Large-image-plane high-resolution near-to-eye detection lens

Abstract

The invention relates to the technical field of optical imaging, in particular to a large-image-plane high-resolution near-to-eye detection lens. Comprising a diaphragm, a first lens module, a second lens module, a third lens module and an image surface which are sequentially arranged from an object side to an image side, the diaphragm is used for transmitting light; the first lens module is used for receiving and transmitting light passing through the diaphragm, and the first lens module is also used for compressing an angle; the second lens module is used for receiving and transmitting the light passing through the first lens module, and the second lens module is also used for compressing the aperture and expanding the view field angle; the third lens module is used for receiving and transmitting the light passing through the second lens module, and the third lens module is also used for converging the light passing through the third lens module and converging the light on the image plane; the image surface is used for imaging; the imaging definition and integrity of the lens are improved, the lens is compatible with imaging conditions of different human eyes, and the detection effect of the lens is improved.

Description

Technical Field

[0001] The present invention relates to the field of optical imaging technology, and in particular to a near-eye detection lens with a large image surface and high resolution. Background Art

[0002] Near-eye display refers to the use of optical technology to guide the image light emitted by a micro-image light source to the user's pupil through an eyepiece system, thereby realizing a virtual, magnified image within the user's near-eye range, and providing the user with intuitive image, video or text information. At present, the near-eye display technology on the market is generally widely used in virtual reality systems (VR), augmented reality systems (AR), mixed reality systems (MR), etc. As users have increasing demands for interactivity and immersion in virtual images, text and other information, related near-eye display devices such as head-mounted displays, AR glasses, VR helmets and other functional AR wearable devices have become more and more popular.

[0003] At present, the imaging quality of near-eye display devices is mostly judged by human eye observation. Due to individual differences, subjective judgment is prone to deviation. Therefore, a solution has emerged to use optical lenses and supporting visual inspection devices to conduct quality inspection on near-eye display devices.

[0004] However, in the existing visual inspection devices for inspecting the above-mentioned near-eye display devices, the optical lenses used for imaging quality inspection of near-eye display devices have problems such as low resolution and small inspection field of view, unclear imaging, incomplete imaging, etc. At the same time, due to the large differences in human eyes, there are problems such as difficulty in compatibility with the imaging conditions of different human eyes and poor simulation of human eye visual experience. As a result, various types of VR / AR products cannot be comprehensively inspected, resulting in uneven display performance of various types of VR / AR products.

[0005] Therefore, there is an urgent need to provide a large image surface and high resolution near-eye detection lens, which can improve the imaging clarity and integrity of the lens compared with the existing technology, make the lens compatible with the imaging conditions of different human eyes, and improve the detection effect of the lens. Summary of the invention

[0006] The present invention solves the technical problems existing in the prior art and provides a near-eye detection lens with a large image plane and high resolution.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A large image plane high-resolution near-eye detection lens, comprising an aperture, a first lens module, a second lens module, a third lens module and an image plane, which are sequentially arranged from the object side to the image side; the aperture is used to transmit light; the first lens module is used to receive and transmit light passing through the aperture, and the first lens module is also used to compress the angle; the second lens module is used to receive and transmit light passing through the first lens module, and the second lens module is also used to compress the aperture and expand the field of view; the third lens module is used to receive and transmit light passing through the second lens module, and the third lens module is also used to converge the light passing through it and converge the light on the image plane; the image plane is used to perform imaging; The focal length of the first lens module Total focal length The ratio is: ; The focal length of the second lens module Total focal length Ratio of: ; The focal length of the third lens module Total focal length The ratio is: .

[0008] Furthermore, the first lens module includes a plurality of single lenses and a first cemented lens, and the plurality of single lenses are respectively distributed on both sides of the first cemented lens; The first cemented lens is provided with at least a first lens and a second lens near the object side, the light receiving surface of the first lens is a concave surface, the light emitting surface of the first lens is a convex surface, the light receiving surface of the second lens is a concave surface, and the light emitting surface of the second lens is a convex surface; the first cemented lens is provided with at least a third lens near the image side, the light receiving surface and the light emitting surface of the third lens are both convex surfaces; The first cemented lens includes a first sub-lens and a second sub-lens, the light receiving surface and the light emitting surface of the first sub-lens are both concave surfaces, and the light receiving surface and the light emitting surface of the second sub-lens are both convex surfaces.

[0009] Furthermore, the focal length of the first lens is for: , the focal length of the second lens for: ; The focal length of the first sub-lens for: , the focal length of the second sub-lens for: .

[0010] Furthermore, the second lens module includes a plurality of single lenses and a second cemented lens, and the plurality of single lenses are evenly distributed on both sides of the second cemented lens; The second cemented lens is provided with at least a fourth lens near the object side, the light receiving surface of the fourth lens is a convex surface, and the light emitting surface of the fourth lens is a plane; the second cemented lens is provided with at least a fifth lens near the image side, the light receiving surface of the fifth lens is a convex surface, and the light emitting surface of the fifth lens is a plane; The second cemented lens includes a third sub-lens, a fourth sub-lens, a fifth sub-lens, a sixth sub-lens and a seventh sub-lens, the light receiving surface and the light emitting surface of the third sub-lens are both convex surfaces, the light receiving surface and the light emitting surface of the fourth sub-lens are respectively concave and flat, the light receiving surface and the light emitting surface of the fifth sub-lens are both flat, the light receiving surface and the light emitting surface of the sixth sub-lens are both flat, and the light receiving surface and the light emitting surface of the seventh sub-lens are respectively flat and convex.

[0011] Furthermore, the focal length of the fourth lens for: , the focal length of the fifth lens for: , the focal length of the third sub-lens for: , the focal length of the fourth sub-lens for: , the focal length of the fifth sub-lens for: , the focal length of the sixth sub-lens for: , the focal length of the seventh sub-lens for: .

[0012] Further, the third lens module comprises a third cemented lens, a fourth cemented lens, a fifth cemented lens and at least two single lenses, and the third cemented lens, the third cemented lens, the third cemented lens and the two single lenses are arranged in sequence from the object side to the image side respectively; The third lens module is provided with at least a sixth lens and a seventh lens, the light receiving surface and the light emitting surface of the sixth lens are convex and concave respectively, and the light receiving surface and the light emitting surface of the seventh lens are convex and flat respectively.

[0013] Furthermore, the third cemented lens includes an eighth sub-lens and a ninth sub-lens, the light receiving surface and the light emitting surface of the eighth sub-lens are both concave surfaces, and the light receiving surface and the light emitting surface of the ninth sub-lens are both convex surfaces; the fourth cemented lens includes a tenth sub-lens and an eleventh sub-lens, the light receiving surface and the light emitting surface of the tenth sub-lens are both convex surfaces, and the light receiving surface and the light emitting surface of the eleventh sub-lens are both flat surfaces; the fifth cemented lens includes a twelfth sub-lens and a thirteenth sub-lens, the light receiving surface and the light emitting surface of the twelfth sub-lens are respectively a flat surface and a convex surface, and the light receiving surface and the light emitting surface of the thirteenth sub-lens are respectively a flat surface and a convex surface.

[0014] Furthermore, the focal length of the sixth lens is for: , the focal length of the seventh lens for: ; The focal length of the eighth sub-lens for: , the focal length of the ninth sub-lens for: , the focal length of the tenth sub-lens for: , the focal length of the eleventh sub-lens for: , the focal length of the twelfth sub-lens for: , the focal length of the thirteenth sub-lens for: .

[0015] Furthermore, the field of view angle range of the near-eye detection lens is: 120° 130°, the range of total focal length f is: , the object distance is greater than or equal to 0.25m, and the aspect ratio of the effective photosensitive area is 1:1.

[0016] Furthermore, the focal length of the first lens module is Total focal length The ratio is set to , the focal length of the second lens module Total focal length The ratio is set to , the focal length of the third lens module Total focal length The ratio is set to , , , Satisfy the following formula: ; ; ; ; In the above formula, represents the focal length of the i-th first lens module obtained through machine learning screening, Represents the total number of focal lengths of all first lens modules screened by machine learning, represents the focal length of the jth second lens module obtained through machine learning screening, Represents the total number of focal lengths of all second lens modules screened by machine learning, represents the focal length of the kth third lens module obtained through machine learning screening, Indicates the total number of focal lengths of all third lens modules screened by machine learning; represents the correction coefficient of the first lens module, represents the correction coefficient of the second lens module, Indicates the correction coefficient of the third lens module.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The near-eye detection lens provided by the present invention can achieve an MTF of more than 0.22 at a 125° field of view, while taking into account that the relative illumination of the field of view within 80° reaches more than 0.6. According to the MTF curve, in the case of 144 line pairs (corresponding to a camera with 3.45um pixels), the 125° field of view can still have an MTF value of 0.1, which can meet the normal imaging indicators of conventional cameras; for cameras with large pixels (5.5um pixels, corresponding to 90 line pairs), the minimum MTF value is close to 0.5, and the resolution fully meets the image processing requirements. The lens has good imaging uniformity and high resolution, and meets the requirements of large field of view and large image surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention without light.

[0019] Figure 2 It is a schematic diagram of the overall structure of the present invention through light.

[0020] Figure 3 is an MTF curve diagram of an embodiment of the present invention.

[0021] Figure 4 is a distortion curve diagram of an embodiment of the present invention.

[0022] Figure 5 Schematic diagram of illumination according to an embodiment of the present invention.

[0023] Figure 6 It is the MTF curve diagram of the first comparison group of the present invention.

[0024] Figure 7 3 is a distortion curve diagram of the first comparison group of the present invention.

[0025] Figure 8 Schematic diagram of illumination of the first comparison group of the present invention.

[0026] Fig. 9 It is the MTF curve diagram of the second comparison group of the present invention.

[0027] Fig.10 3 is a distortion curve diagram of the second comparison group of the present invention.

[0028] Fig.11 Schematic diagram of illumination of the second comparison group of the present invention.

[0029] Fig.12 It is the MTF curve diagram of the third comparison group of the present invention.

[0030] Fig.13 3 is a distortion curve diagram of the third comparison group of the present invention.

[0031] Fig.14 Schematic diagram of illumination of the third comparison group of the present invention.

[0032] Fig.15 4 is the MTF curve diagram of the fourth comparison group of the present invention.

[0033] Fig.16 3 is a distortion curve diagram of the fourth comparison group of the present invention.

[0034] Fig.17 Schematic diagram of illumination of the fourth comparison group of the present invention.

[0035] Fig.18 It is the MTF curve diagram of the fifth comparison group of the present invention.

[0036] Fig.19 3 is a distortion curve diagram of the fifth comparison group of the present invention.

[0037] Fig. 20 Schematic diagram of illumination of the fifth comparison group of the present invention.

[0038] Fig.21 3 is an MTF curve diagram of the sixth comparison group of the present invention.

[0039] Fig. 22 3 is a distortion curve diagram of the sixth comparison group of the present invention.

[0040] Fig.23 Schematic diagram of illumination of the sixth comparison group of the present invention.

[0041] Description of reference numerals: 1. Aperture; 2. First lens; 3. Second lens; 4. Third lens; 5. Fourth lens; 6. Fifth lens; 7. Sixth lens; 8. Seventh lens; 9. First cemented lens; 91. First sub-lens; 92. Second sub-lens; 10. Second cemented lens; 101. Third sub-lens; 102. Fourth sub-lens; 103. Fifth sub-lens; 104. Sixth sub-lens; 105. Seventh sub-lens; 11. Third cemented lens; 111. Eighth sub-lens; 112. Ninth sub-lens; 12. Fourth cemented lens; 121. Tenth sub-lens; 122. Eleventh sub-lens; 13. Fifth cemented lens; 131. Twelfth sub-lens; 132. Thirteenth sub-lens; 14. Image plane. DETAILED DESCRIPTION

[0042] The technical solution of the present invention will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention. It should be noted that the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", etc. is based on the orientation or position relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] like Figure 1 , Figure 2 As shown, the present invention provides a large image plane high-resolution near-eye detection lens, comprising an aperture, a first lens module, a second lens module, a third lens module and an image plane, which are arranged in sequence from the object side to the image side; the aperture is used to transmit light; the first lens module is used to receive and transmit light passing through the aperture, and the first lens module is also used to compress the angle; the second lens module is used to receive and transmit light passing through the first lens module, and the second lens module is also used to compress the aperture and expand the field of view angle; the third lens module is used to receive and transmit light passing through the second lens module, and the third lens module is also used to converge the light passing through it and converge the light on the image plane; the image plane is used to perform imaging.

[0044] The field of view angle of the near-eye detection lens provided by the present invention is in the range of: 120° 130°, total focal length f of near-eye detection lens: , object distance is greater than or equal to 0.25m, the aspect ratio of the effective photosensitive area is 1:1, the entrance pupil diameter is 3.6mm, the aperture number is 2.78, and the temperature range of the operating environment is 22℃ 28℃, the humidity range of the use environment is 25% 85%, the air pressure range of the operating environment is 86kPa 106kPa. Focal length of the first lens module Total focal length The ratio is: ; Focal length of the second lens module Total focal length Ratio of: ; Focal length of the third lens module Total focal length The ratio is: .

[0045] The first lens module includes a plurality of single lenses and a first cemented lens, wherein the plurality of single lenses are respectively distributed on both sides of the first cemented lens, wherein at least two single lenses are arranged near the object side of the first cemented lens, and at least one single lens is arranged near the image side of the first cemented lens. At least a first lens and a second lens are arranged near the object side of the first cemented lens, wherein the light receiving surface of the first lens is concave, and the light emitting surface of the first lens is convex, and the light receiving surface of the second lens is concave, and the light emitting surface of the second lens is convex; at least a third lens is arranged near the image side of the first cemented lens, and both the light receiving surface and the light emitting surface of the third lens are convex. The first cemented lens includes a first sub-lens and a second sub-lens, wherein both the light receiving surface and the light emitting surface of the first sub-lens are concave, and both the light receiving surface and the light emitting surface of the second sub-lens are convex.

[0046] Focal length of the first lens for: , the focal length of the second lens for: ; The focal length of the first sub-lens for: , the focal length of the second sub-lens for: .

[0047] The second lens module includes a plurality of single lenses and a second cemented lens, and the plurality of single lenses are evenly distributed on both sides of the second cemented lens. At least one single lens is arranged near the object side and near the image side of the second cemented lens. At least a fourth lens is arranged near the object side of the second cemented lens, and the light receiving surface of the fourth lens is a convex surface, and the light emitting surface of the fourth lens is a plane; at least a fifth lens is arranged near the image side of the second cemented lens, and the light receiving surface of the fifth lens is a convex surface, and the light emitting surface of the fifth lens is a plane. The second cemented lens includes a third sub-lens, a fourth sub-lens, a fifth sub-lens, a sixth sub-lens and a seventh sub-lens, and the light receiving surface and light emitting surface of the third sub-lens are both convex surfaces, the light receiving surface and light emitting surface of the fourth sub-lens are concave and plane, respectively, the light receiving surface and light emitting surface of the fifth sub-lens are both planes, the light receiving surface and light emitting surface of the sixth sub-lens are both planes, and the light receiving surface and light emitting surface of the seventh sub-lens are planes and convex, respectively.

[0048] Focal length of the fourth lens for: , the focal length of the fifth lens for: , the focal length of the third sub-lens for: , the focal length of the fourth sub-lens for: , the focal length of the fifth sub-lens for: , the focal length of the sixth sub-lens for: , the focal length of the seventh sub-lens for: .

[0049] The third lens module includes a third cemented lens, a fourth cemented lens, a fifth cemented lens and at least two single lenses, and the third cemented lens, the third cemented lens, the third cemented lens and the two single lenses are arranged in sequence from the object side to the image side. The third lens module is provided with at least a sixth lens and a seventh lens, and the light receiving surface and the light emitting surface of the sixth lens are convex and concave respectively, and the light receiving surface and the light emitting surface of the seventh lens are convex and flat respectively. The third cemented lens includes an eighth sub-lens and a ninth sub-lens, and the light receiving surface and the light emitting surface of the eighth sub-lens are both concave, and the light receiving surface and the light emitting surface of the ninth sub-lens are both convex. The fourth cemented lens includes a tenth sub-lens and an eleventh sub-lens, and the light receiving surface and the light emitting surface of the tenth sub-lens are both convex, and the light receiving surface and the light emitting surface of the eleventh sub-lens are both flat. The fifth cemented lens includes a twelfth sub-lens and a thirteenth sub-lens, and the light receiving surface and the light emitting surface of the twelfth sub-lens are respectively flat and convex, and the light receiving surface and the light emitting surface of the thirteenth sub-lens are respectively flat and convex.

[0050] Focal length of the sixth lens for: , the focal length of the seventh lens for: ; The focal length of the eighth sub-lens for: , the focal length of the ninth sub-lens for: , the focal length of the tenth lens for: , the focal length of the eleventh sub-lens for: , the focal length of the twelfth sub-lens for: , the focal length of the thirteenth lens for: .

[0051] The optical parameters of the present invention are shown in Table 1 below: Table 1

[0052] Set a first comparison group and set the focal length of the first lens module of the first comparison group Total focal length The ratio of the focal length of the second lens module Total focal length The ratio of the focal length of the third lens module Total focal length The ratios are: -2.8, -12.4676, -5.01276, and the obtained MTF curve, distortion graph and comparison graph are Figure 6 , Figure 7 , Figure 8 .

[0053] Set a second comparison group and set the focal length of the first lens module of the second comparison group Total focal length The ratio of the focal length of the second lens module Total focal length The ratio of the focal length of the third lens module Total focal length The ratios are: -2.7, -12.4676, -5.01276, and the obtained MTF curve, distortion graph and comparison graph are Fig. 9 , Fig.10 , Fig.11 .

[0054] Set a third comparison group and set the focal length of the first lens module of the third comparison group Total focal length The ratio of the focal length of the second lens module Total focal length The ratio of the focal length of the third lens module Total focal length The ratios are: -2.75759, -12.7, -5.01276, and the obtained MTF curve, distortion graph and comparison graph are Fig.12 , Fig.13 , Fig.14 .

[0055] Set a fourth comparison group and set the focal length of the first lens module of the fourth comparison group Total focal length The ratio of the focal length of the second lens module Total focal length The ratio of the focal length of the third lens module Total focal length The ratios are: -2.75759, -12.4, -5.01276, and the obtained MTF curve, distortion graph and comparison graph are Fig.15 , Fig.16 , Fig.17 .

[0056] Set a fifth comparison group and set the focal length of the first lens module of the fifth comparison group Total focal length The ratio of the focal length of the second lens module Total focal length The ratio of the focal length of the third lens module Total focal length The ratios are: -2.75759, -12.4676, -5.2, and the obtained MTF curve, distortion graph and comparison graph are Fig.18 , Fig.19 , Fig. 20 .

[0057] Set the sixth comparison group and set the focal length of the first lens module of the sixth comparison group Total focal length The ratio of the focal length of the second lens module Total focal length The ratio of the focal length of the third lens module Total focal length The ratios are: -2.75759, -12.4676, -4.95, and the obtained MTF curve, distortion graph and comparison graph are Fig.21 , Fig. 22 , Fig.23 .

[0058] Figure 3 , Figure 4 , Figure 5 are respectively the focal lengths of the first lens module of the present invention Total focal length The ratio of the focal length of the second lens module Total focal length The ratio of the focal length of the third lens module Total focal length The ratios of are: MTF curves, distortion diagrams and relative illumination diagrams when -2.75759, -12.4676 and -5.01276 respectively. Combined with the MTF curves, distortion diagrams and relative illumination diagrams of the first comparison group to the sixth comparison group, the MTF of the near-eye detection lens provided by the present invention can reach more than 0.22 at a field of view of 125°, while taking into account that the relative illumination of the field of view within 80° reaches more than 0.6. According to the MTF curve, in the case of 144 line pairs (corresponding to a camera with 3.45um pixels), the 125° field of view can still have an MTF value of 0.1, which can meet the normal imaging indicators of conventional cameras; for cameras with large pixels (5.5um pixels, corresponding to 90 line pairs), the minimum value of MTF is close to 0.5, and the resolution fully meets the image processing requirements. The lens has good imaging uniformity and high resolution, and meets the requirements of large field of view and large image plane.

[0059] The focal length of the first lens module Total focal length The ratio is set to , the focal length of the second lens module Total focal length The ratio is set to , the focal length of the third lens module Total focal length The ratio is set to , established through machine learning algorithms , , The relationship between .

[0060] An MTF generation unit is established in the machine learning algorithm. The MTF generation unit uses the existing MTF curve generation software. The input of the machine learning algorithm is f, , , The specific value of f is set, and the input is restricted. The restriction range of f is: , The restrictions are: ; The restrictions are: ; The restrictions are: ; Randomly input f within the limit, , , , generate an MTF curve, and select the f when the MTF is greater than or equal to 0.22 at a 125° field of view. , , .

[0061] , , , satisfying the following formula: ; ; ; ; In the above formula, represents the focal length of the i-th first lens module obtained through machine learning screening, Represents the total number of focal lengths of all first lens modules screened by machine learning, represents the focal length of the jth second lens module obtained through machine learning screening, Represents the total number of focal lengths of all second lens modules screened by machine learning, represents the focal length of the kth third lens module obtained through machine learning screening, Indicates the total number of focal lengths of all third lens modules screened by machine learning; represents the correction coefficient of the first lens module, represents the correction coefficient of the second lens module, Indicates the correction coefficient of the third lens module.

[0062] Through machine learning algorithms , , Make adjustments, establish , , The relationship can further ensure that the resolution fully meets the image processing requirements. The lens has good imaging uniformity and high resolution, while meeting the requirements of large field of view and large image surface.

[0063] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A large image surface high resolution near-eye detection lens, characterized in that: It comprises an aperture, a first lens module, a second lens module, a third lens module and an image plane which are arranged in sequence from the object side to the image side; the aperture is used to transmit light; the first lens module is used to receive and transmit light passing through the aperture, and the first lens module is also used to compress the angle; the second lens module is used to receive and transmit light passing through the first lens module, and the second lens module is also used to compress the aperture and expand the field of view; the third lens module is used to receive and transmit light passing through the second lens module, and the third lens module is also used to converge the light passing through it and converge the light on the image plane; the image plane is used to perform imaging; The focal length of the first lens module Total focal length The ratio is: ; The focal length of the second lens module Total focal length Ratio of: ; The focal length of the third lens module Total focal length The ratio is: .

2. The large image plane high resolution near-eye detection lens according to claim 1, characterized in that: The first lens module includes a plurality of single lenses and a first cemented lens, and the plurality of single lenses are respectively distributed on both sides of the first cemented lens; The first cemented lens is provided with at least a first lens and a second lens near the object side, the light receiving surface of the first lens is a concave surface, the light emitting surface of the first lens is a convex surface, the light receiving surface of the second lens is a concave surface, and the light emitting surface of the second lens is a convex surface; the first cemented lens is provided with at least a third lens near the image side, the light receiving surface and the light emitting surface of the third lens are both convex surfaces; The first cemented lens includes a first sub-lens and a second sub-lens, the light receiving surface and the light emitting surface of the first sub-lens are both concave surfaces, and the light receiving surface and the light emitting surface of the second sub-lens are both convex surfaces.

3. The large image plane high resolution near-eye detection lens according to claim 2, characterized in that: The focal length of the first lens for: , the focal length of the second lens for: ; The focal length of the first sub-lens for: , the focal length of the second sub-lens for: .

4. The large image plane high resolution near-eye detection lens according to claim 1, characterized in that: The second lens module comprises a plurality of single lenses and a second cemented lens, and the plurality of single lenses are evenly distributed on both sides of the second cemented lens; The second cemented lens is provided with at least a fourth lens near the object side, the light receiving surface of the fourth lens is a convex surface, and the light emitting surface of the fourth lens is a plane; the second cemented lens is provided with at least a fifth lens near the image side, the light receiving surface of the fifth lens is a convex surface, and the light emitting surface of the fifth lens is a plane; The second cemented lens includes a third sub-lens, a fourth sub-lens, a fifth sub-lens, a sixth sub-lens and a seventh sub-lens, the light receiving surface and the light emitting surface of the third sub-lens are both convex surfaces, the light receiving surface and the light emitting surface of the fourth sub-lens are respectively concave and flat, the light receiving surface and the light emitting surface of the fifth sub-lens are both flat, the light receiving surface and the light emitting surface of the sixth sub-lens are both flat, and the light receiving surface and the light emitting surface of the seventh sub-lens are respectively flat and convex.

5. The large image plane high resolution near-eye detection lens according to claim 4, characterized in that: The focal length of the fourth lens for: , the focal length of the fifth lens for: , the focal length of the third sub-lens for: , the focal length of the fourth sub-lens for: , the focal length of the fifth sub-lens for: , the focal length of the sixth sub-lens for: , the focal length of the seventh sub-lens for: .

6. The large image plane high resolution near-eye detection lens according to claim 1, characterized in that: The third lens module comprises a third cemented lens, a fourth cemented lens, a fifth cemented lens and at least two single lenses, wherein the third cemented lens, the third cemented lens, the third cemented lens and the two single lenses are arranged in sequence from the object side to the image side respectively; The third lens module is provided with at least a sixth lens and a seventh lens, the light receiving surface and the light emitting surface of the sixth lens are convex and concave respectively, and the light receiving surface and the light emitting surface of the seventh lens are convex and flat respectively.

7. The large image plane high resolution near-eye detection lens according to claim 6, characterized in that: The third cemented lens includes an eighth sub-lens and a ninth sub-lens, the light receiving surface and the light emitting surface of the eighth sub-lens are both concave surfaces, and the light receiving surface and the light emitting surface of the ninth sub-lens are both convex surfaces; the fourth cemented lens includes a tenth sub-lens and an eleventh sub-lens, the light receiving surface and the light emitting surface of the tenth sub-lens are both convex surfaces, and the light receiving surface and the light emitting surface of the eleventh sub-lens are both flat surfaces; the fifth cemented lens includes a twelfth sub-lens and a thirteenth sub-lens, the light receiving surface and the light emitting surface of the twelfth sub-lens are respectively a flat surface and a convex surface, and the light receiving surface and the light emitting surface of the thirteenth sub-lens are respectively a flat surface and a convex surface.

8. The large image plane high resolution near-eye detection lens according to claim 7, characterized in that: The focal length of the sixth lens for: , the focal length of the seventh lens for: ; The focal length of the eighth sub-lens for: , the focal length of the ninth sub-lens for: , the focal length of the tenth sub-lens for: , the focal length of the eleventh sub-lens for: , the focal length of the twelfth sub-lens for: , the focal length of the thirteenth sub-lens for: .

9. The large image plane high resolution near-eye detection lens according to claim 1, characterized in that: The field of view angle range of the near-eye detection lens is: 120° 130°, the range of total focal length f is: , the object distance is greater than or equal to 0.25m, and the aspect ratio of the effective photosensitive area is 1:

1.

10. The large image plane high resolution near-eye detection lens according to claim 1, characterized in that: The focal length of the first lens module Total focal length The ratio is set to , the focal length of the second lens module Total focal length The ratio is set to , the focal length of the third lens module Total focal length The ratio is set to , , , Satisfy the following formula: ； ； ； ； In the above formula, represents the focal length of the i-th first lens module obtained through machine learning screening, Represents the total number of focal lengths of all first lens modules screened by machine learning, represents the focal length of the jth second lens module obtained through machine learning screening, Represents the total number of focal lengths of all second lens modules screened by machine learning, represents the focal length of the kth third lens module obtained through machine learning screening, Indicates the total number of focal lengths of all third lens modules screened by machine learning; represents the correction coefficient of the first lens module, represents the correction coefficient of the second lens module, Indicates the correction coefficient of the third lens module.

Images