Wide-angle athermal glass-plastic hybrid lens

Abstract

The utility model discloses a wide-angle athermal glass plastic hybrid lens, including first lens, second lens, third lens, fourth lens and fifth lens which are sequentially arranged from object side to image side, first lens and second lens are meniscus glass spherical lens, third lens is meniscus plastic aspheric lens, fourth lens is glass spherical lens and the image side is convex, and fifth lens is double-convex plastic aspheric lens, and the focal length ratio of each lens is reasonably set. Make the lens meet the miniaturization light weight, high imaging quality and athermalization demand while being compatible with large target surface, large aperture and large field angle.

Description

Technical Field

[0001] This utility model belongs to the field of optical lens technology, specifically relating to a wide-angle, thermally non-thermal glass-plastic hybrid lens. Background Technology

[0002] As products continue to iterate, people's demands for wide field of view and high resolution are gradually increasing, especially in fields such as AI robots, weather monitoring, consumer radar, and express delivery identification and scanning. The lens acts as the "eye" of the product's analysis, recognition, and detection modules, playing a crucial role in subsequent software processing and photoelectric signal conversion. To improve the lens's detection capabilities in low-light environments, a large aperture is necessary. For wide-angle detection, a large field of view imaging is required, necessitating the use of detectors with large-area chips to enhance the resolution of the detected object and environment. However, in consumer-grade products, due to considerations of performance stability under different temperatures, all lenses are often made of glass, resulting in higher overall lens costs and hindering miniaturization and lightweight design. Furthermore, simultaneously achieving a large sensor size, large aperture, and large field of view is generally difficult and challenging to meet the requirements of miniaturization and lightweight design. Therefore, the problem of ensuring high-definition imaging with a large field of view and large sensor size urgently needs to be solved. Utility Model Content

[0003] The purpose of this invention is to address the above-mentioned problems by proposing a wide-angle, athermalized glass-plastic hybrid lens that, while being compatible with a large target surface, large aperture, and large field of view, meets the requirements of miniaturization, lightweight design, high imaging quality, and athermalization.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] This utility model proposes a wide-angle, non-thermalized glass-plastic hybrid lens, comprising a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged sequentially from the object side to the image side. The first and second lenses are meniscus glass spherical lenses, the third lens is a meniscus plastic aspherical lens, the fourth lens is a glass spherical lens with a convex image side, and the fifth lens is a biconvex plastic aspherical lens, satisfying the following conditions:

[0006] 0.50<|f1 / f2|<1.5; 0.10<|f2 / f3|<0.82; 3.0<|f3 / f4|<11.8; 0.21<|f4 / f5|<1.82;

[0007] Where f1, f2, f3, f4, and f5 are the focal lengths of the first lens, second lens, third lens, fourth lens, and fifth lens, respectively, in mm.

[0008] Preferably, the wide-angle, thermally non-thermally induced glass-plastic hybrid lens also meets the following conditions:

[0009]

[0010] Among them, R 11 R 21 R 31 R 41 R 51 The following are the object-side surface radii of curvature of the first, second, third, fourth, and fifth lenses, respectively, in mm; R 12 R 22 R 32 R 42 R 52 The image-side radii of curvature of the first, second, third, fourth, and fifth lenses, respectively, are in mm; "-" indicates a negative direction.

[0011] Preferably, the wide-angle, thermally non-thermally induced glass-plastic hybrid lens also meets the following conditions:

[0012]

[0013] Where, n d1 n d2 n d3 n d4 n d5 The refractive indices of the first, second, third, fourth, and fifth lenses, respectively, are v. d1 v d2 v d3 v d4 v d5 The Abbe numbers are, in order, the first lens, the second lens, the third lens, the fourth lens, and the fifth lens.

[0014] Preferably, the wide-angle, thermally non-thermally induced glass-plastic hybrid lens also meets the following conditions:

[0015] 3°≤φ≤8.5°;

[0016] Where φ is the maximum principal ray incident angle at the image plane of the wide-angle athermalized glass-plastic hybrid lens.

[0017] Preferably, the wide-angle, thermally non-thermally induced glass-plastic hybrid lens also meets the following conditions:

[0018] Φ16≤SD1≤Φ20;Φ8≤SD5≤Φ13.8;

[0019] Wherein, SD1 is the aperture of the first lens and SD5 is the aperture of the fifth lens, in mm.

[0020] Preferably, the wide-angle, thermally non-thermally induced glass-plastic hybrid lens also meets the following conditions:

[0021] 0.10≤IH / TTL≤0.23; 4≤IH≤5;

[0022] Where IH is the half-image height of the wide-angle athermalized glass-plastic hybrid lens, and TTL is the total optical length of the wide-angle athermalized glass-plastic hybrid lens, both in mm.

[0023] Preferably, the wide-angle, thermally non-thermally induced glass-plastic hybrid lens also meets the following conditions:

[0024] 25≤TTL≤30; 1.15≤Fno≤1.28;

[0025] Where TTL is the total optical length of the wide-angle athermalized glass-plastic hybrid lens, in mm, and Fno is the F-number of the wide-angle athermalized glass-plastic hybrid lens.

[0026] Preferably, an aperture stop is provided between the third lens and the fourth lens, and the wide-angle, thermally resistant glass-plastic hybrid lens also meets the following conditions:

[0027] 0.45 <SL / TTL<0.85;0.115<Bfl / TTL<0.195;

[0028] Where SL is the distance from the aperture stop to the image plane, Bfl is the optical back focal length of the wide-angle athermalized glass-plastic hybrid lens, and TTL is the total optical length of the wide-angle athermalized glass-plastic hybrid lens, all in mm.

[0029] Preferably, the wide-angle, thermally non-thermally induced glass-plastic hybrid lens also meets the following conditions:

[0030] 140°≤FOV≤160°; 3.1≤f≤3.7;

[0031] Wherein, FOV is the field of view of the wide-angle athermalized glass-plastic hybrid lens, and f is the focal length of the wide-angle athermalized glass-plastic hybrid lens, in mm.

[0032] Preferably, the wide-angle, calorimetric glass-plastic hybrid lens operates in the wavelength range of 905nm to 950nm, with a main wavelength of 940nm.

[0033] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0034] This lens is a hybrid glass-plastic lens compatible with large aperture, wide field of view, and large target area. By rationally configuring the focal length, shape, and material of each lens, the manufacturing difficulty and production yield of the lenses are reduced. While minimizing the head diameter, it ensures high imaging performance. Compared to all-glass lenses, it reduces the number of lenses and the overall weight of the lens, resulting in lower cost. Furthermore, by rationally allocating optical power and materials, it ensures the lens is heat-free, meeting reliability requirements at high and low temperatures, with minimal changes in image quality and no image degradation. The lens's f-theta distortion is between -8% and 5%. It meets the requirements of high resolution, heat-free operation, low distortion, and small aperture under large field of view and large target area conditions, while also being cost-effective and compact, facilitating miniaturization and easy assembly. It boasts high manufacturing yield and meets the low-cost, wear-resistant, and environmentally friendly requirements of consumer products. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the wide-angle athermalized glass-plastic hybrid lens of this utility model;

[0036] Figure 2 This is the MTF diagram of Embodiment 1 of this utility model;

[0037] Figure 3 This is a field curvature and distortion diagram of Embodiment 1 of this utility model;

[0038] Figure 4 This is a low-temperature (-20℃) defocusing curve diagram of Embodiment 1 of this utility model;

[0039] Figure 5 This is a high-temperature (85°C) defocusing curve diagram of Embodiment 1 of this utility model;

[0040] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of the wide-angle athermalized glass-plastic hybrid lens of this utility model;

[0041] Figure 7 This is the MTF diagram of Embodiment 2 of this utility model;

[0042] Figure 8 This is a field curvature and distortion diagram of Embodiment 2 of this utility model;

[0043] Figure 9 This is a low-temperature (-20℃) defocusing curve diagram of Embodiment 2 of this utility model;

[0044] Figure 10 This is a high-temperature (85°C) defocusing curve diagram of Embodiment 2 of this utility model;

[0045] Figure 11 This is a schematic diagram of the structure of Embodiment 3 of the wide-angle athermalized glass-plastic hybrid lens of this utility model;

[0046] Figure 12 This is the MTF diagram of Embodiment 3 of this utility model;

[0047] Figure 13 This is a field curvature and distortion diagram of Embodiment 3 of this utility model;

[0048] Figure 14 This is a low-temperature (-20℃) defocusing curve diagram of Embodiment 3 of this utility model;

[0049] Figure 15 This is a high-temperature (85°C) defocusing curve of Embodiment 3 of this utility model.

[0050] Explanation of reference numerals in the attached diagram: L1, first lens; L2, second lens; L3, third lens; L4, fourth lens; L5, fifth lens; STO, aperture stop; IR, filter; IMG, image plane. Detailed Implementation

[0051] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] It should be noted that, 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. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application.

[0053] like Figures 1-15 As shown, a wide-angle, thermally non-thermally heated hybrid glass-plastic lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5 arranged sequentially from the object side to the image side. The first lens L1 and the second lens L2 are meniscus glass spherical lenses, the third lens L3 is a meniscus plastic aspherical lens, the fourth lens L4 is a glass spherical lens with a convex image side, and the fifth lens L5 is a biconvex plastic aspherical lens, satisfying the following conditions:

[0054] 0.50<|f1 / f2|<1.5; 0.10<|f2 / f3|<0.82; 3.0<|f3 / f4|<11.8; 0.21<|f4 / f5|<1.82;

[0055] Where f1, f2, f3, f4, and f5 are the focal lengths of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5, respectively, in mm.

[0056] By allocating optical power to the plastic lenses, a heat-free lens design is achieved. Both the first lens L1 and the second lens L2 have relatively low optical power, working together to control the aperture of the first lens, thus achieving lens miniaturization and weight reduction. The first lens L1 uses a material with a hardness of H... K >660, wear degree F A The material with a density of <100, used as the first lens, still maintains good robustness in thermal shock and gravel tests. The fifth lens, L5, uses an aspherical plastic lens to correct spherical aberration and distortion, improving overall image quality, while keeping the number of lenses to five or less. In material selection, considering the stability of reliability at high and low temperatures, T62R material was used. This material exhibits the best reliability among plastics, and its transmittance is good in the infrared band, with high transmittance even under infrared light. Furthermore, the assembly misalignment of the third lens, L3, is more sensitive to performance issues. The lens design uses a double-end mounting, reducing the assembly requirements for the third lens L3, improving manufacturing yield, and achieving cost reduction.

[0057] This lens is a hybrid glass-plastic lens compatible with large aperture, wide field of view, and large target area. By rationally configuring the focal length, shape, and material of each lens, the manufacturing difficulty and production yield of the lenses are reduced. While minimizing the head diameter, it ensures high imaging performance. Compared to all-glass lenses, it reduces the number of lenses and the overall weight of the lens, resulting in lower cost. Furthermore, by rationally allocating optical power and materials, it ensures the lens is heat-free, meeting reliability requirements at high and low temperatures, with minimal changes in image quality and no image degradation. The lens's f-theta distortion is between -8% and 5%. It meets the requirements of high resolution, heat-free operation, low distortion, and small aperture under large field of view and large target area conditions, while also being cost-effective and compact, facilitating miniaturization and easy assembly. It boasts high manufacturing yield and meets the low-cost, wear-resistant, and environmentally friendly requirements of consumer products.

[0058] In one embodiment, the wide-angle athermalized glass-plastic hybrid lens also satisfies the following condition:

[0059]

[0060] Among them, R 11 R 21 R 31 R 41 R 51 The following are the object-side surface radii of curvature for the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5, in mm; R 12 R 22 R 32 R 42 R 52The image-side radii of curvature of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 are in mm, respectively; "-" indicates the negative direction.

[0061] Wide-angle lenses typically require lenses at the top to converge light. To ensure controllable angular convergence and eccentricity of this type of lens, the head of this wide-angle athermalized glass-plastic hybrid lens uses two meniscus lenses, the first lens L1 and the second lens L2. The angular convergence formed by the two lenses is less than 66 degrees. The third lens L3 accelerates and converges the light within the lens. The light is shaped at the fourth lens L4, and the aspherical surface of the fifth lens L5 greatly enhances the ability to converge light at the edges, achieving small distortion and high resolution performance with large aperture and large image height.

[0062] In one embodiment, the wide-angle athermalized glass-plastic hybrid lens also satisfies the following condition:

[0063]

[0064] Where, n d1 n d2 n d3 n d4 n d5 The refractive indices of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5, respectively, are v. d1 v d2 v d3 v d4 v d5 The Abbe numbers are, in order, those of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5.

[0065] The first lens L1 and the second lens L2 are made of high-refractive-index materials to ensure that the lens head maintains a small lens thickness and high transmittance even when achieving a wide angle. The first lens L1 and the second lens L2 are made of cost-effective plastic materials that are more stable in performance under different ambient temperatures. The two aspherical lenses, under the high-refractive-index fourth lens L4, soften the light path, reduce lens sensitivity, and improve yield.

[0066] In one embodiment, the wide-angle athermalized glass-plastic hybrid lens also satisfies the following condition:

[0067] 3°≤φ≤8.5°;

[0068] Wherein, φ is the maximum principal ray incident angle at the image plane IMG of the wide-angle athermal glass-plastic hybrid lens, which reduces the problem of light signal energy loss under large-angle incident angle and reduces the energy loss in the photoelectric signal conversion of the imaging chip.

[0069] In one embodiment, the wide-angle athermalized glass-plastic hybrid lens also satisfies the following condition:

[0070] Φ16≤SD1≤Φ20;Φ8≤SD5≤Φ13.8;

[0071] Wherein, SD1 is the aperture of the first lens L1, and SD5 is the aperture of the fifth lens L5, in mm.

[0072] In one embodiment, the wide-angle athermalized glass-plastic hybrid lens also satisfies the following condition:

[0073] 0.10≤IH / TTL≤0.23; 4≤IH≤5;

[0074] Where IH is the half-image height of the wide-angle athermalized glass-plastic hybrid lens, and TTL is the total optical length of the wide-angle athermalized glass-plastic hybrid lens, both in mm.

[0075] In one embodiment, the wide-angle athermalized glass-plastic hybrid lens also satisfies the following condition:

[0076] 25≤TTL≤30; 1.15≤Fno≤1.28;

[0077] Where TTL is the total optical length of the wide-angle athermalized glass-plastic hybrid lens, in mm, and Fno is the F-number of the wide-angle athermalized glass-plastic hybrid lens. While ensuring a large aperture, it is also compatible with large-area, high-performance, and relatively small targets.

[0078] In one embodiment, an aperture stop STO is further provided between the third lens L3 and the fourth lens L4, and the wide-angle athermalized glass-plastic hybrid lens also satisfies the following conditions:

[0079] 0.45 <SL / TTL<0.85;0.115<Bfl / TTL<0.195;

[0080] Where SL is the distance from the aperture stop STO to the image plane IMG, Bfl is the optical back focal length of the wide-angle athermalized glass-plastic hybrid lens, and TTL is the total optical length of the wide-angle athermalized glass-plastic hybrid lens, all in mm.

[0081] In one embodiment, the wide-angle athermalized glass-plastic hybrid lens also satisfies the following condition:

[0082] 140°≤FOV≤160°; 3.1≤f≤3.7;

[0083] Wherein, FOV is the field of view of the wide-angle athermalized glass-plastic hybrid lens, and f is the focal length of the wide-angle athermalized glass-plastic hybrid lens, in mm.

[0084] In one embodiment, the wide-angle, athermalized glass-plastic hybrid lens operates in the 905nm~950nm wavelength range, with a dominant wavelength of 940nm. This ensures clear imaging in low light conditions and provides good image quality.

[0085] For ease of understanding, the following detailed description is provided through specific embodiments.

[0086] The third lens L3 and the fifth lens L5 of the wide-angle, athermalized glass-plastic hybrid lens are aspherical lenses. Specifically, L3S1 is the object-side surface of the third lens L3, L3S2 is the image-side surface of the third lens L3, L5S1 is the object-side surface of the fifth lens L5, and L5S2 is the image-side surface of the fifth lens L5. In each embodiment, the aspherical equation satisfies the following expression:

[0087]

[0088] In the formula, Z For the arrow height, c For curvature, y Radial coordinates, k The coefficients of the conic conic section are... , , , , , , These are higher-order coefficients for aspherical surfaces.

[0089] Example 1:

[0090] like Figure 1 As shown, the wide-angle, thermally annealed glass-plastic hybrid lens of this embodiment consists of five lenses, including a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5 arranged sequentially from the object side to the image side. The first lens L1 is a meniscus glass spherical lens with negative optical power; the second lens L2 is a meniscus glass spherical lens with negative optical power; the third lens L3 is a meniscus plastic aspherical lens with negative optical power; the fourth lens L4 is a concave-convex glass spherical lens with positive optical power; and the fifth lens L5 is a biconvex plastic aspherical lens with positive optical power. The half-apertures of the first lens L1 to the fifth lens L5 are 9.8 mm, 8.65 mm, 3.65 mm, 4.98 mm, and 6.2 mm, respectively. An IR filter is also provided between the fifth lens L5 and the image plane (IMG). The optical parameters of this embodiment are shown in Table 1, and the aspherical coefficients of the third lens L3 and the fifth lens L5 are shown in Table 2.

[0091] Table 1

[0092]

[0093] Table 2

[0094]

[0095] Figure 2 This is the MTF chart of the wide-angle, athermalized glass-plastic hybrid lens in this embodiment. It represents the lens imaging modulation at different spatial frequencies in each field of view. The horizontal axis represents spatial frequency (unit: lp / mm), and the vertical axis represents the MTF value. From Figure 2 As can be seen, the MTF curve decreases smoothly and evenly from the center to the edge of the field of view. At 30 lp / mm, the MTF is >0.4 across the entire field of view from 0 to 1. Figure 3 The field curvature and distortion diagrams for the wide-angle athermalized glass-plastic hybrid lens in this embodiment show that the f-theta distortion is less than 1.8% within a field of view of 156°. Figure 4 and Figure 5 This is a defocus curve of the wide-angle athermalized glass-plastic hybrid lens in this embodiment at low and high temperatures. The on-axis peak value is taken as the center. The low temperature value can be controlled within -6 μm, and the high temperature value can be controlled within 3 μm.

[0096] Based on the above data and Figures 1-5 In this embodiment, the wide-angle, pyrolytic glass-plastic hybrid lens uses two plastic aspherical lenses and three glass spherical lenses. By effectively allocating optical power and lens shape, reliability under high and low temperatures is ensured. The aperture is 1.26, the effective focal length is 3.5mm, the entrance pupil diameter is 2.8mm, the maximum field of view corresponds to a maximum half image height (IH) of 4.78mm, the IH / TTL is 0.161, and the total optical length (TTL) is less than 30mm, effectively saving assembly space and providing good image quality.

[0097] Example 2:

[0098] like Figure 6 As shown, the wide-angle, athermalized glass-plastic hybrid lens of this embodiment consists of five lenses, including a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5 arranged sequentially from the object side to the image side. The first lens L1 is a meniscus glass spherical lens with negative optical power; the second lens L2 is a meniscus glass spherical lens with negative optical power; the third lens L3 is a meniscus plastic aspherical lens with negative optical power; the fourth lens L4 is a biconvex glass spherical lens with positive optical power; and the fifth lens L5 is a biconvex plastic aspherical lens with positive optical power. The half-apertures of the first lens L1 to the fifth lens L5 are 9.25 mm, 5.61 mm, 3.66 mm, 5.85 mm, and 5.02 mm, respectively. An IR filter is also provided between the fifth lens L5 and the image plane (IMG). The optical parameters of this embodiment are shown in Table 3, and the aspherical coefficients of the third lens L3 and the fifth lens L5 are shown in Table 4.

[0099] Table 3

[0100]

[0101] Table 4

[0102]

[0103] Figure 7 This is the MTF chart of the wide-angle, athermalized glass-plastic hybrid lens in this embodiment. It represents the lens imaging modulation at different spatial frequencies in each field of view. The horizontal axis represents spatial frequency (unit: lp / mm), and the vertical axis represents the MTF value. From Figure 7 As can be seen, the MTF curve decreases smoothly and evenly from the center to the edge of the field of view. At 30 lp / mm, the MTF is >0.6 across the entire field of view from 0 to 1. Figure 8 The field curvature and distortion diagrams for the wide-angle athermalized glass-plastic hybrid lens in this embodiment show that within a field of view of 156°, the f-theta distortion is negative and the absolute value is less than 7.5%. Figure 9 and Figure 10 This is a defocus curve of the wide-angle athermal glass-plastic hybrid lens in this embodiment at low and high temperatures. With the on-axis peak value as the center, the low temperature can be controlled within 6µm and the high temperature can be controlled within -3µm.

[0104] Based on the above data and Figures 6-10 This embodiment of the wide-angle, athermalized glass-plastic hybrid lens employs two plastic aspherical lenses and three glass spherical lenses. By effectively allocating optical power and lens shape, reliability under high and low temperatures is ensured. The aperture size is 1.26, the effective focal length in this embodiment is 3.66mm, the maximum half-image height (IH) corresponding to the maximum field of view is 4.68mm, the entrance pupil diameter is 2.93mm, the IH / TTL is 0.156, and the total optical length (TTL) is less than 30mm, effectively saving assembly space and meeting the requirements for clear imaging in low light with good image quality.

[0105] Example 3:

[0106] like Figure 11As shown, the wide-angle, athermalized glass-plastic hybrid lens of this embodiment consists of five lenses, including a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5 arranged sequentially from the object side to the image side. The first lens L1 is a meniscus glass spherical lens with negative optical power; the second lens L2 is a meniscus glass spherical lens with negative optical power; the third lens L3 is a meniscus plastic aspherical lens with negative optical power; the fourth lens L4 is a plano-convex spherical lens with positive optical power; and the fifth lens L5 is a biconvex plastic aspherical lens with positive optical power. The half-apertures of the first lens L1 to the fifth lens L5 are 9.15 mm, 5.6 mm, 3.7 mm, 4.0 mm, and 6.3 mm, respectively. An IR filter is also provided between the fifth lens L5 and the image plane (IMG). The optical parameters of this embodiment are shown in Table 5, and the aspherical coefficients of the third lens L3 and the fifth lens L5 are shown in Table 6.

[0107] Table 5

[0108]

[0109] Table 6

[0110]

[0111] Figure 12 This is the MTF chart of the wide-angle, athermalized glass-plastic hybrid lens in this embodiment. It represents the lens imaging modulation at different spatial frequencies in each field of view. The horizontal axis represents spatial frequency (unit: lp / mm), and the vertical axis represents the MTF value. From Figure 12 As can be seen, the MTF curve decreases smoothly and evenly from the center to the edge of the field of view. At 30 lp / mm, the MTF is >0.4 across the entire field of view from 0 to 1. Figure 13 The field curvature and distortion diagrams for the wide-angle athermalized glass-plastic hybrid lens in this embodiment show that the f-theta distortion is less than 1.5% within a field of view of 156°. Figure 14 and Figure 15 This is a defocus curve of the wide-angle athermal glass-plastic hybrid lens in this embodiment at low and high temperatures. With the on-axis peak value as the center, the low temperature can be controlled within -2µm and the high temperature can be controlled within 2µm.

[0112] Based on the above data and Figures 11-15This embodiment of the wide-angle, athermalized glass-plastic hybrid lens employs two plastic aspherical lenses and three glass spherical lenses. By effectively allocating optical power and lens shape, reliability under high and low temperatures is ensured. The aperture is f / 1.21, the effective focal length is 3.50mm, the maximum half-image height (IH) corresponding to the maximum field of view is 4.81mm, the entrance pupil diameter is 2.92mm, and the IH / TTL is 0.161. This effectively saves assembly space, meets the requirements for clear imaging in low light, and provides good image quality. Furthermore, compared to Embodiments 1 and 2, this embodiment reduces the requirements for the total optical length and the aperture of the first lens L1, resulting in a more compact product. Structurally, the dual-end mounting design ensures lens usability under different ambient temperatures, and the overall structure is more compact, with a total optical length (TTL) of less than 28mm, effectively saving assembly space.

[0113] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0114] The embodiments described above are merely specific and detailed examples of the embodiments described in this application, and should not be construed as limiting the scope of the application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the appended claims.

Claims

1. A wide-angle, thermally non-thermally heated glass-plastic hybrid lens, characterized in that: The wide-angle, athermalized glass-plastic hybrid lens comprises a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), and a fifth lens (L5) arranged sequentially from the object side to the image side. The first lens (L1) and the second lens (L2) are meniscus glass spherical lenses, the third lens (L3) is a meniscus plastic aspherical lens, the fourth lens (L4) is a glass spherical lens with a convex image side, and the fifth lens (L5) is a biconvex plastic aspherical lens, satisfying the following conditions: 0.50<|f1 / f2|<1.5; 0.10<|f2 / f3|<0.82; 3.0<|f3 / f4|<11.8; 0.21<|f4 / f5|<1.82; Where f1, f2, f3, f4, and f5 are the focal lengths of the first lens (L1), the second lens (L2), the third lens (L3), the fourth lens (L4), and the fifth lens (L5), respectively, in mm.

2. The wide-angle, thermally non-thermally oxidized glass-plastic hybrid lens as described in claim 1, characterized in that: The wide-angle, athermalized glass-plastic hybrid lens also meets the following conditions: Among them, R 11 R 21 R 31 R 41 R 51 The following are the object-side surface radii of curvature of the first lens (L1), second lens (L2), third lens (L3), fourth lens (L4), and fifth lens (L5), respectively, in mm; R 12 R 22 R 32 R 42 R 52 The image-side surface curvature radii of the first lens (L1), second lens (L2), third lens (L3), fourth lens (L4), and fifth lens (L5) are in mm, respectively; "-" indicates the negative direction.

3. The wide-angle, thermally insulated glass-plastic hybrid lens as described in claim 1, characterized in that: The wide-angle, athermalized glass-plastic hybrid lens also meets the following conditions: Where, n d1 n d2 n d3 n d4 n d5 The refractive indices of the first lens (L1), second lens (L2), third lens (L3), fourth lens (L4), and fifth lens (L5) are, in order, v. d1 v d2 v d3 v d4 v d5 The Abbe numbers are, in order, the first lens (L1), the second lens (L2), the third lens (L3), the fourth lens (L4), and the fifth lens (L5).

4. The wide-angle, thermally non-thermally oxidized glass-plastic hybrid lens as described in claim 1, characterized in that: The wide-angle, athermalized glass-plastic hybrid lens also meets the following conditions: 3°≤φ≤8.5°; Wherein, φ is the maximum principal ray incident angle at the image plane (IMG) of the wide-angle athermalized glass-plastic hybrid lens.

5. The wide-angle, thermally non-thermally oxidized glass-plastic hybrid lens as described in claim 1, characterized in that: The wide-angle, athermalized glass-plastic hybrid lens also meets the following conditions: Φ16≤SD1≤Φ20;Φ8≤SD5≤Φ13.8; Wherein, SD1 is the aperture of the first lens (L1), and SD5 is the aperture of the fifth lens (L5), in mm.

6. The wide-angle, athermalized glass-plastic hybrid lens as described in claim 1, characterized in that: The wide-angle, athermalized glass-plastic hybrid lens also meets the following conditions: 0.10≤IH / TTL≤0.23; 4≤IH≤5; Wherein, IH is the half-image height of the wide-angle athermalized glass-plastic hybrid lens, and TTL is the total optical length of the wide-angle athermalized glass-plastic hybrid lens, both in mm.

7. The wide-angle, thermally insulated glass-plastic hybrid lens as described in claim 1, characterized in that: The wide-angle, athermalized glass-plastic hybrid lens also meets the following conditions: 25≤TTL≤30; 1.15≤Fno≤1.28; Wherein, TTL is the total optical length of the wide-angle athermalized glass-plastic hybrid lens, in mm, and Fno is the F-number of the wide-angle athermalized glass-plastic hybrid lens.

8. The wide-angle, thermally non-thermally oxidized glass-plastic hybrid lens as described in claim 1, characterized in that: An aperture stop (STO) is also provided between the third lens (L3) and the fourth lens (L4), and the wide-angle athermalized glass-plastic hybrid lens also meets the following conditions: 0.45 <SL / TTL<0.85;0.115<Bfl / TTL<0.195; Wherein, SL is the distance from the aperture stop (STO) to the image plane (IMG), Bfl is the optical back focal length of the wide-angle athermalized glass-plastic hybrid lens, and TTL is the total optical length of the wide-angle athermalized glass-plastic hybrid lens, all in mm.

9. The wide-angle, thermally non-thermally oxidized glass-plastic hybrid lens as described in claim 1, characterized in that: The wide-angle, athermalized glass-plastic hybrid lens also meets the following conditions: 140°≤FOV≤160°; 3.1≤f≤3.7; Wherein, FOV is the field of view of the wide-angle athermalized glass-plastic hybrid lens, and f is the focal length of the wide-angle athermalized glass-plastic hybrid lens, in mm.

10. The wide-angle, athermalized glass-plastic hybrid lens as described in claim 1, characterized in that: The wide-angle, athermalized glass-plastic hybrid lens operates in the 905nm~950nm band, with a main wavelength of 940nm.

Images