Large target surface micro light lens

Abstract

This invention provides a large-area low-light lens, comprising, along the optical axis from the object side to the imaging plane, the following elements in sequence: a first group of lenses, including a first lens, which is a convex-concave lens; a second group of lenses; a third group of lenses; a fourth group of lenses; a fifth group of lenses; a sixth group of lenses; a seventh group of lenses; an eighth group of lenses; a ninth group of lenses; and a tenth group of lenses; wherein the large-area low-light lens is composed of thirteen lenses in ten groups, the effective focal length f of the large-area low-light lens satisfies: 19.5 < f < 20.5, and the maximum field of view (FOV) of the large-area low-light lens satisfies: 71° < FOV < 73°. The large-area low-light lens provided by this invention has a simple structure and reasonable design. This lens uses thirteen lenses in ten groups to form a 1.7-inch large-area low-light lens, achieving high imaging clarity with a wide field of view while controlling the size and meeting the requirements of large-area imaging, thereby meeting the user's needs.

Description

Technical Field

[0001] This invention relates to the field of optical lens technology, and more specifically to a large-area low-light lens. Background Technology

[0002] The traditional market for purely optical aiming devices is gradually being replaced by digital aiming devices. Digital aiming devices adopt an optical + electronic mode, which leverages the advantages of signal digitization, while also greatly increasing the performance requirements for lenses.

[0003] A low-light lens is an optical device used in low-light environments to capture weak light and achieve clear imaging. However, in order to meet the requirements of a wide field of view and high resolution, a series of problems may occur, such as reduced resolution, distortion, and chromatic aberration, which will affect the imaging clarity of the low-light lens. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies and to solve the issues of reduced resolution, distortion, and chromatic aberration that occur in low-light lenses with high resolution and wide field of view.

[0005] To achieve the above objectives, the present invention can be implemented through the following technical solution: a large target surface low-light lens, comprising: along the optical axis from the object side to the imaging surface, sequentially comprising:

[0006] The first set of lenses includes a first lens, which is a convex-concave lens;

[0007] The second set of lenses includes a second lens, which is a convex-concave lens;

[0008] The third group of lenses includes a third lens, which is a concave-concave lens;

[0009] The fourth group of lenses includes a fourth lens, which is a convex lens;

[0010] The fifth group of lenses includes a fifth lens and a sixth lens, wherein the fifth lens is a concave-convex lens and the sixth lens is a concave-convex lens;

[0011] The sixth group of lenses includes a seventh lens, which is a convex-convex lens;

[0012] The seventh group of lenses includes an eighth lens and a ninth lens, wherein the eighth lens is a convex-convex lens and the ninth lens is a concave-concave lens;

[0013] The eighth group of lenses includes a tenth lens and an eleventh lens, wherein the tenth lens is a concave-convex lens and the eleventh lens is a concave-convex lens;

[0014] The ninth group of lenses includes the twelfth lens, which is a concave-convex lens;

[0015] The tenth group of lenses includes the thirteenth lens, which is a convex-convex lens;

[0016] The large-target low-light lens consists of thirteen lenses in ten groups. The effective focal length f of the large-target low-light lens satisfies: 19.5 < f < 20.5. The maximum field of view (FOV) of the large-target low-light lens satisfies: 71° < FOV < 73°.

[0017] In this embodiment of the invention, the distance between the first and second lens groups is 1.2mm-1.6mm; the distance between the second and third lens groups is 2.0mm-2.4mm; the distance between the third and fourth lens groups is 0.05mm-0.1mm; the distance between the fourth and fifth lens groups is 1.1mm-1.5mm; the distance between the fifth and sixth lens groups is 0.05mm-0.1mm; the distance between the sixth and seventh lens groups is 0.08mm-0.11mm; the distance between the seventh and eighth lens groups is 2.3mm-2.7mm; the distance between the eighth and ninth lens groups is 3.4mm-3.8mm; the distance between the ninth and tenth lens groups is 0.12mm-0.2mm; and the distance between the tenth lens group and the imaging plane is 4.0mm-4.4mm.

[0018] In this embodiment of the invention, the image side of the fifth lens and the object side of the sixth lens are glued together to form a fifth set of lenses;

[0019] The image side of the eighth lens and the object side of the ninth lens are glued together to form the seventh set of lenses;

[0020] The image side of the tenth lens and the object side of the eleventh lens are glued together to form the eighth set of lenses.

[0021] In this embodiment of the invention, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are placed sequentially to form a focusing group;

[0022] The eighth, ninth, tenth, eleventh, and twelfth lenses are placed sequentially to form a light-amplifying group.

[0023] The thirteenth lens is the outgoing lens group.

[0024] In this embodiment of the invention, the first lens has an object-side radius of curvature of 438±1mm and an image-side radius of curvature of -13±1mm; the second lens has an object-side radius of curvature of 20±1mm and an image-side radius of curvature of 72±1mm; the third lens has an object-side radius of curvature of -22±1mm and an image-side radius of curvature of 26±1mm; the fourth lens has an object-side radius of curvature of 22±1mm and an image-side radius of curvature of -24±1mm; the fifth lens has an object-side radius of curvature of -15±1mm and an image-side radius of curvature of -36±1mm; the sixth lens has an object-side radius of curvature of -36±1mm and an image-side radius of curvature of -15±1mm; and the seventh lens has an object-side radius of curvature of 20±1mm. The seventh lens has an image side radius of curvature of -113±1mm; the eighth lens has an image side radius of curvature of 17±1mm and -18±1mm; the ninth lens has an image side radius of curvature of -18±1mm and 11±1mm; the tenth lens has an image side radius of curvature of -185±1mm and -12±1mm; the eleventh lens has an image side radius of curvature of -12±1mm and -34±1mm; the twelfth lens has an image side radius of curvature of -10±1mm and -17±1mm; and the thirteenth lens has an image side radius of curvature of 41±1mm and -120±1mm.

[0025] In this embodiment of the invention, the refractive indices of the second, fourth, fifth, seventh, ninth, and thirteenth lenses satisfy the following condition: 1.7 < Nd < 2.1.

[0026] In this embodiment of the invention, the refractive indices of the first lens, the third lens, the sixth lens, the eighth lens, the tenth lens, the eleventh lens, and the twelfth lens satisfy the following condition: 1.5≤Nd≤1.7.

[0027] In this embodiment of the invention, the first lens, the second lens, the third lens, the fifth lens, the sixth lens, the ninth lens, the tenth lens, the eleventh lens, and the twelfth lens are all negative lenses;

[0028] The fourth, seventh, eighth, and thirteenth lenses are all positive lenses.

[0029] In this embodiment of the invention, the first lens, second lens, third lens, fifth lens, sixth lens, seventh lens, eighth lens, ninth lens, tenth lens, eleventh lens, and twelfth lens are all glass spherical lenses;

[0030] Both the fourth and thirteenth lenses are aspherical lenses.

[0031] In this embodiment of the invention, the aperture of the large-target low-light lens satisfies: 1.2 < Fno. < 2.0, and the principal ray angle of the large-target low-light lens satisfies: 9° < CRA < 11°.

[0032] Compared with the prior art, the advantages of this application are: simple structure and reasonable design. The lens is composed of thirteen lenses in ten groups to form a 1.7-inch large target surface low light lens. Under the premise of controlling the size and meeting the requirements of large target surface imaging, it achieves high imaging clarity under a wide field of view, thereby meeting the user's needs. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the lens assembly in the low-light lens provided in an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the lens assembly and optical path structure in the low-light lens provided in an embodiment of the present invention;

[0035] Figure 3 This is an MTF curve diagram provided in an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the field curvature and distortion curves provided in an embodiment of the present invention.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. First lens; 2. Second lens; 3. Second lens; 4. Second lens; 5. Second lens; 6. Second lens; 7. Second lens; 8. Second lens; 9. Second lens; 10. Second lens; 11. Second lens; 12. Second lens; 13. Second lens; 14. Imaging plane; 15. Optical axis. Detailed Implementation

[0039] The following are specific embodiments of the present invention, which, together with the accompanying drawings, will further describe the technical solution of the present invention.

[0040] like Figure 1-4 As shown, a large-target low-light lens includes: along the optical axis 15 from the object side to the imaging surface 14, the following components are sequentially included:

[0041] The first set of lenses includes a first lens 1, which is a convex or concave lens;

[0042] The second set of lenses includes a second lens 2, which is a convex or concave lens;

[0043] The third group of lenses includes the third lens 3, which is a concave-concave lens;

[0044] The fourth group of lenses includes the fourth lens 4, which is a convex lens;

[0045] The fifth group of lenses includes a fifth lens 5 and a sixth lens 6. The fifth lens 5 is a concave-convex lens, and the sixth lens 6 is a concave-convex lens.

[0046] The sixth group of lenses includes the seventh lens 7, which is a convex lens;

[0047] The seventh group of lenses includes the eighth lens 8 and the ninth lens 9. The eighth lens 8 is a convex-convex lens, and the ninth lens 9 is a concave-concave lens.

[0048] The eighth group of lenses includes the tenth lens 10 and the eleventh lens 11, where the tenth lens 10 is a concave-convex lens and the eleventh lens 11 is a concave-convex lens.

[0049] The ninth group of lenses includes the twelfth lens 12, which is a concave-convex lens;

[0050] The tenth group of lenses includes the thirteenth lens 13, which is a convex lens;

[0051] The large-area low-light lens consists of thirteen lenses in ten groups. The effective focal length f of the large-area low-light lens satisfies: 19.5 < f < 20.5, and the maximum field of view (FOV) of the large-area low-light lens satisfies: 71° < FOV < 73°.

[0052] Specifically, by Figure 1 As shown, optical axis 15 is the axis of symmetry of this large-target low-light lens. Along optical axis 15 from... Figure 1The lens features ten groups of thirteen lenses arranged alternately from left to right. Each lens has a unique concave-convex shape, and their arrangement and spacing alter the path of light (causing light to converge or diverge), achieving high image quality in wide-angle and telephoto scenarios. The effective focal length of the large-format low-light lens directly reflects its field of view, determining the image's angle of view and the magnification of the subject to meet the needs of wide-angle shooting. The maximum field of view of the large-format low-light lens directly reflects the imaging range it can cover, allowing the lens to observe a wider scene, thus increasing environmental awareness and capturing more of a broader range. Dynamic, especially in low-light environments, the large-area low-light lens further satisfies the following optical total length: 48 < TTL < 52. The optical total length reflects the physical length of the internal optical path in the lens. The above data demonstrates the compatibility of lens miniaturization with wide-angle and high-resolution shooting. Compared to the traditional lens setting where a larger photosensitive area usually results in a longer lens length and more lens groups, leading to an increase in overall lens length and weight, the large-area low-light lens of this application maintains a relatively small size for high-angle photography, easily capturing a wide field of view in confined spaces, while being portable and improving the user experience.

[0053] Furthermore, the first group of lenses are negative lenses, which initially compress light from a wide range to a smaller range; the second group of lenses are high-refractive-index negative lenses, which further compress light to a smaller range; the third group of lenses are biconcave negative lenses, which initially eliminate the aberrations produced by the previous groups; the fourth group of lenses are high-refractive-index positive aspherical lenses, which initially eliminate the distortions produced by the previous groups; the fifth group of lenses is a cemented lens combining a high-refractive-index negative lens and a negative lens, which mainly eliminates the chromatic aberration produced by the previous groups; the sixth group of lenses is a high-refractive-index positive lens, which compresses light to a minimum range to propagate to the aperture; the seventh group of lenses is a cemented lens combining a positive lens and a high-refractive-index negative lens, which further eliminates... The first group of lenses eliminates chromatic aberration and begins to diffuse light towards the image plane; the second group of lenses consists of a high dispersion negative lens and a high dispersion negative lens cemented together, further eliminating chromatic aberration and continuing to diffuse light towards the image plane 14; the third group of lenses is a high dispersion negative lens, which maximizes the beam to meet the edge requirements of large target imaging; the fourth group of lenses is a high refractive index positive aspherical lens, which eliminates aberrations and distortions generated by the previous groups and propagates light to the image plane for imaging. The combination of thirteen lenses in ten groups can reasonably optimize chromatic aberration, distortion, and aberrations in the lens, thereby enabling the lens to adapt to wide-angle shooting while improving imaging performance.

[0054] As a further embodiment of the present invention, the distance between the first and second lens groups is 1.2mm-1.6mm; the distance between the second and third lens groups is 2.0mm-2.4mm; the distance between the third and fourth lens groups is 0.05mm-0.1mm; the distance between the fourth and fifth lens groups is 1.1mm-1.5mm; the distance between the fifth and sixth lens groups is 0.05mm-0.1mm; the distance between the sixth and seventh lens groups is 0.08mm-0.11mm; the distance between the seventh and eighth lens groups is 2.3mm-2.7mm; the distance between the eighth and ninth lens groups is 3.4mm-3.8mm; the distance between the ninth and tenth lens groups is 0.12mm-0.2mm; and the distance between the tenth lens group and the imaging plane 14 is 4.0mm-4.4mm.

[0055] Table 1 shows the relevant parameters of each lens in the large-area low-light lens, including curvature, refractive index, thickness range, and spacing range, as shown in the table below. Table 1:

[0056]

[0057] As shown in Table 1 above, the interval between the fifth lens 5 and the sixth lens 6, the eighth lens 8 and the ninth lens 9, and the tenth lens 10 and the eleventh lens 11 is 0. This indicates that the fifth group of lenses, the seventh group of lenses, and the eighth group of lenses are all made of two lenses bonded together. The spacing range of the other lenses is shown in Table 1. The spacing range is the maximum assembly error of the lens. If the lens exceeds this spacing range, it will affect the imaging effect of the lens.

[0058] Furthermore, Table 1 also shows the lens thickness ranges. The thickness reflects the refractive index of the lens. The lens thickness is rationally set according to the required wide-angle shooting range and imaging needs of the lens. A reasonable lens thickness setting can effectively reduce the overall weight of the lens and improve the user experience. The thickness ranges for each lens are as follows: Lens 1: 0.9mm-1.1mm; Lens 2: 2.8mm-3.2mm; Lens 3: 0.9mm-1.1mm; Lens 4: 4.3mm-4.7mm; Lens 5: [Missing information - likely a range in mm]. The thickness ranges as follows: 0.7mm-1.0mm for the sixth lens 6, 2.9mm-3.3mm for the seventh lens 7, 3.3mm-3.8mm for the eighth lens 8, 4.2mm-4.6mm for the ninth lens 9, 0.7mm-1.0mm for the tenth lens 10, 4.0mm-4.4mm for the eleventh lens 11, 0.8mm-1.1mm for the twelfth lens 12, and 5.8mm-6.2mm for the thirteenth lens 13.

[0059] As a further embodiment of the present invention, the image side of the fifth lens 5 and the object side of the sixth lens 6 are bonded together to form a fifth group of lenses; the image side of the eighth lens 8 and the object side of the ninth lens 9 are bonded together to form a seventh group of lenses; and the image side of the tenth lens 10 and the object side of the eleventh lens 11 are bonded together to form an eighth group of lenses. The fifth, seventh, and eighth groups of lenses are each formed by bonding two lenses together. The two lenses are bonded together with UV glue or optical resin glue to form a composite lens, thereby making the optical properties of the two lenses complementary. This ensures that the bonded lens can stably transmit light, thereby enhancing the light utilization rate.

[0060] As a further embodiment of the present invention, the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, and the seventh lens 7 are placed sequentially to form a focusing group, and the eighth lens 8, the ninth lens 9, the tenth lens 10, the eleventh lens 11, and the twelfth lens 12 are placed sequentially to form a expanding group. The thirteenth lens 13 is the exiting group. An aperture is provided between the seventh lens 7 and the eighth lens 8. The light passes through the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, and the seventh lens 7 in sequence, and the light is continuously compressed and propagated to the aperture. Then, it is refracted sequentially from the eighth lens 8, the ninth lens 9, the tenth lens 10, the eleventh lens 11, and the twelfth lens 12, so that the light is continuously diffused and propagated. Finally, it is exited from the thirteenth lens 13 onto the imaging surface 14.

[0061] As a further embodiment of the present invention, the object-side radius of curvature of the first lens 1 is 438±1mm, and the image-side radius of curvature of the first lens 1 is -13±1mm; the object-side radius of curvature of the second lens 2 is 20±1mm, and the image-side radius of curvature of the second lens 2 is 72±1mm; the object-side radius of curvature of the third lens 3 is -22±1mm, and the image-side radius of curvature of the third lens 3 is 26±1mm; the object-side radius of curvature of the fourth lens 4 is 22±1mm, and the image-side radius of curvature of the fourth lens 4 is -24±1mm; the object-side radius of curvature of the fifth lens 5 is -15±1mm, and the image-side radius of curvature of the fifth lens 5 is -36±1mm; the object-side radius of curvature of the sixth lens 6 is -36±1mm, and the image-side radius of curvature of the sixth lens 6 is -15±1mm; the object-side radius of curvature of the seventh lens 7 is 20±1mm. The radius of curvature of the 7th lens (7 images) is -113±1mm; the radius of curvature of the 8th lens (8 objects) is 17±1mm, and the radius of curvature of the 8th lens (8 images) is -18±1mm; the radius of curvature of the 9th lens (9 objects) is -18±1mm, and the radius of curvature of the 9th lens (9 images) is 11±1mm; the radius of curvature of the 10th lens (10 objects) is -185±1mm, and the radius of curvature of the 10th lens (10 images) is -12±1mm; the radius of curvature of the 11th lens (11 objects) is -12±1mm, and the radius of curvature of the 11th lens (images) is -34±1mm; the radius of curvature of the 12th lens (12 objects) is -10±1mm, and the radius of curvature of the 12th lens (images) is -17±1mm; the radius of curvature of the 13th lens (13 objects) is 41±1mm, and the radius of curvature of the 13th lens (images) is -120±1mm.

[0062] Specifically, as mentioned above, the radius of curvature of the lenses in this large-area low-light lens can directly reflect the ability of each lens to deflect light, directly affect the focal length and image quality, directly reflect the optical path performance in the optical lens, and the size of the radius of curvature can directly determine the degree of bending of the lens.

[0063] As a further embodiment of the present invention, the design formula equation for the lens in the aerial survey lens is as follows:

[0064]

[0065] In the formula, parameter CURV is the curvature corresponding to the radius, Y is the radial coordinate, and K is the coefficient of the conic conic section. When K < -1, the lens surface curve is a hyperbola; when K = -1, the lens surface curve is a parabola; when -1 < K < 0, the lens surface curve is an ellipse; when K = 0, the lens surface curve is a circle; when K > 0, the lens surface curve is an oval. AH respectively denotes the coefficients corresponding to each radial coordinate.

[0066] As a further embodiment of the present invention, the refractive indices of the second lens 2, the fourth lens 4, the fifth lens 5, the seventh lens 7, the ninth lens 9, and the thirteenth lens 13 satisfy: 1.7 < Nd < 2.1, and the refractive indices of the first lens 1, the third lens 3, the sixth lens 6, the eighth lens 8, the tenth lens 10, the eleventh lens 11, and the twelfth lens 12 satisfy: 1.5 ≤ Nd ≤ 1.7.

[0067] As shown in Table 1 above, the refractive indices of the first lens 1, the sixth lens 6, and the tenth lens 10 are 1.6; the refractive indices of the second lens 2 and the seventh lens 7 are 2; the refractive index of the third lens 3 is 1.7; the refractive indices of the fourth lens 4, the fifth lens 5, and the thirteenth lens 13 are 1.8; and the refractive indices of the eighth lens 8, the eleventh lens 11, and the twelfth lens 12 are 1.5. The refractive index reflects the angle of refraction of light through the lens and directly affects the lens's imaging effect. Furthermore, high-refractive-index lenses can be made thinner and have a smaller curvature, allowing the lens to achieve both large imaging capacity and a smaller, lighter design. The refraction of light along the path... Figure 2 As shown.

[0068] As a further embodiment of the present invention, the first lens 1, the second lens 2, the third lens 3, the fifth lens 5, the sixth lens 6, the ninth lens 9, the tenth lens 10, the eleventh lens 11, and the twelfth lens 12 are all negative lenses. Negative lenses have a diverging effect on light, realizing beam control. The fourth lens 4, the seventh lens 7, the eighth lens 8, and the thirteenth lens 13 are all positive lenses. Positive lenses can converge light and magnify the image. In this large target surface low-light lens, the positive and negative lenses are combined according to the design, which can effectively cancel chromatic aberration and spherical aberration, thereby improving the image clarity.

[0069] As a further embodiment of the present invention, the first lens 1, the second lens 2, the third lens 3, the fifth lens 5, the sixth lens 6, the seventh lens 7, the eighth lens 8, the ninth lens 9, the tenth lens 10, the eleventh lens 11, and the twelfth lens 12 are all glass spherical lenses, while the fourth lens 4 and the thirteenth lens 13 are aspherical lenses. The surface of the spherical lens is spherical, which is suitable for imaging requirements, while the aspherical lens can guide the incident light to focus, reduce aberrations, and improve image quality.

[0070] As a further embodiment of the present invention, the aperture of the large-area low-light lens satisfies: 1.2 < Fno. < 2.0, and the principal ray angle of the large-area low-light lens satisfies: 9° < CRA < 11°. The aperture in the large-area low-light lens can directly affect the brightness and bokeh effect of the image, and the principal ray angle in the large-area low-light lens determines the image quality. The range of angle values ​​can affect the image uniformity and reduce the occurrence of vignetting and color deviation.

[0071] like Figure 3 This is a schematic diagram of the MTF curve. The vertical axis represents contrast reproduction capability, and the horizontal axis represents the distance from the center to the edge of the image. The diagram uses solid and dashed lines of different colors to represent the curvature of the solid and dashed lines in terms of contrast and resolution, which directly reflects the imaging effect of the lens from the center to the edge. Figure 4 The diagram shows the field curvature and distortion curves. The fluctuations in the curves directly reflect the image sharpness and geometry, and can directly demonstrate the imaging quality of this large-area low-light lens.

[0072] The technical solutions of the present invention described above provide solutions that are significantly different from those of the prior art, addressing the problem that existing technical solutions are too simplistic. The parts not covered in this application are the same as or can be implemented using existing technologies, and will not be described in detail here.

[0073] The technical solutions in the above embodiments have clearly and completely described the content of the present invention. 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.

Claims

1. A large-area low-light lens, characterized in that, include: Along the optical axis from the object side to the imaging plane, the following are included in sequence: The first set of lenses includes a first lens, which is a convex-concave lens; The second set of lenses includes a second lens, which is a convex-concave lens; The third group of lenses includes a third lens, which is a concave-concave lens; The fourth group of lenses includes a fourth lens, which is a convex lens; The fifth group of lenses includes a fifth lens and a sixth lens, wherein the fifth lens is a concave-convex lens and the sixth lens is a concave-convex lens; The sixth group of lenses includes a seventh lens, which is a convex-convex lens; The seventh group of lenses includes an eighth lens and a ninth lens, wherein the eighth lens is a convex-convex lens and the ninth lens is a concave-concave lens; The eighth group of lenses includes a tenth lens and an eleventh lens, wherein the tenth lens is a concave-convex lens and the eleventh lens is a concave-convex lens; The ninth group of lenses includes the twelfth lens, which is a concave-convex lens; The tenth group of lenses includes the thirteenth lens, which is a convex-convex lens; The large-target low-light lens consists of thirteen lenses in ten groups. The effective focal length f of the large-target low-light lens satisfies: 19.5 < f < 20.

5. The maximum field of view (FOV) of the large-target low-light lens satisfies: 71° < FOV < 73°.

2. The large-area low-light lens according to claim 1, characterized in that the distance between the first group of lenses and the second group of lenses is 1.2mm-1.6mm, the distance between the second group of lenses and the third group of lenses is 2.0mm-2.4mm, the distance between the third group of lenses and the fourth group of lenses is 0.05mm-0.1mm, the distance between the fourth group of lenses and the fifth group of lenses is 1.1mm-1.5mm, the distance between the fifth group of lenses and the sixth group of lenses is 0.05mm-0.1mm, the distance between the sixth group of lenses and the seventh group of lenses is 0.08mm-0.11mm, and the distance between the seventh group of lenses and the eighth group of lenses is... The distance between the eighth and ninth lens groups is 2.3mm-2.7mm, and the distance between the ninth and tenth lens groups is 3.4mm-3.8mm. The distance between the ninth and tenth lens groups is 0.12mm-0.2mm, and the distance between the tenth lens group and the imaging plane is 4.0mm-4.4mm.

3. The large-area low-light lens according to claim 1, characterized in that, The image side of the fifth lens and the object side of the sixth lens are glued together to form a fifth set of lenses; The image side of the eighth lens and the object side of the ninth lens are glued together to form the seventh set of lenses; The image side of the tenth lens and the object side of the eleventh lens are glued together to form the eighth set of lenses.

4. The large-area low-light lens according to claim 1, characterized in that, The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are placed sequentially to form a focusing group; The eighth, ninth, tenth, eleventh, and twelfth lenses are placed sequentially to form a light-amplifying group. The thirteenth lens is the outgoing lens group.

5. A large-target low-light lens according to claim 4, characterized in that, The first lens has an object-side radius of curvature of 438±1mm and an image-side radius of curvature of -13±1mm. The second lens has an object-side radius of curvature of 20±1mm and an image-side radius of curvature of 72±1mm. The third lens has an object-side radius of curvature of -22±1mm and an image-side radius of curvature of 26±1mm. The fourth lens has an object-side radius of curvature of 22±1mm and an image-side radius of curvature of -24±1mm. The fifth lens has an object-side radius of curvature of -15±1mm and an image-side radius of curvature of -36±1mm. The sixth lens has an object-side radius of curvature of -36±1mm and an image-side radius of curvature of -15±1mm. The seventh lens has an object-side radius of curvature of 20±1mm. The lateral curvature radius of the first lens is -113±1mm; the lateral curvature radius of the eighth lens is 17±1mm, and the lateral curvature radius of the eighth lens image is -18±1mm; the lateral curvature radius of the ninth lens is -18±1mm, and the lateral curvature radius of the ninth lens image is 11±1mm; the lateral curvature radius of the tenth lens is -185±1mm, and the lateral curvature radius of the tenth lens image is -12±1mm; the lateral curvature radius of the eleventh lens is -12±1mm, and the lateral curvature radius of the eleventh lens image is -34±1mm; the lateral curvature radius of the twelfth lens is -10±1mm, and the lateral curvature radius of the twelfth lens image is -17±1mm; the lateral curvature radius of the thirteenth lens is 41±1mm, and the lateral curvature radius of the thirteenth lens image is -120±1mm.

6. A large-target low-light lens according to claim 5, characterized in that, The refractive indices of the second, fourth, fifth, seventh, ninth, and thirteenth lenses satisfy the condition: 1.7 < Nd < 2.

1.

7. A large-target low-light lens according to claim 5, characterized in that, The refractive indices of the first, third, sixth, eighth, tenth, eleventh, and twelfth lenses satisfy the condition: 1.5 ≤ Nd ≤ 1.

7.

8. A large-target low-light lens according to claim 4, characterized in that, The first lens, the second lens, the third lens, the fifth lens, the sixth lens, the ninth lens, the tenth lens, the eleventh lens, and the twelfth lens are all negative lenses; The fourth, seventh, eighth, and thirteenth lenses are all positive lenses.

9. A large-area low-light lens according to claim 1, characterized in that, The first lens, the second lens, the third lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens, the eleventh lens, and the twelfth lens are all glass spherical lenses; Both the fourth and thirteenth lenses are aspherical lenses.

10. A large-area low-light lens according to claim 1, characterized in that, The aperture of the large-area low-light lens satisfies: 1.2 < Fno. < 2.0, and the principal ray angle of the large-area low-light lens satisfies: 9° < CRA < 11°.

Images