A high-pixel wide-angle optical system and camera module using the same

Abstract

The application provides a high-pixel wide-angle optical system and an applied camera module, and the optical system is mainly composed of seven lenses. The object surface side of the first lens is a convex surface, the image surface side is a concave surface, and the optical power is negative; the object surface side of the second lens is a concave surface, the image surface side is a convex surface, and the optical power is negative; the object surface side of the third lens is a concave surface, the image surface side is a convex surface, and the optical power is positive; the object surface side and the image surface side of the fourth lens are both convex surfaces, and the optical power is positive; the object surface side and the image surface side of the fifth lens are both convex surfaces, and the optical power is positive; the object surface side and the image surface side of the sixth lens are both concave surfaces, and the optical power is negative; the object surface side of the seventh lens is a convex surface, the image surface side is a concave surface, and the optical power is positive. The number of lenses is reasonable, the optical power of the lenses is reasonably distributed, the lens aberration is optimized, the resolution performance is improved, the lens has high pixels, a large target surface of 1 / 1.8 inches, a large aperture and excellent resolution, and the lens has greater competitiveness in the market.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical imaging, in particular to a high-pixel wide-angle optical system and a camera module using the same. BACKGROUND

[0002] With the progress of science and technology and the development of social economy, camera lenses are widely used in car recorders. However, the camera lenses or optical systems used in car recorders have defects such as small aperture and poor imaging quality, which are difficult to meet the needs of users. SUMMARY

[0003] In order to overcome the problems of small aperture and poor imaging quality of the camera lenses or optical systems used in car recorders, the present application provides a high-pixel wide-angle optical system, which mainly consists of seven lenses. The number of lenses is reasonable, the lens power is reasonably distributed, the lens aberration is optimized, the resolving performance is improved, and the lens has high pixels, a large target surface of 1 / 1.8 inch, a large aperture, and excellent resolving power, so that the lens has greater competitiveness in the field of car recorders.

[0004] A high-pixel wide-angle optical system, which is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens along the optical axis from the object plane to the image plane.

[0005] The object side of the first lens is convex, the image side is concave, and the optical power is negative.

[0006] The object side of the second lens is concave, the image side is convex, and the optical power is negative.

[0007] The object side of the third lens is concave, the image side is convex, and the optical power is positive.

[0008] The object side and the image side of the fourth lens are both convex, and the optical power is positive.

[0009] The object side and the image side of the fifth lens are both convex, and the optical power is positive.

[0010] The object side and the image side of the sixth lens are both concave, and the optical power is negative.

[0011] The object side of the seventh lens is convex, the image side is concave, and the optical power is positive.

[0012] Preferably, each lens of the optical system satisfies the following conditions:

[0013] -2.50 < f1 / f < -2.10;

[0014] -11.00 < f2 / f < -3.50;

[0015] 3.00<f3 / f<8.50;

[0016] 2.10<f4 / f<2.50;

[0017] 2.30<f5 / f<6.00;

[0018] -2.50<f6 / f<-1.50;

[0019] 2.50<f7 / f<4.80;

[0020] Among them, f is the focal length of the entire optical system, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and f7 is the focal length of the seventh lens.

[0021] Preferably, the curvature radius R1 of the object side of the first lens and the curvature radius R2 of the image side of the first lens satisfy: 5.0<(R1+R2) / R2<10.5.

[0022] Preferably, the optical system satisfies the following conditions: 0.01<f / TTL*ImagH<0.04;

[0023] Wherein, f is the effective focal length of the optical system, TTL is the on-axis distance from the object side of the first lens to the imaging surface, and ImgH is half the diagonal length of the effective pixel area on the imaging surface.

[0024] On the other hand, an embodiment of the present application further provides a camera module, which includes at least an optical lens, in which the above-mentioned high-pixel wide-angle optical system is installed.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] The present invention provides a high-pixel wide-angle optical system and a camera lens used therein. The system is mainly composed of seven lenses, with a reasonable number of lenses. By rationally allocating the optical power of the lenses, lens aberrations are optimized, and resolution performance is improved. The system has high pixels, a large target area of ​​1 / 1.8 inches, a large aperture, and excellent resolution, making the lens more competitive in the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments.

[0028] Figure 1 Schematic diagram of the structure of the optical system or camera module of Example 1 of the present application;

[0029] Figure 22 is a schematic structural diagram of an optical system or camera module according to embodiment 2 of the present application;

[0030] Figure 3 It is a structural diagram of the optical system or camera module of Example 3 of the present application. DETAILED DESCRIPTION

[0031] The present application provides a high-pixel wide-angle optical system, which is composed of a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7 in order from the object plane to the image plane along the optical axis;

[0032] The object side of the first lens E1 is convex, the image side is concave, and its optical power is negative;

[0033] The object side of the second lens E2 is concave, the image side is convex, and its optical power is negative;

[0034] The object side of the third lens E3 is concave, the image side is convex, and its optical power is positive;

[0035] The fourth lens element E4 has convex surfaces on both the object side and the image side, and has positive refractive power;

[0036] The object side and image side of the fifth lens E5 are both convex, and its optical power is positive;

[0037] The object side and image side of the sixth lens E6 are both concave, and its optical power is negative;

[0038] The seventh lens E7 has a convex object side and a concave image side, and has positive refractive power.

[0039] The optical system of the embodiment of the present application is mainly composed of 7 lenses. The number of lenses is reasonable. By reasonably allocating the optical focal length of the lenses, optimizing lens aberrations and improving the resolution performance, it has high pixels, a large target area of ​​1 / 1.8 inches, a large aperture and excellent resolution, making the lens more competitive in the market.

[0040] Furthermore, as a preferred embodiment of the present invention but not limiting, each lens of the optical system satisfies the following conditions:

[0041] -2.50<f1 / f<-2.10, by constraining the effective focal length ratio of the first lens E1 and the optical system to a reasonable range, the distortion of the system is controlled, and the imaging center has a higher angular resolution;

[0042] -11.00<f2 / f<-3.50; by constraining the effective focal length ratio of the second lens E2 to the optical system within a reasonable range, lens aberrations are optimized and imaging quality is improved;

[0043] 3.00<f3 / f<8.50; by constraining the effective focal length ratio of the third lens E3 to the optical system within a reasonable range, the spherical aberration of the system is fine-tuned and controlled, thereby effectively improving the imaging quality of the system;

[0044] 2.10<f4 / f<2.50; By rationally controlling the ratio of the fourth lens element E4 to the effective focal length of the optical system, the imaging quality of the system is effectively improved;

[0045] 2.30<f5 / f<6.00; by constraining the ratio of the fifth lens's E5 focal power to the effective focal length of the optical system to a reasonable range, image quality is improved;

[0046] -2.50<f6 / f<-1.50; by constraining the effective focal length ratio of the sixth lens E6 to the optical system within a reasonable range, lens aberrations are optimized and analytical performance is improved;

[0047] 2.50<f7 / f<4.80; by constraining the ratio of the seventh lens's E7 focal length to the effective focal length of the optical system to a reasonable range, the imaging quality is improved;

[0048] Wherein, f is the focal length of the entire optical system, f1 is the focal length of the first lens E1, f2 is the focal length of the second lens E2, f3 is the focal length of the third lens E3, f4 is the focal length of the fourth lens E4, f5 is the focal length of the fifth lens E5, f6 is the focal length of the sixth lens E6, and f7 is the focal length of the seventh lens E7.

[0049] Furthermore, the refractive index Nd1 and Abbe number Vd1 of the first lens element E1 satisfy the following conditions: 1.40<Nd1<1.80, 60.00<Vd1<75.00. This design can effectively reduce chromatic aberration, optimize lens aberrations, and thereby effectively improve the imaging quality of the system.

[0050] Furthermore, the refractive index Nd2 and Abbe number Vd2 of the second lens element E2 satisfy the following requirements: 1.51<Nd2<2.01, 20.20<Vd2<29.00. This design can effectively reduce chromatic aberration, optimize lens aberrations, and thus effectively improve the imaging quality of the system.

[0051] Furthermore, the refractive index Nd3 and Abbe number Vd3 of the third lens element E3 satisfy the following conditions: 1.45<Nd3<1.70, 50.00<Vd3<60.00. This design can effectively reduce chromatic aberration, optimize lens aberrations, and thus effectively improve the imaging quality of the system.

[0052] Furthermore, the refractive index Nd4 and Abbe number Vd4 of the fourth lens element E4 satisfy the following conditions: 1.40<Nd4<1.70, 70.00<Vd4<85.00. This design can effectively reduce chromatic aberration, optimize lens aberrations, and thus effectively improve the imaging quality of the system.

[0053] Furthermore, the refractive index Nd5 and Abbe number Vd5 of the fifth lens element E5 satisfy the following conditions: 1.40<Nd5<1.63, 50.00<Vd5<60.00. This design can effectively reduce chromatic aberration, optimize lens aberrations, and thus effectively improve the imaging quality of the system.

[0054] Furthermore, the refractive index Nd6 and Abbe number Vd6 of the sixth lens element E6 satisfy the following conditions: 1.50<Nd6<1.75, 20.20<Vd6<29.00. This design can effectively reduce chromatic aberration, optimize lens aberrations, and thus effectively improve the imaging quality of the system.

[0055] Furthermore, the refractive index Nd7 and Abbe number Vd7 of the seventh lens element E7 satisfy the following conditions: 1.45<Nd7<1.70, 50.00<Vd7<60.00. This design can effectively reduce chromatic aberration, optimize lens aberrations, and thus effectively improve the imaging quality of the system.

[0056] Furthermore, as a preferred embodiment of the present invention but not a limitation thereof, the first lens element E1, the second lens element E2, and the fourth lens element E4 are spherical lenses, and the third lens element E3, the fifth lens element E5, the sixth lens element E6, and the seventh lens element E7 are aspherical lenses. By rationally distributing lens surface shapes, lens aberrations are optimized, and resolution performance is improved, resulting in high pixels, a large target area of ​​1 / 1.8 inches, a large aperture, and excellent resolution.

[0057] Furthermore, as a preferred embodiment of the present invention but not a limitation thereof, the curvature radius R1 on the object side and the curvature radius R2 on the image side of the first lens E1 satisfy the following relationship: 5.0<(R1+R2) / R2<10.5. By controlling the curvature radii on the object side and the image side of the first lens E1, the total deflection angles of the object side and the image side of the first lens E1 at the edge of the field of view can be reasonably controlled to be within a reasonable range, thereby effectively reducing the sensitivity of the system.

[0058] Furthermore, as a preferred embodiment of the present invention but not a limitation, the full field of view FOV of the optical system satisfies: 140°≤FOV≤145°. This design satisfies the large field of view of the lens and is conducive to the application of the lens in the market.

[0059] Furthermore, as a preferred embodiment of the present invention but not a limitation, the total optical length TTL of the optical system satisfies: TTL≤25.0 mm. This design has the advantages of compact structure and easy processing and installation.

[0060] Furthermore, as a preferred embodiment of the present invention but not a limitation thereof, the refractive index Nd5 and Abbe number Vd5 of the fifth lens element E5, as well as the refractive index Nd6 and Abbe number Vd6 of the sixth lens element E6, satisfy the following conditions: 0.80 < Nd5 / Nd6 < 1.10, and 2.4 < Vd5 / Vd6 < 3.2. This design increases the difference between the refractive index and Abbe number of the lenses, effectively reducing chromatic aberration.

[0061] Specifically, as a preferred embodiment of the present invention but not limiting, Figure 1 FIG. 1 shows a schematic structural diagram of an optical imaging lens according to Example 1 of the present application. Figure 1 As shown, the first lens E1 has negative focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive focal power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has positive focal power, with its object-side surface S8 being convex and its image-side surface S9 being convex. The fifth lens E5 has positive focal power, with its object-side surface S10 being convex and its image-side surface S11 being convex. The sixth lens E6 has negative focal power, with its object-side surface S12 being concave and its image-side surface S13 being concave. The seventh lens E7 has positive focal power, with its object-side surface S14 being convex and its image-side surface S15 being concave. The filter E8 has an object-side surface S16 and an image-side surface S17. Light from an object passes through the surfaces S1 to S17 in sequence and is finally imaged on the imaging surface S18 .

[0062] Table 1 shows the surface type, curvature radius, thickness, and material of each lens of the optical imaging lens of Example 1, where the units of curvature radius and thickness are both millimeters (mm):

[0063] Table 1: Basic parameters of the optical system of Example 1

[0064] Face number Surface type Curvature radius (mm) Thickness (mm) Material OBJ spherical surface endless endless S1 spherical surface 14.323 0.800 1.49,70.44 S2 spherical surface 3.366 2.830 S3 spherical surface -8.774 4.500 2.00,28.31 S4 spherical surface -14.071 0.100 S5 Aspheric -32.920 4.000 1.54,55.71 S6 Aspheric -11.778 0.125 STO spherical surface endless 0.050 S8 spherical surface 8.265 2.100 1.50,81.61 S9 spherical surface -8.265 1.060 S10 Aspheric 9.917 1.740 1.54,55.71 S11 Aspheric -9.573 0.100 S12 Aspheric -8.893 0.600 1.66,20.37 S13 Aspheric 8.489 1.375 S14 Aspheric 4.783 1.600 1.54,55.71 S15 Aspheric 8.595 2.300 S16 spherical surface endless 0.800 1.52,58.57 S17 spherical surface endless 0.390 S18 spherical surface endless

[0065] In Table 1 above, any one of the object side and image side of the third lens E3, the fifth lens E5, and the sixth lens E6 to the seventh lens E7 is an aspherical surface. The surface shape of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0066]

[0067] Where x is the distance from the corresponding point on the aspheric surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspheric surface to the optical axis, c is the curvature of the aspheric vertex, k is the conic coefficient, and Ai is the coefficient corresponding to the i-th higher-order term in the aspheric surface shape formula. Table 2 shows the conic coefficients and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 for various aspheric surfaces that can be used in Example 1.

[0068] Table 2: Aspheric surface related values ​​of the lens surface of Example 1

[0069] Face number K A4 A6 A8 5 -5.950E-01 -1.240E-03 6.143E-05 -2.576E-05 6 1.002E-02 4.837E-04 -3.237E-05 1.470E-05 10 5.554E-03 1.580E-03 -1.118E-04 7.890E-06 11 4.803E-03 1.345E-02 -4.049E-03 8.036E-04 12 -2.883E-03 9.201E-03 -2.314E-03 5.091E-04 13 -6.486E-04 -3.785E-03 1.866E-03 -2.691E-04 14 -8.939E+00 1.205E-03 -6.501E-04 1.161E-04 15 -9.432E-01 -4.546E-03 6.741E-05 3.938E-06 Face number A10 A12 A14 A16 5 4.681E-06 -4.247E-07 1.544E-08 0.000E+00 6 -2.654E-06 2.552E-07 -9.548E-09 0.000E+00 10 -2.882E-07 -5.214E-08 2.204E-09 0.000E+00 11 -9.641E-05 6.068E-06 -1.512E-07 0.000E+00 12 -6.729E-05 4.530E-06 -1.162E-07 0.000E+00 13 2.650E-05 -1.574E-06 4.342E-08 0.000E+00 14 -1.382E-05 1.033E-06 -4.362E-08 7.483E-10 15 -6.133E-07 7.552E-09 1.250E-09 -6.808E-11

[0070] Specifically, as a preferred embodiment of the present invention but not limiting, Figure 2 FIG. 1 shows a schematic structural diagram of an optical imaging lens according to Example 2 of the present application. Figure 2 As shown, the first lens E1 has negative focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive focal power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has positive focal power, with its object-side surface S8 being convex and its image-side surface S9 being convex. The fifth lens E5 and the sixth lens E6 are a cemented lens. The fifth lens E5 has positive focal power, with its object-side surface S10 being convex and its image-side surface S11 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The seventh lens E7 has positive focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0071] Table 3 shows the surface type, curvature radius, thickness, and material of each lens of the optical imaging lens system of Example 2, where the units of curvature radius and thickness are both in millimeters (mm):

[0072] Table 3: Basic parameters of the optical system of Example 2

[0073] Face number Surface type Curvature radius (mm) Thickness (mm) Material OBJ spherical surface endless endless S1 spherical surface 32.022 1.499 1.49,70.44 S2 spherical surface 3.448 2.509 S3 spherical surface -8.237 3.587 2.00,28.31 S4 spherical surface -17.805 0.200 S5 Aspheric -71.483 3.604 1.54,55.71 S6 Aspheric -6.754 1.461 STO spherical surface endless 0.097 S8 spherical surface 9.525 1.696 1.50,81.61 S9 spherical surface -7.765 1.731 S10 Aspheric 30.966 1.572 1.54,55.71 S11 Aspheric -18.319 0.550 1.66,20.37 S12 Aspheric 7.654 0.547 S13 Aspheric 3.746 1.056 1.54,55.71 S14 Aspheric 8.212 2.300 S15 spherical surface endless 0.800 1.52,58.57 S16 spherical surface endless 1.293 S17 spherical surface endless

[0074] In Table 3 above, any one of the object side and image side of the third lens E3, the fifth lens E5, and the sixth lens E6 to the seventh lens E7 is an aspherical surface. The surface shape of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0075]

[0076] Where x is the distance from the corresponding point on the aspheric surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspheric surface to the optical axis, c is the curvature of the aspheric vertex, k is the conic coefficient, and Ai is the coefficient corresponding to the i-th higher-order term in the aspheric surface shape formula. Table 4 shows the conic coefficients and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 for various aspheric surfaces that can be used in Example 2.

[0077] Table 4: Aspheric surface related values ​​of the lens surface of Example 2

[0078] Face number K A4 A6 A8 5 -2.753E+01 -1.424E-03 6.508E-05 -1.742E-05 6 2.117E-01 1.052E-03 -5.543E-05 1.927E-05 10 1.505E+01 2.492E-03 8.512E-05 -2.191E-05 11 3.468E-01 -1.374E-04 -1.627E-03 5.072E-04 12 -7.832E-02 -6.100E-03 1.826E-03 -2.402E-04 13 -7.093E+00 8.162E-05 -5.082E-04 1.201E-04 14 1.739E+00 -5.923E-03 1.330E-04 1.064E-05 Face number A10 A12 A14 A16 5 3.085E-06 -2.390E-07 7.290E-09 0.000E+00 6 -2.157E-06 1.327E-07 -2.797E-09 0.000E+00 10 5.933E-07 4.864E-08 -3.433E-09 0.000E+00 11 -6.430E-05 3.922E-06 -9.660E-08 0.000E+00 12 2.566E-05 -1.781E-06 5.038E-08 0.000E+00 13 -1.298E-05 1.049E-06 -5.161E-08 1.134E-09 14 -1.581E-07 4.470E-09 8.724E-10 8.321E-11

[0079] Specifically, as a preferred embodiment of the present invention but not limiting, Figure 3 FIG. 4 shows a schematic structural diagram of an optical imaging lens according to Example 3 of the present application. Figure 3 As shown, the first lens E1 has negative focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative focal power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive focal power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has positive focal power, with its object-side surface S8 being convex and its image-side surface S9 being convex. The fifth lens E5 has positive focal power, with its object-side surface S10 being convex and its image-side surface S11 being convex. The sixth lens E6 has negative focal power, with its object-side surface S12 being concave and its image-side surface S13 being concave. The seventh lens E7 has positive focal power, with its object-side surface S14 being convex and its image-side surface S15 being concave. The filter E8 has an object-side surface S16 and an image-side surface S17. Light from an object passes through the surfaces S1 to S17 in sequence and is finally imaged on the imaging surface S18 .

[0080] Table 5 shows the surface type, curvature radius, thickness, and material of each lens of the optical imaging lens system of Example 3, where the units of curvature radius and thickness are both in millimeters (mm):

[0081] Table 5: Basic parameters of the optical system of Example 3

[0082] Face number Surface type Curvature radius (mm) Thickness (mm) Material OBJ spherical surface endless endless S1 spherical surface 31.002 1.476 1.49,70.44 S2 spherical surface 3.644 2.550 S3 spherical surface -8.315 3.103 2.00,28.31 S4 spherical surface -22.096 0.202 S5 Aspheric -92.513 4.228 1.54,55.71 S6 Aspheric -6.421 1.928 STO spherical surface endless 0.086 S8 spherical surface 7.832 1.794 1.50,81.61 S9 spherical surface -8.164 1.264 S10 Aspheric 38.659 1.143 1.54,55.71 S11 Aspheric -17.091 0.498 S12 Aspheric -8.717 0.610 1.66,20.37 S13 Aspheric 8.185 0.259 S14 Aspheric 3.400 1.138 1.54,55.71 S15 Aspheric 8.633 2.300 S16 spherical surface endless 0.800 1.52,58.57 S17 spherical surface endless 1.141 S18 spherical surface endless

[0083] In Table 5 above, any one of the object side and image side of the third lens E3, the fifth lens E5, and the sixth lens E6 to the seventh lens E7 is aspherical. The surface shape of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0084]

[0085] wherein x is the distance from the corresponding point on the aspherical surface to the plane tangent to the surface vertex, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the aspherical surface vertex, k is the conic coefficient, and Ai is the coefficient corresponding to the i-th high order term in the aspherical surface formula. Table 6 shows the conic coefficients and high order term coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical surfaces used in Example 3.

[0086] Table 6: Aspherical surface related values of the lens in Example 3

[0087] Face number K A4 A6 A8 5 4.376E+01 -1.402E-03 6.453E-05 -1.601E-05 6 9.608E-02 1.176E-03 -3.658E-05 1.781E-05 10 -1.950E+01 2.921E-03 6.773E-05 -2.702E-05 11 -2.144E-01 4.732E-06 1.572E-06 1.382E-07 12 -8.547E+00 1.742E-04 -1.729E-03 4.939E-04 13 -5.796E+00 -7.657E-03 1.922E-03 -2.188E-04 14 -8.033E+00 3.482E-04 -4.570E-04 1.181E-04 15 3.225E+00 -5.099E-03 1.747E-04 6.120E-06 Face number A10 A12 A14 A16 5 3.027E-06 -2.309E-07 6.965E-09 0.000E+00 6 -2.288E-06 1.696E-07 -4.061E-09 0.000E+00 10 7.727E-07 7.655E-08 -1.082E-08 0.000E+00 11 5.651E-09 -2.210E-10 -6.382E-11 0.000E+00 12 -6.293E-05 4.176E-06 -1.110E-07 0.000E+00 13 2.557E-05 -1.950E-06 6.252E-08 0.000E+00 14 -1.301E-05 1.056E-06 -5.168E-08 1.078E-09 15 -3.054E-07 1.109E-08 1.381E-09 -4.575E-11

[0088] In Examples 1-3, the basic data are shown in Table 7 below.

[0089] Table 7: Basic data of Examples 1-3

[0090]

[0091]

[0092] In Examples 1-3, the conditional expressions are shown in Table 8 below.

[0093] Table 8: Conditional expressions of Examples 1-3

[0094] Conditional expression Example 1 Example 2 Example 3 (R1+R2) / R2 5.26 10.28 9.51 f1 / f -2.43 -2.14 -2.27 f2 / f -10.60 -4.98 -3.93 f3 / f 8.43 3.63 3.33 f4 / f 2.28 2.36 2.20 f5 / f 2.47 5.77 5.87 f6 / f -1.69 -2.14 -1.65 f7 / f 4.61 3.15 2.56 f / TTL*ImgH 0.03 0.03 0.03 Nd5 / Nd6 0.93 0.93 0.93 Vd5 / Vd6 2.73 2.73 2.73

[0095] A camera module at least includes an optical lens, the optical lens is installed with a high-pixel wide-angle optical system, the optical system is mainly composed of 7 lenses, the number of lenses is reasonable, the lens aberration is optimized by reasonably distributing the lens power, the resolving performance is improved, the lens has high pixels, a large target surface of 1 / 1.8 inches, a large aperture and excellent resolving power, so that the lens has greater competitiveness in the market.

[0096] The above is one or more embodiments provided in combination with specific content, and does not mean that the specific implementation of the present application is limited to these descriptions. Any approximation, similarity or replacement of the method and structure of the present application, or technical deduction or replacement under the premise of the concept of the present application, should be considered as the protection scope of the present application.

Claims

1. A high-pixel wide-angle optical system, comprising, in order from the object plane to the image plane along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, characterized in that: The object side of the first lens is convex, the image side is concave, and its optical power is negative; The object side of the second lens is concave, the image side is convex, and its optical power is negative; The object side of the third lens is concave, the image side is convex, and its optical power is positive; The fourth lens has convex surfaces on both the object side and the image side, and its optical power is positive; The object side and image side of the fifth lens are both convex, and its optical power is positive; The object side and image side of the sixth lens are both concave, and its optical power is negative; The seventh lens has a convex object side and a concave image side, and its optical power is positive. The aperture of the optical system is located between the third lens and the fourth lens; Each lens of the optical system meets the following conditions: -2.50<f1 / f<-2.10; -11.00<f2 / f<-3.50; 3.00<f3 / f<8.50; 2.10<f4 / f<2.50; 2.30<f5 / f<6.00; -2.50<f6 / f<-1.50; 2.50<f7 / f<4.80; Among them, f is the focal length of the entire optical system, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and f7 is the focal length of the seventh lens.

2. The high-pixel wide-angle optical system according to claim 1, wherein: The curvature radius R1 of the object side of the first lens and the curvature radius R2 of the image side of the first lens satisfy: 5.0<(R1+R2) / R2<10.

5.

3. The high-pixel wide-angle optical system according to claim 1, wherein: The optical system meets the following conditions: 0.01mm<f / TTL*ImgH<0.04mm; Wherein, f is the effective focal length of the optical system, TTL is the on-axis distance from the object side of the first lens to the imaging surface, and ImgH is half the diagonal length of the effective pixel area on the imaging surface.

4. The high-pixel wide-angle optical system according to any one of claims 1 to 3, wherein: The material refractive index Nd1 and the material Abbe number Vd1 of the first lens satisfy the following conditions: 1.40<Nd1<1.80, 60.00<Vd1<75.00; and / or The material refractive index Nd2 and the material Abbe number Vd2 of the second lens satisfy the following conditions: 1.51<Nd2<2.01, 20.20<Vd2<29.00; and / or The refractive index Nd3 and the Abbe number Vd3 of the material of the third lens satisfy the following conditions: 1.45<Nd3<1.70, 50.00<Vd3<60.00; and / or The refractive index Nd4 and the Abbe number Vd4 of the material of the fourth lens satisfy the following conditions: 1.40<Nd4<1.70, 70.00<Vd4<85.00; and / or The refractive index Nd5 and the Abbe number Vd5 of the material of the fifth lens satisfy the following conditions: 1.40<Nd5<1.63, 50.00<Vd5<60.00; and / or The refractive index Nd6 and the Abbe number Vd6 of the material of the sixth lens satisfy the following conditions: 1.50<Nd6<1.75, 20.20<Vd6<29.00; and / or The material refractive index Nd7 and the material Abbe number Vd7 of the seventh lens satisfy: 1.45<Nd7<1.70, 50.00<Vd7<60.

00.

5. The high-pixel wide-angle optical system according to any one of claims 1 to 3, characterized in that: The optical system satisfies the following conditions: the refractive index Nd5 and the Abbe number Vd5 of the fifth lens, and the refractive index Nd6 and the Abbe number Vd6 of the sixth lens satisfy: 0.80<Nd5 / Nd6<1.10, 2.4<Vd5 / Vd6<3.

2.

6. The high-pixel wide-angle optical system according to any one of claims 1 to 3, characterized in that: The optical system satisfies the following conditions: the first lens, the second lens, and the fourth lens are spherical lenses, and the third lens, the fifth lens, the sixth lens, and the seventh lens are aspherical lenses.

7. The high-pixel wide-angle optical system according to any one of claims 1 to 3, characterized in that: The total optical length TTL of the optical system satisfies: TTL≤25.0 mm.

8. The high-pixel wide-angle optical system according to any one of claims 1 to 3, characterized in that: The full field of view FOV of the optical system satisfies: 140°≤FOV≤145°.

9. A camera module, comprising at least an optical lens, characterized in that: The optical lens is equipped with the high-pixel wide-angle optical system according to any one of claims 1 to 8.

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