Human eye simulation camera

Abstract

The utility model provides a human eye simulation camera, and belongs to the technical field of camera shooting. The human eye simulation camera comprises a corneal lens, a simulation iris and a photosensitive element which are sequentially arranged along a photosensitive path, a simulation pupil is arranged in the center of the simulation iris, and a filtering medium for infrared cut-off is arranged between the simulation pupil and the photosensitive element. Therefore, according to the human eye simulation camera provided by the invention, unnecessary infrared light reflection can be eliminated by arranging the filtering medium, so that the recognition precision of an eye movement algorithm is improved.

Description

Technical Field

[0001] This application relates to the field of camera technology, and more particularly to human eye simulation cameras. Background Technology

[0002] Human eye simulators are designed to replicate or simulate the functions and characteristics of the human eye, capturing and analyzing eye movements and related visual information for various applications such as research, education, product development, and testing. This integrated design allows the human eye simulator to work with a control system to directly capture its own eye movements, enabling eye-tracking testing and evaluation on virtual reality devices.

[0003] Human eye simulators typically incorporate simulated eye structures to provide a deeper understanding of the eye's anatomy, including the cornea, lens, iris, and retina, in order to accurately mimic their functions. They also feature lens systems; simulating the optical characteristics of the human eye requires precise lens design to replicate the eye's focusing ability and field of vision.

[0004] In existing human eye simulation cameras, the lens system can employ a fixed-focus miniature camera, combining an artificial cornea with the fixed-focus miniature camera to achieve imaging. However, due to the limited focusing capability of the fixed-focus miniature camera and its mismatch with the curvature of the artificial cornea, light cannot be perfectly focused onto the sensor of the fixed-focus miniature camera when imaging at infinity, resulting in a blurry image. Consequently, this can easily lead to significant errors in image analysis or calibration.

[0005] Furthermore, human eye simulation cameras are often used in conjunction with eye-tracking devices. These devices typically employ an infrared emitter to emit infrared light towards the simulated eyeball, and then a sensor receives the infrared light reflected from the simulated iris. During this process, the infrared light can enter the simulated eyeball through the simulated pupil and be received by the photosensitive element, affecting the image quality of the human eye simulation camera. In addition, if the infrared light entering the simulated eyeball is reflected out of the camera and received by the aforementioned sensor, it can create stray light, affecting the accuracy of the eye-tracking device. Utility Model Content

[0006] This application provides a human eye simulation camera. Setting a filter medium can improve the image quality of the human eye simulation camera and also allow the human eye simulation camera to reduce or even eliminate its impact on the accuracy of the eye tracking device when used in conjunction with an eye-tracking device.

[0007] This application provides a human eye simulation camera, including a corneal lens, a simulated iris and a photosensitive element arranged sequentially along the light-sensing path. A simulated pupil is provided at the center of the simulated iris, and a filter medium for infrared cutoff is provided between the simulated pupil and the photosensitive element.

[0008] The human eye simulation camera provided in this application includes a corneal lens, a simulated iris, and a photosensitive element arranged sequentially along the light-sensing path. A simulated pupil is located at the center of the simulated iris, and a filter medium for infrared cutoff is provided between the simulated pupil and the photosensitive element. This filter medium eliminates unnecessary infrared light reflection, thereby improving the recognition accuracy of the eye-tracking algorithm. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of a human eye simulation camera provided in an embodiment of this application;

[0010] Figure 2 This is a schematic diagram of another human eye simulation camera provided in an embodiment of this application;

[0011] Figure 3 This application provides a schematic diagram of the structure of a human eye simulation camera in fixed-focus mode.

[0012] Figure 4 A schematic diagram of another human eye simulation camera in a fixed-focus mode provided in this application embodiment;

[0013] Figure 5 A schematic diagram of the structure of a human eye simulation camera with a first zoom lens provided in an embodiment of this application;

[0014] Figure 6 This is a schematic diagram of the structure of the first zoom lens provided in an embodiment of this application;

[0015] Figure 7 A schematic diagram of the structure of a human eye simulation camera with a second zoom lens provided in an embodiment of this application;

[0016] Figure 8 This is a schematic diagram of the structure of the second zoom lens provided in an embodiment of this application;

[0017] Figure 9 A schematic diagram of the structure of a human eye simulation camera with a third zoom lens provided in an embodiment of this application;

[0018] Figure 10 This is a schematic diagram of the structure of the third zoom lens in its initial state, as provided in the embodiments of this application.

[0019] Figure 11 This is a schematic diagram of the third zoom lens in a deformed state provided in an embodiment of this application;

[0020] Figure 12 A schematic diagram of the structure of a human eye simulation camera with a fourth zoom lens provided in an embodiment of this application;

[0021] Figure 13This is a schematic diagram of the structure of the fourth zoom lens in one state, as provided in an embodiment of this application;

[0022] Figure 14 A schematic diagram of the structure of the fourth zoom lens provided in an embodiment of this application in another state;

[0023] Figure 15 A schematic diagram of the structure of a human eye simulation camera with a fifth zoom lens provided in an embodiment of this application;

[0024] Figure 16 This is a schematic diagram of the fifth zoom lens provided in the embodiment of this application under a voltage-free state;

[0025] Figure 17 This is a schematic diagram of the structure of the fifth zoom lens in the energized state provided in the embodiments of this application;

[0026] Figure 18 A schematic diagram of the structure of a human eye simulation camera with a sixth zoom lens provided in an embodiment of this application;

[0027] Figure 19 A schematic diagram of the sixth zoom lens provided in the embodiment of this application in the absence of electromagnetic fields;

[0028] Figure 20 This is a schematic diagram of the sixth zoom lens provided in the embodiment of this application in the power-on state.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100-Human eye simulation camera;

[0031] 200 - Corneal lens; 210 - Convex surface; 220 - Second plane; 230 - Concave surface; 240 - Inner cavity;

[0032] 300 - Simulated iris; 310 - Simulated pupil;

[0033] 400 - Camera module; 410 - Fixed-focus module; 411 - Photosensitive element; 420 - Negative lens; 421 - First plane; 430 - First zoom lens; 431 - First substrate; 432 - First electrode; 433 - Liquid crystal molecule alignment film; 434 - Liquid crystal layer; 4341 - Liquid crystal molecule; 435 - First voltage control system; 436 - Sealing layer; 440 - Second zoom lens; 441 - Second substrate; 442 - Second transparent film; 4421 - Second cavity; 443 - Motor; 444 - Push-pull control system; 4441 - Piston structure; 445 - Transparent liquid; 450 - Third zoom lens; 451 - Third housing; 452 - Third transparent film; 453 - First chamber; 454 - Second chamber; 4 55-First inlet; 456-Second inlet; 457-First liquid; 458-Second liquid; 460-Fourth zoom lens; 461-Fourth housing; 4611-Fourth cavity; 462-Fourth electrode; 463-Fourth voltage control system; 464-Third liquid; 465-Fourth liquid; 466-Hydrophobic layer; 470-Fifth zoom lens; 471-Fifth transparent film; 4711-Fifth cavity; 472-Fifth electrode; 4721-Upper electrode; 4722-Lower electrode; 473-Fifth voltage control system; 474-Fifth liquid; 480-Sixth zoom lens; 481-Sixth transparent film; 4811-Sixth cavity; 482-Magnet; 483-Electromagnetic control system; 484-Sixth liquid;

[0034] 500 - Filter medium; 510 - Absorbing filter; 520 - Adhesive layer;

[0035] 600 - First reflective filter; 610 - First sensor;

[0036] 700 - Second reflective filter; 710 - Second sensor;

[0037] 800-Privacy protection layer. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0039] As described in the background section, in existing human eye simulation cameras, the lens system can employ a fixed-focus miniature camera, combining an artificial cornea with the fixed-focus miniature camera to achieve imaging. However, due to the limited focusing capability of the fixed-focus miniature camera and its mismatch with the curvature of the artificial cornea, light cannot be perfectly focused onto the photosensitive element of the fixed-focus miniature camera when imaging at infinity, resulting in a blurry image. Consequently, this can easily lead to significant errors in image analysis or calibration.

[0040] Furthermore, human eye simulation cameras are often used in conjunction with eye-tracking devices. These devices typically employ an infrared emitter to emit infrared light towards the simulated eyeball, and then a sensor receives the infrared light reflected from the simulated iris. During this process, the infrared light can enter the simulated eyeball through the simulated pupil and be received by the photosensitive element, affecting the image quality of the human eye simulation camera. In addition, if the infrared light entering the simulated eyeball is reflected out of the camera and received by the aforementioned sensor, it can create stray light, affecting the accuracy of the eye-tracking device.

[0041] To address the aforementioned technical problems, this application provides a human eye simulation camera. The human eye simulation camera includes a corneal lens, a simulated iris, and a photosensitive element arranged sequentially along a light-sensing path. A simulated pupil is located at the center of the simulated iris, and a filter medium for infrared cutoff is provided between the simulated pupil and the photosensitive element. This filter medium eliminates unnecessary infrared light reflection, thereby improving the recognition accuracy of the eye-tracking algorithm.

[0042] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0043] This application provides a human eye simulation camera. Using a filter medium can eliminate unnecessary infrared light reflection, thereby improving the recognition accuracy of the eye-tracking algorithm. The specific structure of the human eye simulation camera provided in this application embodiment will be described below with reference to the accompanying drawings.

[0044] refer to Figure 1This application provides a human eye simulation camera 100 in a first aspect. The human eye simulation camera 100 may include a corneal lens 200, a simulated iris 300, and a photosensitive element 411. The corneal lens 200, simulated iris 300, and photosensitive element 411 may be arranged sequentially along a light-sensing path. In this embodiment, a simulated pupil 310 may be provided on the simulated iris 300. The simulated iris 300 may be a circular structure, and the simulated pupil 310 may be located at the center of the simulated iris 300. Furthermore, a light-filtering medium 500 may be provided between the simulated pupil 310 and the photosensitive element 411. It is understood that infrared light emitted by an eye-tracking device can pass through the simulated pupil 310 and enter the interior of the human eye simulation camera 100, while the light-filtering medium 500 can be used to block infrared light, preventing it from entering the photosensitive element 411. The filter medium 500 is positioned downstream of the simulated pupil 310 in the photosensitive path to prevent it from obstructing the side of the simulated iris 300 facing the corneal lens 200. This allows the eye-tracking device to collect infrared light reflection information from the side of the simulated iris 300 facing the corneal lens 200 during eye tracking with the human eye simulation camera 100. Furthermore, the filter medium 500 is positioned upstream of the photosensitive element 411 in the photosensitive path to prevent infrared light from entering the photosensitive element 411 and affecting the image quality of the human eye simulation camera 100. Therefore, the filter medium 500 is positioned between the simulated pupil 310 and the photosensitive element 411.

[0045] In one possible implementation, the corneal lens 200 can be a positive lens. For example, the corneal lens 200 can be a convex lens, and the outward-facing side of the corneal lens 200 is convex 210. In the embodiments of this application, such as... Figure 1 As shown, the simulated iris 300 can be located on the side of the corneal lens 200 facing away from the convex surface 210, the simulated pupil 310 is located on the simulated iris 300, and the photosensitive element 411 can be located on the side of the simulated iris 300 facing away from the corneal lens 200. In this way, light entering the human eye simulation camera 100 first passes through the corneal lens 200, then through the simulated pupil 310, and finally through the filter medium 500 to form an image on the photosensitive element 411. By adjusting the focal length, the image is clearly presented on the photosensitive element 411, thus solving the problem of blurry images in existing human eye simulation devices.

[0046] It is understood that the filter medium 500 can exist in the form of a filter coating or a filter. This application does not impose any limitations on this embodiment. When the filter medium 500 is a filter coating, the filter coating is integrated on the side of the simulated iris facing the photosensitive element.

[0047] Continue to refer to Figure 1In the specific embodiment of this application, the filter medium 500 is exemplified as a filter. In one possible implementation, the filter medium 500 can be an absorption filter 510. The absorption filter 510 can be located on the side of the simulated iris 300 facing away from the corneal lens 200, and the absorption filter 510 can absorb infrared light before it enters the photosensitive element 411. The absorption filter 510 has an absorption function for infrared light, thereby absorbing the infrared light incident on it, eliminating unnecessary infrared light reflection, and improving the recognition accuracy of the eye-tracking algorithm.

[0048] Continue to refer to Figure 1 Based on the above embodiments, an adhesive layer 520 can be provided between the simulated iris 300 and the filter medium 500 to avoid gaps between them. The refractive index of the adhesive layer 520 can be the same as that of the simulated pupil 310. In this embodiment, when the filter medium 500 is an absorption filter 510, the absorption filter 510 is typically made of blue glass. The simulated iris 300 and the absorption filter 510 need to be bonded together by the adhesive layer 520 to fill the gap between them. If there is a gap between the simulated iris 300 and the absorption filter 510, an air layer is formed between them. Since the air layer and the simulated pupil 310 have different refractive indices, infrared light will be reflected at the interface with different refractive indices. This reflected light is reflected from the simulated pupil 310 out of the human eye simulation camera 100 and is easily received by the eye-tracking device located outside, forming stray light and thus affecting the accuracy of eye tracking.

[0049] Continue to refer to Figure 1 Based on the above embodiments, the adhesive layer 520 can be black. The black adhesive layer 520 integrates the adhesive and privacy functions, thus providing both adhesion and privacy protection. In other embodiments, the simulated iris 300 and the filter medium 500 may have an adhesive layer 520 and a privacy layer 800, which can be separate structures. The privacy layer 800 may be located on the side of the simulated iris 300 facing away from the corneal lens 200, while the adhesive layer 520 may be located between the privacy layer 800 and the absorptive filter 510. This application does not limit the scope of the embodiments described herein.

[0050] Understandably, since the absorption filter 510 is usually made of blue glass, the blue color of the absorption filter 510 may be transmitted outward through the simulated pupil 310. Therefore, a black adhesive layer 520 is provided between the simulated iris 300 and the absorption filter 510.

[0051] Based on the above embodiments, it is understood that the refractive index of the adhesive layer 520 can be matched with the refractive index of the simulated pupil 310. For example, solid adhesive (OCA adhesive), liquid adhesive (UV adhesive), or other adhesives with similar refractive indices can be used to avoid light being reflected at the interface between the adhesive layer 520 and the simulated pupil 310 and forming stray light to the eye-tracking infrared camera.

[0052] Based on the above embodiments, it can be understood that the human eye simulation camera 100 provided in this application embodiment can also reflect infrared light at the simulated pupil 310 through the first reflective filter 600. In one possible implementation, an infrared anti-reflection film can be provided at the end of the corneal lens 200 facing the first reflective filter 600, thereby achieving nearly 100% transmission of infrared light, facilitating the detection of infrared and ultraviolet radiation. In addition, a condensing lens can be provided at the front end of both the first sensor 610 and the second sensor 710 to improve the signal-to-noise ratio.

[0053] Based on the above embodiments, the relationship between reflectivity and refractive index can be expressed as follows:

[0054]

[0055] Where n1 is the refractive index of the corneal lens 200, n2 is the refractive index of the simulated pupil 310, and R is the reflectivity. From the above formula, it can be seen that when n1 and n2 are equal, the reflectivity is zero. That is, after light passes through the corneal lens 200, the refractive index of the next layer of optically transparent material it enters must be almost identical to the refractive index of the corneal lens 200. At this point, it can be the refractive index n2 of the simulated pupil 310, until the light enters the filter medium 500, where all the infrared light entering the simulated pupil 310 is absorbed.

[0056] refer to Figure 2 In another possible implementation, the filter medium 500 may also be a first reflective filter 600. The first reflective filter 600 may be located on the side of the simulated iris 300 facing away from the corneal lens 200, and the first reflective filter 600 may be tilted relative to the photosensitive path. For example, the first reflective filter 600 may be positioned at 45°, but this embodiment is not limited thereto. It is understood that the infrared light emitted by the external eye-tracking device can pass sequentially through the corneal lens 200 and the simulated pupil 310, and then be reflected by the first reflective filter 600, thereby causing the infrared light to deviate from the photosensitive path.

[0057] Continue to refer to Figure 2Based on the above embodiments, a first sensor 610 may be provided on one side of the first reflective filter 600. It is understood that the first sensor 610 may be located on the reflection path of the first reflective filter 600. In this way, the first sensor 610 can receive the infrared light reflected by the first reflective filter 600, enabling the first reflective filter 600 to reflect the infrared light to the first sensor 610 before it enters the photosensitive element 411, thereby achieving the detection of infrared light.

[0058] Continue to refer to Figure 2 Based on the above embodiments, the filter medium 500 may further include a second reflective filter 700, which is used to reflect ultraviolet light. The second reflective filter 700 may be located between the first reflective filter 600 and the photosensitive element 411 in the photosensitive path. The second reflective filter 700 may also be inclined relative to the photosensitive path. For example, the second reflective filter 700 may be positioned at 135°, but this embodiment is not limited thereto. It is understood that the ultraviolet light emitted by the external eye-tracking device can pass sequentially through the corneal lens 200, the simulated pupil 310, and the first reflective filter 600, and then be reflected by the second reflective filter 700, thereby causing the ultraviolet light to deviate from the photosensitive path.

[0059] Continue to refer to Figure 2 Based on the above embodiments, a second sensor 710 may be provided on one side of the second reflective filter 700. It is understood that the second sensor 710 may be located on the reflection path of the second reflective filter 700. In this way, the second sensor 710 can receive the ultraviolet light reflected by the second reflective filter 700, allowing the second reflective filter 700 to reflect the ultraviolet light to the second sensor 710 before it enters the photosensitive element 411, thereby achieving the detection of ultraviolet light. It is understood that the combined arrangement of the first reflective filter 600, the second reflective filter 700, the first sensor 610, and the second sensor 710 enables the detection of both infrared and ultraviolet radiation intensity from the surrounding environment.

[0060] It is understood that the first reflective filter 600 and the second reflective filter 700 are usually transparent films. Therefore, a black adhesive layer 520 can be provided between the simulated iris 300 and the first reflective filter 600, or a black adhesive layer 520 can be omitted. The choice can be made according to the actual situation inside the human eye simulation camera 100. This application embodiment does not impose any restrictions here.

[0061] It is understood that, in this embodiment of the application, an absorptive filter 510 is required when photographing a virtual reality device with eye-tracking functionality. In other cases, such as when the photographing device lacks an infrared camera or uses other devices based on corneal reflection, a reflective filter may be used. This embodiment of the application is not limited thereto.

[0062] Continue to refer to Figure 1 In another possible implementation, a privacy layer 800 may be provided between the filter medium 500 and the simulated iris 300. The privacy layer 800 may be integrated into the side of the simulated iris 300 facing the photosensitive element 411. In one possible implementation, the privacy layer 800 may be a black coating, thereby making the privacy layer 800 consistent with the color of a real human pupil.

[0063] It is understood that, based on the above embodiments, the privacy layer 800 can be composed of a single-layer polarizer, making its color close to the pupil color. Alternatively, the privacy layer 800 can be composed of a double-layer polarizer, with the absorption axes of the two polarizers forming a certain angle with each other. The range of the angle θ between the absorption axes of the two polarizers is 0° < θ < 90°. If the absorption axes of the two polarizers are parallel, i.e., the angle between the absorption axes of the two polarizers is 0°, the light transmittance is 100%. If the absorption axes of the two polarizers are perpendicular, i.e., the angle between the absorption axes of the two polarizers is 90°, the light transmittance is 0, and the privacy layer 800 is completely black. Alternatively, the privacy layer 800 can be composed of a one-way transparent film, which has a certain heat insulation function. One side of the one-way transparent film is usually black, and the black side faces outwards towards the human eye simulation camera 100. Alternatively, the privacy layer 800 can be composed of a 360° privacy film, typically black in appearance. Alternatively, the privacy layer 800 can be composed of two 180° privacy films, which can be arranged perpendicularly to each other. This application does not limit the form of the privacy layer 800.

[0064] Building upon the above embodiments, the privacy layer 800 and the simulated pupil 310 can be made of the same material, meaning the medium forming the simulated pupil 310 can be the same adhesive layer as the privacy layer 800. During the assembly of the human eye simulation camera 100, the privacy layer 800 is injected through a through-hole at the center of the simulated iris 300, allowing the simulated pupil 310 to be formed first. This allows the privacy layer 800 to cover the side of the simulated iris 300 facing the filter medium 500. After the privacy layer 800 cures, it forms a privacy layer 800 with a privacy function. It is understood that the refractive index of the privacy layer 800 should match the refractive index of the filling material of the simulated pupil 310. In this way, by selecting suitable materials, the simulated pupil 310 and the privacy layer 800 can be processed in one step, facilitating operation.

[0065] refer to Figure 3 Based on the above embodiments, the human eye simulation camera 100 may further include a lens disposed along the light-sensing path between the filter medium 500 and the photosensitive element 411. The number of lenses may be at least two, and this embodiment does not limit the number. In this embodiment, the lens closest to the filter medium 500 may be a negative lens 420. A fixed-focus module 410 may be provided on the side of the filter medium 500 facing the photosensitive element 411, and the fixed-focus module 410 may contain at least one lens. The negative lens 420 is disposed between the filter medium 500 and the fixed-focus module 410, thereby combining the fixed-focus module 410 and the negative lens 420. Since the curvature setting of the corneal lens 200 is the same as that of the human eye, and the focusing capability of the fixed-focus module 410 is limited, it is easy to form an image at the end of the photosensitive element 411 closest to the corneal lens 200, resulting in blurry photos. Therefore, a negative lens 420 can be disposed on one side of the fixed-focus module 410 to compensate for the negative lens. Based on the combination of corneal lens 200 and negative lens 420, the light diverges outward after passing through negative lens 420, and the effect is approximately parallel to a flat plate, so that it is imaged on photosensitive element 411, thereby achieving image correction effect.

[0066] Based on the above embodiments, in one possible implementation, the negative lens 420 may be a concave mirror. Exemplarily, the concave mirror may be one or more of a single concave mirror and a double concave mirror. It is understood that, based on the combination of the corneal lens 200 and the negative lens 420, the approximate effective focal length is calculated as follows:

[0067]

[0068] Where F is the focal length of the combined system of corneal lens 200 and negative lens 420, f1 is the focal length of corneal lens 200, f2 is the focal length of negative lens 420, d is the gap between corneal lens 200 and negative lens 420, and t1 is the thickness of corneal lens 200. F can be set as large as possible according to actual application requirements. For example, F = 1000mm to meet testing and analysis needs. Based on the above formula, the approximate effective focal length of the prescription lens can be estimated, thus allowing for the appropriate selection of the negative lens 420 in practical operation.

[0069] Continue to refer to Figure 3Based on the above embodiments, the negative lens 420 can be a plano-concave lens, and the side of the plano-concave lens facing the filter medium 500 can be a first plane 421. In one possible implementation, the outward-facing side of the corneal lens 200 can be a convex surface 210, while the inward-facing side of the corneal lens 200 can be a second plane 220. The simulated iris 300 can then be located on the side of the corneal lens 200 with the second plane 220, facilitating the application of the simulated iris 300. When the filter medium 500 is an absorptive filter 510, the first plane 421 of the plano-concave lens is positioned facing the absorptive filter 510, facilitating the application of the absorptive filter 510.

[0070] refer to Figure 4 Based on the above embodiments, in another possible implementation, since the corneal lens 200 simulates the shape of the human eye, the outward-facing side of the corneal lens 200 can be a convex surface 210, while the inward-facing side can be a concave surface 230, thus making the corneal lens 200 a meniscus structure. The simulated iris 300 can be located on the side of the corneal lens 200 with the concave surface 230. In this embodiment, since the inward-facing side of the corneal lens 200 is concave, the concave surface 230 of the corneal lens 200 and the simulated iris 300 together define an inner cavity 240, which can be filled with a gel medium to act as a lens and regulate light. It is understood that the inner cavity 240 can be filled with aqueous humor material. Exemplarily, the inner cavity 240 can be filled with hydrogel, and this embodiment does not limit this.

[0071] Furthermore, in some embodiments of this application, an adjustable lens may be provided along the light-sensing path between the filter medium 500 and the photosensitive element 411, thereby achieving zoom and / or image stabilization. It is understood that providing an adjustable lens can prevent image shake and perform shake compensation, thereby achieving image stabilization.

[0072] Based on the above embodiments, the human eye simulation camera 100 may further include a hollow sphere. In one possible implementation, the photosensitive element 411 may be integrated into the fixed-focus module 410. Alternatively, the photosensitive element 411 may be disposed separately on the sphere. In the case where the photosensitive element 411 is disposed separately on the sphere, it may be located on the inner surface of the sphere. It is understood that, based on contour-mimicking design, the photosensitive element 411 may be a curved surface to adapt to the lens of the human eye. Alternatively, the photosensitive element 411 may be planar; this embodiment does not impose such limitations.

[0073] In the case where the image sensor 411 is integrated into the fixed-focus module 410, such as Figure 3 as well as Figure 4As shown, the human eye simulation camera 100 may further include a camera module 400, with the photosensitive element 411 constituting a part of the camera module 400. It is understood that the camera module 400 typically includes a lens assembly and a photosensitive element 411. The corneal lens 200, negative lens 420, adjustable lens, fixed-focus module 410, and filling medium can collectively constitute the lens assembly.

[0074] refer to Figure 5 as well as Figure 6 Based on the above embodiments, in one possible implementation, a first zoom lens 430 may be provided between the filter medium 500 and the photosensitive element 411. Further, the first zoom lens 430 may include a first substrate 431, a first electrode 432, a liquid crystal molecule alignment film 433, a liquid crystal layer 434, and a first voltage control system 435. In one possible implementation, the number of the first substrate 431, the first electrode, and the liquid crystal molecule alignment film 433 may be at least two; this application embodiment does not impose a limitation. In this application embodiment, an example is given with two first substrates 431, two first electrodes, and two liquid crystal molecule alignment films 433. The two liquid crystal molecule alignment films 433 may be located at opposite ends of the liquid crystal layer 434 in the height direction, the two first electrodes 432 may be located outside the two liquid crystal molecule alignment films 433, the first voltage control system 435 is electrically connected to the first electrodes 432, and the two first substrates 431 may be further located outside the two first electrodes 432. Furthermore, a sealing layer 436 may be provided along the length of the liquid crystal layer 434 to prevent leakage. It is understood that the liquid crystal layer 434 may include a plurality of liquid crystal molecules 4341, which may be arranged side-by-side along the length of the liquid crystal layer 434. Thus, by changing the voltage of the first voltage control system 435, the orientation of the liquid crystal molecules 4341 can be adjusted, thereby changing the refractive index of the liquid crystal layer 434 and achieving zoom.

[0075] In one possible implementation, exemplarily, the first substrate 431 can be made of glass or resin, the first electrode 432 can be made of indium tin oxide (ITO), the liquid crystal alignment film 433 can be made of polyimide (PI), the liquid crystal layer 434 can be composed of nematic liquid crystal (NLC) or cholesteric liquid crystal (CLC), and the sealing layer 436 can be a sealant to seal the liquid crystal layer 434. It is understood that the first zoom lens 430 enables the liquid crystal layer 434 to be changed via electrical drive to achieve zoom, with high adjustment precision, smooth focal length change, rapid response of the liquid crystal molecules 4341, and high zoom efficiency.

[0076] refer to Figure 7 as well as Figure 8 Based on the above embodiments, in one possible implementation, a second zoom lens 440 may be provided between the filter medium 500 and the photosensitive element 411. Further, the second zoom lens 440 may include a second substrate 441, a second transparent film 442, a motor 443, and a push-pull control system 444. The second transparent film 442 may be located on the upper surface of the second substrate 441 in the height direction, and the interior of the second transparent film 442 has a second cavity 4421, wherein a transparent liquid 445 may be provided within the second cavity 4421. The push-pull control system 444 may be located at both ends of the second transparent film 442 in the length direction, and the motor 443 and the push-pull control system 444 are electrically connected. In one possible implementation, the push-pull control system 444 may include a piston structure 4441. In this embodiment, the piston structure 4441 is annular. In this way, the motor 443 drives the piston structure 4441 to move inward, thereby squeezing the second transparent film 442. Correspondingly, the motor 443 drives the piston structure 4441 to move outward, thereby stretching the second transparent film 442. By controlling the piston structure 4441 to squeeze or stretch the second transparent film 442 with the motor 443, the shape of the second transparent film 442 is changed while keeping the volume of the transparent liquid 445 constant, so as to adjust the radius of curvature of the second zoom lens 440, making the curvature of the second transparent film 442 change in a gradient, and realizing the change of optical power from positive to negative.

[0077] In one possible implementation, exemplarily, the second substrate 441 can be a transparent optical plate, the second transparent film 442 can be made of thermoplastic polyurethane elastomer (TPU), and the transparent liquid 445 has a certain refractive index, facilitating changes in the radius of curvature of the second zoom lens 440. It is understood that the arrangement of the second zoom lens 440 can mechanically drive changes in the distribution of the transparent liquid 445 within the second cavity 4421, thereby achieving zooming.

[0078] refer to Figure 9 , Figure 10 as well as Figure 11Based on the above embodiments, in one possible implementation, a third zoom lens 450 may be provided between the filter medium 500 and the photosensitive element 411. Further, the third zoom lens 450 may include a third housing 451 and a third transparent film 452. The third transparent film 452 is located inside the third housing 451, and the third housing 451 can be divided into a first chamber 453 and a second chamber 454 by the third transparent film 452. Additionally, a first inlet 455 may be provided on one side of the third housing 451, and the first inlet 455 is connected to the first chamber 453. Correspondingly, a second inlet 456 may be provided on the other side of the third housing 451, and the second inlet 456 is connected to the second chamber 454. A first liquid 457 can be injected into the first chamber 453 through the first inlet 455, while a second liquid 458 can be injected into the second chamber 454 through the second inlet 456. It is understood that, as Figure 10 As shown, in the initial state, the first liquid 457 and the second liquid 458 are located in the first chamber 453 and the second chamber 454, respectively. At this time, the surface of the third transparent film 452 is flat and has no curvature change. Figure 11 As shown, with the continuous injection of the first liquid 457 and the second liquid 458, the third transparent film 452 can be deformed under force, thereby changing the radius of curvature of the third zoom lens 450 and achieving the purpose of zooming.

[0079] Based on the above embodiments, it is understood that the first liquid 457 and the second liquid 458 cannot permeate the third transparent film 452, and the first liquid 457 and the second liquid 458 cannot be miscible. In one possible implementation, the third shell 451 can be made of glass or resin, and the first liquid 457 and the second liquid 458 can be made of materials with a refractive index similar to that of the lens of a real human eye. Furthermore, the thickness of the third transparent film 452 should not be too thin, as the first liquid 457 and the second liquid 458 may be affected by gravity during eyeball rotation, thus preventing deformation of the third transparent film 452 caused by this gravitational influence. The third zoom lens 450 enables zooming by deforming the surface of the third transparent film 452 through liquid filling.

[0080] refer to Figure 12 , Figure 13 as well as Figure 14Based on the above embodiments, in one possible implementation, the filter medium 500 and the photosensitive element 411 may be provided with a fourth zoom lens 460. Further, the fourth zoom lens 460 may include a fourth housing 461, a fourth electrode 462, and a fourth voltage control system 463. The fourth housing 461 has a fourth cavity 4611 inside, containing a third liquid 464 and a fourth liquid 465. The third liquid 464 may be a conductive liquid, and the fourth liquid 465 may be an insulating liquid. A hydrophobic layer 466 may also be provided inside the fourth housing 461 to prevent liquid from penetrating into the housing. In one possible implementation, the number of fourth electrodes 462 may be at least two, which is not limited in this embodiment. In this embodiment, two fourth electrodes 462 are used as an example. The two fourth electrodes 462 may be located on one side of the fourth housing 461, and the fourth voltage control system 463 and the fourth electrodes 462 are electrically connected. In this way, by changing the voltage of the fourth voltage control system 463, the contact angle between the third liquid 464 and the fourth liquid 465 is changed, and the surface curvature of the interface between the third liquid 464 and the fourth liquid 465 is changed, so as to adjust the radius of curvature of the fourth zoom lens 460, thereby achieving zoom.

[0081] It should be noted that, in combination Figure 13 as well as Figure 14 The contact angle between the electrowetting medium and the insulating layer is changed by applying an external voltage. Electrowetting is a phenomenon where the wettability (i.e., contact angle) of a liquid on a solid surface is altered by applying a voltage. This process involves applying an electric field between the liquid and the solid, thereby changing the surface tension and contact angle of the liquid. It is understood that the third liquid 464 and the fourth liquid 465 have different refractive indices and are immiscible. The fourth zoom lens 460 is configured to deform the interface between the third liquid 464 and the fourth liquid 465 by changing the contact angle of the electrowetting fluid, thus achieving zoom.

[0082] Based on the above embodiment, an insulating film may be present between the third liquid 464 and the fourth liquid 465. The calculation of the contact angle is shown in the following formula:

[0083]

[0084] Where θ is the contact angle, γ wc γ is the interfacial tension between the fourth shell 461 and the third liquid 464. wi γ is the interfacial tension between the fourth shell 461 and the fourth liquid 465. ci The interfacial tension between the third liquid 464 and the fourth liquid 465 is given by ∈, where is the dielectric constant of the insulating film, and d is the dielectric constant of the insulating film.f Let V be the thickness of the insulating film and V be the applied voltage. Calculations show that the refractive power of the liquid surface can be derived using the above equation. The calculation of the refractive power of the liquid surface is shown in the following formula:

[0085]

[0086] Where D0 is the diopter in the closed state, R is the radius of the fourth housing 461, and n c Let n be the refractive index of the third liquid 464. i 465 is the refractive index of the fourth liquid.

[0087] refer to Figure 15 , Figure 16 as well as Figure 17 Based on the above embodiments, in one possible implementation, a fifth zoom lens 470 may be provided between the filter medium 500 and the photosensitive element 411. Further, the fifth zoom lens 470 may include a fifth transparent film 471, a fifth electrode 472, and a fifth voltage control system 473. The fifth transparent film 471 has a fifth cavity 4711 inside, wherein the fifth cavity 4711 may contain a fifth liquid 474. In one possible implementation, the number of fifth electrodes 472 may be at least two, and this application embodiment does not limit this. In this application embodiment, two fifth electrodes 472 are used as an example. The two fifth electrodes 472 are respectively located on the outer surface of the fifth transparent film 471, and the two fifth electrodes 472 are arranged parallel to each other in the length direction of the fifth transparent film 471. Each fifth electrode 472 may include an upper electrode 4721 and a lower electrode 4722, which are disposed along the height of the fifth transparent film 471. The fifth voltage control system 473 and the fifth electrode 472 are electrically connected. Thus, by changing the voltage of the fifth voltage control system 473, the two parallel fifth electrodes 472 are drawn closer to each other due to electrostatic attraction. This causes the upper electrode 4721 and at least a portion of the fifth transparent film 471 to move towards the lower electrode 4722 by electrostatic force. The fifth liquid 474 within the fifth transparent film 471 is compressed and moves towards the center, thereby changing the curvature of the fifth transparent film 471 to adjust the radius of curvature of the fifth zoom lens 470, achieving zoom.

[0088] It is understandable that, such as Figure 16 As shown, in the absence of voltage, the surface of the fifth transparent film 471 is flat and shows no change in curvature. Figure 17As shown, after the fifth voltage control system 473 is activated and a voltage is applied, the fifth transparent film 471 is deformed under force, thereby changing the radius of curvature of the fifth zoom lens 470 and achieving zoom. The fifth zoom lens 470 is configured to deform the surface of the fifth transparent film 471 through electrostatic force, thereby achieving zoom.

[0089] refer to Figure 18 , Figure 19 as well as Figure 20 Based on the above embodiments, in one possible implementation, a sixth zoom lens 480 may be provided between the filter medium 500 and the photosensitive element 411. Further, the sixth zoom lens 480 may include a sixth transparent film 481, magnets 482, and an electromagnetic control system 483. The sixth transparent film 481 has a sixth cavity 4811, wherein the sixth cavity 4811 may contain a sixth liquid 484. In one possible implementation, the number of magnets 482 may be at least two, and this application embodiment does not limit this. In this application embodiment, two magnets 482 are used as an example. Both magnets 482 can be located on the outer surface of the sixth transparent film 481, and the electromagnetic control system 483 and the magnets 482 are electrically connected. In this way, the electromagnetic control system 483 drives the magnet 482 to move in the height direction, and the sixth liquid 484 in the sixth transparent film 481 is squeezed and moves towards the center position, thereby causing at least part of the sixth transparent film 481 to deform, so as to adjust the radius of curvature of the sixth zoom lens 480, thereby achieving zoom.

[0090] Based on the above embodiments, by way of example, magnet 482 can be a ring-shaped neodymium magnet 482, and this application embodiment is not limited thereto. It is understood that, as Figure 19 As shown, with the electromagnetic control system 483 off, the surface of the sixth transparent film 481 is flat and has no curvature change. Figure 20 As shown, after the electromagnetic control system 483 is activated, the sixth transparent film 481 is deformed by force, thereby changing the radius of curvature of the sixth zoom lens 480 and achieving zoom. The sixth zoom lens 480 is configured to deform the surface of the sixth transparent film 481 by means of electromagnetic force, thereby achieving zoom.

Claims

1. A human eye simulation camera, characterized in that, It includes a corneal lens, a simulated iris, and a photosensitive element arranged sequentially along the photosensitive path. The simulated iris has a simulated pupil at its center, and a filter medium for infrared cutoff is provided between the simulated pupil and the photosensitive element.

2. The human eye simulation camera according to claim 1, characterized in that, The filtering medium is an absorption filter, which is disposed on the side of the simulated iris facing away from the corneal lens.

3. The human eye simulation camera according to claim 2, characterized in that, An adhesive layer is provided between the simulated iris and the filter medium, and the refractive index of the adhesive layer is the same as that of the simulated pupil.

4. The human eye simulation camera according to claim 3, characterized in that, The adhesive layer is black.

5. The human eye simulation camera according to claim 1, characterized in that, The filtering medium is a first reflective filter that is tilted relative to the photosensitive path.

6. The human eye simulation camera according to claim 5, characterized in that, Also includes: A first sensor is positioned on the reflection path of the first reflective filter.

7. The human eye simulation camera according to claim 6, characterized in that, Also includes: A second reflective filter is located between the first reflective filter and the photosensitive element on the photosensitive path, and the second reflective filter is inclined relative to the photosensitive path. The second reflective filter is used to reflect ultraviolet light.

8. The human eye simulation camera according to claim 7, characterized in that, Also includes: A second sensor is positioned on the reflection path of the second reflective filter.

9. The human eye simulation camera according to claim 1, characterized in that, A privacy layer is provided between the filter medium and the simulated iris.

10. The human eye simulation camera according to claim 9, characterized in that, The filter medium is a single-layer or double-layer polarizer, and the absorption axis angle of the double-layer polarizer is 0~90°.

11. The human eye simulation camera according to claim 9, characterized in that, The privacy layer and the simulated pupil are made of the same material.

12. The human eye simulation camera according to any one of claims 1 to 11, characterized in that, It also includes at least two lenses disposed between the filter medium and the photosensitive element along the photosensitive path, and the lens closest to the filter medium is a negative lens.

13. The human eye simulation camera according to claim 12, characterized in that, The negative lens is a plano-concave lens, and the plane of the plano-concave lens faces the filter medium.

14. The human eye simulation camera according to any one of claims 1 to 11, characterized in that, The corneal lens and the simulated iris together define an inner cavity, which is filled with a gel medium.

15. The human eye simulation camera according to any one of claims 1 to 11, characterized in that, It also includes an adjustable lens disposed between the filter medium and the photosensitive element along the photosensitive path.

16. The human eye simulation camera according to any one of claims 1 to 11, characterized in that, It also includes a hollow sphere, with the photosensitive element disposed on the inner surface of the sphere.

17. The human eye simulation camera according to any one of claims 1 to 11, characterized in that, It also includes a camera module, and the photosensitive element constitutes part of the camera module.

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