285E−01 
                 −2.87011E−02 
               
               
                 A8 = 
                 1.94917E−01 
                 7.57643E−01 
                 1.30045E+00 
                 5.39437E−01 
                 −3.71912E−02 
               
               
                 A10 = 
                 −8.97405E−02 
                 −7.76902E−01 
                 −1.35367E+00 
                 −4.61152E−01 
                 −9.73450E−02 
               
               
                   
               
             
          
         
       
     
     Referring to  FIG. 4A , which shows an optical lens system with a wide field of view in accordance with a fourth embodiment of the present invention, and  FIG. 4B  shows the longitudinal spherical aberration curves, the astigmatic field curves, and the distortion curve of the fourth embodiment of the present invention. The fourth embodiment of the present invention comprises, in order from the object side to the image side: 
     A first lens element  410  with negative refractive power made of glass has a convex object-side surface  411  and a concave image-side surface  412 . 
     A second lens element  420  with positive refractive power made of plastic has a concave object-side surface  421  and a convex image-side surface  422 , and the object-side surface  421  and the image-side surface  422  of the second lens element  420  are aspheric. 
     A third lens element  430  with positive refractive power made of plastic has a concave object-side surface  431  and a convex image-side surface  432 , and the object-side surface  431  and the image-side surface  432  of the third lens element  430  are aspheric. 
     A fourth lens element  440  with positive refractive power made of plastic has a concave object-side surface  441  and a convex image-side surface  442 , and the object-side surface  441  and the image-side surface  442  of the fourth lens element  440  are aspheric. 
     A fifth lens element  450  with positive refractive power made of plastic has a convex object-side surface  451  and a convex image-side surface  452 , and the object-side surface  451  and the image-side surface  452  of the fifth lens element  450  are aspheric. 
     A sixth lens element  460  with negative refractive power made of plastic has a concave object-side surface  461  and a concave image-side surface  462 , and the object-side surface  461  and the image-side surface  462  of the fourth lens element  460  are aspheric. 
     A seventh lens element  470  with positive refractive power made of plastic has a convex object-side surface  471  and a convex image-side surface  472 , and the object-side surface  471  and the image-side surface  472  of the seventh lens element  470  are aspheric. 
     A stop  400  is located between the fifth lens element  450  and the sixth lens element  460 . 
     An IR cut filter  480  made of glass is located between the image-side surface  472  of the seventh lens element  470  and an image plane  490  and has no influence on the focal length of the optical lens system. 
     A cover glass  481  made of glass is located between the IR cut filter  480  and the image plane  490  to protect a sensor (not shown), and has no influence on the focal length of the optical lens system. 
     In the fourth embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, and it satisfies the relation:
 
 f= 1.03.
 
     In the fourth embodiment of the present optical lens system, the f-number of the optical lens system with a wide field of view is Fno, and it satisfies the relation:
 
 Fno= 2.50.
 
     In the fourth embodiment of the present optical lens system, half of the maximal field of view is HFOV, and it satisfies the relation:
 
 HFOV= 60.0.
 
     In the fourth embodiment of the present optical lens system, the Abbe number of the seventh lens element  470  is V7, the Abbe number of the sixth lens element  160  is V6, and they satisfy the relation:
 
| V 7 −V 6|=32.50.
 
     In the fourth embodiment of the present optical lens system, the radius of curvature of the object-side surface  421  of the second lens element  420  is R3, the radius of curvature of the image-side surface  422  of the second lens element  420  is R4, and they satisfy the relation:
 
 R 3 /R 4=0.99.
 
     In the fourth embodiment of the present optical lens system, the radius of curvature of the object-side surface  441  of the fourth lens element  440  is R7, the radius of curvature of the image-side surface  442  of the fourth lens element  440  is R8, and they satisfy the relation:
 
|( R 7 +R 8)/( R 7 −R 8)|=6.15.
 
     In the fourth embodiment of the present optical lens system, the radius of curvature of the object-side surface  461  of the sixth lens element  460  is R11, the radius of curvature of the image-side surface  462  of the sixth lens element  460  is R12, and they satisfy the relation:
 
( R 11 +R 12)/( R 11 −R 12)=0.01.
 
     In the fourth embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the distance on the optical axis between the fourth lens element  440  and the fifth lens element  450  is T45, and they satisfy the relation:
 
 T 45 /f= 0.24.
 
     In the fourth embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the first lens element  410  is f1, and they satisfy the relation:
 
 f/f 1=−0.21.
 
     In the fourth embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the second lens element  420  is f2, and they satisfy the relation:
 
| f/f 2|=0.08.
 
     In the fourth embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the fourth lens element  440  is f4, and they satisfy the relation:
 
| f/f 4|=0.12.
 
     In the fourth embodiment of the present optical lens system, the distance between the object-side surface  411  of the first lens element  410  and the object-side surface  431  of the third lens element  430  is Dr1r5, the distance between the object-side surface  411  of the first lens element  410  and the image-side surface  472  of the seventh lens element  470  is Td, and they satisfy the relation:
 
 Dr 1 r 5 /Td =0.56.
 
     In the fourth embodiment of the present optical lens system, the distance between the object-side surface  451  of the fifth lens element  450  and the image-side surface  472  of the seventh lens element  470  is Dr9r14, and the distance between the object-side surface  411  of the first lens element  410  and the image-side surface  472  of the seventh lens element  470  is Td, and they satisfy the relation:
 
 Dr 9 r 14 /Td =0.16.
 
     In the fourth embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the first lens element  410  is f1, the focal length of the second lens element  420  is f2, the focal length of the third lens element  430  is f3, the focal length of the fourth lens element  440  is f4, the focal length of the fifth lens element  450  is f5, the focal length of the sixth lens element  460  is f6, the focal length of the seventh lens element  470  is f7, SUM|pow|=|f/f1|+|f/f2|+|f/f3|+|f/f4|+|f/f5|+|f/f6|+|f/f7|, and they satisfy the relation:
 
SUM|pow|=1.76.
 
     In the fourth embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the first lens element  410  is f1, the focal length of the second lens element  420  is f2, the focal length of the third lens element  430  is f3, the focal length of the fourth lens element  440  is f4, the focal length of the fifth lens element  450  is f5, the focal length of the sixth lens element  460  is f6, the focal length of the seventh lens element  470  is f7, P5=|f/f5|, P6=|f/f6|, P7=|f/f7|, SUM|pow|=|f/f1|+|f/f2|+|f/f3|+|f/f4|+|f/f5|+|f/f6|+|f/f7|, and they satisfy the relation:
 
( P 5 +P 6 +P 7)/(SUM|pow|)=0.75.
 
     In the fourth embodiment of the present optical lens system, the distance from the stop  400  to the image plane  490  along the optical axis  491  is SL, the distance from the object-side surface  411  of the first lens element  410  to the image plane  490  along the optical axis  491  is TTL, and they satisfy the relation:
 
 SL/TTL =0.20.
 
     The detailed optical data of the fourth embodiment is shown in table 7, and the aspheric surface data is shown in table 8, wherein the units of the radius of curvature, the thickness and the focal length are expressed in mm. 
     
       
         
               
             
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
           
               
                 TABLE 7 
               
             
             
               
                   
               
               
                 (Embodiment 4) 
               
               
                 f(focal length) = 1.03 mm, Fno = 2.50, HFOV (half of field of view) = 60.0 deg. 
               
             
          
           
               
                 Surface # 
                   
                 Curvature Radius 
                 Thickness 
                 Material 
                 Index 
                 Abbe # 
                 Focal length 
               
               
                   
               
             
          
           
               
                 0 
                 Object 
                 Plano 
                 Infinity 
                   
                   
                   
                   
               
               
                 1 
                 Lens 1 
                 8.2806 
                 0.600 
                 Glass 
                 1.804 
                 46.5 
                 −4.86 
               
               
                 2 
                   
                 2.5701 
                 2.974 
               
             
          
           
               
                 3 
                 Lens 2 
                 −2.99968 
                 (ASP) 
                 2.985 
                 Plastic 
                 1.634 
                 23.8 
                 12.53 
               
               
                 4 
                   
                 −3.01850 
                 (ASP) 
                 0.790 
               
               
                 5 
                 Lens 3 
                 −5.81640 
                 (ASP) 
                 2.000 
                 Plastic 
                 1.514 
                 56.8 
                 34.80 
               
               
                 6 
                   
                 −4.90040 
                 (ASP) 
                 0.459 
               
               
                 7 
                 Lens 4 
                 −2.62378 
                 (ASP) 
                 1.021 
                 Plastic 
                 1.535 
                 56.3 
                 8.52 
               
               
                 8 
                   
                 −1.89034 
                 (ASP) 
                 0.247 
               
               
                 9 
                 Lens 5 
                 3.50480 
                 (ASP) 
                 0.648 
                 Plastic 
                 1.535 
                 56.3 
                 2.62 
               
               
                 10 
                   
                 −2.18613 
                 (ASP) 
                 0.100 
               
             
          
           
               
                 11 
                 Stop 
                 Plano 
                 0.141 
                   
                   
                   
                   
               
             
          
           
               
                 12 
                 Lens 6 
                 −2.36134 
                 (ASP) 
                 0.450 
                 Plastic 
                 1.634 
                 23.8 
                 −1.78 
               
               
                 13 
                   
                 2.32679 
                 (ASP) 
                 0.141 
               
               
                 14 
                 Lens 7 
                 1.74047 
                 (ASP) 
                 0.644 
                 Plastic 
                 1.535 
                 56.3 
                 3.04 
               
               
                 15 
                   
                 −20.91760 
                 (ASP) 
                 0.500 
               
             
          
           
               
                 16 
                 IR-filter 
                 Plano 
                 0.300 
                 Glass 
                 1.517 
                 64.2 
                   
               
               
                 17 
                   
                 Plano 
                 0.500 
               
               
                 18 
                 Cover-glass 
                 Plano 
                 0.400 
                 Glass 
                 1.517 
                 64.2 
               
               
                 19 
                   
                 Plano 
                 0.203 
               
               
                 20 
                 Image 
                 Plano 
               
               
                   
               
               
                 Note: 
               
               
                 reference wavelength is d-line 587.6 nm. 
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
               
               
               
             
           
               
                 TABLE 8 
               
               
                   
               
               
                 Aspheric Coefficients 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Surface # 
                 3 
                 4 
                 5 
                 6 
                 7 
                 8 
               
               
                   
               
               
                 k = 
                 −4.37071E+00 
                 −4.09300E+00 
                 −6.73818E+00 
                 −1.22065E+00 
                 −1.56864E−01 
                 −8.71891E+00 
               
               
                 A4 = 
                 5.99077E−05 
                 −3.37026E−03 
                 6.27302E−03 
                 2.68087E−03 
                 −2.26904E−02 
                 4.34455E−02 
               
               
                 A6 = 
                 −3.17286E−04 
                 4.53348E−04 
                 1.17562E−03 
                 3.09539E−03 
                 4.67449E−02 
                 1.20813E−02 
               
               
                 A8 = 
                 3.05789E−05 
                 −3.16145E−05 
                 5.13661E−05 
                 −5.08434E−04 
                 −1.33691E−02 
                 2.16894E−02 
               
               
                 A10 = 
                 6.54054E−08 
                 3.25519E−06 
                 1.96501E−06 
                 3.59641E−04 
                 1.55924E−03 
                 −5.99210E−03 
               
               
                 A12 = 
                   
                   
                 −6.02646E−22 
                 −6.02646E−22 
               
               
                   
               
               
                 Surface # 
                 9 
                 10 
                 12 
                 13 
                 14 
                 15 
               
               
                   
               
               
                 k = 
                 −3.08794E+00 
                 −3.69920E+00 
                 −2.47796E+01 
                 5.75325E+00 
                 −8.59103E+00 
                 −2.50993E+01 
               
               
                 A4 = 
                 2.52380E−01 
                 1.13614E−01 
                 −3.34741E−02 
                 3.63822E−02 
                 2.98136E−01 
                 2.18110E−01 
               
               
                 A6 = 
                 −1.44331E−01 
                 −1.66250E−01 
                 2.95108E−02 
                 −3.39804E−01 
                 −2.56938E−01 
                 1.07945E−01 
               
               
                 A8 = 
                 1.42767E−01 
                 2.25415E−01 
                 −3.41542E−01 
                 7.14727E−01 
                 2.95929E−01 
                 −1.64111E−01 
               
               
                 A10 = 
                 −3.58446E−02 
                 −1.22418E−01 
                 6.52349E−01 
                 −6.77588E−01 
                 −1.34025E−01 
                 1.38419E−01 
               
               
                   
               
             
          
         
       
     
     Referring to  FIG. 5A , which shows an optical lens system with a wide field of view in accordance with a fifth embodiment of the present invention, and  FIG. 5B  shows the longitudinal spherical aberration curves, the astigmatic field curves, and the distortion curve of the fifth embodiment of the present invention. The fifth embodiment of the present invention comprises, in order from the object side to the image side: 
     A first lens element  510  with negative refractive power made of glass has a convex object-side surface  511  and a concave image-side surface  512 . 
     A second lens element  520  with negative refractive power made of plastic has a convex object-side surface  521  and a concave image-side surface  522 , and the object-side surface  521  and the image-side surface  522  of the second lens element  520  are aspheric. 
     A third lens element  530  with positive refractive power made of plastic has a concave object-side surface  531  and a convex image-side surface  532 , and the object-side surface  531  and the image-side surface  532  of the third lens element  530  are aspheric. 
     A fourth lens element  540  with negative refractive power made of plastic has a concave object-side surface  541  and a convex image-side surface  542 , and the object-side surface  541  and the image-side surface  542  of the fourth lens element  540  are aspheric. 
     A fifth lens element  550  with positive refractive power made of plastic has a convex object-side surface  551  and a convex image-side surface  552 , and the object-side surface  551  and the image-side surface  552  of the fifth lens element  550  are aspheric. 
     A sixth lens element  560  with negative refractive power made of plastic has a concave object-side surface  561  and a concave image-side surface  562 , and the object-side surface  561  and the image-side surface  562  of the fourth lens element  560  are aspheric. 
     A seventh lens element  570  with positive refractive power made of plastic has a convex object-side surface  571  and a convex image-side surface  572 , and the object-side surface  571  and the image-side surface  572  of the seventh lens element  570  are aspheric. 
     A stop  500  is located between the fourth lens element  540  and the fifth lens element  550 . 
     An IR cut filter  580  made of glass is located between the image-side surface  572  of the seventh lens element  570  and an image plane  590  and has no influence on the focal length of the optical lens system. 
     A cover glass  581  made of glass is located between the IR cut filter  580  and the image plane  590  to protect a sensor (not shown), and has no influence on the focal length of the optical lens system. 
     In the fifth embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, and it satisfies the relation:
 
 f= 0.89.
 
     In the fifth embodiment of the present optical lens system, the f-number of the optical lens system with a wide field of view is Fno, and it satisfies the relation:
 
 Fno= 2.40.
 
     In the fifth embodiment of the present optical lens system, half of the maximal field of view is HFOV, and it satisfies the relation:
 
 HFOV= 59.9.
 
     In the fifth embodiment of the present optical lens system, the Abbe number of the seventh lens element  570  is V7, the Abbe number of the sixth lens element  160  is V6, and they satisfy the relation:
 
| V 7 −V 6|=32.50.
 
     In the fifth embodiment of the present optical lens system, the radius of curvature of the object-side surface  521  of the second lens element  520  is R3, the radius of curvature of the image-side surface  522  of the second lens element  520  is R4, and they satisfy the relation:
 
 R 3 /R 4=3.93.
 
     In the fifth embodiment of the present optical lens system, the radius of curvature of the object-side surface  541  of the fourth lens element  540  is R7, the radius of curvature of the image-side surface  542  of the fourth lens element  540  is R8, and they satisfy the relation:
 
|( R 7 +R 8)/( R 7 −R 8)|=7.41.
 
     In the fifth embodiment of the present optical lens system, the radius of curvature of the object-side surface  561  of the sixth lens element  560  is R11, the radius of curvature of the image-side surface  562  of the sixth lens element  560  is R12, and they satisfy the relation:
 
( R 11 +R 12)/( R 11 −R 12)=−0.56.
 
     In the fifth embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the distance on the optical axis between the fourth lens element  540  and the fifth lens element  550  is T45, and they satisfy the relation:
 
 T 45 /f= 2.94.
 
     In the fifth embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the first lens element  510  is f1, and they satisfy the relation:
 
 f/f 1=−0.17.
 
     In the fifth embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the second lens element  520  is f2, and they satisfy the relation:
 
| f/f 2|=0.22.
 
     In the fifth embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the fourth lens element  540  is f4, and they satisfy the relation:
 
| f/f 4|=0.01.
 
     In the fifth embodiment of the present optical lens system, the distance between the object-side surface  511  of the first lens element  510  and the object-side surface  531  of the third lens element  530  is Dr1r5, the distance between the object-side surface  111  of the first lens element  110  and the image-side surface  572  of the seventh lens element  570  is Td, and they satisfy the relation:
 
 Dr 1 r 5 /Td =0.37.
 
     In the fifth embodiment of the present optical lens system, the distance between the object-side surface  551  of the fifth lens element  550  and the image-side surface  572  of the seventh lens element  570  is Dr9r14, and the distance between the object-side surface  111  of the first lens element  510  and the image-side surface  572  of the seventh lens element  570  is Td, and they satisfy the relation:
 
 Dr 9 r 14 /Td =0.14.
 
     In the fifth embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the first lens element  510  is f1, the focal length of the second lens element  520  is f2, the focal length of the third lens element  530  is f3, the focal length of the fourth lens element  540  is f4, the focal length of the fifth lens element  550  is f5, the focal length of the sixth lens element  560  is f6, the focal length of the seventh lens element  570  is f7, SUM|pow|=|f/f1|+|f/f2|+|f/f3|+|f/f4|+|f/f5|+|f/f6|+|f/f7|, and they satisfy the relation:
 
SUM|pow|=1.89.
 
     In the fifth embodiment of the present optical lens system, the focal length of the optical lens system with a wide field of view is f, the focal length of the first lens element  510  is f1, the focal length of the second lens element  520  is f2, the focal length of the third lens element  530  is f3, the focal length of the fourth lens element  540  is f4, the focal length of the fifth lens element  550  is f5, the focal length of the sixth lens element  560  is f6, the focal length of the seventh lens element  570  is f7, P5=|f/f5|, P6=|f/f6|, P7=|f/f7|, SUM|pow|=|f/f1|+|f/f2|+|f/f3|+|f/f4|+|f/f5|+|f/f6|+|f/f7|, and they satisfy the relation:
 
( P 5 +P 6 +P 7)/(SUM|pow|)=0.68.
 
     In the fifth embodiment of the present optical lens system, the distance from the stop  500  to the image plane  590  along the optical axis  591  is SL, the distance from the object-side surface  511  of the first lens element  510  to the image plane  590  along the optical axis  591  is TTL, and they satisfy the relation:
 
 SL/TTL= 0.25.
 
     The detailed optical data of the fifth embodiment is shown in table 9, and the aspheric surface data is shown in table 10, wherein the units of the radius of curvature, the thickness and the focal length are expressed in mm. 
     
       
         
               
             
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
             
           
               
                 TABLE 9 
               
             
             
               
                   
               
               
                 (Embodiment 5) 
               
               
                 f(focal length) = 0.89 mm, Fno = 2.40, HFOV (half of field of view) = 59.9 deg. 
               
             
          
           
               
                 Surface # 
                   
                 Curvature Radius 
                 Thickness 
                 Material 
                 Index 
                 Abbe # 
                 Focal length 
               
               
                   
               
             
          
           
               
                 0 
                 Object 
                 Plano 
                 Infinity 
                   
                   
                   
                   
               
               
                 1 
                 Lens 1 
                 12.38   
                 0.600 
                 Glass 
                 1.804 
                 46.5 
                 −5.32 
               
               
                 2 
                   
                 3.1111 
                 1.206 
               
             
          
           
               
                 3 
                 Lens 2 
                 7.09060 
                 (ASP) 
                 1.185 
                 Plastic 
                 1.650 
                 21.4 
                 −4.09 
               
               
                 4 
                   
                 1.80548 
                 (ASP) 
                 1.779 
               
               
                 5 
                 Lens 3 
                 −21.83890 
                 (ASP) 
                 2.000 
                 Plastic 
                 1.632 
                 23.4 
                 4.39 
               
               
                 6 
                   
                 −2.54743 
                 (ASP) 
                 0.200 
               
               
                 7 
                 Lens 4 
                 −2.53957 
                 (ASP) 
                 1.564 
                 Plastic 
                 1.544 
                 55.9 
                 −64.42 
               
               
                 8 
                   
                 −3.33210 
                 (ASP) 
                 2.521 
               
             
          
           
               
                 9 
                 Stop 
                 Plano 
                 0.100 
                   
                   
                   
                   
               
             
          
           
               
                 10 
                 Lens 5 
                 2.13239 
                 (ASP) 
                 0.710 
                 Plastic 
                 1.544 
                 55.9 
                 1.61 
               
               
                 11 
                   
                 −1.31589 
                 (ASP) 
                 0.100 
               
               
                 12 
                 Lens 6 
                 −1.43108 
                 (ASP) 
                 0.400 
                 Plastic 
                 1.632 
                 23.4 
                 −1.73 
               
               
                 13 
                   
                 5.09880 
                 (ASP) 
                 0.140 
               
               
                 14 
                 Lens 7 
                 5.16900 
                 (ASP) 
                 0.495 
                 Plastic 
                 1.544 
                 55.9 
                 4.00 
               
               
                 15 
                   
                 −3.63800 
                 (ASP) 
                 0.500 
               
             
          
           
               
                 16 
                 IR-filter 
                 Plano 
                 0.300 
                 Glass 
                 1.517 
                 64.2 
                   
               
               
                 17 
                   
                 Plano 
                 0.500 
               
               
                 18 
                 Cover-glass 
                 Plano 
                 0.400 
                 Glass 
                 1.517 
                 64.2 
               
               
                 19 
                   
                 Plano 
                 0.303 
               
               
                 20 
                 Image 
                 Plano 
               
               
                   
               
               
                 Note: 
               
               
                 reference wavelength is: d-line 587.6 nm. 
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
               
               
               
             
           
               
                 TABLE 10 
               
               
                   
               
               
                 Aspheric Coefficients 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Surface # 
                 3 
                 4 
                 5 
                 6 
                 7 
                 8 
               
               
                   
               
               
                 k = 
                 1.84790E+00 
                 −4.72228E−01 
                 3.63256E+01 
                 −4.06719E+00 
                 3.14946E−02 
                 3.57157E−02 
               
               
                 A4 = 
                 1.36527E−02 
                 1.54865E−02 
                 1.01988E−02 
                 −9.42704E−03 
                 9.91560E−03 
                 −1.53775E−03 
               
               
                 A6 = 
                 −2.36178E−03 
                 −1.26499E−03 
                 −7.32888E−05 
                 3.06422E−03 
                 3.50636E−03 
                 2.67240E−03 
               
               
                 A8 = 
                 1.42795E−04 
                 −2.19906E−03 
                 −8.83046E−04 
                 −9.70423E−04 
                 −3.90101E−04 
                 −5.64163E−04 
               
               
                 A10 = 
                 1.14455E−06 
                 4.02116E−04 
                 1.01882E−04 
                 1.53891E−04 
                 1.04051E−04 
                 4.53251E−05 
               
               
                 A12 = 
                 -2.38591E−22 
                 −2.38608E−22 
               
               
                   
               
               
                 Surface # 
                 10 
                 11 
                 12 
                 13 
                 14 
                 15 
               
               
                   
               
               
                 k = 
                 −2.25149E+00 
                 −5.93244E−01 
                 −8.92417E+00 
                 1.14290E+01 
                 −5.00000E+01 
                 −1.16549E+01 
               
               
                 A4 = 
                 −9.21522E−03 
                 1.23860E−01 
                 −2.55268E−01 
                 −6.26611E−02 
                 3.26812E−01 
                 3.29132E−01 
               
               
                 A6 = 
                 −1.77711E−01 
                 −4.93134E−01 
                 3.13135E−01 
                 2.33412E−01 
                 8.69100E−03 
                 1.30054E−01 
               
               
                 A8 = 
                 2.64277E−01 
                 2.54477E−01 
                 −4.02039E−01 
                 −2.22027E−02 
                 −1.08273E−01 
                 −1.13089E−01 
               
               
                 A10 = 
                 −9.95569E−01 
                 −2.37170E−01 
                 2.80532E−01 
                 −1.44414E−01 
                 5.16139E−02 
                 3.51237E−02 
               
               
                   
               
             
          
         
       
     
     
       
         
               
               
               
               
               
               
             
               
               
               
               
               
               
             
           
               
                   
                 TABLE 11 
               
               
                   
                   
               
               
                   
                 Embodiment 1 
                 Embodiment 2 
                 Embodiment 3 
                 Embodiment 4 
                 Embodiment 5 
               
               
                   
                   
               
             
             
               
                   
               
             
          
           
               
                 f 
                 1.04 
                 0.92 
                 1.05 
                 1.03 
                 0.89 
               
               
                 Fno 
                 2.08 
                 2.05 
                 2.08 
                 2.50 
                 2.40 
               
               
                 HFOV 
                 60.4 
                 60.3 
                 60.3 
                 60.0 
                 59.9 
               
               
                 V7 − V6 
                 32.90 
                 32.50 
                 32.50 
                 32.50 
                 32.50 
               
               
                 R3/R4 
                 0.85 
                 9.48 
                 0.85 
                 0.99 
                 3.93 
               
               
                 |(R7 + R8)/ 
                 5.42 
                 8.45 
                 5.35 
                 6.15 
                 7.41 
               
               
                 (R7 − R8)| 
               
               
                 (R11 + R12)/ 
                 0.34 
                 −0.34 
                 0.29 
                 0.01 
                 −0.56 
               
               
                 (R11 − R12) 
               
               
                 T45/f 
                 0.12 
                 2.37 
                 0.11 
                 0.24 
                 2.94 
               
               
                 f/f1 
                 −0.23 
                 −0.15 
                 −0.23 
                 −0.21 
                 −0.17 
               
               
                 |f/f2| 
                 0.04 
                 0.21 
                 0.04 
                 0.08 
                 0.22 
               
               
                 |f/f4| 
                 0.04 
                 0.06 
                 0.05 
                 0.12 
                 0.01 
               
               
                 Dr1r5/Td 
                 0.68 
                 0.35 
                 0.67 
                 0.56 
                 0.37 
               
               
                 Dr9r14/Td 
                 0.14 
                 0.15 
                 0.14 
                 0.16 
                 0.14 
               
               
                 SUM|pow| 
                 1.73 
                 1.65 
                 1.77 
                 1.76 
                 1.89 
               
               
                 (P5 + P6 + P7)/ 
                 0.74 
                 0.69 
                 0.74 
                 0.75 
                 0.68 
               
               
                 (SUM|pow|) 
               
               
                 SL/TTL 
                 0.20 
                 0.26 
                 0.20 
                 0.20 
                 0.25 
               
               
                   
               
             
          
         
       
     
     It is to be noted that the tables 1-10 show different data from the different embodiments, however, the data of the different embodiments is obtained from experiments. Therefore, any product of the same structure is deemed to be within the scope of the present invention even if it uses different data. Table 11 lists the relevant data for the various embodiments of the present invention. 
     While we have shown and described various embodiments in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.