Panoramic optical lens

Abstract

The invention provides a panoramic optical lens. The panoramic optical lens is sequentially composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens from an object side surface to an image surface, the first lens, the second lens, the third lens and the fourth lens form a front-end lens group; the fifth lens, the sixth lens, the seventh lens, the eighth lens and the ninth lens form a rear-end lens group; the first lens has negative focal power, the second lens has negative focal power, the third lens has negative focal power or positive focal power, the fourth lens has positive focal power, the fifth lens has positive focal power, the sixth lens has negative focal power, the seventh lens has positive focal power, and the eighth lens has negative focal power. The ninth lens has negative focal power or positive focal power; the following conditional expressions are satisfied: 0.1 lt; fg1 / fg2lt; 3.5,-25 lt; f3 / f4lt; 10,-2lt; f5 / f6lt; 0, 5 mmlt; f2 / Nd2lt; 2 mm, 1 mlt; f4 / Nd4lt; 5 mm, Vd2-Vd4gt; 10. Under the ultra-wide angle condition, the ultra-wide angle lens has the characteristics of small color difference and high resolution.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical lenses, in particular to a panoramic optical lens. BACKGROUND

[0002] With the rapid development of the self-media and Internet industries, photography has become an important way for people to record life and share experiences. Various types of photography equipment are widely used in various scenarios, such as micro-single cameras for shooting landscapes and portraits, action cameras for recording cycling or travel processes, and aerial cameras mounted on drones. Among them, panoramic cameras gradually popularize in consumer and professional applications due to their ability to capture a wide range of angles.

[0003] However, the mainstream panoramic cameras currently available generally have a significant decrease in resolution and a serious chromatic aberration problem when achieving a wide-angle imaging with a field of view angle greater than 180°. These optical defects result in insufficient imaging clarity, obvious edge distortion, and poor color reproduction, which not only greatly increases the complexity and cost of image and video post-processing, but also seriously affects the user's shooting experience and product quality, limiting the further application of panoramic cameras in high-quality visual recording and creation fields.

[0004] Therefore, the industry urgently needs a panoramic lens that can simultaneously achieve high resolution and low chromatic aberration under ultra-wide-angle conditions to overcome the inherent defects in the prior art, improve imaging quality and user satisfaction, and meet the growing demand for high-standard images. SUMMARY

[0005] To solve the above problems, the present application provides a panoramic optical lens with the characteristics of small chromatic aberration and high resolution under ultra-wide-angle conditions.

[0006] To achieve the above purpose, the present application solves the problem by the following technical scheme:

[0007] A panoramic optical lens, from the object side to the image plane, is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens. A stop is arranged between the fourth lens and the fifth lens. The first lens, the second lens, the third lens, and the fourth lens form a front lens group. The fifth lens, the sixth lens, the seventh lens, the eighth lens, and the ninth lens form a rear lens group.

[0008] The first lens has a negative focal power, the second lens has a negative focal power, the third lens has a negative focal power or a positive focal power, the fourth lens has a positive focal power, the fifth lens has a positive focal power, the sixth lens has a negative focal power, the seventh lens has a positive focal power, the eighth lens has a negative focal power, and the ninth lens has a negative focal power or a positive focal power.

[0009] which satisfies the following conditional expression:

[0010] 0.1 < fg1 / fg2 < 3.5, wherein fg1 represents the combined focal length of the front lens group, and fg2 represents the combined focal length of the rear lens group;

[0011] -25 < f3 / f4 < 10, wherein f3 represents the effective focal length of the third lens, and f4 represents the effective focal length of the fourth lens,

[0012] -2 < f5 / f6 < 0, wherein f5 represents the effective focal length of the fifth lens, and f6 represents the effective focal length of the sixth lens;

[0013] -5 mm < f2 / Nd2 < -2 mm, wherein f2 represents the effective focal length of the second lens, and Nd2 represents the refractive index of the second lens;

[0014] 1 mm < f4 / Nd4 < 5 mm, wherein f4 represents the effective focal length of the fourth lens, and Nd4 represents the refractive index of the fourth lens;

[0015] |Vd2-Vd4| > 10, wherein Vd2 represents the material Abbe number of the second lens, and Vd4 represents the material Abbe number of the fourth lens.

[0016] Preferably, it satisfies the following conditional expression 2.0 < Lg1 / Lg2 < 3.5, wherein Lg1 represents the total length of the front lens group, and Lg2 represents the total length of the rear lens group, and the group total length is defined as the distance from the first lens object-side vertex to the last lens image-side vertex of the group;

[0017] 0.5 < D11 / TTL < 1.5, wherein D11 represents the effective optical aperture of the first lens object-side surface, and TTL represents the total optical length of the panoramic optical lens.

[0018] Preferably, it satisfies the conditional expression 1.0 mm / rad < IH / FOV < 3.5 mm / rad, wherein IH represents the image height corresponding to the panoramic optical lens at the full field of view of 200°, FOV corresponds to the half field of view, and rad represents the unit of radian.

[0019] Preferably, -20 < (R12-R21) / CT12 < 60, wherein R12 represents the radius of curvature corresponding to the first lens image-side surface, R21 represents the radius of curvature corresponding to the second lens object-side surface, and CT12 represents the air gap of the first lens and the second lens on the optical axis;

[0020] |ΔIH_90 / ΔCT12|<0.2, |Δfocus / ΔCT12|<0.06, wherein ΔIH_90 represents the image height change of the fisheye optical lens when the field of view is 90 degrees corresponding to the air gap change ΔCT12 of the first lens and the second lens, Δfocus represents the best imaging plane position change of the fisheye optical lens when the field of view is 90 degrees corresponding to the air gap change value ΔCT12 of the first lens and the second lens, and ΔCT12 represents the air gap change of the first lens and the second lens on the optical axis of the fisheye optical lens.

[0021] Preferably, ΔCT12=0.08mm.

[0022] Preferably, it satisfies the condition formula -0.2° / mm<θ82 / R82<0.5° / mm, 0.2° / mm<θ91 / R91<5.0° / mm, 5.0° / mm<θ92 / R92<25.0° / mm, wherein θ82 represents the angle between the normal line at the maximum optical aperture of the image side surface of the eighth lens and the optical axis, θ91 represents the angle between the normal line at the maximum optical aperture of the object side surface of the ninth lens and the optical axis, θ92 represents the angle between the normal line at the maximum optical aperture of the image side surface of the ninth lens and the optical axis, R82 represents the curvature radius of the image side surface of the eighth lens, R91 represents the curvature radius of the object side surface of the ninth lens, and R92 represents the curvature radius of the image side surface of the ninth lens.

[0023] Preferably, the image side surface and the object side surface of the seventh lens, the eighth lens, and the ninth lens are all arranged as aspheric surfaces, and there is at least one inflection point on the surface profile curve from the center to the edge of the image side surface and the object side surface of the seventh lens, the eighth lens, and the ninth lens.

[0024] The beneficial effects of the present application are:

[0025] 1. Satisfying the condition formula -5mm<f2 / Nd2<-2mm, 1mm<f4 / Nd4<5mm, |Vd2-Vd4|>10, the purpose of small chromatic aberration in the full field of view of the fisheye optical lens can be achieved;

[0026] 2. Satisfying the condition formula 2.0<Lg1 / Lg2<3.5, 0.5<D11 / TTL<1.5, the purpose of miniaturization and light weight of the lens is achieved;

[0027] 3. The image side surface and the object side surface of the seventh lens, the eighth lens, and the ninth lens are all arranged as aspheric surfaces, and there is at least one inflection point on the surface profile curve from the center to the edge of the image side surface and the object side surface of the seventh lens, the eighth lens, and the ninth lens, which can guarantee excellent edge imaging quality;

[0028] 4. The condition formula -20 < (R12-R21) / CT12 < 60, |ΔIH_90 / ΔCT12| < 0.2, |Δfocus / ΔCT12| < 0.06 is met, which can ensure that the first lens of the panoramic optical lens has small tolerance sensitivity, so that the first lens can be separately disassembled in production and use;

[0029] 5. The condition formula -0.2° / mm < θ82 / R82 < 0.5° / mm, 0.2° / mm < θ91 / R91 < 5.0° / mm, 5.0° / mm < θ92 / R92 < 25.0° / mm is met, which can effectively eliminate / reduce ghost or ghost energy when the lens has a large field of view. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a cross-sectional structure schematic diagram of the first embodiment of the present application.

[0031] Figure 2 It is an optical transfer function curve diagram of the panoramic imaging lens in the first embodiment of the present application.

[0032] Figure 3 It is a Ray fun diagram of the panoramic imaging lens in the first embodiment of the present application.

[0033] Figure 4 It is a cross-sectional structure schematic diagram of the second embodiment of the present application.

[0034] Figure 5 It is an optical transfer function curve diagram of the panoramic imaging lens in the second embodiment of the present application.

[0035] Figure 6 It is a Ray fun diagram of the panoramic imaging lens in the second embodiment of the present application.

[0036] Figure 7 It is a cross-sectional structure schematic diagram of the third embodiment of the present application.

[0037] Figure 8 It is an optical transfer function curve diagram of the panoramic imaging lens in the third embodiment of the present application.

[0038] Figure 9 It is a Ray fun diagram of the panoramic imaging lens in the third embodiment of the present application.

[0039] The reference signs are: image plane 110, first lens 11, second lens 12, third lens 13, fourth lens 14, fifth lens 15, sixth lens 16, seventh lens 17, eighth lens 18, ninth lens 19 group, diaphragm 10. DETAILED DESCRIPTION

[0040] For the purposes of promoting an understanding of the principles of the application, reference will now be made to the embodiments illustrated in the drawings. The embodiments shown are intended to be illustrative only and not limiting of the present application. The present application will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for describing particular embodiments only and is not intended to be limiting of the application. The use herein of the terms "and / or" includes a set of one or more associated listed items.

[0042] In the present embodiment, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region. If the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is referred to as the object side surface of the lens, and the surface of each lens closest to the imaging surface is referred to as the image side surface of the lens.

[0043] The present application provides a panoramic optical lens, which comprises, from the object side to the image side 110, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, a seventh lens 17, an eighth lens 18, and a ninth lens 19. A diaphragm 10 is arranged between the fourth lens 14 and the fifth lens 15. The first lens 11, the second lens 12, the third lens 13, and the fourth lens 14 form a front lens group, and the fifth lens 15, the sixth lens 16, the seventh lens 17, the eighth lens 18, and the ninth lens 19 form a rear lens group.

[0044] The first lens 11 has a negative focal power, the second lens 12 has a negative focal power, the third lens 13 has a negative focal power or a positive focal power, the fourth lens 14 has a positive focal power, the fifth lens 15 has a positive focal power, the sixth lens 16 has a negative focal power, the seventh lens 17 has a positive focal power, the eighth lens 18 has a negative focal power, and the ninth lens 19 has a negative focal power or a positive focal power.

[0045] It satisfies the following conditional expression:

[0046] 0.1 < fg1 / fg2 < 3.5, wherein fg1 represents the combined focal length of the front lens group, and fg2 represents the combined focal length of the rear lens group.

[0047] -25 < f3 / f4 < 10, wherein f3 represents the effective focal length of the third lens 13, and f4 represents the effective focal length of the fourth lens 14,

[0048] -2 < f5 / f6 < 0, wherein f5 represents the effective focal length of the fifth lens 15, and f6 represents the effective focal length of the sixth lens 16;

[0049] -5 mm < f2 / Nd2 < -2 mm, wherein f2 represents the effective focal length of the second lens 12, and Nd2 represents the refractive index of the second lens 12;

[0050] 1 mm < f4 / Nd4 < 5 mm, wherein f4 represents the effective focal length of the fourth lens 14, and Nd4 represents the refractive index of the fourth lens 14;

[0051] |Vd2-Vd4| > 10, wherein Vd2 represents the material Abbe number of the second lens 12, and Vd4 represents the material Abbe number of the fourth lens 14. Satisfying the above conditional expressions can achieve the purpose of small chromatic aberration in the full field of view of the panoramic optical lens;

[0052] It satisfies the following conditional expression 2.0 < Lg1 / Lg2 < 3.5, wherein Lg1 represents the total length of the front lens group, Lg2 represents the total length of the rear lens group, the group total length is defined as the distance from the first lens vertex on the object side to the last lens vertex on the image side; 0.5 < D11 / TTL < 1.5, wherein D11 represents the effective optical aperture of the object side surface of the first lens 11, and TTL represents the total optical length of the panoramic optical lens. Satisfying the above conditional expressions can achieve the purpose of miniaturization and light weight of the lens.

[0053] It satisfies the conditional expression 1.0 mm / rad < IH / FOV < 3.5 mm / rad, wherein IH represents the image height corresponding to the full field angle 200° of the panoramic optical lens, FOV corresponds to the half field angle, and rad represents the unit of radian.

[0054] It satisfies the conditional expression -20 < (R12-R21) / CT12 < 60, wherein R12 represents the curvature radius corresponding to the image side surface of the first lens 11, R21 represents the curvature radius corresponding to the object side surface of the second lens 12, and CT12 represents the air gap of the first lens 11 and the second lens 12 on the optical axis;

[0055] |ΔIH_90 / ΔCT12|<0.2, |Δfocus / ΔCT12|<0.06, wherein ΔIH_90 represents the image height change of the fisheye optical lens when the field of view is 90 degrees, the first lens 11 and the second lens 12 have an air gap change ΔCT12, Δfocus represents the change of the best imaging plane position of the fisheye optical lens when the field of view is 90 degrees, the first lens 11 and the second lens 12 have an air gap change value ΔCT12, and ΔCT12 represents the air gap change of the first lens 11 and the second lens 12 on the optical axis of the fisheye optical lens. In the embodiment, ΔCT12=0.08mm. Satisfying the above conditional formula can ensure that the first lens of the fisheye optical lens has a very small tolerance sensitivity, so that the first lens can be used in a separate detachable scheme in production and use.

[0056] It satisfies the conditional formula -0.2° / mm<θ82 / R82<0.5° / mm, 0.2° / mm<θ91 / R91<5.0° / mm, 5.0° / mm<θ92 / R92<25.0° / mm, wherein θ82 represents the angle between the normal at the maximum optical aperture of the image side surface of the eighth lens 18 and the optical axis, θ91 represents the angle between the normal at the maximum optical aperture of the object side surface of the ninth lens 19 and the optical axis, θ92 represents the angle between the normal at the maximum optical aperture of the image side surface of the ninth lens 19 and the optical axis, R82 represents the curvature radius of the image side surface of the eighth lens 18, R91 represents the curvature radius of the object side surface of the ninth lens 19, and R92 represents the curvature radius of the image side surface of the ninth lens 19. Satisfying the above conditional formula can effectively eliminate / reduce ghost or ghost energy when the lens has a large field of view.

[0057] The image side and object side surfaces of the seventh lens 17, the eighth lens 18, and the ninth lens 19 are all set as aspheric surfaces, and there is at least one inflection point on the surface profile curve from the center to the edge of the image side and object side surfaces of the seventh lens 17, the eighth lens 18, and the ninth lens 19. This surface feature can ensure excellent edge imaging quality.

[0058] First embodiment, please refer to Figures 1-3In the first embodiment of the present application, a panoramic optical lens is provided, the first lens 11 has negative focal power, and the center of the object side is convex, and the center of the image side is concave; the second lens 12 has negative focal power, and the center of the object side is concave, and the center of the image side is concave; the third lens 13 has positive focal power, and the center of the object side is convex, and the center of the image side is concave; the fourth lens 14 has positive focal power, and the center of the object side is convex, and the center of the image side is convex; the fifth lens 15 has positive focal power, and the center of the object side is convex, and the center of the image side is convex; the sixth lens 16 has negative focal power, and the center of the object side is concave, and the center of the image side is concave; the seventh lens 17 has positive focal power, and the center of the object side is convex, and the center of the image side is convex; the eighth lens 18 has negative focal power, and the center of the object side is concave, and the center of the image side is convex; the ninth lens 19 has negative focal power, and the center of the object side is convex, and the center of the image side is concave. The ninth lens 19 is provided with a flat glass on the side close to the image plane.

[0059] The related parameters of each lens in the embodiment are shown in Table 1-1, and the parameters of the aspheric surface of each lens in the embodiment are shown in Table 1-2.

[0060] Table 1-1

[0061]

[0062] Table 1-2

[0063]

[0064] The aspheric surfaces satisfy the following equation:

[0065]

[0066] Wherein: z represents the distance of the curved surface from the curved surface vertex in the direction of the optical axis, C represents the curvature of the curved surface vertex, K represents the quadratic surface coefficient, h represents the distance of the optical axis to the curved surface, B, C, D, E, F, G, H respectively represent the fourth order, sixth order, eighth order, tenth order, twelfth order, fourteenth order, sixteenth order curved surface coefficients. The aspheric surfaces in the following embodiments are all according to this formula.

[0067] In the first embodiment, the system focal length f = 1.963 mm, FNO = 2.0, the total field angle is 100 degrees, the total length of the system TOTR = 16.501 mm, and Table 1-3 is the conditional calculation result.

[0068] Table 1-3

[0069] Condition Actual Result 0.1 < fg1 / fg2 < 3.5 0.216 Complied -25 < f3 / f4 < 10 6.885 Complied -2 < f5 / f6 < 0 -1.339 Complied -5 < f2 / Nd2< -2 -4.128 Complied 1 < f4 / Nd4 < 5 2.047 Complied |Vd2-Vd4| > 10 24.157 Complied 2.0 < Lg1 / Lg2 < 3.5 3.192 Complied 0.5 < D11 / TTL < 1.5 1.091 Complied 1.0 < IH / FOV < 3.5 1.800 Complied -20 < (R12-R21) / CT12 < 60 56.963 Complied |ΔIH_90 / ΔCT12| < 0.2 0.150 Complied |Δfocus / ΔCT12| < 0.06 0.049 Complied -0.2 < 0 82 / R 82 < 0.5 -0.085 Complied 0.2 < θ91 / R91 < 5.0 3.644 Complied 5.0 < θ92 / R92 < 25.0 13.084 Complied

[0070] In the second embodiment, please refer to Figures 4-6The second embodiment of the present application provides a panoramic optical lens. The lens structure of the second embodiment is substantially the same as that of the first embodiment, but the first lens 11 has negative focal power, the center of the object side surface is convex, and the center of the image side surface is concave; the second lens 12 has negative focal power, the center of the object side surface is convex, and the center of the image side surface is concave; the third lens 13 has negative focal power, the center of the object side surface is convex, and the center of the image side surface is concave; the fourth lens 14 has positive focal power, the center of the object side surface is convex, and the center of the image side surface is convex; the fifth lens 15 has positive focal power, the center of the object side surface is convex, and the center of the image side surface is convex; the sixth lens 16 has negative focal power, the center of the object side surface is convex, and the center of the image side surface is concave; the seventh lens 17 has positive focal power, the center of the object side surface is convex, and the center of the image side surface is convex; the eighth lens 18 has negative focal power, the center of the object side surface is concave, and the center of the image side surface is concave; and the ninth lens 19 has negative focal power, the center of the object side surface is convex, and the center of the image side surface is concave. The ninth lens 19 is provided with a flat glass on the side close to the image surface. The related parameters of each lens in the second embodiment are shown in Table 2-1, and the aspheric parameters of each lens in the second embodiment are shown in Table 2-2.

[0071] Table 2-1

[0072]

[0073] Table 2-2

[0074]

[0075]

[0076] The aspheric surfaces satisfy the following equation:

[0077]

[0078] Wherein, z represents the distance of the surface from the surface vertex in the direction of the optical axis, C represents the curvature of the surface vertex, K represents the quadratic surface coefficient, h represents the distance of the optical axis to the surface, B, C, D, E, F, G, and H represent the fourth-order, sixth-order, eighth-order, tenth-order, twelfth-order, fourteenth-order, and sixteenth-order surface coefficients, respectively. The aspheric surfaces in the following embodiments are all according to this formula.

[0079] In the second embodiment, the system focal length f = 2.650 mm, the FNO = 2.1, the total field angle is 100 degrees, and the total length of the system TOTR = 20.0 mm. Table 2-3 is the conditional calculation result.

[0080] Table 2-3

[0081] Condition Actual Result 0.1 < fg1 / fg2 < 3.5 1.124 Complied -25 < f3 / f4 < 10 -23.335 Complied -2 < f5 / f6 < 0 -0.612 Complied -5 < f2 / Nd2< -2 -4.826 Complied 1 < f4 / Nd4 < 5 3.215 Complied |Vd2-Vd4| > 10 10.232 Complied 2.0 < Lg1 / Lg2 < 3.5 2.418 Complied 0.5 < D11 / TTL < 1.5 0.975 Complied 1.0 < IH / FOV < 3.5 2.684 Complied -20 < (R12-R21) / CT12 < 60 -7.818 Complied | ΔIH 90 / ΔCT 12 | < 0.2 0.142 Complied |Δfocus / ΔCT12| < 0.06 0.053 Complied -0.2 < 0 82 / R 82 < 0.5 0.456 Complied 0.2 < θ91 / R91 < 5.0 0.598 Complied 5.0 < θ92 / R92 < 25.0 7.649 Complied

[0082] In the third embodiment, please refer toFigures 7-9 The third embodiment of the present application provides a panoramic optical lens. The lens structure of the embodiment is substantially the same as that of the first embodiment, except that the first lens 11 has a negative focal power, and the center of the object side is convex and the center of the image side is concave; the second lens 12 has a negative focal power, and the center of the object side is concave and the center of the image side is concave; the third lens 13 has a negative focal power, and the center of the object side is convex and the center of the image side is concave; the fourth lens 14 has a positive focal power, and the center of the object side is convex and the center of the image side is convex; the fifth lens 15 has a positive focal power, and the center of the object side is convex and the center of the image side is convex; the sixth lens 16 has a negative focal power, and the center of the object side is concave and the center of the image side is concave; the seventh lens 17 has a positive focal power, and the center of the object side is convex and the center of the image side is convex; the eighth lens 18 has a negative focal power, and the center of the object side is concave and the center of the image side is convex; and the ninth lens 19 has a positive focal power, and the center of the object side is convex and the center of the image side is concave. The ninth lens 19 is provided with a flat glass on the side close to the image plane. The related parameters of each lens are shown in Table 3-1, and the aspheric parameters of each lens of the embodiment are shown in Table 3-2.

[0083] Table 3-1

[0084]

[0085] Table 3-2

[0086]

[0087]

[0088] The aspheres satisfy the following equation:

[0089]

[0090] Wherein z represents the distance of the curve from the curve vertex in the direction of the optical axis, C represents the curvature of the curve vertex, K represents the quadratic curve coefficient, h represents the distance of the optical axis to the curve, B, C, D, E, F, G, H respectively represent the fourth order, sixth order, eighth order, tenth order, twelfth order, fourteenth order, sixteenth order curve coefficients. The aspheres of the following embodiments are in accordance with this formula.

[0091] In the third embodiment, the system focal length f = 1.346 mm, FNO = 2.0, the total field angle is 100 degrees, and the total length of the system TOTR = 13.929 mm. Table 3-3 is the conditional calculation result.

[0092] Table 3-3

[0093] Condition Actual Result 0.1 < fg1 / fg2 < 3.5 2.973 Complied -25 < f3 / f4 < 10 -1.862 Complied -2 < f5 / f6 < 0 -0.751 Complied -5 < f2 / Nd2< -2 -3.753 Complied 1 < f4 / Nd4 < 5 1.601 Complied |Vd2-Vd4| > 10 24.143 Complied 2.0 < Lg1 / Lg2 < 3.5 2.709 Complied 0.5 < D11 / TTL < 1.5 1.149 Complied 1.0 < IH / FOV < 3.5 1.320 Complied -20 < (R12-R21) / CT12 < 60 5.690 Complied |ΔIH_90 / ΔCT12| < 0.2 0.161 Complied |Δfocus / ΔCT12| < 0.06 0.053 Complied -0.2 < 0 82 / R 82 < 0.5 0.173 Complied 0.2 < θ91 / R91 < 5.0 2.337 Complied 5.0 < θ92 / R92 < 25.0 19.288 Complied

[0094] The above embodiments only express three kinds of implementation manners of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A panoramic optical lens characterized in that: From the object side to the image side (110) are sequentially composed of a first lens (11), a second lens (12), a third lens (13), a fourth lens (14), a fifth lens (15), a sixth lens (16), a seventh lens (17), an eighth lens (18), a ninth lens (19), the diaphragm (10) is correspondingly arranged between the fourth lens (14) and the fifth lens (15); the first lens (11), the second lens (12), the third lens (13), the fourth lens (14) constitute a front end lens group; the fifth lens (15), the sixth lens (16), the seventh lens (17), the eighth lens (18), the ninth lens (19) constitute a rear end lens group; The first lens (11) has a negative focal power, the second lens (12) has a negative focal power, the third lens (13) has a negative focal power or a positive focal power, the fourth lens (14) has a positive focal power, the fifth lens (15) has a positive focal power, the sixth lens (16) has a negative focal power, the seventh lens (17) has a positive focal power, the eighth lens (18) has a negative focal power, and the ninth lens (19) has a negative focal power or a positive focal power; It satisfies the following conditional formula: 0.1<fg1 / fg2<3.5, wherein fg1 represents the combined focal length of the front end lens group, and fg2 represents the combined focal length of the rear end lens group; -25<f3 / f4<10, wherein f3 represents the effective focal length of the third lens (13), and f4 represents the effective focal length of the fourth lens (14), -2<f5 / f6<0, wherein f5 represents the effective focal length of the fifth lens (15), and f6 represents the effective focal length of the sixth lens (16); -5mm<f2 / Nd2<-2mm, wherein f2 represents the effective focal length of the second lens (12), and Nd2 represents the refractive index of the second lens (12); 1mm<f4 / Nd4<5mm, wherein f4 represents the effective focal length of the fourth lens (14), and Nd4 represents the refractive index of the fourth lens (14); |Vd2-Vd4|>10, wherein Vd2 represents the material Abbe number of the second lens (12), and Vd4 represents the material Abbe number of the fourth lens (14).

2. The panoramic optical lens according to claim 1, characterized in that: It satisfies the following conditional formula 2.0<Lg1 / Lg2<3.5, wherein Lg1 represents the total length of the front end lens group, and Lg2 represents the total length of the rear end lens group, and the group total length is defined as the distance from the first lens object side vertex to the last lens image side vertex; 0.5<D11 / TTL<1.5, wherein D11 represents the effective optical aperture of the object side surface of the first lens (11), and TTL represents the total optical length of the panoramic optical lens.

3. The panoramic optical lens according to claim 1, characterized in that: It satisfies the conditional formula 1.0mm / rad<IH / FOV<3.5mm / rad, wherein IH represents the image height of the panoramic optical lens corresponding to the full field angle of 200°, FOV corresponds to the half field angle, and rad represents the unit of radian.

4. The panoramic optical lens according to claim 1, characterized in that: satisfies a conditional expression -20 < (R12-R21) / CT12 < 60, wherein R12 represents a radius of curvature corresponding to an image-side surface of the first lens (11), R21 represents a radius of curvature corresponding to an object-side surface of the second lens (12), and CT12 represents an air gap of the first lens (11) and the second lens (12) on an optical axis; |ΔIH_90 / ΔCT12| < 0.2, |Δfocus / ΔCT12| < 0.06, wherein ΔIH_90 represents a change in image height of the panoramic optical lens at a field angle of 90 degrees corresponding to a change ΔCT12 in the air gap of the first lens (11) and the second lens (12), Δfocus represents a change in the position of the best imaging surface of the panoramic optical lens at a field angle of 90 degrees corresponding to a change value ΔCT12 in the air gap of the first lens (11) and the second lens (12), and ΔCT12 represents a change in the air gap of the first lens (11) and the second lens (12) on the optical axis of the panoramic optical lens.

5. The panoramic optical lens according to claim 4, characterized in that: ΔCT12 = 0.08 mm.

6. The panoramic optical lens according to claim 1, characterized in that: satisfies conditional expressions -0.2° / mm < θ82 / R82 < 0.5° / mm, 0.2° / mm < θ91 / R91 < 5.0° / mm, and 5.0° / mm < θ92 / R92 < 25.0° / mm, wherein θ82 represents an angle between a normal at a maximum optical aperture of an image-side surface of the eighth lens (18) and an optical axis, θ91 represents an angle between a normal at a maximum optical aperture of an object-side surface of the ninth lens (19) and the optical axis, θ92 represents an angle between a normal at a maximum optical aperture of an image-side surface of the ninth lens (19) and the optical axis, R82 represents a radius of curvature of the image-side surface of the eighth lens (18), R91 represents a radius of curvature of the object-side surface of the ninth lens (19), and R92 represents a radius of curvature of the image-side surface of the ninth lens (19).

7. The panoramic optical lens according to any one of claims 1-6, characterized in that: The image-side surface and the object-side surface of the seventh lens (17), the eighth lens (18), and the ninth lens (19) are each provided as an aspheric surface, and each of the image-side surface and the object-side surface of the seventh lens (17), the eighth lens (18), and the ninth lens (19) has at least one inflection point on a surface profile curve from the center to the edge.

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