A high-pixel panoramic fisheye optical system and camera module

Abstract

The present invention discloses a high-pixel panoramic fisheye optical system and a camera module, which are composed of a first lens, a second lens, a third lens, a fourth lens, a reflective component, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens in sequence along the optical axis from the object plane to the image plane. By reasonably matching the lens shape and optical focal length, the volume of the optical system can be effectively reduced, and the performance requirements of large aperture and high pixel can be achieved. The use of reflective components further reduces the height of the system, and the external dimensions of the device can be perfectly compressed. It has the advantages of high pixel, large target surface, ultra-wide angle, and athermal design, has a compact structure, is easy to process and install, and further improves the imaging effect of the equipment equipped with the system.

Description

Technical Field

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

[0002] In recent years, with the widespread application of panoramic VR / AR and the diversification of its application scenarios, the quality requirements for lenses have become increasingly higher. The low-pixel, small-target COMS chip and the large-volume lens design with poor imaging clarity cannot meet the requirements of the majority of photography enthusiasts. Summary of the Invention

[0003] In order to overcome the common problems of low-pixel, small-target COMS chips and poor large-volume imaging clarity in existing lens designs, this application provides a high-pixel panoramic fisheye optical system with the advantages of high pixels, large target area, ultra-wide angle, and athermal design. It has a compact structure and is easy to process and install, further improving the imaging effect of the equipment equipped with this system.

[0004] A high-pixel panoramic fisheye optical system, which is composed of a first lens, a second lens, a third lens, a fourth lens, a reflective element, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth 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 third lens has positive refractive power, its object-side surface is convex, and its image-side surface is convex;

[0008] The fourth lens has negative optical power and its object side surface is concave;

[0009] The reflective component is used to reflect the light beam passing through the fourth lens to the sixth lens;

[0010] The sixth lens has positive refractive power, its object-side surface is convex, and its image-side surface is convex;

[0011] The seventh lens has optical power, its object-side surface is convex, and its image-side surface is concave;

[0012] The eighth lens has negative optical power, its object-side surface is convex, and its image-side surface is concave;

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

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

[0015] The optical system satisfies the following condition: D1 / (Fno*Ymax) < 4.03;

[0016] where D1 is the maximum effective optical diameter of the first lens, Fno is the system aperture, and Ymax is the maximum image circle radius of the system.

[0017] Preferably, the optical system satisfies the following conditions:

[0018] (dn / dt)7 < -3*10 -06 / °C; and / or

[0019] R13 / R12 > 0.8;

[0020] where (dn / dt)7 is the refractive index temperature coefficient of the seventh lens, R12 is the object-side curvature of the seventh lens, and R13 is the image-side curvature of the seventh lens.

[0021] Preferably, the optical system satisfies the following conditions:

[0022] f34 / f1 < -1.5; and / or

[0023] 1.61 < f1 / f2;

[0024] where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and f34 is the effective combined focal length of the third and fourth lenses.

[0025] Preferably, the optical system satisfies the following conditions: -2.8 < f4 / f3 < -1.22; and / or

[0026] 1.5 < Vd4 / Vd3 < 4.6; [[ID=�7]]

[0027] where f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, Vd3 is the Abbe number of the material of the third lens, and Vd4 is the Abbe number of the material of the fourth lens.

[0028] Preferably, the optical system satisfies the following conditions: -1.23 < f9 / f8 < -0.62; and / or

[0029] 1.5 < Vd16 / Vd15 < 4.6;

[0030] where f8 is the effective focal length of the eighth lens, f9 is the effective focal length of the ninth lens, Vd15 is the Abbe number of the material of the eighth lens, and Vd16 is the Abbe number of the material of the ninth lens.

[0031] Preferably, the optical system satisfies the following conditions: Nd1 > 1.8; and / or

[0032] Nd5 > 1.8;

[0033] Wherein, Nd1 is the refractive index of the first lens material, and Nd5 is the refractive index of the reflective component material.

[0034] Preferably, the full field of view FOV and total optical length TTL of the optical system satisfy: 180°≤FOV≤240°, TTL≤35.0 mm.

[0035] Preferably, the third lens and the fourth lens constitute a cemented lens, and the optical power thereof is positive; and / or

[0036] The eighth lens and the ninth lens constitute a cemented lens, and the optical power thereof is negative.

[0037] Preferably, the second lens, the sixth lens, the seventh lens, and the tenth lens are all aspherical lenses;

[0038] The first lens, the third lens, the fourth lens, the eighth lens, and the ninth lens are all spherical lenses;

[0039] The aperture is located between the seventh lens and the eighth lens.

[0040] On the other hand, an embodiment of the present application also provides a camera module, which includes at least an optical lens, and the above-mentioned high-pixel panoramic fisheye optical system is installed in the optical lens.

[0041] Compared with the prior art, the present invention has the following advantages:

[0042] The optical system and camera module of the embodiment of the present invention are composed of a first lens, a second lens, a third lens, a fourth lens, a reflective component, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens in sequence along the optical axis from the object plane to the image plane. By reasonably matching the lens shape and optical focal length, the volume of the optical system can be effectively reduced, and the performance requirements of large aperture and high pixel can be achieved. The use of reflective components further reduces the height of the system, and the external dimensions of the device can be perfectly compressed. It has the advantages of high pixel, large target surface, ultra-wide angle, and athermal design, with a compact structure, easy processing and installation, and further improves the imaging effect of the equipment equipped with the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] 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.

[0044] Figure 1 Schematic diagram of the structure of the optical system or camera module of Example 1 of the present application;

[0045] Figure 2is the distortion curve of the optical system or camera module of Example 1 of the present application;

[0046] Figure 3 2 is a schematic structural diagram of an optical system or camera module according to embodiment 2 of the present application;

[0047] Figure 4 is the distortion curve of the optical system or camera module of Example 2 of the present application;

[0048] Figure 5 Schematic diagram of the structure of the optical system or camera module of Example 3 of the present application;

[0049] Figure 6 is the distortion curve of the optical system or camera module of Example 3 of the present application; DETAILED DESCRIPTION

[0050] like Figure 1-6 As shown, the present application provides a high-pixel panoramic fisheye optical system, a high-pixel panoramic fisheye optical system, which is composed of a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a reflective element 5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, and a tenth lens E10 in order from the object plane to the image plane along the optical axis;

[0051] The first lens E1 has negative refractive power, its object-side surface is convex, and its image-side surface is concave;

[0052] The second lens E2 has negative refractive power, and its image side surface is concave;

[0053] The third lens E3 has positive refractive power, its object-side surface is convex, and its image-side surface is convex;

[0054] The fourth lens E4 has negative optical power, and its object side surface is concave;

[0055] The reflective element 5 is used to reflect the light beam passing through the fourth lens E4 to the sixth lens E6;

[0056] The sixth lens E6 has positive refractive power, its object-side surface is convex, and its image-side surface is convex;

[0057] The seventh lens E7 has an optical power, an object-side surface thereof is convex, and an image-side surface thereof is concave;

[0058] The eighth lens E8 has negative refractive power, its object-side surface is convex, and its image-side surface is concave;

[0059] The ninth lens element E9 has positive refractive power, its object-side surface is convex, and its image-side surface is convex;

[0060] The tenth lens E10 has negative optical power, and its image side surface is convex.

[0061] An embodiment of the present application discloses a high-pixel panoramic fisheye optical system, which is composed of a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a reflective element 5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, and a tenth lens E10 along the optical axis from the object plane to the image plane. By reasonably matching the lens shapes and optical focal lengths, the volume of the optical system can be effectively reduced, and the performance requirements of large aperture and high pixel can be achieved. The use of the reflective element 5 further reduces the height of the system, and the external dimensions of the device can be perfectly compressed. It has the advantages of high pixel, large target area, ultra-wide angle, and athermal design, and has a compact structure and is easy to process and install, further improving the imaging effect of the device equipped with the system.

[0062] Furthermore, the optical system satisfies the following condition: D1 / (Fno*Ymax)<4.03; wherein D1 is the maximum optical effective diameter of the first lens E1, Fno is the system aperture, and Ymax is the maximum image circle radius of the system. By limiting the size of the maximum image circle and the aperture of the optical imaging system, the optical effective diameter of the first lens is limited, thereby ensuring that the system meets the requirements of miniaturization.

[0063] Preferably, the optical system satisfies the following conditions: (dn / dt)7<-3*10 -06 / °C; wherein, (dn / dt)7 is the refractive index temperature coefficient of the seventh lens element E7. By reasonably setting the seventh lens element E7 to have a negative refractive index temperature coefficient, the temperature performance is effectively improved.

[0064] Preferably, the optical system satisfies the following condition: R13 / R12>0.8, where R12 is the object-side curvature of the seventh lens element E7, and R13 is the image-side curvature of the seventh lens element E7. By controlling the radii of curvature of the object-side and image-side surfaces of the seventh lens element E7, the incident angle of the chief ray at the image plane for each field of view of the optical imaging lens can be relatively reasonably controlled, meeting the chief ray incident angle requirements of the optical system design. Furthermore, the negative refractive index temperature coefficient effectively improves temperature performance.

[0065] Preferably, the optical system satisfies the following condition: f34 / f1 < -1.5, where f1 is the effective focal length of the first lens element E1, and f34 is the combined effective focal length of the third and fourth lenses E3 and E4. By properly controlling the effective focal length ratio of the first lens element E1 to the cemented lens 1, the optical system can achieve a wide field of view while limiting the effective diameter of components, controlling the overall optical system size, and adjusting the angle of incidence of light, thereby facilitating the correction of aberrations in the system's rear-group.

[0066] Preferably, the optical system satisfies the following conditions: 1.61 < f1 / f2; where f1 is the effective focal length of the first lens E1, and f2 is the effective focal length of the second lens E2. By controlling the ratio of the effective focal lengths of the first lens E1 and the second lens E2 of the optical system, on the one hand, it is beneficial to control the height of the incident light beam entering the optical system to reduce the high-order aberrations of the optical system and the outer diameter of the lens; on the other hand, while controlling costs, the use of an aspherical surface for the second lens E2 can better correct the distortion of the system and reduce the astigmatism to meet the customer's requirements for pixel density.

[0067] Preferably, the optical system satisfies the following conditions: -2.8 < f4 / f3 < -1.22; where f3 is the effective focal length of the third lens E3, and f4 is the effective focal length of the fourth lens E4. By limiting the ratio of the effective focal lengths of the third lens E3 and the fourth lens E4, the deflection angle of the light rays of the optical system can be made small, and the sensitivity to component tolerances can be effectively reduced.

[0068] Preferably, the optical system satisfies the following conditions: 1.5 < Vd4 / Vd3 < 4.6; where Vd3 is the Abbe number of the material of the third lens E3, and Vd4 is the Abbe number of the material of the fourth lens E4. This design can effectively reduce chromatic aberration, optimize the lens aberration, and thus effectively improve the imaging quality of the system.

[0069] Preferably, the optical system satisfies the following conditions: -1.23 < f9 / f8 < -0.62, 1.5 < Vd16 / Vd15 < 4.6; where f8 is the effective focal length of the eighth lens E8, f9 is the effective focal length of the ninth lens E9, Vd15 is the Abbe number of the material of the eighth lens E8, and Vd16 is the Abbe number of the material of the ninth lens E9. By limiting the ratio of the effective focal lengths of the eighth lens E8 and the ninth lens E9, the astigmatism of the system can be effectively corrected, and thus the image quality of the edge field of view can be ensured. At the same time, by reasonably matching the Abbe numbers of the materials, the chromatic aberration of the system can be further reduced, and the imaging quality of the system can be improved.

[0070] Preferably, the optical system satisfies the following conditions: Nd1 > 1.8, Nd5 > 1.8; where Nd1 is the refractive index of the material of the first lens E1, and Nd5 is the refractive index of the material of the reflective component 5. By using high-refractive-index materials, it helps to further reduce the outer diameter of the components and meet the customer's requirements for small size.

[0071] Preferably, the full field of view FOV and the total optical length TTL of the optical system satisfy: 180° ≤ FOV ≤ 240°, TTL ≤ 35.0 mm. This design can reduce the total optical length and effectively miniaturize the lens.

[0072] Preferably, the third lens E3 and the fourth lens E4 form a cemented lens with positive optical power; the use of the cemented lens effectively reduces the position chromatic aberration and magnification chromatic aberration data of the system.

[0073] Preferably, the eighth lens element E8 and the ninth lens element E9 form a cemented lens having negative optical power. The use of a cemented lens can effectively correct the system's astigmatism, thereby ensuring image quality at the edges of the field of view. It also further reduces the system's positional chromatic aberration and lateral chromatic aberration.

[0074] Preferably, the optical system satisfies the following conditions: the second lens E2, the sixth lens E6, the seventh lens E7, and the tenth lens E10 are all aspherical lenses; the first lens E1, the third lens E3, the fourth lens E4, the eighth lens E8, and the ninth lens E9 are all spherical lenses; and the aperture is located between the seventh lens E7 and the eighth lens E8. The optical system has the advantages of high pixel count, large target area, ultra-wide angle, and athermal design, and has a compact structure that is easy to process and install, further improving the imaging effect of the equipment used in the system.

[0075] Specifically, as a preferred embodiment of the present invention but not limiting, Figure 1-2 As shown in Example 1, an 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 reflective element 5, a sixth lens E6, a seventh lens E7, an STO, an eighth lens E8, a ninth lens E9, a tenth lens E10, a filter E11, and an imaging surface S22.

[0076] 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 concave and its image-side surface S4 being concave. The third lens E3 has positive 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 two side surfaces of the reflective element 5 are S8 and S9, respectively. The sixth lens E6 has positive optical power, with its object-side surface S10 being convex and its image-side surface S11 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 concave. The eighth lens E8 has negative optical power, with its object-side surface S15 being convex and its image-side surface S16 being concave. The ninth lens E9 has positive optical power, with its object-side surface S16 being convex and its image-side surface S17 being convex. The tenth lens element E10 has negative power, with a concave object-side surface S18 and a convex image-side surface S19. The filter E11 has an object-side surface S20 and an image-side surface S21. Light from an object passes through surfaces S1 through S21 in sequence and is ultimately imaged on imaging surface S22.

[0077] 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).

[0078] Table 1: Basic parameters of the optical system of Example 1

[0079] Face number Surface type Curvature radius (mm) Thickness (mm) Material OBJ spherical surface 100000 1000 S1 spherical surface 18.8017 1.8360 2.00,28.3 S2 spherical surface 6.6014 4.9011 S3 Aspheric -22.2779 1.2240 1.77,49.6 S4 Aspheric 5.9489 2.3052 S5 spherical surface 87.7384 2.0808 2.00,28.3 S6 spherical surface -9.9124 0.6120 1.59,68.3 S7 spherical surface 34.5005 0.5355 S8 flat endless 9.170 2.00,25.4 S9 flat endless 0.1 S10 Aspheric 4.5586 2.4480 1.62,63.9 S11 Aspheric -10.8428 0.0816 S12 Aspheric 4.4256 1.2138 1.62,63.9 S13 Aspheric 6.0090 0.2346 STO flat endless 0.1836 S15 spherical surface 24.7411 0.5712 1.85,23.8 S16 spherical surface 2.4704 1.8462 1.57,71.3 S17 spherical surface -9.7910 0.2397 S18 Aspheric -47.7274 1.3974 1.88,37.2 S19 Aspheric 52.5997 0.612 S20 flat endless 0.3000 1.49,71.2 S21 flat endless 0.916 S22 flat endless /

[0080] In Table 1, any one of the object side and image side of the first lens E2, the sixth lens E6, the seventh lens E7, and the tenth lens E10 is an aspherical surface. The surface shape of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0081]

[0082] 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.

[0083] Table 2: Aspheric surface related values ​​of the lens surface of Example 1

[0084]

[0085] Figure 1 FIG2 shows a schematic structural diagram of an optical imaging lens according to Example 1 of the present application. Figure 2 The distortion curve of the optical imaging lens of Example 1 is shown. As can be seen from the figure, it has the advantages of high pixels, large target area, ultra-wide angle, and athermal design. It has a compact structure and is easy to process and install, further improving the imaging effect of the system equipment.

[0086] Specifically, as a preferred embodiment of the present invention but not limiting, Figure 3-4 As shown in Example 2, the lens 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 reflective element 5, a sixth lens E6, a seventh lens E7, STO, an eighth lens E8, a ninth lens E9, a tenth lens E10, a filter E11, and an imaging surface S22.

[0087] 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 concave and its image-side surface S4 being concave. The third lens E3 has positive 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 two side surfaces of the reflective element 5 are S8 and S9, respectively. The sixth lens E6 has positive optical power, with its object-side surface S10 being convex and its image-side surface S11 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 concave. The eighth lens E8 has negative optical power, with its object-side surface S15 being convex and its image-side surface S16 being concave. The ninth lens E9 has positive optical power, with its object-side surface S16 being convex and its image-side surface S17 being convex. The tenth lens element E10 has negative power, with a concave object-side surface S18 and a convex image-side surface S19. The filter E11 has an object-side surface S20 and an image-side surface S21. Light from an object passes through surfaces S1 through S21 in sequence and is ultimately imaged on imaging surface S22.

[0088] 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).

[0089] Table 3: Basic parameters of the optical system of Example 2

[0090] Face number Surface type Curvature radius (mm) Thickness (mm) Material OBJ spherical surface 100000 1000 S1 spherical surface 18.4395 1.8000 2.00,28.3 S2 spherical surface 6.4715 4.8057 S3 Aspheric -21.6347 1.2000 1.77,49.6 S4 Aspheric 5.8605 2.2623 S5 spherical surface 82.9471 2.0318 2.00,28.3 S6 spherical surface -9.8796 0.6000 1.59,68.3 S7 spherical surface 36.7757 0.5122 S8 flat endless 9.0000 2.00,25.4 S9 flat endless 0.1000 S10 Aspheric 4.5460 2.3821 1.62,63.9 S11 Aspheric -10.0901 0.0800 S12 Aspheric 4.3717 1.1680 1.62,63.9 S13 Aspheric 5.4879 0.2413 STO flat endless 0.1988 S15 spherical surface 21.8614 0.5600 1.85,23.8 S16 spherical surface 2.5195 1.8480 1.59,68.5 S17 spherical surface -9.4206 0.2524 S18 Aspheric -35.0556 1.3194 1.88,37.2 S19 Aspheric 50.2217 0.6000 S20 flat endless 0.3000 1.49,71.2 S21 flat endless 0.8188 S22 flat endless /

[0091] In Table 3, any one of the object side and image side of the first lens E2, the sixth lens E6, the seventh lens E7, and the tenth lens E10 is aspherical. The surface shape of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0092]

[0093] 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.

[0094] Table 4: Aspheric surface related values ​​of the lens surface of Example 2

[0095]

[0096] Figure 3FIG2 shows a schematic structural diagram of an optical imaging lens according to Example 2 of the present application. Figure 4 The distortion curve of the optical imaging lens of Example 2 is shown. As can be seen from the figure, it has the advantages of high pixels, large target area, ultra-wide angle, and athermal design. It has a compact structure and is easy to process and install, further improving the imaging effect of the system equipment.

[0097] Specifically, as a preferred embodiment of the present invention but not limiting, Figure 5-6 As shown in Example 3, the lens 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 reflective element 5, a sixth lens E6, a seventh lens E7, STO, an eighth lens E8, a ninth lens E9, a tenth lens E10, a filter E11, and an imaging surface S22.

[0098] 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 concave and its image-side surface S4 being concave. The third lens E3 has positive 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 two side surfaces of the reflective element 5 are S8 and S9, respectively. The sixth lens E6 has positive optical power, with its object-side surface S10 being convex and its image-side surface S11 being convex. The seventh lens E7 has negative optical power, with its object-side surface S12 being convex and its image-side surface S13 being concave. The eighth lens E8 has negative optical power, with its object-side surface S15 being convex and its image-side surface S16 being concave. The ninth lens E9 has positive optical power, with its object-side surface S16 being convex and its image-side surface S17 being convex. The tenth lens element E10 has negative power, with a concave object-side surface S18 and a convex image-side surface S19. The filter E11 has an object-side surface S20 and an image-side surface S21. Light from an object passes through surfaces S1 through S21 in sequence and is ultimately imaged on imaging surface S22.

[0099] 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).

[0100] Table 5: Basic parameters of the optical system of Example 3

[0101] Face number Surface type Curvature radius (mm) Thickness (mm) Material OBJ spherical surface 100000 1000 S1 spherical surface 18.6268 2.2000 2.00,28.3 S2 spherical surface 6.4803 4.8335 S3 Aspheric -16.9752 1.2000 1.77,49.6 S4 Aspheric 6.4628 1.9703 S5 spherical surface 21.0789 1.8000 1.76,26.6 S6 spherical surface -21.6866 0.6000 1.73,54.7 S7 spherical surface -254.0905 0.3179 S8 flat endless 9.160 2.00,25.4 S9 flat endless 0.1 S10 Aspheric 5.5912 2.1021 1.80,45.4 S11 Aspheric -18.2609 0.1000 S12 Aspheric 3.7251 1.2336 1.50,81.6 S13 Aspheric 3.1998 0.2574 STO flat endless 0.1339 S15 spherical surface 6.4755 0.5000 1.95,17.9 S16 spherical surface 2.4500 1.7223 1.57,71.3 S17 spherical surface -9.4230 0.6145 S18 Aspheric -30.0000 1.2489 1.88,37.2 S19 Aspheric 52.7361 0.6000 S20 flat endless 0.3000 1.49,71.2 S21 flat endless 0.9664 S22 flat endless

[0102] In Table 5, any one of the object side and image side of the first lens E2, the sixth lens E6, the seventh lens E7, and the tenth lens E10 is aspherical. The surface shape of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0103]

[0104] 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 Example 3.

[0105] Table 6: Aspheric surface related values ​​of the lens surface of Example 3

[0106]

[0107] Furthermore, in Examples 1-3, the basic data are as shown in Table 7:

[0108] Table 7: Basic data of Examples 1-3

[0109] Basic data Example 1 Example 2 Example 3 f1(mm) -10.90 -10.68 -10.83 f2(mm) -5.93 -5.82 -5.89 f3(mm) 8.92 8.84 14.20 f4(mm) -12.89 -13.04 -32.44 F6(mm) 5.51 5.39 5.54 F7(mm) 20.92 24.73 -207.89 F8(mm) -3.26 -3.38 -4.39 F9(mm) 3.66 3.55 3.60 F10(mm) -27.99 -23.08 -21.38 f(mm) 1.731 1.66 1.861 F34(mm) 27.60 26.28 24.58 F89(mm) -63.98 223.24 18.22 TTL(mm) 32.81 32.08 31.96 Fno 2.00 2.0 2.0 FOV(°) 200.0 200.0 200.0

[0110] Furthermore, in Examples 1-3, each conditional formula satisfies the conditions in Table 8 below:

[0111] Table 8: Conditional formulas for Examples 1-3

[0112] Conditional expression Example 1 Example 2 Example 3 D1 22.86 22.48 23.40 Ymax 3.291 3.161 3.469 Vd3 28.32 28.32 26.61 Vd4 68.53 68.52 54.67 R12 4.4256 4.3717 3.7251 R13 6.0090 5.4879 3.1998 Nd1 2.00 2.00 2.00 Nd5 2.00 2.00 2.00 Vd15 23.79 23.79 17.94 Vd16 71.31 68.53 71.31 D1 / (Fno*Ymax) 3.473 3.556 3.373 f34 / f1 -2.532 -2.461 -2.270 f4 / f3 -1.445 -1.475 -2.285 Vd4 / Vd3 2.42 2.42 2.05 R13 / R12 1.358 1.255 0.859 f9 / f8 -1.124 -1.049 -0.820 Vd16 / Vd15 2.998 2.881 3.974 f1 / f2 1.838 1.834 1.837

[0113] A camera module includes at least an optical lens, in which the above-mentioned high-pixel panoramic fisheye optical system is installed. The optical system is composed of a first lens, a second lens, a third lens, a fourth lens, a reflective component, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens in sequence along the optical axis from the object plane to the image plane. By reasonably matching the lens shape and optical focal length, the volume of the optical system can be effectively reduced, and the performance requirements of large aperture and high pixel can be achieved. The use of reflective components further reduces the height of the system, and the external dimensions of the equipment can be perfectly compressed. It has the advantages of high pixel, large target surface, ultra-wide angle, and athermal design, has a compact structure, is easy to process and install, and further improves the imaging effect of the equipment matched with the system.

[0114] 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 high-pixel 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 reflective element, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth 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, its object side surface is concave, and its image side surface is concave; The third lens has positive refractive power, its object-side surface is convex, and its image-side surface is convex; The fourth lens has negative optical power and its object side surface is concave; The reflective component is used to reflect the light beam passing through the fourth lens to the sixth lens; The sixth lens has positive refractive power, its object-side surface is convex, and its image-side surface is convex; The seventh lens has optical power, its object-side surface is convex, and its image-side surface is concave; The eighth lens has negative optical power, its object-side surface is convex, and its image-side surface is concave; The ninth lens has positive refractive power, its object-side surface is convex, and its image-side surface is convex; The tenth lens has negative optical power, its image side surface is concave, and its image side surface is concave; The optical system meets the following conditions: D1 / (Fno*Ymax)<4.03,(dn / dt)7<-3*10 -06 / ℃; Wherein, D1 is the optical maximum effective diameter of the first lens, Fno is the system aperture, Ymax is the system maximum image circle radius, and (dn / dt)7 is the refractive index temperature coefficient of the seventh lens.

2. The high-pixel panoramic fisheye optical system according to claim 1, characterized in that: The optical system meets the following conditions: R13 / R12 > 0.8; Wherein, R12 is the object-side curvature of the seventh lens, and R13 is the image-side curvature of the seventh lens.

3. The high-pixel panoramic fisheye optical system according to claim 1, wherein: The optical system meets the following conditions: f34 / f1<-1.5; and / or 1.61 < f1 / f2; Wherein, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and f34 is the effective combined focal length of the third lens and the fourth lens.

4. The high-pixel panoramic fisheye optical system according to claim 1, wherein: The optical system satisfies the following conditions: -2.8 < f4 / f3 < -1.22; and / or 1.5 < Vd4 / Vd3 < 4.6; Wherein, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, Vd3 is the material Abbe constant of the third lens, and Vd4 is the material Abbe constant of the fourth lens.

5. The high-pixel panoramic fisheye optical system according to claim 1, wherein: The optical system satisfies the following conditions: -1.23 < f9 / f8 < -0.62; and / or 1.5 < Vd16 / Vd15 < 4.6; Wherein, f8 is the effective focal length of the eighth lens, f9 is the effective focal length of the ninth lens, Vd15 is the material Abbe constant of the eighth lens, and Vd16 is the material Abbe constant of the ninth lens.

6. The high-pixel panoramic fisheye optical system according to claim 1, wherein: The optical system meets the following conditions: Nd1 > 1.8; and / or Nd5 > 1.8; Wherein, Nd1 is the refractive index of the first lens material, and Nd5 is the refractive index of the reflective component material.

7. The high-pixel panoramic fisheye optical system according to claim 1, wherein: The full field of view (FOV) and total optical length (TTL) of the optical system satisfy the following requirements: 180°≤FOV≤240°, and TTL≤35.0 mm.

8. The high-pixel panoramic fisheye optical system according to claim 1, wherein: The third lens and the fourth lens form a cemented lens, and the optical power thereof is positive; and / or The eighth lens and the ninth lens constitute a cemented lens, and the optical power thereof is negative.

9. The high-pixel panoramic fisheye optical system according to claim 1, wherein: The second lens, the sixth lens, the seventh lens, and the tenth lens are all aspherical lenses; The first lens, the third lens, the fourth lens, the eighth lens, and the ninth lens are all spherical lenses; The aperture is located between the seventh lens and the eighth lens.

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

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