Bionic eye vision system

Abstract

The present application relates to a kind of bionic human eye vision system, belong to the cross-disciplinary technical field of biomedical and optics.The whole system is placed on unified optical platform, including white light source, linear motorized translation stage, observed target, band-pass filter, achromatic lens, polaroid, electrically controlled diaphragm, artificial lens, scanning lens, two-dimensional galvanometer, beam splitter, beam quality analyzer, full mirror, lens, high-sensitivity photodetector and computer.The advantage is novel structure, through high-sensitivity detector and feedback control circuit can realize automatic adjustment system light quantity size, prevent overexposure, through adjusting artificial lens and two-dimensional galvanometer can realize detecting different distance, different angle object, so as to simulate the basic function of human eye, can gather and process image in complex environment.

Description

Technical Field

[0001] This invention belongs to the interdisciplinary field of biomedicine and optics, and specifically relates to a bionic human eye vision system that simulates the human eye to image various complex external environments. Background Technology

[0002] Currently, research on bionic human eye visual systems has made some progress, especially in simulating the basic optical transmission and image acquisition of the human eye. For example, some existing technologies use fixed white light sources, preset filters, standard lens combinations, and mechanical apertures to simulate the imaging process of the human eye, thereby evaluating the optical performance and image quality of artificial lenses. However, existing technologies have several shortcomings: First, traditional methods usually rely on precision optical testing instruments to evaluate imaging performance through complex optical parameter measurements. However, these methods are costly, complex to operate, and have stringent testing environment requirements, often failing to reflect the actual situation inside the patient's eye. Second, current methods for controlling the amount of light entering the system mostly use fixed mechanisms or preset programs, lacking real-time self-feedback adjustment mechanisms. Traditional methods generally adjust the amount of incident light through mechanical apertures, but cannot automatically optimize adjustment parameters based on real-time image quality and light intensity information from sensors. This results in the system struggling to maintain optimal imaging conditions in environments with significant changes in lighting conditions. This is especially crucial when evaluating intraocular lenses, because the imaging quality of intraocular lenses is affected by many factors such as incident light intensity, beam distribution, and optical aberrations. A single preset adjustment cannot meet the requirements for high-quality imaging in changing environments. Summary of the Invention

[0003] This invention provides a bionic human eye vision system to simulate the human eye's ability to collect and process images in complex and ever-changing environments.

[0004] The technical solution adopted in this invention is as follows: A beam of light emitted from a white light source illuminates the target being observed. The target is mounted on a linear motorized translation stage. The beam passes through a 546nm bandpass filter and an achromatic lens, then through polarizers one and two. After that, the beam passes through an electrically controlled aperture one and is focused by an artificial lens at an electrically controlled aperture two. After exiting the electrically controlled aperture two, the beam passes through a scanning lens and a two-dimensional galvanometer. After being reflected by the two-dimensional galvanometer, the beam is split by a beam splitter. The transmitted beam is focused by the achromatic lens two and then enters a beam quality analyzer for imaging, while the reflected beam is reflected by a total reflection mirror, then focused by a lens and enters a high-sensitivity detector to detect the light intensity. Both the beam quality analyzer and the high-sensitivity detector are connected to a computer, and the collected image and light intensity information are processed by the computer.

[0005] The entire system described in this invention is placed on a unified optical platform, wherein the white light source, the target being observed, the 546nm bandpass filter, the achromatic lens one, the polarizer one, the polarizer two, the electrically controlled aperture one, the artificial lens, the electrically controlled aperture two, and the scanning lens are at the same height and coaxial, and the target being observed is placed on the front focal plane of the achromatic lens one.

[0006] The white light source described in this invention uses a white LED lamp.

[0007] The focal length of the achromatic lens described in this invention is 160mm.

[0008] The polarizer 2 described in this invention is placed on an electrically controlled rotational displacement platform and connected to a computer. After the light beam passes through the polarizer 1, it becomes linearly polarized light. By controlling the rotation of the polarizer 2, the angle between the polarization angles of the two polarizers is changed, thereby adjusting the intensity of the incident light.

[0009] The electronically controlled aperture 1 described in this invention is connected to a computer to simulate the pupil. The field of view and the amount of light entering the eye are adjusted by adjusting the size of the electronically controlled aperture 1.

[0010] The electronically controlled aperture 2 described in this invention is used to simulate the macula, and its position is adjusted to determine the center position of the field of view.

[0011] The two-dimensional galvanometer described in this invention is used to simulate eye movement and to accurately detect a certain area by adjusting it.

[0012] The beam quality analyzer described in this invention employs a beam profiler.

[0013] The present invention uses a high-sensitivity detector to detect the light intensity and feeds it back to polarizer two and electronically controlled aperture one. By adjusting them, the amount of light entering the device can be adjusted to prevent overexposure.

[0014] The advantages of this invention are its novel structure. Through a highly sensitive detector and feedback control circuit, it can automatically adjust the amount of light entering the system to prevent overexposure. By adjusting the artificial lens and two-dimensional galvanometer, it can detect objects at different distances and angles, thus simulating the basic functions of the human eye and enabling the collection and processing of images in complex environments.

[0015] This invention eliminates the need for complex traditional optical parameter calculations. Instead, it directly assesses image clarity and light intensity distribution by acquiring images output from the imaging device. By observing the sharpness of details and the uniformity of light intensity in the image, the imaging performance of the intraocular lens (IOL) under different operating conditions can be quickly understood, providing a reference for clinical vision prediction. This invention uses computer-aided intelligent analysis of light intensity and image data from the detector to dynamically adjust the polarizer angle and the size of the electrically controlled aperture, effectively adapting to changes in ambient light and achieving real-time optimization of light intake to ensure optimal imaging performance under various lighting conditions. Furthermore, the system incorporates a simulated two-dimensional galvanometer and a mechanical displacement platform, accurately simulating eye rotation, focusing, and pupillary changes. This realistically reproduces the dynamic visual performance of the eye at different angles and focal lengths, thereby improving the accuracy of evaluating the multifocal and continuous-range characteristics of the IOL.

[0016] This invention achieves dynamic evaluation and optimization of intraocular lens imaging quality through a real-time monitoring method based on image sharpness and light intensity distribution, combined with self-feedback adjustment technology. This system not only overcomes the problems of discontinuous detection and slow response in complex environments found in traditional technologies, but also boasts advantages such as ease of operation, low cost, and strong adaptability, demonstrating a high level of technical sophistication and broad application prospects. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a bionic human eye visual system;

[0018] The components include: 1. White light source (white LED lamp); 2. Linear motorized translation stage (300 mm travel); 3. Observed target (USAAF, 1951 resolution target); 4. 546 nm bandpass (BF) filter; 5. Achromatic lens I (focal length 160 mm); 6. Polarizer I; 7. Polarizer II; 8. Electrically controlled aperture I; 9. Intraocular lens; 10. Electrically controlled aperture II; 11. Scanning lens; 12. Two-dimensional galvanometer; 13. Beam splitter; 14. Achromatic lens II; 15. Beam quality analyzer (BC207VIS beam profiler, Thorlabs); 16. Total reflection mirror; 17. Lens; 18. High-sensitivity detector; 19. Computer. Detailed Implementation

[0019] The invention will now be described with reference to the accompanying drawings, such as... Figure 1As shown, the beam emitted by the white light source 1 illuminates the observed target 3, which is mounted on a linear motorized translation stage 2. The beam passes through a 546nm bandpass filter 4 and an achromatic lens 5, then through a polarizer 6 and a polarizer 7. After that, the beam passes through an electrically controlled aperture 8 and is focused by an artificial lens 9 at an electrically controlled aperture 10. After exiting the electrically controlled aperture 10, the beam passes through a scanning lens 11 and a two-dimensional galvanometer 12. After being reflected by the two-dimensional galvanometer 12, the beam is split by a beam splitter 13. The transmitted beam is focused by an achromatic lens 14 and enters the beam quality analyzer 15 for imaging, while the reflected beam is reflected by a total reflection mirror 16 and then focused by a lens 17 before entering a high-sensitivity detector 18 to detect the light intensity. Both the beam quality analyzer 15 and the high-sensitivity detector 18 are connected to a computer 19, and the collected image and light intensity information are processed by the computer 19.

[0020] The entire system is placed on a unified optical platform, in which the white light source 1, the observed target 3, the 546nm bandpass filter 4, the achromatic lens 5, the polarizer 6, the polarizer 7, the electrically controlled aperture 8, the artificial lens 9, the electrically controlled aperture 10, and the scanning lens 11 are at the same height and coaxial. The observed target 3 is placed on the front focal plane of the achromatic lens 5.

[0021] The white light source is a white LED lamp 1.

[0022] The focal length of the achromatic lens-5 is 160mm.

[0023] The second polarizer 7 is placed on an electrically controlled rotational displacement platform and connected to the computer 19. After the light beam passes through the first polarizer 6, it becomes linearly polarized light. By controlling the rotation of the second polarizer 7, the angle between the polarization angles of the two polarizers is changed, thereby adjusting the intensity of the incident light.

[0024] The electronically controlled aperture 8 is connected to the computer 19 and is used to simulate the pupil. The field of view and the amount of light entering the eye can be adjusted by adjusting the size of the electronically controlled aperture 8.

[0025] The electronically controlled aperture 10 is used to simulate the macula, and its position is adjusted to determine the center of the field of view.

[0026] The function of the two-dimensional galvanometer 12 is to simulate eye movement and to achieve precise detection of a certain area by adjusting it.

[0027] The beam quality analyzer 15 is a beam profiler (BC207VIS, Thorlabs).

[0028] The intensity of light detected by the high-sensitivity detector 18 is fed back to the polarizer 7 and the electronically controlled aperture 8. By adjusting them, the amount of light entering the camera is adjusted to prevent overexposure.

[0029] Working principle:

[0030] like Figure 1 As shown, the white light source is a white LED lamp 1, and the observed target 3 is a US Air Force (USAF) 1951 resolution target 3, which is mounted on a linearly maneuverable translation platform 2 with a travel of 300 mm. The light emitted by the white LED lamp 1 illuminates the target 3. The observed target is placed on the linearly maneuverable platform, which allows the target's position to be adjusted to simulate the human eye's observation of near-field and far-field objects. The light beam passing through the observed object passes through a 546 nm bandpass filter 4 and a 160 mm focal length achromatic lens 5. The 546 nm bandpass filter is used to simulate the human eye's sensitivity to light around 546 nm. Then, it passes through two polarizers. Polarizer 7 is placed on an electrically controlled rotating translation platform. After passing through polarizer 6, the light beam becomes linearly polarized. By controlling the polarizer... The rotation of the second polarizer 7 changes the angle between the two polarizers, thereby adjusting the intensity of the incident light. This can simulate the measurement of the image clarity of the visual system under different light intensities. The beam then passes through the first electrically controlled aperture 8 and is converged at the second electrically controlled aperture 10 by the artificial lens 9. The first electrically controlled aperture 8 is used to simulate the pupil. The field of view and the amount of light can be adjusted by adjusting the size of the aperture. The artificial lens 9 is adjusted to make the system image clear. The second electrically controlled aperture 10 is used to simulate the macula. Adjusting its position determines the center position of the field of view. After the beam exits from the second electrically controlled aperture, it passes through the scanning lens 11 and the two-dimensional galvanometer 12. The function of the two-dimensional galvanometer 12 is to simulate the rotation of the eyeball and thus simulate the macula to accurately detect a certain area. After being reflected by a two-dimensional galvanometer 12, the light beam is split by a beam splitter 13. The transmitted beam is converged by an achromatic lens 14 and then enters the beam quality analyzer for imaging. Here, a beam profilometer (BC207VIS, Thorlabs) 15 is used as the beam quality analyzer. The reflected beam is then reflected by a total reflection mirror 16 and converged by a lens 17 before entering a high-sensitivity detector 18 to detect the light intensity. Polarizer 7, electrically controlled aperture 8, beam profilometer 15, and high-sensitivity detector 18 are all connected to a computer 19. The software analyzes the image and light intensity information collected by the beam profilometer 15 and high-sensitivity detector 18. Based on the analysis results, polarizer 7 is rotated and the size of electrically controlled aperture 8 is changed to adjust the amount of light entering the system, preventing overexposure and ensuring that the system images under appropriate light intensity.

Claims

1. A biomimetic human eye vision system, characterized by: The light beam emitted by the white light source illuminates the observed target, which is installed on a linear motorized translation stage. The light beam passes through a 546 nm band-pass filter and an achromatic lens, then passes through polarizer I and polarizer II, and then passes through an electrically controlled diaphragm I, converges through an artificial lens, and reaches an electrically controlled diaphragm II. After the light beam passes through the electrically controlled diaphragm II, it passes through a scanning lens and a two-dimensional galvanometer, and then is reflected by the two-dimensional galvanometer. The reflected light beam passes through a beam splitter, and the transmitted light beam converges through an achromatic lens II and enters a beam quality analyzer to form an image. The reflected light beam is reflected by a total reflection mirror, then converges through a lens, and enters a high-sensitivity detector to detect the light intensity. The beam quality analyzer and the high-sensitivity detector are connected to a computer, and the images and light intensity information collected by them are processed by the computer. The polarizer II is placed on an electrically controlled rotating displacement platform and connected to the computer. After the light beam passes through the polarizer I, it becomes linearly polarized light. By controlling the rotation of the polarizer II, the included angle between the polarization angles of the two polarizers can be changed, and thus the incident light intensity can be adjusted. The electrically controlled diaphragm I is connected to the computer and used to simulate the pupil. By adjusting the size of the electrically controlled diaphragm I, the field of view and the amount of light entering can be adjusted.

2. The biomimetic human eye vision system of claim 1, wherein: The bionic human eye vision system is placed on a unified optical platform, in which the white light source, the observed target, the 546 nm band-pass filter, the achromatic lens I, the polarizer I, the polarizer II, the electrically controlled diaphragm I, the artificial lens, the electrically controlled diaphragm II, and the scanning lens are unified in height and coaxial. The observed target is placed on the front focal plane of the achromatic lens I.

3. The biomimetic human eye vision system of claim 1, wherein: The white light source uses a white LED lamp.

4. The biomimetic human eye vision system of claim 1, wherein: The focal length of the achromatic lens I is 160 mm.

5. The biomimetic human eye vision system of claim 1, wherein: The electrically controlled diaphragm II is used to simulate the macula, and the position of the field of view center can be determined by adjusting the position of the electrically controlled diaphragm II.

6. The biomimetic human eye vision system of claim 1, wherein: The two-dimensional galvanometer is used to simulate the rotation of the eyeball, and precise detection of a certain area can be achieved by adjusting it.

7. The biomimetic human eye vision system of claim 1, wherein: The beam quality analyzer uses a beam profiler.

8. The biomimetic human eye vision system of claim 1, wherein: The light intensity detected by the high-sensitivity detector is fed back to the polarizer II and the electrically controlled diaphragm I, and the amount of light entering is adjusted by adjusting them to prevent overexposure.

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