A panoramic fisheye optical system and a camera module using the same

Abstract

The present invention provides a panoramic fisheye optical system and a camera module applied thereto, which is mainly composed of 10 lenses and 1 reflective element. By rationally matching the lens shapes, the optical system can effectively reduce the volume of the system while meeting the ultra-wide-angle requirements, achieving the performance requirements of large and high pixels. In addition, the use of the reflective element further reduces the height of the system, making the product compact and enhancing the user experience.

Description

Technical Field

[0001] The present application relates to the field of optical imaging, and in particular to a panoramic fisheye optical system and a camera module used therein. Background Art

[0002] With the widespread application of panoramic VR / AR in multiple scenarios, the quality requirements for lenses are becoming increasingly higher. While meeting the requirements of ultra-wide angle, high pixel and small size, the lenses are also expected to have better imaging performance and impact resistance. Summary of the Invention

[0003] To address the issues of large size, impact resistance, and poor imaging quality in existing panoramic VR / AR lenses, this application provides a high-pixel panoramic optical system, which adopts the following technical solutions:

[0004] A panoramic fisheye optical system, which is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a reflective element, a seventh lens, an eighth lens, a ninth lens, a tenth lens, and an eleventh lens in order from the object plane to the image plane along the optical axis;

[0005] The first lens has negative optical power, its object side surface is convex, and its image side surface is concave;

[0006] The second lens has negative optical power and its image side surface is concave;

[0007] The first lens and the second lens constitute a first cemented lens, the optical power of which is negative;

[0008] The third lens has negative optical power, its object side surface is convex, and its image side surface is concave;

[0009] The fourth lens has negative optical power, and its image-side surface is concave;

[0010] The fifth lens has a positive optical power and a convex image-side surface;

[0011] The reflective component is used to reflect the light beam passing through the fifth lens to the seventh lens;

[0012] The seventh lens has positive refractive power, and both the object-side surface and the image-side surface are convex;

[0013] The eighth lens has positive refractive power, its object-side surface is convex, and its image-side surface is concave;

[0014] The ninth lens has negative optical power, and its object side surface is convex;

[0015] The tenth lens has positive refractive power, and both the object-side surface and the image-side surface thereof are convex;

[0016] The ninth lens and the tenth lens constitute a second cemented lens, and the optical power thereof is negative;

[0017] The eleventh lens has positive refractive power, and its object-side surface is convex.

[0018] Preferably, the optical system satisfies the following relationship: Nd1<1.52, Vd1>64; wherein Nd1 is the refractive index of the first lens material, and Vd1 is the Abbe number of the first lens.

[0019] Preferably, the optical system satisfies the following relationship: 1.92<|f123 / f|<2.73; wherein f123 is the effective combined focal length of the first lens, the second lens and the third lens, and f is the effective focal length of the optical system.

[0020] Preferably, the optical system satisfies the following relationship: 0.8<|f8 / f910|<1.6; wherein f8 is the effective focal length of the eighth lens, and f910 is the effective focal length of the second cemented lens.

[0021] Preferably, the optical system satisfies the following relationship: -38.2<f910 / f<-16.1; and / or Vd9<23.8, Vd10>68; wherein f910 is the effective focal length of the second cemented lens, f is the effective focal length of the optical system, Vd9 is the Abbe number of the ninth lens, and Vd10 is the Abbe number of the tenth lens.

[0022] Preferably, the optical system satisfies the following relationship: Nd7<1.62, Vd7>63; wherein Nd7 is the refractive index of the seventh lens, and Vd7 is the Abbe number of the seventh lens.

[0023] Preferably, the optical system satisfies the following relationship: D1 / (Fno*Ymax)<4.10; wherein D1 is the maximum effective diameter of the first lens, Fno is the system aperture, and Ymax is the maximum image circle radius of the system.

[0024] Preferably, the optical system satisfies the following relationship: 5.0<TTL / (CT1+CT2+CT3+CT4+CT5)<8.1; wherein TTL is the on-axis distance from the object side of the first lens of the system to the imaging plane, CT1 is the thickness of the first lens on the optical axis, CT2 is the thickness of the second lens on the optical axis, CT3 is the thickness of the third lens on the optical axis, CT4 is the thickness of the fourth lens on the optical axis, and CT5 is the thickness of the fifth lens on the optical axis.

[0025] 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 panoramic fisheye optical system is installed.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] The present invention provides a panoramic fisheye optical system and a camera module applied thereto, which is mainly composed of 10 lenses and 1 reflective element. By rationally matching the lens shapes, the optical system can effectively reduce the volume of the system while meeting the ultra-wide-angle requirements, achieving the performance requirements of large and high pixels. In addition, the use of the reflective element further reduces the height of the system, making the product compact and enhancing the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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.

[0029] Figure 1 Schematic diagram of the structure of the optical system or camera module of Example 1 of the present application;

[0030] Figure 2 is the distortion curve of the optical system or camera module in Example 1 of the present application;

[0031] Figure 3 2 is a schematic structural diagram of an optical system or camera module according to embodiment 2 of the present application;

[0032] Figure 4 is the distortion curve of the optical system or camera module in Example 2 of the present application;

[0033] Figure 5 Schematic diagram of the structure of the optical system or camera module according to Example 3 of the present application;

[0034] Figure 6 It is the distortion curve of the optical system or camera module of Example 3 of the present application. DETAILED DESCRIPTION

[0035] The present invention provides a panoramic fisheye optical system, which is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a reflective element, a seventh lens, an eighth lens, a ninth lens, a tenth lens, and an eleventh lens in order from the object plane to the image plane along the optical axis.

[0036] The first lens has negative optical power, its object side surface is convex, and its image side surface is concave;

[0037] The second lens has negative optical power and its image side surface is concave;

[0038] The first lens and the second lens constitute a first cemented lens, the optical power of which is negative;

[0039] The third lens has negative optical power, its object side surface is convex, and its image side surface is concave;

[0040] The fourth lens has negative optical power, and its image-side surface is concave;

[0041] The fifth lens has a positive optical power and a convex image-side surface;

[0042] The reflective component is used to reflect the light beam passing through the fifth lens to the seventh lens;

[0043] The seventh lens has positive refractive power, and both the object-side surface and the image-side surface are convex;

[0044] The eighth lens has positive refractive power, its object-side surface is convex, and its image-side surface is concave;

[0045] The ninth lens has negative optical power, and its object side surface is convex;

[0046] The tenth lens has positive refractive power, and both the object-side surface and the image-side surface thereof are convex;

[0047] The ninth lens and the tenth lens constitute a second cemented lens, and the optical power thereof is negative;

[0048] The eleventh lens has positive refractive power, and its object-side surface is convex.

[0049] The panoramic fisheye optical system of the embodiment of the present application is mainly composed of 10 lenses and 1 reflective element. Through the reasonable combination of lens shapes, the optical system can effectively reduce the volume of the system while meeting the ultra-wide-angle requirements, achieving the performance requirements of large and high pixels. In addition, the use of reflective elements further reduces the height of the system, making the product compact and enhancing the user experience.

[0050] Furthermore, the optical system satisfies the following relationship: Nd1 < 1.52, Vd1 > 64; where Nd1 is the refractive index of the first lens material, and Vd1 is the Abbe number of the first lens. While ensuring high definition and a compact size for the optical system, the first lens is constructed from a material that is easily tempered and chemically stable, effectively enhancing the lens's impact resistance and extending its lifespan.

[0051] Furthermore, the optical system satisfies the following relationship: 1.92 < |f123 / f| < 2.73; where f123 is the effective combined focal length of the first, second, and third lenses, and f is the effective focal length of the optical system. In the embodiment of the present application, the first and second lenses are bonded together. By constraining the ratio of the combined focal length of the first, second, and third lenses to the effective focal length of the optical system, the focal powers of the first, second, and third lenses can be properly distributed. This allows the optical system to achieve a wide field of view, control the size of the optical system, adjust the angle of incidence of light, and balance the internal aberrations of the optical lens. This, in turn, helps adjust the field curvature and astigmatism at the imaging edge of the optical lens, thereby ensuring the optical lens's imaging quality for the surrounding environment.

[0052] Furthermore, the optical system satisfies the following relationship: 0.8 < |f8 / f910| < 1.6, where f8 is the effective focal length of the eighth lens element, and f910 is the effective focal length of the second cemented lens element. By limiting the effective focal length ratio of the combined eighth, ninth, and tenth lenses, the system's field curvature can be effectively corrected, thereby ensuring balanced image quality at the center and edges of the field of view.

[0053] Furthermore, the optical system satisfies the following relationships: -38.2 < f910 / f < -16.1; Vd9 < 23.8, Vd10 > 68; where f910 is the effective focal length of the second cemented lens, f is the effective focal length of the optical system, Vd9 is the Abbe number of the ninth lens, and Vd10 is the Abbe number of the tenth lens. By controlling the ratio of the combined lens of the ninth and tenth lenses of the optical system to the effective focal length of the optical system, the height of the light beam incident on the eleventh lens is controlled, thereby achieving better matching between the CRA of the optical system and the CRA of the sensor. Furthermore, by properly combining the materials of the cemented lens 2, chromatic aberration of the system can be effectively corrected.

[0054] Furthermore, the optical system satisfies the following relationship: Nd7 < 1.62, Vd7 > 63, where Nd7 is the refractive index of the seventh lens element, and Vd7 is the Abbe number of the seventh lens element. By controlling the refractive index and Abbe number of the seventh lens material of the optical system, the temperature characteristics of the optical system can be effectively balanced.

[0055] Furthermore, the optical system satisfies the following relationship: D1 / (Fno*Ymax)<4.10; where D1 is the maximum effective diameter of the first lens, Fno is the system aperture, and Ymax is the system's maximum image circle radius. By limiting the maximum image circle and aperture size of the optical imaging system, the optical effective diameter of the first lens is limited, thereby ensuring system miniaturization.

[0056] Furthermore, the optical system satisfies the following relationship: 5.0 < TTL / (CT1 + CT2 + CT3 + CT4 + CT5) < 8.1; where TTL is the on-axis distance from the object side of the first lens to the imaging plane of the system, CT1 is the thickness of the first lens on the optical axis, CT2 is the thickness of the second lens on the optical axis, CT3 is the thickness of the third lens on the optical axis, CT4 is the thickness of the fourth lens on the optical axis, and CT5 is the thickness of the fifth lens on the optical axis. By rationally configuring the ratio of the sum of the center thicknesses of the first through fifth lenses of the optical system to the total length of the optical system, the total length of the optical system can be shortened, making the optical system more compact and reducing the axial dimensions of the product to meet miniaturization requirements. This also helps reduce the decentering sensitivity of each lens, thereby facilitating the production and assembly of the optical system. If the upper limit of the above conditional expression is exceeded, the sum of the center thicknesses of each lens is too large, which is not conducive to achieving a compact structure and miniaturization. If the lower limit is exceeded, the center thicknesses of each lens are too large, resulting in increased sensitivity to decentering, which is not conducive to lens production and assembly.

[0057] Furthermore, the reflective element may be a reflective plane mirror or a right-angle reflective prism. In this embodiment, the reflective element is a right-angle reflective prism. The reflective element is used to redirect the light path, thereby reducing the volume of the optical system.

[0058] Furthermore, the aperture is located between the eighth and ninth lenses; the fourth, seventh, eighth, and eleventh lenses are aspherical lenses. The optical system has a full field of view of 200° or greater, and a total lens length of 33mm or less. The panoramic fisheye optical system configured in this invention offers excellent impact resistance, high pixel count, a large image area, an ultra-wide angle, and an athermal design. Its compact structure facilitates processing and installation, further extending product life and enhancing the user experience.

[0059] Specifically, as a preferred embodiment of the present invention but not limiting, the following reference is made to Figures 1 to 2 The optical imaging lens according to Example 1 of the present application is described. Figure 1 A schematic structural diagram of an optical imaging lens according to Example 1 of the present application is shown.

[0060] like Figure 1 As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a reflective element E6, a seventh lens E7, an eighth lens E8, STO, a ninth lens E9, a tenth lens E10, an eleventh lens E11, a filter E12, and an imaging surface S24.

[0061] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S6 being concave and its image-side surface S7 being concave. The fifth lens E5 has positive optical power, with its object-side surface S8 being convex and its image-side surface S9 being convex. The seventh lens E7 has positive optical power, with its object-side surface S12 being convex and its image-side surface S13 being convex. The eighth lens E8 has positive optical power, with its object-side surface S14 being convex and its image-side surface S15 being concave. The ninth lens E9 has negative optical power, with its object-side surface S17 being convex and its image-side surface S18 being concave. The tenth lens E10 has positive refractive power, with its object-side surface S18 being convex and its image-side surface S19 being concave. The eleventh lens E11 has positive refractive power, with its object-side surface S20 being convex and its image-side surface S21 being concave. The filter E12 has an object-side surface S22 and an image-side surface S23. Light from an object sequentially passes through surfaces S1 to S23 and is ultimately imaged on an imaging surface S24.

[0062] Table 1 shows the surface type, curvature radius, thickness, and material of each lens of the optical imaging lens of Example 1, wherein 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 1000000 1000 S1 spherical surface 19.730 0.77 1.51，64.20 S2 spherical surface 16.480 1.03 1.91,35.25 S3 spherical surface 6.974 3.92 S4 spherical surface 26.400 0.74 1.88,39.21 S5 spherical surface 4.800 2.87 S6 Aspheric -59.318 1.03 1.53,55.71 S7 Aspheric 19.726 0.4 S8 spherical surface 33.995 2.40 1.84,23.78 S9 spherical surface -79.35 0.1 S10 flat Infinity 8.88 1.94,17.94 S11 flat Infinity 0.1 S12 Aspheric 5.860 2.69 1.61,63.85 S13 Aspheric -8.530 0.12 S14 Aspheric 4.070 0.68 1.53,55.71 S15 Aspheric 4.800 1.16 STO flat Infinity 0.26 S17 spherical surface 7.060 0.50 1.84,23.78 S18 spherical surface 2.250 1.50 1.59,68.34 S19 spherical surface 17.280 0.60 S20 Aspheric 8.437 1.31 1.53,55.71 S21 Aspheric 8.582 0.60 S22 flat Infinity 0.3000 1.48,70.23 S23 flat Infinity 0.679 S24 flat Infinity /

[0065] In Table 1, any one of the object side and image side surfaces of the fourth lens element E4, the seventh lens element E7, the eighth lens element E8, and the eleventh lens element E11 is aspherical. The surface shape of each aspherical lens element 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]

[0070] Specifically, as a preferred embodiment of the present invention but not limiting, the following reference is made to Figures 3 and 4 The optical imaging lens according to Example 2 of the present application is described. Figure 3 A schematic structural diagram of an optical imaging lens according to Example 2 of the present application is shown.

[0071] like Figure 3 As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a reflective element E6, a seventh lens E7, an eighth lens E8, STO, a ninth lens E9, a tenth lens E10, an eleventh lens E11, a filter E12, and an imaging surface S24.

[0072] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S6 being concave and its image-side surface S7 being concave. The fifth lens E5 has positive optical power, with its object-side surface S8 being flat and its image-side surface S9 being convex. The seventh lens E7 has positive optical power, with its object-side surface S12 being convex and its image-side surface S13 being convex. The eighth lens E8 has positive optical power, with its object-side surface S14 being convex and its image-side surface S15 being concave. The ninth lens E9 has negative optical power, with its object-side surface S17 being convex and its image-side surface S18 being concave. The tenth lens E10 has positive refractive power, with its object-side surface S18 being convex and its image-side surface S19 being concave. The eleventh lens E11 has positive refractive power, with its object-side surface S20 being convex and its image-side surface S21 being concave. The filter E12 has an object-side surface S22 and an image-side surface S23. Light from an object sequentially passes through surfaces S1 to S23 and is ultimately imaged on an imaging surface S24.

[0073] 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 millimeters (mm).

[0074] Table 3: Basic parameters of the optical system of Example 2

[0075] Face number Surface type Curvature radius (mm) Thickness (mm) Material OBJ spherical surface 1000000 1000 S1 spherical surface 21.360 0.74 1.51，64.20 S2 spherical surface 14.325 1.00 1.91,35.25 S3 spherical surface 6.585 2.81 S4 spherical surface 10.877 0.60 1.88,39.21 S5 spherical surface 4.369 4.21 S6 Aspheric -9.882 0.80 1.53,55.71 S7 Aspheric 50.000 0.28 S8 spherical surface Infinity 1.32 1.84,23.78 S9 spherical surface -22.620 0.10 S10 flat Infinity 8.88 1.94,17.94 S11 flat Infinity 0.10 S12 Aspheric 6.000 2.76 1.61,63.85 S13 Aspheric -8.775 0.19 S14 Aspheric 4.700 1.11 1.53,55.71 S15 Aspheric 4.766 0.90 STO flat Infinity 0.10 S17 spherical surface 6.195 0.80 1.84,23.78 S18 spherical surface 2.135 1.34 1.59,68.34 S19 spherical surface 14.012 0.43 S20 Aspheric 7.550 1.80 1.53,55.71 S21 Aspheric 14.835 0.60 S22 flat Infinity 0.30 1.48,70.23 S23 flat Infinity 0.66 S24 flat Infinity /

[0076] In Table 3, any one of the object side and image side surfaces of the fourth lens element E4, the seventh lens element E7, the eighth lens element E8, and the eleventh lens element E11 is aspherical. The surface shape of each aspherical lens element can be defined by, but not limited to, the following aspherical surface formula:

[0077]

[0078] 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 the second embodiment.

[0079] Table 4: Aspheric surface related values ​​of the lens surface of Example 2

[0080]

[0081] Specifically, as a preferred embodiment of the present invention but not limiting, the following reference is made to Figures 5 and 6 The optical imaging lens according to Example 3 of the present application is described. Figure 5 A schematic structural diagram of an optical imaging lens according to Example 3 of the present application is shown.

[0082] like Figure 5 As shown, the optical imaging lens according to an exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a reflective element, a seventh lens E7, an eighth lens E8, STO, a ninth lens E9, a tenth lens E10, an eleventh lens E11, a filter E12, and an imaging surface S24.

[0083] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S6 being concave and its image-side surface S7 being convex. The fifth lens E5 has positive optical power, with its object-side surface S8 being concave and its image-side surface S9 being convex. The seventh lens E7 has positive optical power, with its object-side surface S12 being convex and its image-side surface S13 being convex. The eighth lens E8 has positive optical power, with its object-side surface S14 being convex and its image-side surface S15 being concave. The ninth lens E9 has negative optical power, with its object-side surface S17 being convex and its image-side surface S18 being concave. The tenth lens E10 has positive refractive power, with its object-side surface S18 being convex and its image-side surface S19 being concave. The eleventh lens E11 has positive refractive power, with its object-side surface S20 being convex and its image-side surface S21 being concave. The filter E12 has an object-side surface S22 and an image-side surface S23. Light from an object sequentially passes through surfaces S1 to S23 and is ultimately imaged on an imaging surface S24.

[0084] 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 millimeters (mm).

[0085] Table 5: Basic parameters of the optical system of Example 3

[0086]

[0087]

[0088] In Table 5, any one of the object side and image side surfaces of the fourth lens E4, the seventh lens E7, the eighth lens E8, and the eleventh lens E11 is aspherical. The surface shape of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0089]

[0090] 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 6 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 the first embodiment.

[0091] Table 6: Aspheric surface related values ​​of the lens surface of Example 3

[0092]

[0093] In Examples 1-3, the basic data are shown in Table 7 below:

[0094] Table 7 Basic data of Examples 1-3

[0095] Basic data / Example 1 2 3 f1(mm) -210.02 -81.04 -88.8 f2(mm) -13.93 -14.18 -14.18 f3(mm) -6.72 -8.6 -6.68 f4(mm) -27.45 -15.3 -43.59 f5(mm) 28.17 26.51 28.98 f7(mm) 6.03 6.18 6.03 f8(mm) 37.61 91.97 40.68 f9(mm) -4.066 -4.2 -3.75 f10(mm) 4.196 4.066 3.93 f11(mm) 223.85 26.36 156.56 f(mm) 1.762 1.767 1.743 f123(mm) -3.724 -4.43 -3.63 f910(mm) -42.83 -65.34 -30.85 TTL(mm) 32.64 31.82 32.19 Fno 2 1.98 1.99 FOV(°) 200 200 200

[0096] In Examples 1-3, the conditional formula is shown in Table 8 below:

[0097] Table 8 Conditional formula for Examples 1-3

[0098] Conditional formula / Example 1 2 3 D1 23.99 24.88 24.1 Ymax 3.212 3.161 3.226 Nd1 1.51 1.51 1.51 Vd1 64.19 64.19 64.19 Nd7 1.61 1.61 1.61 Vd7 63.85 63.85 63.85 Vd9 23.78 23.78 23.78 Vd10 68.34 68.34 68.34 CT1 0.77 0.74 0.8 CT2 1.03 1.00 1 CT3 0.74 0.60 0.6 CT4 1.03 0.80 1.32 CT5 2.4 1.32 2.4 D1 / (Fno*Ymax) 3.734433375 3.975215617 3.754046114 TTL / (CT1+CT2+CT3+CT4+CT5) 5.467336683 7.134529148 5.259803922 |f123 / f| 2.113507378 2.507074137 2.082616179 |f8 / f910| 0.878122811 1.407560453 1.318638574 f910 / f -24.30760499 -36.97792869 -17.6993689

[0099] A camera module includes at least an optical lens, in which a panoramic fisheye optical system is installed. The optical system is mainly composed of 10 lenses and 1 reflective element. Through the reasonable combination of lens shapes, the optical system can meet the ultra-wide-angle requirements while also effectively reducing the system volume, achieving the performance requirements of large high pixels. In addition, the use of reflective elements further reduces the height of the system, making the product compact and enhancing the user experience.

[0100] The above descriptions are provided in conjunction with specific content to provide one or more embodiments, and the specific implementation of the present invention is not limited to these descriptions. Any similarity or similarity with the methods, structures, etc. of the present invention, or any technical deduction or substitution based on the concept of the present invention, shall be considered within the scope of protection of the present invention.

Claims

1. A panoramic fisheye optical system, characterized by: Along the optical axis, from the object plane to the image plane, it is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a reflective element, a seventh lens, an eighth lens, a ninth lens, a tenth lens, and an eleventh lens. The first lens has negative optical power, its object side surface is convex, and its image side surface is concave; The second lens has negative optical power and its image side surface is concave; The first lens and the second lens constitute a first cemented lens, the optical power of which is negative; The third lens has negative optical power, its object side surface is convex, and its image side surface is concave; The fourth lens has negative optical power and its object side surface is concave; The fifth lens has a positive optical power and a convex image-side surface; The reflective element is used to reflect the light beam passing through the fifth lens to the seventh lens; The seventh lens has positive refractive power, and both the object-side surface and the image-side surface are convex; The eighth lens has positive refractive power, its object-side surface is convex, and its image-side surface is concave; The ninth lens has negative optical power, its object-side surface is convex, and its image-side surface is concave; The tenth lens has positive refractive power, its object-side surface is convex, and its image-side surface is concave; The ninth lens and the tenth lens constitute a second cemented lens, and the optical power thereof is negative; The eleventh lens has positive refractive power, its object-side surface is convex, and its image-side surface is concave; The optical system satisfies the following relationship: 1.92<|f123 / f|<2.73; Wherein, f123 is the effective combined focal length of the first lens, the second lens, and the third lens, and f is the effective focal length of the optical system.

2. The panoramic fisheye optical system according to claim 1, wherein: The optical system satisfies the following relationship: Nd1 < 1.52, Vd1 > 64; Wherein, Nd1 is the refractive index of the first lens material, and Vd1 is the Abbe number of the first lens.

3. The panoramic fisheye optical system according to claim 1, wherein: The optical system satisfies the following relationship: 0.8<|f8 / f910|<1.6; Wherein, f8 is the effective focal length of the eighth lens, and f910 is the effective focal length of the second cemented lens.

4. The panoramic fisheye optical system according to any one of claims 1 to 3, wherein: The optical system satisfies the following relationship: -38.2<f910 / f<-16.1; and / or Vd9<23.8,Vd10>68; Wherein, f910 is the effective focal length of the second cemented lens, f is the effective focal length of the optical system, Vd9 is the Abbe number of the ninth lens, and Vd10 is the Abbe number of the tenth lens.

5. The panoramic fisheye optical system according to any one of claims 1 to 3, wherein: The optical system satisfies the following relationship: Nd7<1.62, Vd7>63; Wherein, Nd7 is the refractive index of the seventh lens, and Vd7 is the Abbe number of the seventh lens.

6. The panoramic fisheye optical system according to any one of claims 1 to 3, wherein: The optical system satisfies the following relationship: D1 / (Fno*Ymax)<4.10; Wherein, D1 is the maximum effective diameter of the first lens, Fno is the system aperture, and Ymax is the maximum image circle radius of the system.

7. The panoramic fisheye optical system according to any one of claims 1 to 3, characterized in that: The optical system satisfies the following relationship: 5.0<TTL / (CT1+CT2+CT3+CT4+CT5)<8.1; Wherein, TTL is the on-axis distance from the object side of the first lens to the imaging surface of the system, CT1 is the thickness of the first lens on the optical axis, CT2 is the thickness of the second lens on the optical axis, CT3 is the thickness of the third lens on the optical axis, CT4 is the thickness of the fourth lens on the optical axis, and CT5 is the thickness of the fifth lens on the optical axis.

8. The panoramic fisheye optical system according to any one of claims 1 to 3, wherein: The aperture is located between the eighth lens and the ninth lens; and / or The full field angle of the optical system is ≥200°, and the total length of the lens is ≤33mm.

9. A camera module, comprising at least an optical lens, characterized in that: The panoramic fisheye optical system according to any one of claims 1 to 8 is installed in the optical lens.

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