Artificial eye optical system

Abstract

The utility model relates to an artificial eye optical system. The artificial eye optical system comprises an optical acquisition assembly and a signal sensing assembly, the optical acquisition assembly comprises a corneal lens group, an aperture diaphragm and a conventional lens group which are sequentially arranged from an object side to an image side; external light is transmitted to the signal sensing assembly through the optical acquisition assembly; the corneal lens group has negative focal power; the conventional lens group comprises a first lens group, a second lens group, a third lens group, a focusing lens group and a spectroscope group; the first lens group, the second lens group and the third lens group all have positive focal power; the focusing lens group comprises a liquid lens and is used for adjusting focal power; the spectroscope group comprises a beam splitter prism and is used for carrying out beam splitting treatment on incident light; the signal sensing assembly is arranged on a light path formed by the optical acquisition assembly and is used for receiving light transmitted by the optical acquisition assembly; on the basis, not only can the physiological structure of human eyes be simulated, but also the human eyes can be simulated to comprehensively perceive various information in a visual field range, and comprehensive measurement of the display quality of the XR equipment is realized.

Description

Technical Field

[0001] The present application relates to the field of optical imaging technology, and in particular to an artificial eye optical system. Background Art

[0002] As the use of extended reality (XR) devices in gaming, military, education, transportation, and medicine grows rapidly, the demand for measuring the display quality of XR devices is also increasing. Usually, people hope to use an objective method to evaluate the intuitive perception of the human eye, so the brightness, color, image, and event that the human eye can perceive are all used as important evaluation criteria for measuring the display quality of XR devices.

[0003] In the prior art, based on an optical imaging system, a front aperture is used to simulate the pupil of the human eye, and the exit pupil of the XR device to be measured is matched with the front aperture to achieve measurement of the image displayed by the XR device; however, in actual applications, the optical imaging system only has an imaging function, and the entire optical imaging system has a narrow space with only one measurement light path, so it is impossible to simultaneously access related sensor components for brightness and chromaticity measurement, which results in the measurement of the display quality of the XR device being one-sided and local; it can be seen that the optical imaging system in the prior art has limitations and cannot comprehensively measure the display quality of the XR device.

[0004] There is currently no effective solution to the problem that the optical imaging system in the existing technology has limitations and cannot comprehensively measure the display quality of XR devices. Utility Model Content

[0005] Based on this, it is necessary to provide an artificial eye optical system to address the above technical problems.

[0006] The present application provides an artificial eye optical system, which includes an optical collection component and a signal sensing component;

[0007] The optical collection component includes a cornea lens group, an aperture stop and a conventional lens group arranged in sequence from the object side to the image side; the external light is transmitted to the signal sensing component through the optical collection component; the cornea lens group has a negative optical focal length; the conventional lens group includes a first lens group, a second lens group, a third lens group, a focusing lens group and a beam splitter group; the first lens group, the second lens group and the third lens group all have positive optical focal length; the first lens group includes a second lens, a third lens and a fourth lens; the second lens group includes a fifth lens, a sixth lens and a seventh lens; the fifth lens and the sixth lens constitute a cemented lens group; the third lens group includes an eighth lens; the focusing lens group includes a liquid lens for adjusting the optical focal length; the beam splitter group includes a beam splitter prism for beam splitting incident light;

[0008] The signal sensing component is disposed on the optical path formed by the optical collection component, and is used to receive the light transmitted by the optical collection component.

[0009] In one embodiment, the corneal lens assembly includes a first lens; the first lens has negative optical power, and the object side surface of the first lens is convex, and the image side surface is concave.

[0010] In one embodiment, the signal sensing component includes an image event perception sensor and a spectrometer;

[0011] After passing through the optical collection component, the external light forms a first split light and a second split light;

[0012] The image event sensing sensor is disposed on the optical path of the first split light beam, and is used to receive the first split light beam;

[0013] The spectrometer is arranged on the optical path of the second split light beam, and is used for receiving the second split light beam.

[0014] In one of the embodiments, the image event perception sensor is an APS and DVS two-in-one sensor.

[0015] In one embodiment, the optical collection assembly further includes: a field stop, an optical fiber coupling interface, and an optical fiber;

[0016] The field diaphragm and the fiber coupling interface are sequentially arranged along the propagation direction of the second spectral light; the fiber coupling interface is connected to the spectrometer via the optical fiber; the second spectral light is sequentially transmitted to the spectrometer via the field diaphragm, the light coupling interface and the optical fiber.

[0017] In one of the embodiments, the optical collection assembly further includes: a converging lens group;

[0018] The converging mirror group is arranged between the converging mirror group and the field aperture along the propagation direction of the second split light; the second split light is sequentially transmitted to the spectrometer through the converging mirror group, the field aperture, the light coupling interface and the optical fiber.

[0019] In one embodiment, the optical collection assembly sequentially arranges the cornea lens group, the aperture stop, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the focusing lens group, the eighth lens and the beam splitter group in order from the object side to the image side;

[0020] The artificial eye optical system satisfies TTL / ImgH≤6.6; wherein TTL is the distance on the optical axis from the lens surface closest to the object side of the optical acquisition component to the imaging surface of the optical acquisition component, and ImgH is the image plane height at the full field of view.

[0021] In one embodiment, the second lens has negative optical power, and the object side surface of the second lens is concave, and the image side surface is concave;

[0022] The third lens has positive power, and the object side surface and image side surface of the third lens are convex;

[0023] The fourth lens has positive refractive power, and the object side surface of the fourth lens is convex, and the image side surface is convex;

[0024] The fifth lens has negative optical power, and the object side surface of the fifth lens is concave, and the image side surface is convex;

[0025] The sixth lens has positive refractive power, and the object side surface of the sixth lens is concave, and the image side surface is convex;

[0026] The seventh lens is a double cemented lens; the double cemented lens comprises a convex-concave lens and a biconvex lens that are cemented in sequence; the convex-concave lens and the biconvex lens both have negative optical power;

[0027] The eighth lens has positive refractive power, and the object-side surface of the eighth lens is convex, and the image-side surface is concave.

[0028] In one embodiment, the optical collection assembly sequentially arranges the cornea lens group, the aperture stop, the second lens, the third lens, the fourth lens, the beam splitter group, the fifth lens, the sixth lens, the seventh lens, the focusing lens group and the eighth lens in order from the object side to the image side;

[0029] The artificial eye optical system satisfies TTL / ImgH≤5.9; wherein TTL is the distance on the optical axis from the lens surface closest to the object side of the optical acquisition component to the imaging surface of the optical acquisition component, and ImgH is the image plane height at the full field of view.

[0030] In one embodiment, the second lens has positive power, and the object side surface of the second lens is concave, and the image side surface is concave;

[0031] The third lens has negative optical power, and the object side surface of the third lens is concave, and the image side surface is convex;

[0032] The fourth lens has positive refractive power, and the object side surface of the fourth lens is convex, and the image side surface is convex;

[0033] The fifth lens has negative optical power, and the object side surface and image side surface of the fifth lens are concave;

[0034] The sixth lens has negative optical power, and the object side surface of the sixth lens is convex, and the image side surface is convex;

[0035] The seventh lens has positive power, and the object side surface and the image side surface of the seventh lens are convex;

[0036] The eighth lens has positive refractive power, and the object-side surface and the image-side surface of the eighth lens are convex.

[0037] The above-mentioned artificial eye optical system includes an optical collection component and a signal sensing component; wherein the optical collection component includes a corneal lens group, an aperture stop and a conventional lens group arranged in sequence from the object side to the image side; the external light is transmitted to the signal sensing component through the optical collection component; wherein the corneal lens group has a negative optical focal length; the conventional lens group includes a first lens group, a second lens group, a third lens group, a focusing lens group and a beam splitter group; the first lens group, the second lens group and the third lens group all have positive optical focal length; the first lens group includes a second lens, a third lens and a fourth lens; the second lens group includes a fifth lens, a sixth lens and a seventh lens; the fifth lens and the sixth lens constitute a cemented lens group ; The third mirror group includes an eighth lens; the focusing mirror group includes a liquid lens for adjusting the optical focal length; the beam splitter group includes a beam splitter prism for performing beam splitting processing on the incident light; the signal sensing component is arranged on the optical path formed by the optical acquisition component, and is used to receive the light transmitted by the optical acquisition component; based on this, the artificial eye optical system of the present application can not only imitate the physiological structure of the human eye, but also use the optical acquisition component to divide the incident light into multiple light paths and transmit them to the signal sensing component, and measure the multiple light paths separately based on the signal sensing component to simulate the human eye's comprehensive perception of multiple information within the field of view, thereby realizing a comprehensive measurement of the display quality of the XR device. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings described herein are used to provide a further understanding of the present application. They constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0039] Figure 1 is a schematic block diagram of an artificial eye optical system in one embodiment;

[0040] Figure 2 is a schematic structural diagram of an artificial eye optical system in one embodiment;

[0041] Figure 3 It is a schematic structural diagram of the optical system of the artificial eye in the first specific embodiment;

[0042] Figure 4 is a schematic diagram of the optical path of the artificial eye optical system in the first specific embodiment;

[0043] Figure 5 The MTF curve and the field curvature distortion curve of the artificial eye optical system at a diopter of 4D in the first specific embodiment;

[0044] Figure 6 The MTF curve and the field curvature distortion curve of the artificial eye optical system in the first specific embodiment under 3D diopter;

[0045] Figure 7 The MTF curve and the field curvature distortion curve of the artificial eye optical system in the first specific embodiment at a diopter of 2D;

[0046] Figure 8 The MTF curve and the field curvature distortion curve of the artificial eye optical system at a diopter of 1D in the first specific embodiment;

[0047] Fig. 9 1 is an MTF curve diagram and a field curvature distortion curve diagram of the artificial eye optical system at a diopter of 0D in the first specific embodiment;

[0048] Fig.10 is a schematic structural diagram of an artificial eye optical system in a second specific embodiment;

[0049] Fig.11 is a schematic diagram of the optical path of the artificial eye optical system in the second specific embodiment;

[0050] Fig.12 The MTF curve and the field curvature distortion curve of the artificial eye optical system at a diopter of 6D in the second specific embodiment;

[0051] Fig.13 The MTF curve and the field curvature distortion curve of the artificial eye optical system at a diopter of 5D in the second specific embodiment;

[0052] Fig.14 The MTF curve and the field curvature distortion curve of the artificial eye optical system in the second specific embodiment under the diopter 3D;

[0053] Fig.15 The MTF curve and the field curvature distortion curve of the artificial eye optical system at a diopter of 1D in the second specific embodiment;

[0054] Fig.16 1 is an MTF curve diagram and a field curvature distortion curve diagram of the artificial eye optical system at a diopter of 0D in the second specific embodiment.

[0055] Description of reference numerals:

[0056] 1. Optical collection component; 2. Signal sensing component; 3. Housing; 10. Corneal lens group; 20. Aperture diaphragm; 30. Conventional lens group; 40. Image event sensing sensor; 50. Spectrometer; 60. Field of view diaphragm; 70. Light coupling interface; 80. Optical fiber; 90. Converging lens group; 31. First lens group; 32. Second lens group; 33. Third lens group; 34. Focusing lens group; 35. Beam splitter group; 11. First lens; 311. Second lens; 312. Third lens; 313. Fourth lens; 321. Fifth lens; 322. Sixth lens; 323. Seventh lens; 331. Eighth lens; 341. Liquid lens; 351. Beam splitter prism; 401. Protective glass. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0058] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the general meaning understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the", "these" and the like in this application do not represent quantitative restrictions, and they can be singular or plural. The terms "include", "comprise", "have" and any variants thereof involved in this application are intended to cover non-exclusive inclusions; for example, a process, method and system, product or device comprising a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether directly or indirectly. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. Usually, the character " / " indicates that the objects associated with each other are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0059] In one embodiment, Figure 1 As shown, Figure 1 It is a schematic block diagram of an artificial eye optical system in one embodiment; the artificial eye optical system includes an optical acquisition component 1 and a signal sensing component 2;

[0060] The optical collection component 1 includes a cornea lens group 10, an aperture stop 20 and a conventional lens group 30 arranged in sequence from the object side to the image side; external light is transmitted to the signal sensing component 2 through the optical collection component 1; the cornea lens group 10 has a negative optical focal length; the conventional lens group 30 includes a first lens group, a second lens group, a third lens group, a focusing lens group and a beam splitter group; the first lens group, the second lens group and the third lens group all have positive optical focal length; the first lens group includes a second lens, a third lens and a fourth lens; the second lens group includes a fifth lens, a sixth lens and a seventh lens; the fifth lens and the sixth lens constitute a cemented lens group; the third lens group includes an eighth lens; the focusing lens group includes a liquid lens for adjusting the optical focal length; the beam splitter group includes a beam splitter prism for beam splitting incident light.

[0061] The signal sensing component 2 is disposed on the optical path formed by the optical collection component 1 , and is used for receiving the light transmitted by the optical collection component 1 .

[0062] Among them, the corneal lens assembly 10 is used to simulate the corneal structure of the human eye; the curvature radius of the corneal lens assembly 10 is consistent with the cornea of ​​the human eye, and is coated with an anti-infrared film system; the aperture stop 20 includes a light-transmitting part and a light-shielding part; the light-transmitting part is used to simulate the pupil; the light-shielding part is used to simulate the iris; optionally, the light-shielding part adopts a semi-reflective matte finish to simulate the color of the human eye, such as black, gray, brown or blue. It can be understood that by selecting corneal lens assemblies 10 with different curvatures and aperture stops 20 with different textures and colors, different types of human eyes can be simulated, such as the elderly, children, patients, etc.; by selecting aperture stops 20 of different sizes, the physiological function of the human pupil when it changes within the range of 2 to 8 mm under different external light can be simulated. It should be noted that the corneal lens group 10, the aperture stop 20 and the conventional lens group 30 are arranged in sequence from the object side to the image side. When external light enters the optical system of the artificial eye, it will first pass through the corneal lens group 10 and the aperture stop 20, and then propagate to the conventional lens group 30, thereby realizing the advance of the aperture stop 20, which is beneficial to the structural order and physical parameters of the bionic human cornea and pupil.

[0063] Among them, the conventional lens group 30 includes a first lens group, a second lens group, a third lens group, a focusing lens group and a beam splitter group; it should be noted that the arrangement order of the first lens group, the second lens group, the third lens group, the focusing lens group and the beam splitter group can be set according to actual practical needs, and no specific limitation is made here; the first lens group, the second lens group and the third lens group all have positive focal power; wherein, the first lens group includes a second lens, a third lens and a fourth lens; the second lens group includes a fifth lens, a sixth lens and a seventh lens; the fifth lens and the sixth lens constitute a cemented lens group; wherein the fifth lens and the sixth lens are cemented in sequence from the object side to the image side; the third lens group includes an eighth lens; it should be noted that the arrangement order of the second lens, the third lens and the fourth lens can be set according to actual practical needs, and no specific limitation is made here; the arrangement order of the fifth lens, the sixth lens and the seventh lens can be set according to actual practical needs, and no specific limitation is made here.

[0064] The focusing lens group includes a liquid lens; the liquid lens has two kinds of electronic liquids, namely a liquid with a positive charge and a liquid with a negative charge. By controlling the direction and intensity of the electric field, automatic focusing can be achieved within the diopter range of 0 to 4D (i.e., the working distance corresponds to Infinity to 250mm), so that the resolution of the entire artificial eye optical system remains matched with 20 / 20 human visual acuity. The spectroscope group includes a spectroscopic prism for spectroscopically processing the incident light to form a first spectroscopic light and a second spectroscopic light; optionally, the spectroscope group may also include a semi-transparent and semi-reflective mirror and a beam splitter, which are not specifically limited here; it should be noted that the first spectroscopic light is transmitted to the signal sensing component 2, and can be used to perceive static images and motion events within the field of view; the second spectroscopic light is transmitted to the signal sensing component 2, and can be used to measure the brightness and chromaticity of the scene within the field of view.

[0065] Among them, the signal sensing component 2 is arranged on the optical path formed by the optical collection component 1, and is used to receive the light transmitted by the optical collection component 1, including the first split light and the second split light; based on the first split light and the second split light, the signal sensing component 2 can simultaneously realize the perception of static images and motion events within the field of view, and the measurement of scene brightness and chromaticity.

[0066] It should be noted that the artificial eye optical system also includes a shell; the shell is used to support the entire artificial eye optical system; the diameter of the front hemisphere of the shell is consistent with the diameter of the human eye sclera, and its surface is coated with an anti-infrared film system.

[0067] In this embodiment, based on the corneal lens group 10, the aperture stop 20 and the conventional lens group 30 arranged in sequence from the object side to the image side, the structural order and physical parameters of the human cornea and pupil can be simulated; based on the focusing lens group, automatic focusing within the refractive range of 0 to 4D can be achieved, so that the resolution of the entire artificial eye optical system remains matched with 20 / 20 human visual acuity; based on the spectroscope group, the incident light can be spectroscopically processed to form a first spectroscopic light and a second spectroscopic light; based on the first spectroscopic light and the second spectroscopic light, the signal sensing component 2 can simultaneously realize the perception of static images and motion events within the field of view and the measurement of scene brightness and chromaticity; based on this, the artificial eye optical system can be used to achieve objective and comprehensive measurement of the display quality of XR devices.

[0068] In one embodiment, the cornea lens assembly includes a first lens; the first lens has negative optical power, and the object side surface of the first lens is convex, and the image side surface is concave.

[0069] Among them, the first lens is an aspherical lens structure with negative optical power, and the object side surface of the first lens is convex, and the image side surface is concave; optionally, the focal length range of the first lens is -10mm to -15mm; based on this, the corneal structure of different types of human eyes can be simulated.

[0070] In one embodiment, see Figure 2 , the signal sensing component 2 includes an image event perception sensor 40 and a spectrometer 50;

[0071] After passing through the optical collection component 1, the external light forms a first split light and a second split light;

[0072] The image event sensing sensor 40 is disposed on the optical path of the first split light beam, and is used to receive the first split light beam;

[0073] The spectrometer 50 is disposed on the optical path of the second split light beam, and is used for receiving the second split light beam.

[0074] Among them, the image event perception sensor 40 is used to receive the first spectroscopic light and realize the perception of static images and motion events within the field of view based on the first spectroscopic light; the spectrometer 50 is used to receive the second spectroscopic light and realize the measurement of scene brightness and chromaticity within the field of view based on the second spectroscopic light.

[0075] It should be noted that the incident light will be divided into two paths of light after passing through the optical collection component 1, wherein the transmitted light is the first split light, and the reflected light is the second split light.

[0076] Preferably, the image event sensing sensor 40 is an APS and DVS two-in-one sensor.

[0077] Among them, the APS and DVS two-in-one sensor is a new type of visual sensor that integrates imaging sensors and event perception sensors. The APS and DVS two-in-one sensor can detect motion events while realizing visual imaging, and can output image event information, namely image data and event information, by frame.

[0078] Preferably, the optical collection assembly 2 further includes: a field aperture 60, an optical fiber coupling interface 70 and an optical fiber 80;

[0079] A field aperture 60 and a fiber coupling interface 70 are sequentially arranged along the propagation direction of the second split light; the fiber coupling interface 70 is connected to the spectrometer 50 via the optical fiber 80; the second split light is sequentially transmitted to the spectrometer 50 via the field aperture 60, the light coupling interface 70 and the optical fiber 80.

[0080] The field aperture 60 is used to intercept part of the second split light, so that the remaining light is coupled into the optical fiber 80 through the optical fiber coupling interface 70 and propagated to the spectrometer 50 through the optical fiber 80 .

[0081] Preferably, the optical collection assembly 1 further comprises: a converging lens group ( Figure 2 not marked in );

[0082] The converging lens group is disposed between the beam splitter group and the field stop 60 along the propagation direction of the second beam splitting light; the second beam splitting light is sequentially transmitted to the spectrometer 50 via the converging lens group, the field stop 60, the light coupling interface 70 and the optical fiber 80.

[0083] The converging lens assembly is used to deflect the second split light before it propagates to the field stop 60 , so as to ensure that sufficient light energy is coupled into the optical fiber 80 .

[0084] In this embodiment, based on the image event perception sensor 40, it is possible to perceive static images and motion events within the field of view; based on the spectrometer 50, it is possible to measure the brightness and chromaticity of the scene within the field of view; based on the field of view aperture 60, it is possible to improve the stray light in the second split light, laying a foundation for improving the accuracy of the measurement results of the spectrometer 50; based on the converging lens group, it is possible to avoid the problem that the angle of the second split light, that is, the outgoing light of the reflected light, is too large, thereby affecting the accuracy of the brightness and chromaticity measurement results.

[0085] In a specific embodiment, see Figure 3 and Figure 4The optical collection assembly 1 sequentially arranges a cornea lens group 10, an aperture stop 20, a second lens 311, a third lens 312, a fourth lens 313, a fifth lens 321, a sixth lens 322, a seventh lens 323, a focusing lens group 34, an eighth lens 331 and a beam splitter group 35 in order from the object side to the image side;

[0086] The optical system of the artificial eye satisfies TTL / ImgH≤6.6; wherein TTL is the distance on the optical axis from the lens surface of the optical collection component 1 closest to the object side to the imaging surface of the optical collection component 1, and ImgH is the image plane height at the full field of view.

[0087] Among them, the cornea lens group 10 includes a first lens 11; the first lens group 31 includes a second lens 311, a third lens 312, and a fourth lens 313; the second lens group 32 includes a fifth lens 321, a sixth lens 322, and a seventh lens 323; wherein the fifth lens 321 and the sixth lens 322 constitute a cemented lens group, and the seventh lens 323 is a double cemented lens; the third lens group 33 includes an eighth lens 331; the focusing lens group 34 includes a liquid lens 341; the liquid lens 341 realizes the positive and negative transformation of the optical focal length by electrically adjusting the positive and negative curvature of the surface; the beam splitter group 35 includes a beam splitter prism 351.

[0088] Among them, the artificial eye optical system satisfies TTL / ImgH≤6.6, TTL is the distance from the lens surface of the optical acquisition component 1 closest to the object side, that is, the object side of the first lens 11, to the imaging surface of the optical acquisition component 1 on the optical axis, and the TTL value range is <33mm; ImgH is the image plane height under the full field of view, and the ImgH value range is 4mm to 5mm. Based on this, the total length of the artificial eye optical system can be effectively reduced, which is conducive to the miniaturization of the artificial eye optical system.

[0089] Preferably, the second lens 311 has negative optical power, and the object side surface of the second lens 311 is concave, and the image side surface is concave;

[0090] The third lens 312 has positive refractive power, and the object-side surface and image-side surface of the third lens 312 are convex;

[0091] The fourth lens 313 has positive refractive power, and the object-side surface and the image-side surface of the fourth lens 313 are convex;

[0092] The fifth lens element 321 has negative optical power, and the object side surface of the fifth lens element 321 is concave, and the image side surface is convex;

[0093] The sixth lens 322 has positive refractive power, and the object-side surface of the sixth lens 322 is concave, and the image-side surface is convex;

[0094] The seventh lens 323 is a double cemented lens; the double cemented lens includes a convex-concave lens and a biconvex lens that are cemented in sequence; the convex-concave lens and the biconvex lens both have negative optical power;

[0095] The eighth lens element 331 has positive refractive power, and the object-side surface of the eighth lens element 331 is convex, and the image-side surface is concave.

[0096] Among them, the object side of the convex-concave lens is convex, and the image side is concave; the object side of the biconvex lens is convex, and the image side is convex.

[0097] Preferably, the focal length range of the first lens 11 is -10mm to -15mm; the focal length range of the second lens 311 is -5mm to -10mm; the focal length range of the third lens 312 is 10mm to 15mm; the focal length range of the fourth lens 313 is 10mm to 15mm; the focal length range of the fifth lens 321 is -15mm to -20mm; the focal length range of the sixth lens 322 is 55mm to 60mm; the focal length range of the convex-concave lens is -180mm to -185mm; the focal length range of the bi-convex lens is -60mm to -65mm; the focal length range of the eighth lens 331 is 35mm to 40mm.

[0098] Preferably, the distance range between the image side of the first lens 11 and the aperture stop 20 is 0.9 mm to 2 mm; the distance range between the aperture stop 20 and the object side of the second lens 311 is 0.9 mm to 2 mm; the distance range between the image side of the seventh lens 323 and the object side of the liquid lens 341 is 0.9 mm to 3 mm; the distance range between the image side of the liquid lens 341 and the object side of the eighth lens 331 is 0.9 mm to 3 mm; the distance range between the image side of the eighth lens 331 and the object side of the dichroic prism 351 is 0.9 mm to 3 mm; the distance range between the image side of the dichroic prism 351 and the object side of the protective glass 401 is 0.9 mm to 3 mm. It should be noted that the distance between the protective glass 401 and the image event sensing sensor 40 is 0.045 mm; and the protective glass 401 is the glass that comes with the image event sensing sensor 40; because the protective glass 401 will affect the image quality, system length, etc., the optical parameters corresponding to the protective glass 401 need to be considered when performing optical simulation.

[0099] Furthermore, the artificial eye optical system also satisfies F Number<2.4; wherein F Number is the aperture number and F number of the optical system; F Number is equal to the ratio of focal length to entrance pupil diameter; wherein the focal length value range is less than 9.6mm, and the entrance pupil diameter value range is 2mm~4mm. Based on this, the amount of light entering the artificial eye optical system can be effectively increased, thereby effectively increasing the light energy reaching the image event perception sensor 40 or coupled into the optical fiber 80, and at the same time, the signal-to-noise ratio of the artificial eye optical system can be improved, thereby improving the image quality.

[0100] Furthermore, the artificial eye optical system also meets the requirements of full-depth MTF>0.16 at Nyquist frequency and full-depth MTF>0.46 at 1 / 2Nyquist frequency; MTF is the modulation transfer function of the artificial eye optical system, which is used to characterize the resolution capability of the artificial eye optical system and is often used as a standard parameter for evaluating imaging quality such as contrast. Based on this, the imaging quality of transmitted information can be effectively improved; even under the influence of subsequent processing and assembly errors, a larger tolerance space can be provided, so that the resolution of the entire artificial eye optical system remains matched to 20 / 20 human visual acuity, and the display quality of XR devices can be easily tested through objective indicators.

[0101] Furthermore, the artificial eye optical system also satisfies PPD>71; PPD is Pixcel Per Degree, that is, angular resolution, which indicates the number of sensor pixels covered within a 1° angle; PPD is used to characterize the resolution capability of the artificial eye optical system; it should be noted that in this embodiment, the field of view angle is 60°, and the sensor resolution range is greater than 4260. Based on this, the angular resolution of the artificial eye optical system can be effectively improved.

[0102] Furthermore, the optical parameters of the functional surfaces corresponding to the first lens 11, the aperture stop 20, the second lens 311, the third lens 312, the fourth lens 313, the fifth lens 321, the sixth lens 322, the seventh lens 323, the liquid lens 341, the eighth lens 331 and the beam splitter prism 351 are sequentially set from the object side to the image side, including the surface type, the radius of curvature, the thickness, the refractive index, the Abbe number and the cone coefficient, as shown in Table 1; wherein the thickness represents the distance between the current surface and the next surface; the units of the radius of curvature and the thickness are both mm. In Table 1, OBJ represents the object surface, STOP represents the aperture stop surface, and IMA represents the image surface. S1 and S2 represent the object side surface and the image side surface of the first lens 11, respectively. S4 and S5 represent the object side surface and the image side surface of the second lens 311, respectively. S6 and S7 represent the object side surface and the image side surface of the third lens 312, respectively. S8 and S9 represent the object side surface and the image side surface of the fourth lens 313, respectively. S10 and S11 represent the object side surface and the image side surface of the fifth lens 321, respectively. S11 and S12 represent the object side surface and the image side surface of the sixth lens 322, respectively. S13 and S14 represent the object side surface and the image side surface of the convex-concave lens, respectively. S14 and S15 represent the object side surface and the image side surface of the biconvex lens, respectively. S16 to S24 are factory parameters of the liquid lens 341. S25 and S26 represent the object side surface and the image side surface of the eighth lens 331, respectively. S27 and S28 represent the object side surface and the image side surface of the dichroic prism 351, respectively. S29 and S30 represent the object side surface and the image side surface of the protective glass 401, respectively. It should be noted that, since the fifth lens 321 and the sixth lens 322 are a cemented lens group, that is, the image side surface of the fifth lens 321 is cemented with the object side surface of the sixth lens 322, the optical parameters corresponding to the image side surface S11 of the fifth lens 321 and the object side surface S11 of the sixth lens 322 are the same; similarly, the image side surface S14 of the convex-concave lens and the object side surface S14 of the biconvex lens are cemented, so the optical parameters corresponding to the image side surface S14 of the convex-concave lens and the object side surface S14 of the biconvex lens are the same.

[0103] It should be noted that, except for the image side surface S2 of the first lens 11, all other surfaces are spherical surfaces, and S2 is an even-order aspherical surface; the aspherical high-order coefficients of S2 are shown in Table 2.

[0104] It should be noted that in Table 1, A is the distance from the object plane to S1, indicating the object side working distance, i.e., diopter; B and C are the curvature radii of the liquid lens 341 that are electrically controlled; D and E are the inter-surface distances of the liquid lens 341 that are electrically controlled. Further, Table 3 shows the curvature radius and thickness changes of the electrically controlled liquid lens 341 of the imaging optical path of the artificial eye optical system at different working distances. The five parameters A, B, C, D, and E in Table 3 correspond to the five parameters A, B, C, D, and E in Table 1, and the units are all mm; Cases 1 to 5 respectively indicate the corresponding parameters of focusing by the electrically controlled liquid lens 341 in different diopter ranges while maintaining image quality.

[0105] Table 1 Optical parameters of artificial eye optical system

[0106]

[0107]

[0108] Table 2 Aspheric high-order coefficients

[0109]

[0110] Table 3 Parameter changes at different working distances

[0111] parameter Case 1 Case 2 Case 3 Case 4 Case 5 A 250.000000 333.000000 500.000000 1000.000000 Infinity B 51.857690 54.456059 57.412396 60.773496 64.640978 C 51.857690 54.456059 57.412396 60.773496 64.640978 D 2.187376 2.198041 2.208995 2.220147 2.231539 E 0.922624 0.911959 0.901005 0.889853 0.878461

[0112] Furthermore, by testing the artificial eye optical system of the above embodiment, the MTF curve and field curvature distortion curve of the artificial eye optical system at different working distances can be obtained, as shown in detail. Figure 5-9 As shown; it should be noted that Figure 5-9 In the figure, from left to right are the MTF curve, field curvature curve and distortion curve; in the MTF curve, the horizontal axis represents different spatial frequencies, and the vertical axis represents the MTF contrast value; in the field curvature curve, the horizontal axis represents the field curvature value of different wavelengths, and the vertical axis represents different fields of view; in the distortion curve, the horizontal axis represents the relative distortion percentage, and the vertical axis represents different fields of view. It should be noted that at the Nyquist frequency, the full depth MTF>0.16, and the F-θ distortion <1.25%, which meets the requirements of conventional imaging.

[0113] In this embodiment, the full field of view FOV of the artificial eye optical system is 60°, and the actual working distance covers 0 to 4D diopter.

[0114] In a specific embodiment, see Fig.10 and Fig.11The optical collection assembly 1 sequentially arranges the cornea lens group 10, the aperture stop 20, the second lens 311, the third lens 312, the fourth lens 313, the beam splitter group 35, the fifth lens 321, the sixth lens 322, the seventh lens 323, the focusing lens group 34 and the eighth lens 331 in order from the object side to the image side;

[0115] The optical system of the artificial eye satisfies TTL / ImgH≤5.9; wherein TTL is the distance on the optical axis from the lens surface of the optical collection component 1 closest to the object side to the imaging surface of the optical collection component 1, and ImgH is the image plane height at the full field of view.

[0116] Among them, the cornea lens group 10 includes a first lens 11; the first lens group 31 includes a second lens 311, a third lens 312, and a fourth lens 313; the second lens group 32 includes a fifth lens 321, a sixth lens 322, and a seventh lens 323; wherein the fifth lens 321 and the sixth lens 322 constitute a cemented lens group; the third lens group 33 includes an eighth lens 331; the focusing lens group 34 includes a liquid lens 341; the liquid lens 341 realizes the transformation of the positive and negative optical focal length by electrically adjusting the positive and negative surface curvature; the beam splitter group 35 includes a beam splitter prism 351.

[0117] Among them, the artificial eye optical system satisfies TTL / ImgH≤5.9, TTL is the distance from the lens surface of the optical acquisition component 1 closest to the object side, that is, the object side of the first lens 11, to the imaging surface of the optical acquisition component 1 on the optical axis, and the TTL value range is <29.5mm; ImgH is the image plane height under the full field of view, and the ImgH value range is 4mm to 5mm. Based on this, the total length of the artificial eye optical system can be effectively reduced, which is conducive to the miniaturization of the artificial eye optical system.

[0118] Preferably, the second lens 311 has positive refractive power, and the object side surface of the second lens 311 is concave, and the image side surface is concave;

[0119] The third lens 312 has negative optical power, and the object side surface of the third lens 312 is concave, and the image side surface is convex;

[0120] The fourth lens 313 has positive refractive power, and the object-side surface and the image-side surface of the fourth lens 313 are convex;

[0121] The fifth lens element 321 has negative optical power, and the object-side surface and the image-side surface of the fifth lens element 321 are concave.

[0122] The sixth lens 322 has negative optical power, and the object-side surface and the image-side surface of the sixth lens 322 are convex;

[0123] The seventh lens element 323 has positive refractive power, and the object-side surface and the image-side surface of the seventh lens element 323 are convex.

[0124] The eighth lens element 331 has positive refractive power, and the object-side surface and the image-side surface of the eighth lens element 331 are convex.

[0125] Preferably, the focal length range of the first lens 11 is -10mm to -15mm; the focal length range of the second lens 311 is 15mm to 20mm; the focal length range of the third lens 312 is -10mm to -15mm; the focal length range of the fourth lens 313 is 10mm to 15mm; the focal length range of the fifth lens 321 is -20mm to -25mm; the focal length range of the sixth lens 322 is -175mm to -180mm; the focal length range of the seventh lens 323 is 20mm to 25mm; and the focal length range of the eighth lens 331 is 15mm to 20mm.

[0126] Preferably, the distance range between the image side of the first lens 11 and the aperture stop 20 is 0.9 mm to 2 mm; the distance range between the aperture stop 20 and the object side of the second lens 311 is 0.9 mm to 2 mm; the distance range between the image side of the fourth lens 313 and the object side of the dichroic prism 351 is 0.9 mm to 3 mm; the distance range between the image side of the dichroic prism 351 and the object side of the fifth lens 321 is 0.9 mm to 3 mm; the distance range between the image side of the seventh lens 323 and the object side of the liquid lens 341 is 0.9 mm to 3 mm; the distance range between the image side of the liquid lens 341 and the object side of the eighth lens 331 is 1 mm to 7 mm; the distance range between the image side of the eighth lens 331 and the object side of the protective glass 401 is 0.9 mm to 3 mm.

[0127] Furthermore, the artificial eye optical system also satisfies F Number<2.4. Wherein, F Number is the aperture number and F number of the optical system; F Number is equal to the ratio of focal length to entrance pupil diameter; wherein, the focal length value range is<9.6mm, and the entrance pupil diameter value range is 2mm~4mm. Based on this, the amount of light entering the artificial eye optical system can be effectively increased, thereby effectively increasing the light energy reaching the image event perception sensor 40 or coupled into the optical fiber 80, and at the same time, the signal-to-noise ratio of the artificial eye optical system can be improved, thereby improving the image quality.

[0128] Furthermore, the artificial eye optical system also meets the requirements of full-depth MTF>0.25 at Nyquist frequency and full-depth MTF>0.57 at 1 / 2Nyquist frequency; MTF is the modulation transfer function of the artificial eye optical system, which is used to characterize the resolution capability of the artificial eye optical system and is often used as a standard parameter for evaluating imaging quality such as contrast. Based on this, the imaging quality of transmitted information can be effectively improved; even under the influence of subsequent processing and assembly errors, a larger tolerance space can be provided, so that the resolution of the entire artificial eye optical system remains matched to 20 / 20 human visual acuity, and the display quality of XR devices can be easily tested through objective indicators.

[0129] Furthermore, the artificial eye optical system also satisfies PPD>70; PPD is Pixcel Per Degree, that is, angular resolution, which indicates the number of sensor pixels covered within a 1° angle; PPD is used to characterize the resolution capability of the artificial eye optical system; it should be noted that in this embodiment, the field of view angle is 60°, and the sensor resolution range is greater than 4260. Based on this, the angular resolution of the artificial eye optical system can be effectively improved.

[0130] Furthermore, optical parameters of functional surfaces corresponding to the first lens 11, the aperture stop 20, the second lens 311, the third lens 312, the fourth lens 313, the beam splitter prism 351, the fifth lens 321, the sixth lens 322, the seventh lens 323, the liquid lens 341 and the eighth lens 331 are sequentially set from the object side to the image side, including surface type, radius of curvature, thickness, refractive index, Abbe number and cone coefficient, as shown in Table 4; wherein the units of the radius of curvature and the thickness are both mm. In Table 4, OBJ represents the object plane, STOP represents the aperture stop plane, and IMA represents the image plane; S1 and S2 represent the object side surface and the image side surface of the first lens 11, respectively; S4 and S5 represent the object side surface and the image side surface of the second lens 311, respectively; S6 and S7 represent the object side surface and the image side surface of the third lens 312, respectively; S8 and S9 represent the object side surface and the image side surface of the fourth lens 313, respectively; S10 and S11 represent the object side surface and the image side surface of the beam splitter prism 351, respectively; S12 and S13 represent the object side surface and the image side surface of the fifth lens 321, respectively; S13 and S14 represent the object side surface and the image side surface of the sixth lens 322, respectively; S15 and S16 represent the object side surface and the image side surface of the seventh lens 323, respectively; S17 to S25 are factory parameters of the liquid lens 341, S26 and S27 represent the object side surface and the image side surface of the eighth lens 331, respectively; and S28 and S29 represent the object side surface and the image side surface of the protective glass 401, respectively. It should be noted that, since the fifth lens 321 and the sixth lens 322 are a cemented lens group, that is, the image side surface of the fifth lens 321 is cemented with the object side surface of the sixth lens 322, the optical parameters corresponding to the image side surface S13 of the fifth lens 321 and the object side surface S13 of the sixth lens 322 are the same.

[0131] It should be noted that, except for the image-side surface S2 of the first lens 11, the object-side surface S15 and the image-side surface S16 of the seventh lens 323, the remaining surfaces are spherical surfaces; S2, S15 and S16 are even-order aspherical surfaces; the aspherical high-order coefficients of S2, S15 and S16 are as shown in Table 5.

[0132] It should be noted that in Table 4, A is the distance from the object plane to S1, indicating the object side working distance, i.e., the diopter; B and C are the curvature radii of the liquid lens 341 that are electrically controlled; D and E are the inter-surface distances of the liquid lens 341 that are electrically controlled. Further, Table 6 shows the curvature radius and thickness changes of the electrically controlled liquid lens 341 of the imaging optical path of the artificial eye optical system at different working distances. The five parameters A, B, C, D, and E in Table 6 correspond to the five parameters A, B, C, D, and E in Table 4, and the units are all mm; Cases 1 to 5 respectively indicate the corresponding parameters of focusing by the electrically controlled liquid lens 341 in different diopter ranges while maintaining image quality.

[0133] Table 4 Optical parameters of artificial eye optical system

[0134] Face number Surface type Radius of curvature thickness Refractive Index Abbe number Cone coefficient OBJ STANDARD Infinity 167.000000(A) 0.000000 S1 STANDARD 7.800000 1.500000 1.62 25.9 -0.250000 S2 EVENASPH 3.547700 1.500000 0.784751 STOP STANDARD Infinity 1.000000 0.000000 S4 STANDARD -5.294350 3.000394 1.95 17.9 0.000000 S5 STANDARD -5.023488 0.163508 0.000000 S6 STANDARD -4.815058 2.734543 2.00 25.4 0.000000 S7 STANDARD -9.134715 0.098911 0.000000 S8 STANDARD 24.232362 2.906705 1.62 57.0 0.000000 S9 STANDARD -13.203156 0.999927 0.000000 S10 STANDARD Infinity 11.663580 1.88 40.9 0.000000 S11 STANDARD Infinity 1.244872 0.000000 S12 STANDARD -48.817087 0.899962 1.85 23.8 0.000000 S13 STANDARD 9.978684 3.000737 1.59 68.3 0.000000 S14 STANDARD -30.941865 0.099860 0.000000 S15 EVENASPH 20.116138 2.999934 1.53 55.8 -8.455597 S16 EVENASPH -22.209791 1.186925 -0.737304 S17 STANDARD Infinity 0.090000 0.000000 S18 STANDARD Infinity 0.500000 1.52 64.2 0.000000 S19 STANDARD Infinity 2.154834(D) 0.000000 S20 STANDARD 45.274588(B) 0.100000 1.41 49.9 0.000000 S21 STANDARD 45.274588(C) 0.955166(E) 1.45 55.5 0.000000 S22 STANDARD Infinity 0.000000 1.41 49.9 0.000000 S23 STANDARD Infinity 1.000000 1.52 64.2 0.000000 S24 STANDARD Infinity 1.000000 0.000000 S25 STANDARD Infinity 5.807002 0.000000 S26 STANDARD 24.940102 3.100019 1.50 81.6 0.000000 S27 STANDARD -15.331495 1.220892 0.000000 S28 STANDARD Infinity 0.400000 1.52 64.2 0.000000 S29 STANDARD Infinity 0.045000 0.000000 IMA STANDARD Infinity 0.000000 0.000000

[0135] Table 5 Aspheric high-order coefficients

[0136]

[0137]

[0138] Table 6 Parameter changes at different working distances

[0139] parameter Case 1 Case 2 Case 3 Case 4 Case 5 A 167.000000 200.000000 333.000000 1000.000000 Infinity B 45.274588 47.960073 54.764459 64.384140 70.831684 C 45.274588 47.960073 54.764459 64.384140 70.831684 D 2.154834 2.169196 2.199239 2.230825 2.247174 E 0.955166 0.940804 0.910761 0.879175 0.862826

[0140] Furthermore, by testing the artificial eye optical system of the above embodiment, the MTF curve and field curvature distortion curve of the artificial eye optical system at different working distances can be obtained, as shown in detail. Figure 12-16 As shown; it should be noted that Figure 12-16 In the figure, from left to right are the MTF curve, field curvature curve and distortion curve; in the MTF curve, the horizontal axis represents different spatial frequencies, and the vertical axis represents the MTF contrast value; in the field curvature curve, the horizontal axis represents the field curvature value of different wavelengths, and the vertical axis represents different fields of view; in the distortion curve, the horizontal axis represents the relative distortion percentage, and the vertical axis represents different fields of view. It should be noted that at the Nyquist frequency, the full depth MTF>0.25, and the F-θ distortion<1.71%, which meets the requirements of conventional imaging.

[0141] In this embodiment, the full field of view FOV of the artificial eye optical system is 60°, and the actual working distance covers 0 to 6D diopter.

[0142] The above-mentioned artificial eye optical system, on the first hand, based on the optical acquisition component 1 and the signal sensing component 2, can not only mimic the physiological structures of the human cornea, sclera, pupil, iris, etc., but also simulate the human eye's comprehensive perception of static images, motion events, scene brightness and chromaticity within the field of view, so as to achieve a comprehensive measurement of the display quality of the XR device; on the second hand, based on the optical acquisition component 1, the resolution of the artificial eye optical system can be kept matching the 20 / 20 human visual acuity, and the angular resolution and signal-to-noise ratio of the artificial eye optical system can be improved, laying the foundation for improving the reliability of the display quality measurement results of the XR device; on the third hand, based on the optical acquisition component 1, the miniaturization of the artificial eye optical system is achieved, and the compactness of the artificial eye optical system is improved.

[0143] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0144] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0145] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0146] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An artificial eye optical system, characterized in that: The artificial eye optical system includes an optical acquisition component and a signal sensing component; The optical collection component includes a cornea lens group, an aperture stop and a conventional lens group arranged in sequence from the object side to the image side; the external light is transmitted to the signal sensing component through the optical collection component; the cornea lens group has a negative optical focal length; the conventional lens group includes a first lens group, a second lens group, a third lens group, a focusing lens group and a beam splitter group; the first lens group, the second lens group and the third lens group all have positive optical focal length; the first lens group includes a second lens, a third lens and a fourth lens; the second lens group includes a fifth lens, a sixth lens and a seventh lens; the fifth lens and the sixth lens constitute a cemented lens group; the third lens group includes an eighth lens; the focusing lens group includes a liquid lens for adjusting the optical focal length; the beam splitter group includes a beam splitter prism for beam splitting incident light; The signal sensing component is disposed on the optical path formed by the optical collection component, and is used to receive the light transmitted by the optical collection component.

2. The artificial eye optical system according to claim 1, characterized in that: The cornea lens assembly includes a first lens; the first lens has negative optical power, and the object side surface of the first lens is a convex surface, and the image side surface is a concave surface.

3. The artificial eye optical system according to claim 1, characterized in that: The signal sensing component includes an image event perception sensor and a spectrometer; After passing through the optical collection component, the external light forms a first split light and a second split light; The image event sensing sensor is disposed on the optical path of the first split light beam, and is used to receive the first split light beam; The spectrometer is arranged on the optical path of the second split light beam, and is used for receiving the second split light beam.

4. The artificial eye optical system according to claim 3, characterized in that: The image event perception sensor is an APS and DVS two-in-one sensor.

5. The artificial eye optical system according to claim 3, characterized in that: The optical collection assembly also includes: a field aperture, an optical fiber coupling interface and an optical fiber; The field diaphragm and the fiber coupling interface are sequentially arranged along the propagation direction of the second spectral light; the fiber coupling interface is connected to the spectrometer via the optical fiber; the second spectral light is sequentially transmitted to the spectrometer via the field diaphragm, the light coupling interface and the optical fiber.

6. The artificial eye optical system according to claim 5, characterized in that: The optical collection assembly also includes: a converging lens group; The converging mirror group is arranged between the converging mirror group and the field aperture along the propagation direction of the second split light; the second split light is sequentially transmitted to the spectrometer through the converging mirror group, the field aperture, the light coupling interface and the optical fiber.

7. The artificial eye optical system according to claim 1, characterized in that: The optical collection assembly sequentially arranges the cornea lens group, the aperture stop, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the focusing lens group, the eighth lens and the beam splitter group in order from the object side to the image side; The artificial eye optical system satisfies TTL / ImgH≤6.6; wherein TTL is the distance on the optical axis from the lens surface closest to the object side of the optical acquisition component to the imaging surface of the optical acquisition component, and ImgH is the image plane height at the full field of view.

8. The artificial eye optical system according to claim 7, characterized in that: The second lens has negative optical power, and the object side surface and image side surface of the second lens are concave; The third lens has positive power, and the object side surface and image side surface of the third lens are convex; The fourth lens has positive refractive power, and the object side surface of the fourth lens is convex, and the image side surface is convex; The fifth lens has negative optical power, and the object side surface of the fifth lens is concave, and the image side surface is convex; The sixth lens has positive refractive power, and the object side surface of the sixth lens is concave, and the image side surface is convex; The seventh lens is a double cemented lens; the double cemented lens comprises a convex-concave lens and a biconvex lens that are cemented in sequence; the convex-concave lens and the biconvex lens both have negative optical power; The eighth lens has positive refractive power, and the object-side surface of the eighth lens is convex, and the image-side surface is concave.

9. The artificial eye optical system according to claim 1, characterized in that: The optical collection assembly sequentially arranges the cornea lens group, the aperture stop, the second lens, the third lens, the fourth lens, the beam splitter group, the fifth lens, the sixth lens, the seventh lens, the focusing lens group and the eighth lens in order from the object side to the image side; The artificial eye optical system satisfies TTL / ImgH≤5.9; wherein TTL is the distance on the optical axis from the lens surface closest to the object side of the optical acquisition component to the imaging surface of the optical acquisition component, and ImgH is the image plane height at the full field of view.

10. The artificial eye optical system according to claim 9, characterized in that: The second lens has positive refractive power, and the object side surface and image side surface of the second lens are concave; The third lens has negative optical power, and the object side surface of the third lens is concave, and the image side surface is convex; The fourth lens has positive refractive power, and the object side surface of the fourth lens is convex, and the image side surface is convex; The fifth lens has negative optical power, and the object side surface and image side surface of the fifth lens are concave; The sixth lens has negative optical power, and the object side surface of the sixth lens is convex, and the image side surface is convex; The seventh lens has positive power, and the object side surface and the image side surface of the seventh lens are convex; The eighth lens has positive refractive power, and the object-side surface and the image-side surface of the eighth lens are convex.

Images