Camera Lens
The present disclosure is related to a camera lens, and more particularly to a camera lens comprising 6 lenses. In recent years, a variety of cameras equipped with CCD, CMOS or other camera elements are widely popular. Along with the development of miniature and high performance camera elements, the ultrathin and high-luminous flux (Fno) wide-angle camera lenses with excellent optical properties are needed in society. The technology related to the camera lens composed of six ultra-thin, high-luminous flux f value (Fno) wide angle lenses with excellent optical properties is developed gradually. The camera lens mentioned in the proposal is composed of 6 lenses, lined up from the object side as follows: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, a sixth lens with negative refractive power. The camera lens in embodiments 1 to 3 in the special published bulletin No. 2014-052631 is composed of 6 lenses described above, but the distribution of the refractive power of the second lens and the shape of the third lens are inadequate, therefore TTL/IH≧1.941, and ultrathin degree is not sufficient. The camera lens disclosed in embodiments 1 to 3 of Japan patent document No. 5651881 is composed of 6 lenses, but, the distribution of the refractive power of the second lens and the third lens, the shape of the second lens are inadequate, therefore TTL/IH≧1.464 and ultrathin degree is not sufficient. Therefore, it is necessary to provide a new camera lens to overcome the problems mentioned above. Many aspects of the embodiments can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. The camera lens LA of the present invention is described with the embodiments as follows. The symbols in all embodiments are represented as follows. In addition, the unit of the distance, radius and center thickness is mm.
The present invention will hereinafter be described in detail with reference to exemplary embodiments. To make the technical problems to be solved, technical solutions and beneficial effects of present disclosure more apparent, the present disclosure is described in further detail together with the figures and the embodiments. It should be understood the specific embodiments described hereby is only to explain this disclosure, not intended to limit this disclosure. The camera lens in one embodiment of the present invention is explained with design drawings. The first lens L1 has positive refractive power. The second lens L2 has negative refractive power. The third lens L3 has negative refractive power. The fourth lens L4 has positive refractive power. The fifth lens L5 has positive refractive power. The sixth lens L6 has negative refractive power. In order to correct aberration better, the surface of six lenses is best designed to be non-spherical shape. The camera lens LA satisfies the following specific conditions (1)-(4). In which,
The condition (1) specifies the positive refractive power of the first lens L1. When exceeding the lower limit value of the condition (1), although in favor of the ultra-thin development of the lens, the first lens L1 has too big positive refractive power, and it is difficult to correct the aberration and other issues. On the contrary, when exceeding the upper limit, the first lens has too small positive refractive power, not conducive to the ultrathin development of lens. In addition, the limit of condition (1) is better set within the range of the condition (1-A) as follows. The condition (2) specifies the negative refractive power of the third lens L3. If exceeding the limit of the condition (2), along with Fno≦2.2 ultra-thin and wide-angle development of the lens, it is difficult to correct magnification chromatic aberration. The condition (3) specifies the shape of the second lens L2. If exceeding the limit of the condition (3), along with Fno≦2.2 ultra-thin and wide-angle development of the lens, it is difficult to correct the axial chromatic aberration. In addition, the limit of condition (3) is better set within the range of the condition (3-A) as follows. The condition (4) specifies the shape of the third lens L3. If exceeding the limit of the condition (4), along with Fno≦2.2 ultra-thin and wide-angle development of the lens, it is difficult to correct magnification chromatic aberration. In addition, the limit of condition (4) is better set within the range of the condition (4-A) as follows. The first lens L1 has positive refractive power and satisfies the following condition (5). In which,
The condition (5) specifies the negative refractive power of the second lens L2. If exceeding the limit of the condition (5), along with Fno≦2.2 ultra-thin and wide-angle development of the lens, it is difficult to correct the axial chromatic aberration. The first lens L1 has positive refractive power and satisfies the following condition (6). In which
The condition (6) specifies the shape of the first lens L1. If exceeding the limit of the condition (6), along with Fno≦2.2 ultra-thin and wide-angle development of the lens, it is difficult to correct the spherical aberration and other higher aberration issues. As six lenses of the camera lens LA have the structure described previously and meet all conditions, the camera lens composed of six TTL (optical length)/IH (image height)≦1.45, ultrathin, wide-angle 2ω≧76°, high-luminous flux Fno≦2.2 lenses with excellent optical properties can be produced. The camera lens LA of the present invention is described with the embodiments as follows. The symbols in all embodiments are represented as follows. In addition, the unit of the distance, radius and center thickness is mm.
In which, R is the axial curvature radius; k is the cone constant; A4, A6, A8, A10, A12, A14, A16 are aspherical coefficients. As a matter of convenience, the aspheric surface of all lenses adopts the aspheric surface in condition (7). But not limited to the polynomial forms of the aspheric surface in condition (7). The values of the embodiments 1˜3 and the corresponding values of the parameters specified in the conditions (1)˜(6) are listed in table 7. As shown in table 7, the embodiment 1 satisfies the conditions (1)-(6). As shown in table 7, the embodiment 2 satisfies the conditions (1)-(6). As shown in table 7, the embodiment 3 satisfies the conditions (1)-(6). The values of the embodiments and the corresponding values of the parameters specified in conditions (1) to (7) are listed in table 7. In addition, the units in table 7 are 2ω(°), f(m m), f1( It is to be understood, however, that even though numerous characteristics and advantages of the present embodiments have been set forth in the foregoing description, together with details of the structures and functions of the embodiments, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed. A camera lens includes, lined up from the object side to the image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power. The camera lens satisfies specific conditions. 1. A camera lens comprising, lined up from the object side to the image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power; wherein
the camera lens has satisfies the following conditions (1)-(4):
In which,
f: Overall focal distance of the camera lens; f1: The focal distance of the first lens L1; f3: The focal distance of the third lens L3; R3: The object side curvature radius of the second lens L2; R4: The image side curvature radius of the second lens L2; R5: The object side curvature radius of the third lens L3; R6: The image side curvature radius of the third lens L3. 2. The camera lens according to In which
f: Overall focal distance of the camera lens; f2: The focal distance of the second lens L2. 3. The camera lens according to In which,
R1: The object side curvature radius of the first lens L1; R2: The image side curvature radius of the first lens L1.FIELD OF THE INVENTION
DESCRIPTION OF RELATED ART
BRIEF DESCRIPTION OF THE DRAWINGS
DESCRIPTION OF SYMBOLS
DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS
0.74
−10.00
2.00≦(
−4.00<(
0.76
2.10≦(
−4.00≦(
−2.00
−1.55≦(Embodiment
Embodiment 1
S1 ∞ d0= −0.370 R1 1.76496 d1= 0.728 nd1 1.5831 v 1 59.39 R2 8.67532 d2= 0.059 R3 8.52752 d3= 0.248 nd2 1.6448 v 2 22.44 R4 3.28049 d4= 0.512 R5 −5.19223 d5= 0.229 nd3 1.6397 v 3 23.53 R6 −6.93210 d6= 0.044 R7 13.25596 d7= 0.465 nd4 1.5441 v 4 56.12 R8 −42.16130 d8= 0.467 R9 −4.88948 d9= 0.449 nd5 1.5352 v 5 56.12 R10 −1.56414 d10= 0.659 R11 −3.49408 d11= 0.328 nd6 1.5352 v 6 56.12 R12 2.99351 d12= 0.525 R13 ∞ d13= 0.210 nd7 1.5168 v 6 64.17 R14 ∞ d14= 0.352 Cone Constant Aspherical Coefficient k A4 A6 A8 A10 A12 A14 A16 R1 −2.6457E−01 7.1806E−03 6.3309E−03 −2.6993E−03 1.8000E−03 −1.8153E−04 8.0948E−04 −4.0201E−04 R2 0.0000E+00 −5.9373E−03 −2.7016E−03 8.0058E−03 3.2154E−03 −2.4778E−03 −6.6869E−03 3.2767E−03 R3 −5.1420E+00 −7.6154E−03 7.0223E−03 6.6977E−03 2.8608E−03 −1.9035E−03 −6.9415E−03 3.1617E−03 R4 −2.4752E−01 1.6986E−02 1.0499E−02 1.1448E−02 3.5142E−03 7.6755E−04 1.2648E−03 2.1145E−03 R5 1.4945E+01 −5.2018E−03 −2.7645E−02 5.3154E−03 1.2701E−02 4.6451E−03 −2.0111E−03 1.6147E−03 R6 2.2863E+01 −1.3414E−02 −1.4755E−02 6.6927E−03 7.2883E−03 2.5651E−03 −9.8356E−05 −5.8412E−04 R7 0.0000E+00 −5.2967E−02 9.0012E−03 4.1528E−03 6.6717E−04 −3.4350E−04 −2.9085E−04 4.8092E−05 R8 0.0000E+00 −4.6841E−02 3.2202E−04 6.1492E−04 −9.9929E−05 5.0849E−05 5.9897E−05 3.8758E−06 R9 5.6021E+00 −2.0491E−02 −4.6875E−03 1.0712E−03 −8.0078E−04 −3.7298E−05 4.7146E−05 2.3196E−05 R10 −3.5973E+00 −2.6378E−02 8.2036E−03 −3.7951E−04 4.0294E−05 −1.2623E−05 −2.5586E−06 −2.9441E−07 R11 0.0000E+00 1.5123E−03 1.5066E−03 1.3873E−05 −7.0564E−06 −1.2349E−07 2.2066E−08 8.7553E−10 R12 −2.5742E+01 −1.8468E−02 2.0437E−03 −2.8494E−04 1.2543E−05 2.1677E−07 −5.5634E−09 1.2351E−11 Embodiment 2
S1 ∞ d0= −0.250 R1 2.05855 d1= 0.667 nd1 1.5831 v 1 59.39 R2 −162.13476 d2= 0.053 R3 8.31674 d3= 0.246 nd2 1.6448 v 2 22.44 R4 3.13480 d4= 0.526 R5 −5.20424 d5= 0.238 nd3 1.6397 v 3 23.53 R6 −7.00949 d6= 0.048 R7 25.15081 d7= 0.443 nd4 1.5441 v 4 56.12 R8 −31.86314 d8= 0.469 R9 −5.10336 d9= 0.400 nd5 1.5352 v 5 56.12 R10 −1.54692 d10= 0.745 R11 −3.51704 d11= 0.334 nd6 1.5352 v 6 56.12 R12 2.99421 d12= 0.525 R13 ∞ d13= 0.210 nd7 1.5168 v 6 64.17 R14 ∞ d14= 0.367 Cone Constant Aspherical Coefficient k A4 A6 A8 A10 A12 A14 A16 R1 −3.9914E−01 5.1347E−03 3.9935E−03 −4.3998E−03 7.0123E−04 −9.0193E−04 3.1784E−04 −7.5250E−04 R2 0.0000E+00 −3.4547E−03 −1.5884E−03 7.8018E−03 2.5746E−03 −3.1407E−03 −7.1772E−03 2.9993E−03 R3 7.2080E+00 −5.3285E−03 9.2349E−03 8.4584E−03 4.0817E−03 −1.1852E−03 −6.5897E−03 3.2996E−03 R4 −1.0918E+00 1.3975E−02 1.7355E−03 5.8184E−03 6.3352E−04 −4.7554E−04 8.5234E−04 2.0577E−03 R5 1.5408E+01 −6.2889E−03 −2.7558E−02 5.0151E−03 1.2420E−02 4.4756E−03 −2.2259E−03 1.3892E−03 R6 2.0552E+01 −1.2089E−02 −1.4051E−02 6.9773E−03 7.3500E−03 2.5705E−03 −8.6067E−05 −5.6191E−04 R7 0.0000E+00 −5.3613E−02 9.0270E−03 4.2467E−03 6.8994E−04 −4.1299E−04 −3.0380E−04 6.8197E−05 R8 0.0000E+00 −4.7013E−02 4.6574E−04 7.8162E−04 −1.0260E−05 7.6555E−05 5.2526E−05 −9.8378E−06 R9 5.6964E+00 −2.0286E−02 −4.8657E−03 9.9562E−04 −8.2468E−04 −4.4750E−05 4.4676E−05 2.2299E−05 R10 −3.4719E+00 −2.6178E−02 8.3300E−03 −3.3935E−04 5.1703E−05 −9.4344E−06 −1.6710E−06 −5.0991E−08 R11 0.0000E+00 1.5489E−03 1.5094E−03 1.4222E−05 −7.0229E−06 −1.1995E−07 2.2591E−08 9.9851E−10 R12 −2.2946E+01 −1.8454E−02 2.0477E−03 −2.8499E−04 1.2485E−05 2.0698E−07 −6.8141E−09 −1.3310E−10 Embodiment 3
S1 ∞ d0= −0.340 R1 1.85014 d1= 0.693 nd1 1.5831 v 1 59.39 R2 12.98282 d2= 0.054 R3 8.21719 d3= 0.240 nd2 1.6448 v 2 22.44 R4 3.08138 d4= 0.488 R5 −5.14525 d5= 0.240 nd3 1.6397 v 3 23.53 R6 −7.31498 d6= 0.048 R7 11.73945 d7= 0.513 nd4 1.5441 v 4 56.12 R8 −11.59443 d8= 0.530 R9 −4.60912 d9= 0.417 nd5 1.5352 v 5 56.12 R10 −1.59258 d10= 0.641 R11 −3.44315 d11= 0.330 nd6 1.5352 v 6 56.12 R12 2.90999 d12= 0.525 R13 ∞ d13= 0.210 nd7 1.5168 v 6 64.17 R14 ∞ d14= 0.315 Cone Constant Aspherical Coefficient k A4 A6 A8 A10 A12 A14 A16 R1 −2.7852E−01 7.3839E−03 5.5077E−03 −2.8976E−03 1.7625E−03 −2.5232E−04 6.6166E−04 −6.0391E−04 R2 0.0000E+00 −7.7522E−03 −1.7226E−03 8.1227E−03 3.0129E−03 −2.6824E−03 −6.8245E−03 3.2187E−03 R3 −1.3156E+01 −9.2638E−03 5.3509E−03 6.8432E−03 3.4362E−03 −1.4272E−03 −6.6749E−03 3.2726E−03 R4 −7.0467E−01 1.5119E−02 9.2835E−03 9.2141E−03 2.0401E−03 6.7868E−05 1.0864E−03 2.2099E−03 R5 1.4708E+01 −2.9712E−03 −2.5768E−02 5.8409E−03 1.2638E−02 4.6549E−03 −1.9855E−03 1.4996E−03 R6 2.3219E+01 −1.3800E−02 −1.5386E−02 6.4132E−03 7.1404E−03 2.4223E−03 −2.3378E−04 −6.7842E−04 R7 0.0000E+00 −5.2888E−02 9.1069E−03 4.0982E−03 5.7745E−04 −4.3429E−04 −3.0353E−04 7.0333E−05 R8 0.0000E+00 −4.4853E−02 2.4082E−05 4.3692E−04 −8.9891E−05 7.9119E−05 7.7391E−05 1.2703E−05 R9 5.4730E+00 −2.1679E−02 −4.7642E−03 1.1528E−03 −7.5970E−04 −2.7027E−05 4.8647E−05 2.2901E−05 R10 −3.7237E+00 −2.6449E−02 8.1111E−03 −4.1930E−04 3.1869E−05 −1.4001E−05 −2.7097E−06 −2.8304E−07 R11 0.0000E+00 1.4508E−03 1.5112E−03 1.5098E−05 −6.9538E−06 −1.1876E−07 2.1807E−08 7.9746E−10 R12 −2.3465E+01 −1.8288E−02 2.0952E−03 −2.8188E−04 1.2541E−05 2.0988E−07 −6.2247E−09 −1.8842E−11 f1/f 0.803 0.785 0.822 1 f3/f −7.485 −7.492 −6.439 2 (R3 + R4)/(R3 − R4) 2.250 2.210 2.200 3 (R5 + R6)/(R5 − R6) −6.969 −6.766 −5.743 4 f2/f −1.850 −1.789 −1.770 5 (R1 + R2)/(R1 − R2) −1.511 −0.975 −1.332 6 Fno 2.05 2.05 2.05 2ω 78.1 79.2 79.7 TTL/IH 1.409 1.408 1.401 f 4.554 4.445 4.401 f1 3.658 3.491 3.617 f2 −8.425 −7.951 −7.789 f3 −34.088 −33.300 −28.338 f4 18.590 25.904 10.805 f5 4.104 3.991 4.338 f6 −2.690 −2.969 −2.894 TTL 5.275 5.271 5.244 LB 1.087 1.102 1.050 IH 3.744 3.744 3.744
0.74
−10.00
2.00≦(
−4.00<(
−2.00
−1.55≦(
