High-pixel confocal panoramic fisheye optical system and application camera module thereof

Abstract

This invention provides a high-pixel confocal panoramic fisheye optical system and its application camera module, mainly composed of 7 lenses. The first lens has negative optical power, with a convex object-side surface and a concave image-side surface; the second lens has negative optical power and a concave image-side surface; the third lens has negative optical power, with a concave object-side surface and a convex image-side surface; the fourth lens has positive optical power and a convex object-side surface; the fifth lens has positive optical power, with a convex object-side surface and a convex image-side surface; the sixth lens has negative optical power, with a concave object-side surface and either a concave or convex image-side surface; and the seventh lens has positive optical power, with a convex object-side surface and either a concave or convex image-side surface. Through the reasonable combination of lens shape and optical power, it has the advantages of high pixel count, infrared confocal, ultra-wide angle, and large aperture, realizing the performance requirements of large aperture and high pixel count, and further improving the imaging effect of the system.

Description

Technical Field

[0001] This application relates to the field of optical imaging, and in particular to a high-pixel, large-area panoramic confocal fisheye optical system and its application in camera modules. Background Technology

[0002] In recent years, as the application scope of panoramic VR / AR has gradually expanded, the application scenarios of fisheye lenses have become more diversified; consumers have put forward increasingly higher requirements for the resolution and portability of lenses; existing lenses on the market generally have defects such as low pixel count, small sensor chip target surface, and low image clarity, and such lens designs are no longer able to meet the increasingly higher usage needs of photography enthusiasts. Summary of the Invention

[0003] This application aims to address the shortcomings of existing fisheye lenses, such as low pixel count, small sensor chip target area, and low image clarity, and provides a high-pixel confocal panoramic fisheye optical system with the advantages of high pixel count and wide angle. At the same time, the large aperture configuration can increase the amount of light entering the optical system and achieve higher image quality.

[0004] A high-pixel confocal panoramic fisheye optical system is composed of a first lens, a second lens, a third lens, a fourth lens, an aperture stop, a fifth lens, a sixth lens, and a seventh lens in sequence along the optical axis from the object plane to the image plane.

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

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

[0007] The third lens has negative optical power, its object side is concave, and its image side is convex.

[0008] The fourth lens has positive optical power and its object side is convex.

[0009] The fifth lens has positive optical power, and its object side is convex, and its image side is convex.

[0010] The sixth lens has negative optical power, its object side is concave, and its image side is either convex or concave.

[0011] The seventh lens has positive optical power, its object side is convex, and its image side is either convex or concave.

[0012] Preferably, the optical system satisfies the following relationship: 0.3 < |f12| / |f3| < 0.6;

[0013] Where f12 is the effective combined focal length of the first and second lenses, and f3 is the effective focal length of the third lens.

[0014] Preferably, the optical system satisfies the following relationship: 0.4 < |f4| / |f56| < 0.6;

[0015] Where f4 is the effective focal length of the fourth lens, and f56 is the effective combined focal length of the fifth and sixth lenses.

[0016] Preferably, the optical system satisfies the following relationship: 2.5 <f7 / f<4.0;

[0017] -2.1 <f6 / f<-0.7;

[0018] Where f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, and f is the effective focal length of the optical system.

[0019] Preferably, 0.1 < (f3 + f4) / (f3 - f4) < 0.4;

[0020] Where f3 is the effective focal length of the third lens and f4 is the effective focal length of the fourth lens.

[0021] Preferably, the optical system satisfies the following relationship: 2.5 < (f - f12) / f < 3.1;

[0022] Where f is the effective focal length of the optical system, and f12 is the effective combined focal length of the first lens and the second lens.

[0023] Preferably, the optical system satisfies the following relationship: 0.1 <f123 / f234<0.4;

[0024] Where f123 is the effective combined focal length of the first, second, and third lenses, and f234 is the effective combined focal length of the second, third, and fourth lenses.

[0025] Preferably, the optical system satisfies the following relationship: 1.3 < (R6 - R7) / R7 < 1.5; and / or

[0026] -1.2 <R11 / R15+R12 / R14<-0.4;

[0027] Wherein, R6 is the radius of curvature of the object side of the third lens, R7 is the radius of curvature of the image side of the third lens, R11 is the radius of curvature of the object side of the fifth lens, R12 is the radius of curvature of the image side of the fifth lens, R14 is the radius of curvature of the object side of the seventh lens, and R15 is the radius of curvature of the image side of the seventh lens.

[0028] Preferably, the optical system satisfies the following relationship: D1 / (Fno*Ymax) < 2.0; where 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.

[0029] On the other hand, this application embodiment also provides a camera module, which includes at least an optical lens, and the optical lens is equipped with the above-mentioned high-pixel confocal panoramic fisheye optical system.

[0030] Compared with the prior art, the beneficial effects of this application are as follows:

[0031] This invention provides a high-pixel confocal panoramic fisheye optical system and its application camera module, mainly composed of 7 lenses. The first lens has negative optical power, with a convex object-side surface and a concave image-side surface; the second lens has negative optical power and a concave image-side surface; the third lens has negative optical power, with a concave object-side surface and a convex image-side surface; the fourth lens has positive optical power and a convex object-side surface; the fifth lens has positive optical power, with a convex object-side surface and a convex image-side surface; the sixth lens has negative optical power, with a concave object-side surface and either a concave or convex image-side surface; and the seventh lens has positive optical power, with a convex object-side surface and either a concave or convex image-side surface. Through the reasonable combination of lens shape and optical power, it has the advantages of high pixel count, infrared confocal, ultra-wide angle, and large aperture, realizing the performance requirements of large aperture and high pixel count, and further improving the imaging effect of the system. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0033] Figure 1 This is a schematic diagram of the structure of the optical system or camera module in Embodiment 1 of this application;

[0034] Figure 2 This is the distortion curve of the optical system or camera module in Embodiment 1 of this application;

[0035] Figure 3 This is the MTF curve of the optical system or camera module in the visible light band of Embodiment 1 of this application;

[0036] Figure 4 This is the MTF curve of the optical system or camera module in the infrared band of Embodiment 1 of this application;

[0037] Figure 5 This is a schematic diagram of the structure of the optical system or camera module in Embodiment 2 of this application;

[0038] Figure 6 This is the distortion curve of the optical system or camera module in Embodiment 2 of this application;

[0039] Figure 7 This is the MTF curve of the optical system or camera module in the visible light band of Embodiment 2 of this application;

[0040] Figure 8 This is the MTF curve of the optical system or camera module in the infrared band of Embodiment 2 of this application;

[0041] Figure 9 This is a schematic diagram of the structure of the optical system or camera module in Embodiment 3 of this application;

[0042] Figure 10 This is the distortion curve of the optical system or camera module in Embodiment 3 of this application;

[0043] Figure 11 This is the MTF curve of the optical system or camera module in the visible light band of Embodiment 3 of this application;

[0044] Figure 12 This is the MTF curve of the optical system or camera module in the infrared band of Embodiment 3 of this application. Detailed Implementation

[0045] This application provides a high-pixel confocal panoramic fisheye optical system, which consists of a first lens, a second lens, a third lens, a fourth lens, an aperture stop, a fifth lens, a sixth lens, and a seventh lens in sequence along the optical axis from the object plane to the image plane;

[0046] The first lens has negative optical power, its object side is convex, and its image side is concave.

[0047] The second lens has negative optical power, and its image-side surface is concave.

[0048] The third lens has negative optical power, its object side is concave, and its image side is convex.

[0049] The fourth lens has positive optical power and its object side is convex.

[0050] The fifth lens has positive optical power, and its object side is convex, and its image side is convex.

[0051] The sixth lens has negative optical power, its object side is concave, and its image side is either convex or concave.

[0052] The seventh lens has positive optical power, its object side is convex, and its image side is either convex or concave.

[0053] The optical system satisfies the following relationship: D1 / (Fno*Ymax)<2.0; where 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.

[0054] The optical system of the embodiment of the present application mainly consists of seven lenses. Through the reasonable combination of the lens shapes and optical powers, it has the advantages of high pixels, infrared confocal, ultra-wide angle, and large aperture, achieving the performance requirements of large aperture and high pixels, and further improving the imaging effect of the device equipped with this system.

[0055] Furthermore, the optical system satisfies the following conditions: 0.3 < |f12| / |f3| < 0.6, where f12 is the effective combined focal length of the first lens and the second lens, and f3 is the effective focal length of the third lens. By limiting the ratio range of the combined focal length of the first lens and the second lens and the focal length of the third lens, it not only ensures excellent image quality of the optical system but also ensures good processability of the system.

[0056] Furthermore, the optical system satisfies the following conditions: 0.4 < |f4| / |f56| < 0.6, where f4 is the effective focal length of the fourth lens, and f56 is the effective combined focal length of the fifth lens and the sixth lens. By limiting the ratio range of the focal length of the fourth lens and the combined focal length of the fifth lens and the sixth lens, it not only ensures excellent image quality of the optical system but also ensures good processability of the system.

[0057] Furthermore, the optical system satisfies the following conditions: 2.5 < f7 / f < 4.0, where f7 is the effective focal length of the seventh lens, and f is the effective focal length of the optical imaging system. By restricting the ratio of the optical power of the seventh lens to the effective focal length of the optical imaging system within a reasonable range, it can balance the remaining spherical aberration after balancing to balance the spherical aberration generated by the first six lenses, thereby finely adjusting and controlling the spherical aberration of the system, and strengthening the precise control of the axial field aberration.

[0058] Furthermore, the optical system satisfies the following conditions: -2.1 < f6 / f < -0.7, where f6 is the effective focal length of the sixth lens, and f is the effective focal length of the optical imaging system. By restricting the ratio of the optical power of the sixth lens to the effective focal length of the optical imaging system within a reasonable range, it can balance the remaining spherical aberration after balancing to balance the spherical aberration generated by the first five lenses, thereby finely adjusting and controlling the spherical aberration of the system, and strengthening the precise control of the axial field aberration.

[0059] Furthermore, the optical system satisfies the following conditions: 0.1 < (f3 + f4) / (f3 - f4) < 0.4, where f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, and f is the effective focal length of the optical imaging system. By limiting the effective focal lengths of the third lens and the fourth lens of the optical imaging system within a reasonable range, it can effectively restrict the contributions of the spherical aberration and coma of the third lens and the fourth lens, and make their sensitivity at a reasonable level after balancing.

[0060] Further, the optical system satisfies the following conditions: 2.5 < (f - f12) / f < 3.1, where f12 is the effective combined focal length of the first lens and the second lens, and f is the effective focal length of the optical system. The first lens provides negative refractive power to the optical system, and the sixth lens provides positive or negative refractive power to the optical system. By using two lenses with positive and negative refractive powers, it is beneficial to the mutual correction of aberrations. Exceeding the upper limit of the relational expression, the refractive power of the lens combination is too small, which is likely to cause large marginal aberrations and chromatic aberration, and is not conducive to improving the resolution performance; exceeding the lower limit of the relational expression, the overall refractive power of the first lens and the second lens is too strong, making the lens group prone to serious astigmatism, which is not conducive to improving the imaging quality.

[0061] Further, the optical system satisfies the following conditions: 0.1 < f123 / f234 < 0.4, where f123 is the effective combined focal length of the first lens, the second lens, and the third lens, and f234 is the effective combined focal length of the second lens, the third lens, and the fourth lens. Satisfying the above relational expression is beneficial to the transmission of large-angle light beams and their entry into the aperture stop, realizing the wide-angleization of the optical system and improving the brightness of the large-angle field of view image plane. Exceeding the upper limit of the relational expression, the refractive power of the front lens group is too strong, and serious astigmatism is likely to occur in the large-angle marginal field of view, reducing the marginal resolution; below the lower limit of the relational expression, the refractive power of the front lens group is insufficient, which is not conducive to the wide-angleization of the optical system.

[0062] Further, the optical system satisfies the following conditions: 1.3 < (R^6 - R^7) / R^7 < 1.5, where R^6 is the curvature radius of the object side surface of the third lens, and R^7 is the curvature radius of the image side surface of the third lens. By controlling the curvature radii of the object side surface and the image side surface of the third lens, the total deflection angles of the object side surface and the image side surface of the third lens at the marginal field of view can be reasonably controlled within a reasonable range, effectively reducing the sensitivity of the system.

[0063] Further, the optical system satisfies the following conditions: -1.2 < R^11 / R^15 + R^12 / R^14 < -0.4, where R^11 is the curvature radius of the object side surface of the fifth lens, R^12 is the curvature radius of the image side surface of the fifth lens, R^14 is the curvature radius of the object side surface of the seventh lens, and R^15 is the curvature radius of the image side surface of the seventh lens. By controlling the curvature radii of the object side and the image side of the fifth lens and the seventh lens within a reasonable range, the contributions of the astigmatism amounts on the object side and the image side surfaces can be effectively controlled, and then the image quality of the intermediate field of view and the aperture band can be effectively and reasonably controlled.

[0064] Embodiment 1

[0065] The following refers to Figures 1 to 4 Describe the optical imaging lens according to Embodiment 1 of the present application. Figure 1 The structural schematic diagram of the optical imaging lens according to Embodiment 1 of the present application is shown.

[0066] like Figure 1 As shown, the optical imaging lens according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, an infrared filter E8, and an imaging surface S16.

[0067] 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 concave and its image-side surface S6 being convex. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S10 being concave and its image-side surface S11 being concave. 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 filter E8 has an object-side surface S14 and an image-side surface S15. Light from the object passes sequentially through surfaces S1 to S15 and is finally imaged on the imaging surface S16.

[0068] Table 1 shows the surface type, radius of curvature, thickness, and material of each lens in the optical imaging lens of Example 1, wherein the units for radius of curvature and thickness are millimeters (mm).

[0069] Table 1

[0070]

[0071] In Table 1, the object-side surface and image-side surface of any one of the following lenses—E2, E3, E5, E6, and E7—are aspherical. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formulas:

[0072]

[0073] Where x is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the vertex of the aspherical surface, k is the conic coefficient, and Ai is the coefficient corresponding to the i-th higher-order term in the aspherical surface shape formula. Table 2 gives the conic coefficients and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 for each aspherical surface that can be used in the first embodiment.

[0074] Table 2

[0075]

[0076] Figure 2 The distortion curve of the optical imaging lens of Example 1 is shown. Distortion represents the magnitude of distortion at different image heights.

[0077] Figure 3 The MTF curve of the optical imaging lens of Example 1 in the visible light band is shown, which represents the MTF values ​​in the meridional and sagittal directions of different fields of view at different spatial frequencies.

[0078] Figure 4 The MTF curve of the optical imaging lens of Example 1 in the infrared band is shown, which represents the MTF values ​​in the meridional and sagittal directions of different fields of view at different spatial frequencies.

[0079] The optical imaging lens given in Example 1 can achieve good imaging quality.

[0080] Example 2

[0081] The following is for reference Figures 5 to 8 Describes an optical imaging lens according to Embodiment 2 of this application. Figure 4 A schematic diagram of the structure of an optical imaging lens according to Embodiment 2 of this application is shown.

[0082] like Figure 4 As shown, the optical imaging lens according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, an infrared filter E8, and an imaging surface S16.

[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 concave and its image-side surface S6 being convex. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S10 being concave 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 filter E8 has an object-side surface S14 and an image-side surface S15. Light from the object passes sequentially through surfaces S1 to S15 and is finally imaged onto the imaging surface S16.

[0084] Table 3 shows the surface type, radius of curvature, thickness, and material of each lens in the optical imaging lens of Example 2, wherein the units for radius of curvature and thickness are millimeters (mm).

[0085] Table 3

[0086]

[0087] In Table 3, the object-side surface and image-side surface of any one of the lenses from the second lens E2 to the sixth lens E6 are aspherical. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0088]

[0089] Where x is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the vertex of the aspherical surface, k is the conic coefficient, and Ai is the coefficient corresponding to the i-th higher-order term in the aspherical surface shape formula. Table 4 gives the conic coefficients and higher-order term coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for each aspherical surface in the first embodiment.

[0090] Table 4

[0091]

[0092] Figure 6 The distortion curve of the optical imaging lens of Example 2 is shown. Distortion represents the magnitude of distortion at different image heights.

[0093] Figure 7 The MTF curve of the optical imaging lens of Example 2 in the visible light band is shown, which represents the MTF values ​​in the meridional and sagittal directions of different fields of view at different spatial frequencies.

[0094] Figure 8 The MTF curve of the optical imaging lens of Example 2 in the infrared band is shown, which represents the MTF values ​​in the meridional and sagittal directions of different fields of view at different spatial frequencies.

[0095] The optical imaging lens given in Example 2 can achieve good imaging quality.

[0096] Example 3

[0097] The following is for reference Figures 9 to 12 Describes an optical imaging lens according to Embodiment 3 of this application. Figure 7 A schematic diagram of the structure of an optical imaging lens according to Embodiment 3 of this application is shown.

[0098] like Figure 7 As shown, the optical imaging lens according to an exemplary embodiment of this application includes, in sequence along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a STO, a fifth lens E5, a sixth lens E6, a seventh lens E7, an infrared filter E8, and an imaging surface S16.

[0099] 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 concave and its image-side surface S6 being convex. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S10 being concave 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 convex. The filter E8 has an object-side surface S14 and an image-side surface S15. Light from the object passes sequentially through surfaces S1 to S15 and is finally imaged onto the imaging surface S16.

[0100] Table 5 shows the surface type, radius of curvature, thickness, and material of each lens in the optical imaging lens of Example 3, wherein the units for radius of curvature and thickness are millimeters (mm).

[0101] Table 5

[0102]

[0103] In Table 5, the object-side surface and image-side surface of any one of the lenses from the second lens E2 to the sixth lens E6 are aspherical. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0104]

[0105] Where x is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the vertex of the aspherical surface, k is the conic coefficient, and Ai is the coefficient corresponding to the i-th higher-order term in the aspherical surface shape formula. Table 6 gives the conic coefficients and higher-order term coefficients A4, A6, A8, A10, A12, A14, and A16 for each aspherical surface that can be used in the first embodiment.

[0106] Table 6

[0107]

[0108] Figure 10 The distortion curve of the optical imaging lens of Example 3 is shown. Distortion represents the magnitude of distortion at different image heights.

[0109] Figure 11 The MTF curve of the optical imaging lens of Example 3 in the visible light band is shown. It represents the MTF values ​​in the meridional and sagittal directions of different fields of view at different spatial frequencies.

[0110] Figure 12 The MTF curve of the optical imaging lens of Example 3 in the infrared band is shown, which represents the MTF values ​​in the meridional and sagittal directions of different fields of view at different spatial frequencies.

[0111] The optical imaging lens given in Example 3 can achieve good imaging quality.

[0112] In Examples 1-3, the basic data is as follows:

[0113] Table 7

[0114]

[0115] In Examples 1-3, each conditional expression satisfies the conditions in the table below:

[0116] Table 8

[0117]

[0118] A camera module includes at least an optical lens, in which the aforementioned high-pixel confocal panoramic confocal fisheye optical system is installed. By rationally matching the shape and optical power of each lens, it has the advantages of high pixel count, infrared confocal, ultra-wide angle, and large aperture, thus achieving the performance requirements of large aperture and high pixel count, and further improving the imaging effect of the device equipped with the system.

[0119] The above description provides one or more embodiments in conjunction with specific content, and does not imply that the specific implementation of the present invention is limited to these descriptions. Any methods or structures that are similar to or identical to those of the present invention, or any technical deductions or substitutions made based on the concept of the present invention, should be considered within the scope of protection of the present invention.

Claims

1. A high-pixel confocal panoramic fisheye optical system, comprising, sequentially from the object plane to the image plane along the optical axis, a first lens, a second lens, a third lens, a fourth lens, an aperture stop, a fifth lens, a sixth lens, and a seventh lens, characterized in that: The first lens has negative optical power, its object side is convex, and its image side is concave. The second lens has negative optical power, and its image-side surface is concave. The third lens has negative optical power, its object side is concave, and its image side is convex. The fourth lens has positive optical power and its object side is convex. The fifth lens has positive optical power, and its object side is convex, and its image side is convex. The sixth lens has negative optical power, its object side is concave, and its image side is either convex or concave. The seventh lens has positive optical power, its object side is convex, and its image side is either convex or concave. The optical system satisfies the following relationship: 0.3 < |f12| / |f3| < 0.6; 0.4 < |f4| / |f56| < 0.6; 2.904 ≤ f7 / f < 4.0; -2.1 < f6 / f ≤ -3.625 / 2.26; Where f12 is the effective combined focal length of the first and second lenses, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f56 is the effective combined focal length of the fifth and sixth lenses, f7 is the effective focal length of the seventh lens, f is the effective focal length of the optical system, f6 is the effective focal length of the sixth lens, and f is the effective focal length of the optical system.

2. The high-pixel confocal panoramic fisheye optical system according to claim 1, characterized in that: The optical system satisfies the following relationship: 0.1 < (f3+f4) / (f3-f4) < 0.4; Where f3 is the effective focal length of the third lens and f4 is the effective focal length of the fourth lens.

3. The high-pixel confocal panoramic fisheye optical system according to claim 1, characterized in that: The optical system satisfies the following relationship: 2.5 < (f-f12) / f < 3.1; Where f is the effective focal length of the optical system, and f12 is the effective combined focal length of the first lens and the second lens.

4. The high-pixel confocal panoramic fisheye optical system according to claim 1, characterized in that: The optical system satisfies the following relationship: 1.3 < (R6+R7) / R7 < 1.5; -1.2 < R11 / R15+R12 / R14 < -0.4; Wherein, R6 is the radius of curvature of the object side of the third lens, R7 is the radius of curvature of the image side of the third lens, R11 is the radius of curvature of the object side of the fifth lens, R12 is the radius of curvature of the image side of the fifth lens, R14 is the radius of curvature of the object side of the seventh lens, and R15 is the radius of curvature of the image side of the seventh lens.

5. The high-pixel confocal panoramic fisheye optical system according to claim 1, characterized in that: The optical system satisfies the following relationship: D1 / (Fno*Ymax) < 2.0; Where 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.

6. A camera module, comprising at least an optical lens, characterized in that: The optical lens is equipped with the high-pixel confocal panoramic fisheye optical system as described in any one of claims 1-5.

Images