High-pixel confocal panoramic fisheye optical system and camera module applied by same

Abstract

The utility model provides a high-pixel confocal panoramic fisheye optical system and a camera module applying the same, the high-pixel confocal panoramic fisheye optical system is mainly composed of seven lenses, the first lens has negative focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens has negative focal power, and the image side surface of the second lens is a concave surface; the third lens has negative focal power, the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface; the fourth lens has positive focal power, and the object side surface of the fourth lens is a convex surface; the fifth lens has positive focal power, the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has negative focal power, the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a concave surface or a convex surface; the seventh lens has positive focal power, the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface or a convex surface; through reasonable matching of the lens shape and the focal power, the lens has the advantages of high pixel, infrared confocal, ultra-wide angle and large aperture, the performance requirements of large aperture and high pixel are met, and the imaging effect of equipment matched with the system is further improved.

Description

Technical Field

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

[0002] In recent years, with the gradual expansion of the application scope of panoramic VR / AR, the application scenarios of fisheye lenses have become more diverse; consumers have put forward higher and higher requirements for the resolution and portability of lenses; the existing lenses on the market generally have the defects of low pixels, small target surfaces of sensor chips, and low imaging clarity, and such lens designs are difficult to meet the increasing usage requirements of photography enthusiasts. Summary of the Utility Model

[0003] The present application aims to solve the defects of the existing fisheye lenses, such as low pixels, small target surfaces of sensor chips, and low imaging clarity, and provides a high-pixel confocal panoramic fisheye optical system, which has the advantages of high pixels and large wide angles. At the same time, the configuration of a large aperture can increase the light input of the optical system and higher imaging quality.

[0004] A high-pixel confocal panoramic fisheye optical system sequentially includes a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens, and a seventh lens along the optical axis from the object surface to the image surface;

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

[0006] The second lens has a negative focal power, and its image side is concave;

[0007] The third lens has a negative focal power, its object side is concave, and its image side is convex;

[0008] The fourth lens has a positive focal power, and its object side is convex;

[0009] The fifth lens has a positive focal power, its object side is convex, and its image side is convex;

[0010] The sixth lens has a negative focal power, its object side is concave, and its image side is convex or concave;

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

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

[0013] Wherein, 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.

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

[0015] Wherein, 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] Wherein, 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] Wherein, 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] Wherein, f is the effective focal length of the optical system, and f12 is the effective combined focal length of the first and second lenses.

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

[0024] Wherein, 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 surface of the third lens, R7 is the radius of curvature of the image side surface of the third lens, R11 is the radius of curvature of the object side surface of the fifth lens, R12 is the radius of curvature of the image side surface of the fifth lens, R14 is the radius of curvature of the object side surface of the seventh lens, and R15 is the radius of curvature of the image side surface of the seventh lens.

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

[0029] On the other hand, an embodiment of the present application further provides an imaging module, which at least includes an optical lens, and the above-mentioned high-pixel confocal panoramic fisheye optical system is installed in the optical lens.

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

[0031] The present utility model provides a high-pixel confocal panoramic fisheye optical system and an imaging module applying the same, which are mainly composed of seven lenses. The first lens has a negative optical power, its object side is convex, and its image side is concave; the second lens has a negative optical power, and its image side is concave; the third lens has a negative optical power, its object side is concave, and its image side is convex; the fourth lens has a positive optical power, and its object side is convex; the fifth lens has a positive optical power, its object side is convex, and its image side is convex; the sixth lens has a negative optical power, its object side is concave, and its image side is concave or convex; the seventh lens has a positive optical power, its object side is convex, and its image side is concave or convex; through the reasonable matching of the lens shapes and optical powers, it has the advantages of high pixels, infrared confocal, ultra-wide angle, and large aperture, realizes the performance requirements of large aperture and high pixels, and further improves the imaging effect of the equipment equipped with this system. Description of the Drawings

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments.

[0033] Figure 1 It is a schematic structural diagram of the optical system or imaging module of Embodiment 1 of the present application;

[0034] Figure 2 It is the distortion curve of the optical system or imaging module of Embodiment 1 of the present application;

[0035] Figure 3 It is the MTF curve of the optical system or imaging module of Embodiment 1 of the present application in the visible light band;

[0036] Figure 4 It is the MTF curve of the optical system or imaging module of Embodiment 1 of the present application in the infrared band;

[0037] Figure 5 It is a schematic structural diagram of the optical system or imaging module of Embodiment 2 of the present application;

[0038] Figure 6 It is the distortion curve of the optical system or imaging module of Embodiment 2 of the present application;

[0039] Figure 7 It is the MTF curve of the optical system or imaging module of Embodiment 2 of the present application in the visible light band;

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

[0041] Figure 9 It is a schematic structural diagram of the optical system or camera module in Embodiment 3 of the present application;

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

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

[0044] Figure 12 It is the MTF curve of the optical system or camera module in the infrared band in Embodiment 3 of the present application. Detailed implementation manners

[0045] The present application provides a high-pixel confocal panoramic fisheye optical system, which is composed of a first lens, a second lens, a third lens, a fourth lens, a diaphragm, 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 a negative optical power, its object side is convex, and its image side is concave;

[0047] The second lens has a negative optical power, and its image side is concave;

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

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

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

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

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

[0053] This 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] Further, the optical system satisfies the following condition: 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] Further, the optical system satisfies the following condition: 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] Further, the optical system satisfies the following condition: 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 constraining 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] Further, the optical system satisfies the following condition: -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 constraining 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] Further, the optical system satisfies the following condition: 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 constrain 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 condition: 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 for the optical system, and the sixth lens provides positive or negative refractive power for 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 relationship, the refractive power of the lens combination is too small, which is likely to generate large marginal aberrations and chromatic aberration, and is not conducive to improving the resolution performance; exceeding the lower limit of the relationship, 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 the improvement of imaging quality.

[0061] Further, the optical system satisfies the following condition: 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 relationship is beneficial to the transmission and incidence of large-angle light beams into the aperture stop, realizing the wide-angleization of the optical system, and is beneficial to the improvement of the image plane brightness of the large-angle field of view. Exceeding the upper limit of the relationship, 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 relationship, 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 condition: 1.3 < (R6 - R7) / R7 < 1.5, where R6 is the curvature radius of the object side surface of the third lens, and R7 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, and the sensitivity of the system can be effectively reduced.

[0063] Further, the optical system satisfies the following condition: -1.2 < R11 / R15 + R12 / R14 < -0.4, where R11 is the curvature radius of the object side surface of the fifth lens, R12 is the curvature radius of the image side surface of the fifth lens, R14 is the curvature radius of the object side surface of the seventh lens, and R15 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 further, the image quality of the middle field of view and the aperture band can be 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 Fig. shows a schematic structural diagram of the optical imaging lens according to Embodiment 1 of the present application.

[0066] As shown Figure 1 in the figure, the optical imaging lens according to an exemplary embodiment of the present application sequentially includes, 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 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 a negative focal power, its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has a negative focal power, its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has a negative focal power, its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has a positive focal power, its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has a positive focal power, its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has a negative focal power, its object side surface S10 is concave, and its image side surface S11 is concave. The seventh lens E7 has a positive focal power, its object side surface S12 is convex, and its image side surface S13 is convex. The filter E8 has an object side surface S14 and an image side surface S15. Light from the object sequentially passes through the surfaces S1 to S15 and finally forms an image on the imaging surface S16.

[0068] Table 1 shows the surface types, radii of curvature, thicknesses, and materials of the lenses of the optical imaging lens of Example 1, where the units of the radius of curvature and the thickness are both millimeters (mm).

[0069] Table 1

[0070]

[0071] In Table 1, for any one of the second lens E2, the third lens E3, the fifth lens E5, the sixth lens E6, and the seventh lens E7, both the object side surface and the image side surface are aspherical surfaces. The surface profiles of the aspherical lenses can be defined by, but are not limited to, the following aspherical formula:

[0072]

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

[0074] Table 2

[0075]

[0076] Figure 2 The distortion curve of the optical imaging lens of Embodiment 1 is shown. Distortion represents the distortion magnitude values corresponding to different image heights.

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

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

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

[0080] Embodiment Two

[0081] The following refers to Figures 5 to 8 Describe the optical imaging lens according to Embodiment 2 of the present application. Figure 4 The structural schematic diagram of the optical imaging lens according to Embodiment 2 of the present application is shown.

[0082] As Figure 4 shown, the optical imaging lens according to the exemplary embodiment of the present application sequentially includes, 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 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 a negative optical power, its object surface S1 is convex, and its image surface S2 is concave. The second lens E2 has a negative optical power, its object surface S3 is convex, and its image surface S4 is concave. The third lens E3 has a negative optical power, its object surface S5 is concave, and its image surface S6 is convex. The fourth lens E4 has a positive optical power, its object surface S7 is convex, and its image surface S8 is concave. The fifth lens E5 has a positive optical power, its object surface S9 is convex, and its image surface S10 is convex. The sixth lens E6 has a negative optical power, its object surface S10 is concave, and its image surface S11 is convex. The seventh lens E7 has a positive optical power, its object surface S12 is convex, and its image surface S13 is concave. The filter E8 has an object surface S14 and an image surface S15. Light from the object sequentially passes through each surface S1 to S15 and finally forms an image on the imaging surface S16.

[0084] Table 3 shows the surface types, curvature radii, thicknesses, and materials of the lenses of the optical imaging lens of Embodiment 2, where the units of the curvature radii and thicknesses are both millimeters (mm).

[0085] Table 3

[0086]

[0087] In Table 3, for any one of the second lens E2 to the sixth lens E6, both the object side surface and the image side surface are aspherical surfaces. The surface profiles of the respective aspherical lenses can be defined by, but are not limited to, the following aspherical formula:

[0088]

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

[0090] Table 4

[0091]

[0092] Figure 6 Shows the distortion curve of the optical imaging lens of Embodiment 2. Distortion represents the distortion magnitude values corresponding to different image heights.

[0093] Figure 7 Shows the MTF curve of the optical imaging lens of Embodiment 2 in the visible light band, which represents the MTF values in the meridional direction and the sagittal direction of different fields of view at different spatial frequencies.

[0094] Figure 8 Shows the MTF curve of the optical imaging lens of Embodiment 2 in the infrared band, which represents the MTF values in the meridional direction and the sagittal direction of different fields of view at different spatial frequencies.

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

[0096] Embodiment Three

[0097] The following refers to Figures 9 to 12 Describe the optical imaging lens according to Embodiment 3 of the present application. Figure 7 Shows a schematic structural diagram of the optical imaging lens according to Embodiment 3 of the present application.

[0098] As Figure 7 shown, the optical imaging lens according to the exemplary embodiment of the present application sequentially includes, 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 a negative focal power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has a negative focal power, its object side S3 is convex, and its image side S4 is concave. The third lens E3 has a negative focal power, its object side S5 is concave, and its image side S6 is convex. The fourth lens E4 has a positive focal power, its object side S7 is convex, and its image side S8 is concave. The fifth lens E5 has a positive focal power, its object side S9 is convex, and its image side S10 is convex. The sixth lens E6 has a negative focal power, its object side S10 is concave, and its image side S11 is concave. The seventh lens E7 has a positive focal power, its object side S12 is convex, and its image side S13 is convex. The filter E8 has an object side S14 and an image side S15. Light from the object sequentially passes through the surfaces S1 to S15 and finally forms an image on the imaging surface S16.

[0100] Table 5 shows the surface types, radii of curvature, thicknesses, and materials of the lenses of the optical imaging lens of Example 3, where the units of the radii of curvature and thicknesses are both millimeters (mm).

[0101] Table 5

[0102]

[0103] In Table 5, the object side and the image side of any one of the second lens E2 to the sixth lens E6 are both aspherical surfaces, and the surface profiles of the aspherical lenses can be defined by, but are 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 surface vertex, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the aspherical vertex, k is the conic coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface profile formula. Table 6 gives the conic coefficients and the high-order term coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical surfaces that can be used in the first embodiment.

[0106] Table 6

[0107]

[0108] Figure 10 shows the distortion curve of the optical imaging lens of Example 3. Distortion represents the distortion magnitude values corresponding to different image heights.

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

[0110] Figure 12 Shows the MTF curve of the optical imaging lens in Example 3 in the infrared band, which represents the MTF values in the meridional direction and sagittal direction 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 formula satisfies the conditions in the following table:

[0116] Table 8

[0117]

[0118] A camera module includes at least an optical lens, and the above-mentioned high-pixel confocal panoramic fisheye optical system is installed in the optical lens. By reasonably matching the shapes and optical powers of each lens, it has the advantages of high pixels, infrared confocal, ultra-wide angle, and large aperture, realizes the performance requirements of large aperture and high pixels, and further improves the imaging effect of the equipment equipped with this system.

[0119] As described above, one or more implementation manners are provided in combination with specific contents, and it is not determined that the specific implementation of the present invention is only limited to these descriptions. Any approximation or similarity to the method, structure, etc. of the present invention, or any technical deduction or substitution made under the premise of the concept of the present invention, should be regarded as the protection scope of the present invention.

Claims

1. A high-pixel confocal panoramic fisheye optical system, comprising a first lens, a second lens, a third lens, a fourth lens, an aperture, a fifth lens, a sixth lens, and a seventh lens in sequence from the object plane to the image plane along the optical axis, characterized in that: 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 third lens has negative optical power, its object side surface is concave, and its image side surface is convex; The fourth lens has positive optical power, and its object side surface is convex; The fifth lens has positive refractive power, its object side surface is convex, and its image side surface is convex; The sixth lens has negative optical power, its object side surface is concave, and its image side surface is convex or concave; The seventh lens has positive refractive power, its object side surface is convex, and its image side surface is convex or concave.

2. The high-pixel confocal panoramic fisheye optical system according to claim 1, characterized in that: The optical system satisfies the following relationship: 0.3 < |f12| / |f3| < 0.6; Wherein, 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.

3. The high-pixel confocal panoramic fisheye optical system according to claim 1, characterized in that: The optical system satisfies the following relationship: 0.4 < |f4| / |f56| < 0.6; Among them, 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.

4. The high-pixel confocal panoramic fisheye optical system according to claim 1, characterized in that: The optical system satisfies the following relationship: 2.5 < f7 / f < 4.0; and / or -2.1 < f6 / f < -0.7; Wherein, 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.

5. 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; Among them, f3 is the effective focal length of the third lens, and f4 is the effective focal length of the fourth lens.

6. 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; Wherein, 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.

7. The high-pixel confocal panoramic fisheye optical system according to claim 1, characterized in that: The optical system satisfies the following relationship: 0.1 < f123 / f234 < 0.4; Wherein, 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.

8. 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; and / or -1.2 < R11 / R15+R12 / R14 < -0.4; Among them, R6 is the curvature radius of the object side of the third lens, R7 is the curvature radius of the image side of the third lens, R11 is the curvature radius of the object side of the fifth lens, R12 is the curvature radius of the image side of the fifth lens, R14 is the curvature radius of the object side of the seventh lens, and R15 is the curvature radius of the image side of the seventh lens.

9. 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; 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.

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

Images