A glass-plastic hybrid ultra-wide-angle imaging system

Abstract

The application discloses a kind of glass plastic hybrid's ultra-wide angle imaging system in the field of optical imaging technology, a kind of glass plastic hybrid's ultra-wide angle imaging system, including being arranged in order from object side to image side first lens, second lens, third lens, diaphragm, fourth lens, fifth lens and sixth lens;The object side surface and image side surface of the first lens are spherical surface, the object side surface and image side surface of the second lens, third lens, fourth lens, fifth lens and sixth lens are all aspherical surface;The first lens has negative refractive power, its object side surface is convex at near axis;The second lens has negative refractive power, its object side surface is concave;The third lens has positive refractive power, its image side surface is convex;The fourth lens has positive refractive power, its object side surface is convex at near axis, its image side surface is convex at near axis;The fifth lens has negative refractive power, its image side surface is concave;The sixth lens has positive refractive power, its object side surface is convex.

Description

Technical Field

[0001] This invention relates to the field of optical imaging technology, and more specifically to a glass-plastic hybrid ultra-wide-angle imaging system. Background Technology

[0002] With the development of technology, people have higher requirements for portable camera lenses or image imaging. Existing single lenses have a small field of view, which can lead to blind spots in shooting or imaging, resulting in less than ideal visual and image effects.

[0003] Furthermore, with the emergence of virtual reality technology, the camera lens in the virtual reality headset is an important component that determines people's visual experience in the virtual world. Summary of the Invention

[0004] The purpose of this invention is to provide a glass-plastic hybrid ultra-wide-angle imaging system to solve the technical problem that the field of view of a single lens in the prior art is small, resulting in blind spots in shooting or imaging, and the visual and image effects are not ideal.

[0005] To solve the above-mentioned technical problems, the present invention specifically provides a glass-plastic hybrid ultra-wide-angle imaging system, including a first lens, a second lens, a third lens, an aperture stop, a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side to the image side;

[0006] The object-side surface and image-side surface of the first lens are spherical, while the object-side surface and image-side surface of the second, third, fourth, fifth, and sixth lenses are all aspherical.

[0007] The first lens has negative refractive power, and its object-side surface is convex near the axis;

[0008] The second lens has negative refractive power and its object-side surface is concave.

[0009] The third lens has positive refractive power and its image-side surface is convex.

[0010] The fourth lens has positive refractive power, and its object side is convex at the paraxial position, and its image side is convex at the paraxial position.

[0011] The fifth lens has negative refractive power and its image-side surface is concave.

[0012] The sixth lens has positive refractive power and its measuring surface is convex.

[0013] The ultra-wide-angle imaging system satisfies the following relationship:

[0014] 0.358<f / R6<0.374, -32.21<V5-V6<-32.21;

[0015] f is the focal length of the ultra-wide-angle imaging system, R6 is the radius of curvature of the object side of the sixth lens, V5 is the dispersion coefficient of the fifth lens, and V6 is the dispersion coefficient of the sixth lens.

[0016] As a preferred embodiment of the present invention, the ultra-wide-angle imaging system also satisfies the following relationship:

[0017] -0.608<(R1+R2) / (R1-R2)<-0.448;

[0018] R1 is the radius of curvature of the object-side surface of the first lens, and R2 is the radius of curvature of the object-side surface of the second lens.

[0019] As a preferred embodiment of the present invention, the ultra-wide-angle imaging system also satisfies the following relationship:

[0020] 0.37<(CT1+CT2+CT3+CT4) / TTL<0.402;

[0021] CT1, CT2, CT3 and CT4 are the center thicknesses of the first lens, the second lens, the third lens and the fourth lens on the optical axis, respectively, and TTL is the total optical length of the ultra-wide-angle imaging system.

[0022] As a preferred embodiment of the present invention, the ultra-wide-angle imaging system also satisfies the following relationship:

[0023] 12.125 <AT1 / AT2<3.029;

[0024] AT1 is the center thickness of the first lens, and AT2 is the center thickness of the second lens.

[0025] As a preferred embodiment of the present invention, the ultra-wide-angle imaging system also satisfies the following relationship:

[0026] 7.22 <TTL / f<8.366。

[0027] As a preferred embodiment of the present invention, the ultra-wide-angle imaging system also satisfies the following relationship:

[0028] 2.672 <TL / Dg<2.843;

[0029] TL is the distance between the object-side vertex of the first lens and the imaging plane, and Dg is the diagonal length of the image plane at the maximum usable viewing angle of the ultra-wide-angle imaging system.

[0030] As a preferred embodiment of the present invention, the ultra-wide-angle imaging system also satisfies the following relationship:

[0031] 1.468 <f23 / f4<1.500;

[0032] f23 is the focal length of the combination of the second lens and the third lens, and f4 is the focal length of the fourth lens.

[0033] As a preferred embodiment of the present invention, the ultra-wide-angle imaging system further satisfies the following relationship:

[0034] 1.451 < AT4 / AT5 < 1.553; AT4 is the central thickness of the fourth lens, and AT5 is the central thickness of the fifth lens.

[0035] As a preferred embodiment of the present invention, the ultra-wide-angle imaging system further satisfies the following relationship:

[0036] 3.924 < f12 / f5 < 4.013;

[0037] f12 is the combined focal length of the first lens and the second lens, and f5 is the focal length of the fifth lens.

[0038] As a preferred embodiment of the present invention, the first lens is made of glass, and the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are all made of plastic.

[0039] The present invention has the following beneficial effects compared with the prior art:

[0040] The ultra-wide-angle imaging lens in the present invention is a six-lens type. The combination of the surface shape structure and the optimized range of the optical parameters of each lens can effectively shorten the overall size of the imaging lens and increase its lens angle while maintaining high imaging quality. It has high resolution brought by the ultra-wide angle and is an optical imaging lens technology integrating a super-wide angle and a large aperture, thus providing it for small or thin portable devices that require high imaging quality equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, other implementation drawings can be obtained by extending according to the provided drawings without creative work.

[0042] Figure 1 It is a schematic diagram of the ultra-wide-angle imaging system in Embodiment 1 of the present invention;

[0043] Figure 2 It is the field curvature and distortion curve diagram of the ultra-wide-angle imaging system in Embodiment 1 of the present invention;

[0044] Figure 3 This is an axial aberration curve of the ultra-wide-angle imaging system according to Embodiment 1 of the present invention;

[0045] Figure 4 This is a schematic diagram of the ultra-wide-angle imaging system in Embodiment 2 of the present invention;

[0046] Figure 5 This is a field curvature and distortion curve diagram of the ultra-wide-angle imaging system of Embodiment 2 of the present invention;

[0047] Figure 6 This is an axial aberration curve of the ultra-wide-angle imaging system according to Embodiment 2 of the present invention;

[0048] Figure 7 This is a schematic diagram of the ultra-wide-angle imaging system in Embodiment 3 of the present invention;

[0049] Figure 8 This is a field curvature and distortion curve diagram of the ultra-wide-angle imaging system of Embodiment 3 of the present invention;

[0050] Figure 9 This is an axial aberration curve of the ultra-wide-angle imaging system according to Embodiment 3 of the present invention;

[0051] Figure 10 This is a schematic diagram of the ultra-wide-angle imaging system in Embodiment 4 of the present invention;

[0052] Figure 11 This is a field curvature and distortion curve diagram of the ultra-wide-angle imaging system of Embodiment 4 of the present invention;

[0053] Figure 12 This is an axial aberration curve of the ultra-wide-angle imaging system of Embodiment 4 of the present invention;

[0054] Figure 13 This is a schematic diagram of the ultra-wide-angle imaging system in Embodiment 5 of the present invention;

[0055] Figure 14 This is a field curvature and distortion curve diagram of the ultra-wide-angle imaging system of Embodiment 5 of the present invention;

[0056] Figure 15 This is an axial aberration curve of the ultra-wide-angle imaging system of Embodiment 5 of the present invention.

[0057] The labels in the diagram represent the following:

[0058] First lens: 101, 201, 301, 401, 501;

[0059] Second lens: 102, 202, 302, 402, 502;

[0060] Third lenses: 103, 203, 303, 403, 503;

[0061] Apertures: 104, 204, 304, 404, 504;

[0062] Fourth lens: 105, 205, 305, 405, 505;

[0063] Fifth lens: 106, 206, 306, 406, 506;

[0064] Sixth lens: 107, 207, 307, 407, 507;

[0065] Infrared filters: 108, 208, 308, 408, 508. Detailed Implementation

[0066] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0067] Specifically, this invention provides a glass-plastic hybrid ultra-wide-angle imaging system, comprising a first lens, a second lens, a third lens, an aperture stop, a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side to the image side;

[0068] The object-side surface and image-side surface of the first lens are spherical, while the object-side surface and image-side surface of the second, third, fourth, fifth, and sixth lenses are all aspherical.

[0069] The first lens has negative refractive power, and its object-side surface is convex near the axis;

[0070] The second lens has negative refractive power and its object-side surface is concave.

[0071] The third lens has positive refractive power and its image-side surface is convex.

[0072] The fourth lens has positive refractive power, and its object side is convex at the paraxial position, and its image side is convex at the paraxial position.

[0073] The fifth lens has negative refractive power and its image-side surface is concave.

[0074] The sixth lens has positive refractive power and its measuring surface is convex.

[0075] The ultra-wide-angle imaging system satisfies the following relationship:

[0076] 0.358<f / R6<0.374, -32.21<V5-V6<-32.21;

[0077] f is the focal length of the ultra-wide-angle imaging system, R6 is the radius of curvature of the object side of the sixth lens, V5 is the dispersion coefficient of the fifth lens, and V6 is the dispersion coefficient of the sixth lens.

[0078] The ultra-wide-angle imaging lens in this invention is a six-element lens. The surface structure of each lens is combined with the optimal range of optical parameters, which can effectively shorten the overall size of the imaging lens and improve its lens angle while maintaining high imaging quality. It has the high resolution brought by ultra-wide angle and is an optical imaging lens technology that integrates ultra-wide angle and large aperture, thus providing it for use in small or thin portable devices that need to be equipped with high imaging quality equipment.

[0079] As a preferred embodiment of the present invention, the ultra-wide-angle imaging system also satisfies the following relationship:

[0080] -0.608<(R1+R2) / (R1-R2)<-0.448;

[0081] R1 is the radius of curvature of the object-side surface of the first lens, and R2 is the radius of curvature of the object-side surface of the second lens.

[0082] As a preferred embodiment of the present invention, the ultra-wide-angle imaging system also satisfies the following relationship:

[0083] 0.37<(CT1+CT2+CT3+CT4) / TTL<0.402;

[0084] CT1, CT2, CT3 and CT4 are the center thicknesses of the first lens, the second lens, the third lens and the fourth lens on the optical axis, respectively, and TTL is the total optical length of the ultra-wide-angle imaging system.

[0085] As a preferred embodiment of the present invention, the ultra-wide-angle imaging system also satisfies the following relationship:

[0086] 12.125 <AT1 / AT2<3.029;

[0087] AT1 is the center thickness of the first lens, and AT2 is the center thickness of the second lens.

[0088] As a preferred embodiment of the present invention, the ultra-wide-angle imaging system also satisfies the following relationship:

[0089] 7.22 <TTL / f<8.366。

[0090] As a preferred embodiment of the present invention, the ultra-wide angle imaging system further satisfies the following relationship:

[0091] 2.672 < TL / Dg < 2.843;

[0092] TL is the distance between the object-side vertex of the first lens and the imaging surface, and Dg is the diagonal length of the image formed by the maximum usable angle of view of the ultra-wide angle imaging system on the image plane.

[0093] As a preferred embodiment of the present invention, the ultra-wide angle imaging system further satisfies the following relationship:

[0094] 1.468 < f23 / f4 < 1.500;

[0095] f23 is the focal length of the combination of the second lens and the third lens, and f4 is the focal length of the fourth lens.

[0096] As a preferred embodiment of the present invention, the ultra-wide angle imaging system further satisfies the following relationship:

[0097] 1.451 < AT4 / AT5 < 1.553; AT4 is the central thickness of the fourth lens, and AT5 is the central thickness of the fifth lens.

[0098] As a preferred embodiment of the present invention, the ultra-wide angle imaging system further satisfies the following relationship:

[0099] 3.924 < f12 / f5 < 4.013;

[0100] f12 is the combined focal length of the first lens and the second lens, and f5 is the focal length of the fifth lens.

[0101] As a preferred embodiment of the present invention, the first lens is made of glass, and the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are all made of plastic.

[0102] Embodiment 1

[0103] Please refer to Figures 1 to 3 , Figure 1 which shows a schematic diagram of the ultra-wide angle imaging system according to Embodiment 1 of the present invention, Figure 2 which shows the field curvature and distortion curves of the ultra-wide angle imaging system according to Embodiment 1 of the present invention from left to right in sequence, Figure 3 and is the axial aberration curve of the ultra-wide angle imaging system of Embodiment 1.

[0104] The ultra-wide-angle imaging system in Embodiment 1 includes a first lens 101, a second lens 102, a third lens 103, an aperture 104, a fourth lens 105, a fifth lens 106, and a sixth lens 107 arranged sequentially from the object side to the image side;

[0105] The object-side surface and image-side surface of the first lens 101 are spherical, while the object-side surface and image-side surface of the second lens 102, the third lens 103, the fourth lens 105, the fifth lens 106 and the sixth lens 107 are aspherical.

[0106] The surface shapes of each lens are as follows:

[0107] The first lens 101 has negative refractive power, and its object side is convex near the axis;

[0108] The second lens 102 has negative refractive power, and its object-side surface is concave.

[0109] The third lens 103 has positive refractive power, and its image-side surface is convex.

[0110] The fourth lens 105 has positive refractive power, and its object side is convex near the axis, and its image side is convex near the axis.

[0111] The fifth lens 106 has negative refractive power and its image-side surface is concave.

[0112] The sixth lens 107 has positive refractive power and its measuring surface is convex.

[0113] In this ultra-wide-angle imaging system, the aperture stop 104 is located between the third lens 103 and the fourth lens 105, which helps to reduce the front port diameter, thereby achieving the effect of reducing the size of the optical imaging system.

[0114] This ultra-wide-angle imaging system also includes an infrared filter 108, which is placed between the sixth lens 107 and the imaging surface. The infrared filter 108 filters out infrared light entering the lens, preventing infrared light from shining onto the image sensor and causing noise. Specifically, the infrared filter 108 can be made of glass to avoid affecting the focal length.

[0115] Please refer to Tables 1-1 and 1-2 below for further information.

[0116]

[0117]

[0118] Table 1-1 shows the detailed structural data for Example 1, where the units for radius of curvature, thickness, and focal length are millimeters, f is the focal length of the optical imaging lens group, Fno is the aperture value, and FOV is the maximum field of view of the optical imaging lens group.

[0119] Surfaces 0 to 16 sequentially represent surfaces from the object side to the image side, where surfaces 1-16 sequentially represent the object surface of the first lens, the image surface of the first lens, the object surface of the second lens, the image surface of the second lens, the object surface of the third lens, the image surface of the third lens, the aperture, the object surface of the fourth lens, the image surface of the fourth lens, the object surface of the fifth lens, the image surface of the fifth lens, the object surface of the sixth lens, the image surface of the sixth lens, the object surface of the infrared filter, the image surface of the infrared filter, and the imaging plane.

[0120] Table 1-2 shows the aspheric coefficient data in Example 1, where k represents the conical coefficient in the aspheric curve equation, and A4, A6, A8, A10, A12, A14, and A16 represent the 4th, 6th, 8th, 10th, 12th, 14th, and 16th order aspheric coefficients of each surface.

[0121] Example 2

[0122] Please refer to the reference. Figures 4 to 6 , Figure 4 A schematic diagram of the ultra-wide-angle imaging system according to Embodiment 2 of the present invention is shown. Figure 5 The diagrams shown are, from left to right, the field curvature and distortion curves of the ultra-wide-angle imaging system of Embodiment 2 of the present invention. Figure 6 This is an axial aberration curve of the ultra-wide-angle imaging system in Example 2.

[0123] The ultra-wide-angle imaging system in Embodiment 2 includes a first lens 201, a second lens 202, a third lens 203, an aperture stop 204, a fourth lens 205, a fifth lens 206, and a sixth lens 207 arranged sequentially from the object side to the image side;

[0124] The object-side surface and image-side surface of the first lens 201 are spherical, while the object-side surface and image-side surface of the second lens 202, the third lens 203, the fourth lens 205, the fifth lens 206 and the sixth lens 207 are aspherical.

[0125] The surface shapes of each lens are as follows:

[0126] The first lens 201 has negative refractive power, and its object side is convex near the axis;

[0127] The second lens 202 has negative refractive power, and its object-side surface is concave.

[0128] The third lens 203 has positive refractive power, and its image-side surface is convex.

[0129] The fourth lens 205 has positive refractive power, and its object side is convex near the axis, and its image side is convex near the axis.

[0130] The fifth lens 206 has negative refractive power and its image-side surface is concave.

[0131] The sixth lens 207 has positive refractive power and its measuring surface is convex.

[0132] In this ultra-wide-angle imaging system, the aperture stop 204 is located between the third lens 203 and the fourth lens 205, which helps to reduce the front port diameter, thereby achieving the effect of reducing the size of the optical imaging system.

[0133] This ultra-wide-angle imaging system also includes an infrared filter 208, which is placed between the sixth lens 207 and the imaging surface. The infrared filter 208 filters out infrared light entering the lens, preventing infrared light from shining onto the image sensor and causing noise. Specifically, the infrared filter 208 can be made of glass to avoid affecting the focal length.

[0134] Please refer to Tables 2-1 and 2-2 below for details.

[0135]

[0136]

[0137] Example 3

[0138] Please refer to the reference. Figures 7 to 9 , Figure 7 A schematic diagram of the ultra-wide-angle imaging system according to Embodiment 3 of the present invention is shown. Figure 8 The diagrams shown are, from left to right, the field curvature and distortion curves of the ultra-wide-angle imaging system of Embodiment 3 of the present invention. Figure 9 This is an axial aberration curve of the ultra-wide-angle imaging system in Example 3.

[0139] The ultra-wide-angle imaging system in Embodiment 3 includes a first lens 301, a second lens 302, a third lens 303, an aperture 304, a fourth lens 305, a fifth lens 306, and a sixth lens 307 arranged sequentially from the object side to the image side;

[0140] The object-side surface and image-side surface of the first lens 303 are spherical, while the object-side surface and image-side surface of the second lens 302, the third lens 303, the fourth lens 305, the fifth lens 306 and the sixth lens 307 are aspherical.

[0141] The surface shapes of each lens are as follows:

[0142] The first lens 303 has negative refractive power, and its object side is convex near the axis;

[0143] The second lens 302 has negative refractive power, and its object-side surface is concave.

[0144] The third lens 303 has positive refractive power, and its image-side surface is convex.

[0145] The fourth lens 305 has positive refractive power, and its object side is convex at the paraxial position, and its image side is convex at the paraxial position.

[0146] The fifth lens 306 has negative refractive power and its image-side surface is concave.

[0147] The sixth lens 307 has positive refractive power and its measuring surface is convex.

[0148] In this ultra-wide-angle imaging system, the aperture stop 304 is located between the third lens 303 and the fourth lens 305, which helps to reduce the front port diameter, thereby achieving the effect of reducing the size of the optical imaging system.

[0149] This ultra-wide-angle imaging system also includes an infrared filter 308, which is placed between the sixth lens 307 and the imaging surface. The infrared filter 308 filters out infrared light entering the lens, preventing infrared light from shining onto the image sensor and causing noise. Specifically, the infrared filter 308 can be made of glass to avoid affecting the focal length.

[0150] Please refer to Tables 3-1 and 3-2 below for further information.

[0151]

[0152]

[0153]

[0154] Example 4

[0155] Please refer to the reference. Figures 10 to 12 , Figure 10 A schematic diagram of the ultra-wide-angle imaging system according to Embodiment 4 of the present invention is shown. Figure 11 The diagrams shown are, from left to right, the field curvature and distortion curves of the ultra-wide-angle imaging system of Embodiment 4 of the present invention. Figure 12 This is an axial aberration curve of the ultra-wide-angle imaging system in Example 4.

[0156] The ultra-wide-angle imaging system in Embodiment 4 includes a first lens 401, a second lens 402, a third lens 403, an aperture 404, a fourth lens 405, a fifth lens 406, and a sixth lens 407 arranged sequentially from the object side to the image side;

[0157] The object-side surface and image-side surface of the first lens 404 are spherical, while the object-side surface and image-side surface of the second lens 402, the third lens 403, the fourth lens 405, the fifth lens 406 and the sixth lens 407 are aspherical.

[0158] The surface shapes of each lens are as follows:

[0159] The first lens 404 has negative refractive power, and its object side is convex near the axis;

[0160] The second lens 402 has negative refractive power, and its object-side surface is concave.

[0161] The third lens 403 has positive refractive power, and its image-side surface is convex.

[0162] The fourth lens 405 has positive refractive power, and its object side is convex at the paraxial position, and its image side is convex at the paraxial position.

[0163] The fifth lens 406 has negative refractive power and its image-side surface is concave.

[0164] The sixth lens 407 has positive refractive power and its measuring surface is convex.

[0165] In this ultra-wide-angle imaging system, the aperture stop 404 is located between the third lens 403 and the fourth lens 405, which helps to reduce the front port diameter, thereby achieving the effect of reducing the size of the optical imaging system.

[0166] This ultra-wide-angle imaging system also includes an infrared filter 408, which is placed between the sixth lens 407 and the imaging surface. The infrared filter 408 filters out infrared light entering the lens, preventing infrared light from shining onto the image sensor and causing noise. Specifically, the infrared filter 408 can be made of glass to avoid affecting the focal length.

[0167] Please refer to Tables 4-1 and 4-2 below for further information.

[0168]

[0169]

[0170] Example 5

[0171] Please refer to the reference. Figures 13 to 15 , Figure 13 A schematic diagram of the ultra-wide-angle imaging system according to Embodiment 5 of the present invention is shown. Figure 14 The diagrams shown are, from left to right, the field curvature and distortion curves of the ultra-wide-angle imaging system of Embodiment 5 of the present invention. Figure 15 This is an axial aberration curve of the ultra-wide-angle imaging system in Example 5.

[0172] The ultra-wide-angle imaging system in Embodiment 5 includes a first lens 501, a second lens 502, a third lens 503, an aperture 504, a fourth lens 505, a fifth lens 506, and a sixth lens 507 arranged sequentially from the object side to the image side;

[0173] The object-side surface and image-side surface of the first lens 505 are spherical, while the object-side surface and image-side surface of the second lens 502, the third lens 503, the fourth lens 505, the fifth lens 506 and the sixth lens 507 are aspherical.

[0174] The surface shapes of each lens are as follows:

[0175] The first lens 505 has negative refractive power, and its object side is convex near the axis;

[0176] The second lens 502 has negative refractive power, and its object-side surface is concave.

[0177] The third lens 503 has positive refractive power, and its image-side surface is convex.

[0178] The fourth lens 505 has positive refractive power, and its object side is convex near the axis, and its image side is convex near the axis.

[0179] The fifth lens 506 has negative refractive power and its image-side surface is concave.

[0180] The sixth lens 507 has positive refractive power and its measuring surface is convex.

[0181] In this ultra-wide-angle imaging system, the aperture 504 is located between the third lens 503 and the fourth lens 505, which helps to reduce the front port diameter, thereby achieving the effect of reducing the size of the optical imaging system.

[0182] This ultra-wide-angle imaging system also includes an infrared filter 508, which is placed between the sixth lens 507 and the imaging surface. The infrared filter 508 filters out infrared light entering the lens, preventing infrared light from shining onto the image sensor and causing noise. Specifically, the infrared filter 508 can be made of glass to avoid affecting the focal length.

[0183] Please refer to Tables 5-1 and 5-2 below for further information.

[0184]

[0185]

[0186]

[0187] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A glass-plastic hybrid ultra-wide-angle imaging system, characterized in that, It consists of a first lens, a second lens, a third lens, an aperture stop, a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side to the image side; The object-side surface and image-side surface of the first lens are spherical, while the object-side surface and image-side surface of the second, third, fourth, fifth, and sixth lenses are all aspherical. The first lens has negative refractive power, and its object-side surface is convex near the optical axis; The second lens has negative refractive power and its object-side surface is concave. The third lens has positive refractive power and its image-side surface is convex. The fourth lens has positive refractive power, and its object side is convex near the optical axis, and its image side is convex near the optical axis. The fifth lens has negative refractive power and its image-side surface is concave. The sixth lens has positive refractive power and its measuring surface is convex. The ultra-wide-angle imaging system satisfies the following relationship: 0.358<f / R6<0.374, V5-V6=-32.21; f is the focal length of the ultra-wide-angle imaging system, R6 is the radius of curvature of the object-side surface of the sixth lens, V5 is the dispersion coefficient of the fifth lens, and V6 is the dispersion coefficient of the sixth lens; the ultra-wide-angle imaging system also satisfies the following relationship: ； The ultra-wide-angle imaging system also satisfies the following relationship: ； TL is the distance between the object-side vertex of the first lens and the imaging plane, and Dg is the diagonal length of the image plane at the maximum usable viewing angle of the ultra-wide-angle imaging system.

2. The ultra-wide-angle imaging system with glass-plastic hybrid technology according to claim 1, characterized in that, The ultra-wide-angle imaging system also satisfies the following relationship: ； R1 is the radius of curvature of the object-side surface of the first lens, and R2 is the radius of curvature of the object-side surface of the second lens.

3. The ultra-wide-angle imaging system with glass-plastic hybrid technology according to claim 1, characterized in that, The ultra-wide-angle imaging system also satisfies the following relationship: ； CT1, CT2, CT3 and CT4 are the center thicknesses of the first lens, the second lens, the third lens and the fourth lens on the optical axis, respectively, and TTL is the total optical length of the ultra-wide-angle imaging system.

4. The ultra-wide-angle imaging system with glass-plastic hybrid technology according to claim 1, characterized in that, The ultra-wide-angle imaging system also satisfies the following relationship: ； AT1 is the center thickness of the first lens, and AT2 is the center thickness of the second lens.

5. The ultra-wide-angle imaging system with glass-plastic hybrid technology according to claim 1, characterized in that, The ultra-wide-angle imaging system also satisfies the following relationship: ； f23 is the focal length of the combination of the second lens and the third lens, and f4 is the focal length of the fourth lens.

6. The ultra-wide-angle imaging system with glass-plastic hybrid technology according to claim 1, characterized in that, The ultra-wide-angle imaging system also satisfies the following relationship: ； AT4 is the center thickness of the fourth lens, and AT5 is the center thickness of the fifth lens.

7. The ultra-wide-angle imaging system with glass-plastic hybrid technology according to claim 1, characterized in that, The ultra-wide-angle imaging system also satisfies the following relationship: ； f12 is the combined focal length of the first lens and the second lens, and f5 is the focal length of the fifth lens.

8. The ultra-wide-angle imaging system with glass-plastic hybrid technology according to claim 1, characterized in that, The first lens is made of glass, while the second, third, fourth, fifth, and sixth lenses are all made of plastic.

Images