Eye-tracking apparatus and method, and near-eye display device
By recording and reproducing beam information and obtaining images of the beam reflected by the human eye using holographic optical elements, the problem of light source obstruction in near-eye display devices is solved, improving the visible area and user experience.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- ZHUHAI MOJIE TECH CO LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-07-09
AI Technical Summary
Existing near-eye display devices typically require a light source to be placed on the lens when calculating the human eye's fixation point by forming a Purchin spot by illuminating the eyeball with a light beam. This results in obstruction of the human eye and affects the visible area.
Holographic optical elements are used to record and reproduce beam information, and the target image formed by the beam reflected from the human eye is obtained through a camera component, thus realizing eye tracking. This avoids placing a light source or camera component at the human eye position and reduces occlusion by utilizing the high light transmittance of holographic optical elements.
It increases the visible area of the human eye, reduces obstruction to the human eye, and improves the user experience of near-eye display devices.
Smart Images
Figure CN2025101854_09072026_PF_FP_ABST
Abstract
Description
Eye-tracking device, method and near-eye display device
[0001] This application claims priority to Chinese Patent Application No. 2024119977407, filed with the Chinese Patent Office on December 31, 2024, entitled "Eye Tracking Device, Method and Near-Eye Display Device", the entire contents of which are incorporated herein by reference. Technical Field
[0002] This application relates to the field of eye-tracking technology, and more particularly to an eye-tracking device, method, and near-eye display device. Background Technology
[0003] Current near-eye display devices typically use the Purkinje spot, formed by a beam of light shining on the eyeball, as a reference point to calculate the position of the eye's gaze. Therefore, a light source usually needs to be placed at a position relative to the eye, such as an infrared LED on the lens of smart glasses, which obstructs the user's line of sight. How to reduce the obstruction to the eye by eye-tracking devices and increase the visible area of near-eye display devices to improve the user experience has become an urgent problem to be solved. Summary of the Invention
[0004] The main objective of this application is to provide an eye-tracking device, method, and near-eye display device, which aims to reduce the obstruction of the human eye by the eye-tracking device and increase the visible area of the human eye.
[0005] In a first aspect, this application provides an eye-tracking device, the eye-tracking device comprising:
[0006] A light source assembly for providing a reproduced light beam;
[0007] A holographic optical element, wherein the holographic optical element is used to reproduce an illumination beam under the illumination of the reproduced beam;
[0008] A camera component is used to acquire a target image formed by a first reflected beam obtained by the illumination beam being reflected by the human eye, so as to realize eye tracking based on the target image.
[0009] In some embodiments, the holographic optical element has a preset reflectivity, and the holographic optical element is further used to reflect the first reflected beam to obtain a second reflected beam; the camera assembly is used to acquire a target image formed by the second reflected beam obtained by reflecting the first reflected beam through the holographic optical element.
[0010] In some embodiments, the holographic optical element has a preset transmittance, and the eye-tracking device further includes a first reflection module, which is used to reflect the first reflected beam to obtain a second reflected beam; the camera component is used to acquire a target image formed by the second reflected beam obtained by reflecting the first reflected beam through the first reflection module.
[0011] In some embodiments, the eye-tracking device further includes a second reflection module, which is used to reflect the second reflected beam to obtain a third reflected beam, the third reflected beam being used to form a target light spot in the target image of the camera component.
[0012] In some embodiments, the eye-tracking device further includes a beam-splitting module disposed opposite to the light source assembly and the camera assembly, for reflecting a fourth reflected beam from the third reflected beam to form the target spot in the target image.
[0013] In some embodiments, the beam splitter module includes a semi-reflective lens, on which a polarizing optical element is disposed.
[0014] Secondly, this application also provides a near-eye display device, which includes the eye-tracking device described in any one of the embodiments of this application.
[0015] In some embodiments, the near-eye display device further includes a display light source assembly and an optical waveguide assembly, wherein the display light source assembly is used to provide an image display beam;
[0016] The optical waveguide assembly is provided with an input module and an output module. The input module is used to couple the image display beam into the optical waveguide assembly for transmission, and the output module is used to couple the image display beam transmitted within the optical waveguide assembly out of the optical waveguide assembly. The image display beam is used to display a preset virtual image.
[0017] Thirdly, this application also provides an eye-tracking method, wherein the eye-tracking method is applied to the eye-tracking device described in any one of the embodiments of this application, the eye-tracking device comprising:
[0018] A light source assembly for providing a reproduced light beam;
[0019] A holographic optical element, wherein the holographic optical element is used to reproduce an illumination beam under the illumination of the reproduced beam;
[0020] A camera assembly, wherein the camera assembly is used to acquire a target image formed by a first reflected beam obtained by the illumination beam being reflected by the human eye;
[0021] The method includes:
[0022] Acquire the target image of the camera component;
[0023] The target spot is identified in the target image to obtain the current position of the target spot;
[0024] Based on the current position, the target angle between the illumination beam and the first reflected beam is determined to achieve eye tracking.
[0025] In some embodiments, determining the target angle between the illumination beam and the first reflected beam based on the current position to achieve eye tracking includes:
[0026] Based on the preset spot position, determine the target distance between the current position and the preset spot position;
[0027] Based on the correspondence between the target distance and the target angle, the target angle between the illumination beam and the first reflected beam is determined to achieve eye tracking.
[0028] This application provides an eye-tracking device, method, and near-eye display device. The eye-tracking device includes: a light source assembly for providing a reproduced light beam; a holographic optical element for reproducing an illumination beam under the illumination of the reproduced light beam; and a camera assembly for acquiring a target image formed by a first reflected beam obtained by the illumination beam reflecting off the human eye, so as to achieve eye tracking based on the target image. The eye-tracking device provided by this application illuminates the holographic optical element with the reproduced light beam provided by the light source assembly, causing the holographic optical element to reproduce the illumination beam, and acquires the target image formed by the first reflected beam obtained by the illumination beam reflecting off the human eye through the camera assembly. This avoids placing the illumination source or camera assembly at a position opposite to the human eye, avoids obstruction of the human eye by the eye-tracking device, and increases the visible area of the human eye. Attached Figure Description
[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0030] Figure 1 is a schematic block diagram of an eye-tracking device according to an embodiment of this application;
[0031] Figure 2 is a schematic block diagram of an eye-tracking device according to another embodiment of this application;
[0032] Figure 3 is a schematic block diagram of an eye-tracking device according to another embodiment of this application;
[0033] Figure 4 is a schematic block diagram of an eye-tracking device according to another embodiment of this application;
[0034] Figure 5 is a schematic block diagram of an eye-tracking device according to another embodiment of this application;
[0035] Figure 6 is a schematic block diagram of an eye-tracking device according to another embodiment of this application;
[0036] Figure 7 is a schematic block diagram illustrating the relationship between reflection angle and target distance according to an embodiment of this application. Detailed Implementation
[0037] 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 some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0038] The flowchart shown in the attached diagram is for illustrative purposes only and does not necessarily include all content and operations / steps, nor does it necessarily have to be performed in the order described. For example, some operations / steps can be broken down, combined, or partially merged, so the actual execution order may change depending on the actual situation.
[0039] This application provides an eye-tracking device, method, and near-eye display device.
[0040] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0041] Please refer to Figures 1 and 2. Figure 1 is a schematic block diagram of an eye-tracking device according to an embodiment of this application; Figure 2 is a schematic block diagram of an eye-tracking device according to another embodiment of this application.
[0042] As shown in Figure 1, the eye-tracking device provided in this embodiment includes:
[0043] A light source assembly for providing a reproduced light beam;
[0044] A holographic optical element, wherein the holographic optical element is used to reproduce an illumination beam under the illumination of the reproduced beam;
[0045] A camera component is used to acquire a target image formed by a first reflected beam obtained by the illumination beam being reflected by the human eye, so as to realize eye tracking based on the target image.
[0046] For example, a holographic medium is a material capable of recording and storing the amplitude and phase information of a light beam. When two coherent light beams simultaneously illuminate the holographic medium, the two beams interfere with each other in the holographic medium. The amplitude and phase information of the beams are stored in the holographic medium in the form of an interference pattern. When one of the beams illuminates the interference pattern on the holographic medium again, the holographic medium can reproduce the other beam.
[0047] This application utilizes the characteristics of holographic media to record information about the illumination beam used for eye tracking in a holographic optical element made of the holographic medium. When eye tracking is needed, the illumination beam is reproduced simply by illuminating the holographic optical element with the reconstructed beam. The target image obtained by illuminating the human eye with the illumination beam is then acquired by a camera component, and eye tracking is achieved based on the target image. Compared to emitting an illumination beam through LEDs, holographic media typically have higher light transmittance, avoiding obstruction of the human eye and increasing the visible area.
[0048] As shown in Figure 2, when the angle of the human eye's gaze changes, the position where the illumination beam is reflected by the eye changes, thus altering the angle of the first reflected beam. Consequently, the position of the first reflected beam in the target image of the camera component also changes. Therefore, the direction of the human eye's gaze can be determined by acquiring the target image through the camera component and based on the position of the light spot formed by the first reflected beam in the target image, thereby achieving eye tracking. The camera component can be positioned anywhere within the eye-tracking device; no limitation is imposed here.
[0049] In some embodiments, the holographic optical element has a preset reflectivity, and the holographic optical element is also used to reflect the first reflected beam to obtain a second reflected beam; the camera assembly is used to acquire a target image formed by the second reflected beam obtained by reflecting the first reflected beam through the holographic optical element.
[0050] For example, the holographic optical element can be a reflective holographic optical element with a reflective function, meaning the holographic optical element has a certain reflectivity. Besides reproducing the illumination beam, the holographic optical element also reflects the first reflected beam from the human eye to obtain a second reflected beam. The camera component is used to acquire the target image formed by the second reflected beam, thereby improving the flexibility of the camera component's placement. The camera component can be placed closer to the human eye, thus avoiding the occlusion caused by placing it on the opposite side of the eye. Furthermore, by reflecting the first reflected beam using the holographic optical element, an additional reflection module is unnecessary, reducing the complexity of the eye-tracking device.
[0051] Understandably, in order for users to observe objects through holographic optical elements, the holographic optical elements also need to have a certain transmittance.
[0052] Please refer to Figure 3, which is a schematic block diagram of an eye-tracking device according to another embodiment of this application.
[0053] As shown in Figure 3, in some embodiments, the holographic optical element has a preset transmittance, and the eye-tracking device further includes a first reflection module, which is used to reflect the first reflected beam to obtain a second reflected beam; the camera component is used to acquire a target image formed by the second reflected beam obtained by reflecting the first reflected beam through the first reflection module.
[0054] For example, the holographic optical element can also be a transmissive holographic optical element, that is, the holographic optical element has a certain transmittance and reflects the first reflected beam through the first reflection module. The camera component is used to acquire the target image formed by the second reflected beam, thereby improving the flexibility of the camera component's placement. The camera component can be placed closer to the human eye, thus avoiding the occlusion of the human eye caused by placing the camera component on the opposite side. Furthermore, by separating the holographic optical element and the first reflection module, either the holographic optical element or the first reflection module can be replaced individually, improving the flexibility of the eye-tracking device.
[0055] Understandably, in order to avoid the first reflection module from obstructing the human eye, the first reflection module has a certain transmittance while having a reflective function, so that the human eye can observe objects through the first reflection module.
[0056] Please refer to Figure 4, which is a schematic block diagram of an eye-tracking device provided in another embodiment of this application.
[0057] As shown in Figure 4, in some embodiments, the eye-tracking device further includes a second reflection module, which is used to reflect the second reflected beam to obtain a third reflected beam, and the third reflected beam is used to form a target light spot in the target image of the camera component.
[0058] For example, to improve the flexibility of the camera device's placement, the eye-tracking device provided in this application embodiment may further include more reflection modules, such as reflecting the second reflected beam again through a second reflection module to obtain a third reflected beam. The second reflection module can be a reflector. However, this is not a limitation; the eye-tracking device provided in this application embodiment may also include more reflection modules, and no further limitation is made here.
[0059] For example, since the angles of the first reflection module and the second reflection module are fixed, specifically, when producing an eye-tracking device, the first reflection module and the second reflection module can be set to a specific angle. Based on the position of the target light spot formed by the third reflection beam in the target image, the angle of the second reflection beam can be deduced, and the angle of the first reflection beam can be deduced from the angle of the second reflection beam, thereby realizing eye tracking.
[0060] Please refer to Figure 5, which is a schematic block diagram of an eye-tracking device provided in another embodiment of this application.
[0061] As shown in Figure 5, in some embodiments, the eye-tracking device further includes a beam-splitting module, which is positioned opposite to the light source assembly and the camera assembly, and is used to reflect a fourth reflected beam from the third reflected beam to form the target light spot in the target image.
[0062] For example, since the reproduced beam emitted by the light source component needs to illuminate the holographic optical element, in order to avoid the camera component blocking the light source component, a beam splitting module can be set at the position opposite to the light source component and the camera component. That is, a beam splitting module can be set at the intersection of the light output direction of the light source component and the shooting direction of the camera component to split the fourth reflected beam from the third reflected beam for forming the target light spot in the target image.
[0063] Understandably, the beam splitter needs to have a certain reflectivity in order to reflect the fourth reflected beam from the third reflected beam; the beam splitter also needs to have a certain transmittance to avoid blocking the reproduced beam emitted by the light source component.
[0064] In some embodiments, the beam splitter module includes a semi-reflective lens with polarizing optical elements disposed thereon.
[0065] For example, the beam splitting module can be a semi-reflective lens that has both reflection and transmission functions. Since light loses some power when passing through the semi-reflective lens, this lost power can be recovered by setting polarizing optical elements on the semi-reflective lens, thereby increasing the brightness of the target spot in the target image and thus improving the eye tracking accuracy.
[0066] Please refer to Figure 6, which is a schematic block diagram of an eye-tracking device according to another embodiment of this application.
[0067] As shown in Figure 6, when the gaze direction of the human eye shifts, the position of the fourth reflected beam entering the camera component also changes compared to Figure 5, thus forming target light spots at different positions in the target image. Therefore, the reflection angle between the first reflected beam and the illumination beam can be determined based on the position of the target light spot, thereby achieving eye tracking. The relationship between the target light spot position and the reflection angle can be preset according to actual conditions.
[0068] Please refer to Figure 7, which is a schematic block diagram illustrating the correspondence between a reflection angle and a target distance according to an embodiment of this application.
[0069] As shown in Figure 7, assuming the reflection angle between the illumination beam and the first reflected beam is α, and the distance between the human eye and the holographic optical element is d1, then the distance L1 between the intersection of the first reflected beam and the surface of the holographic optical element and the intersection of the illumination ray and the surface of the first holographic optical element is tan(α)*d1. Assuming the distance between the intersection of the illumination beam and the surface of the holographic optical element and the vertical extension of the second reflection module's center downwards is L2, and the angle between the second reflection module and the vertical direction is γ, then the angle between the second reflected beam and the second reflection module is arctan(d2 / (L2-L1))-γ. Assuming the beam splitting module is parallel to the second reflection module, then the angle between the fourth reflected ray and the surface of the imaging component is: θ = γ - (90 - (arctan(d2 / (L2-L1))-γ)) = 2γ - 90 + arctan(d2 / (L2-L1)).
[0070] Assuming the distance between the plane of the camera component and the vertical extension line downward from the center of the beam splitter is L3, the distance d3 = L3 * tan(θ) = L3 * tan(2γ - 90 + arctan(d2 / (L2 - L1))) can be calculated relative to the preset position when the human eye is looking straight ahead, thus determining the relationship between d3 and α.
[0071] This application also provides a near-eye display device, which includes the eye-tracking device described in any one of the embodiments of this application.
[0072] For example, the near-eye display device provided in this application embodiment can be a head-mounted display device such as smart glasses or a smart helmet. The near-eye display device provides the eye-tracking device provided in this application embodiment to determine the position of the human eye's gaze, thereby determining the display position of the virtual image.
[0073] For example, the camera component in the eye-tracking device can be installed at any position on the near-eye display device. Taking smart glasses as an example, the camera component can be installed on the nose pad, temple, or other positions of the smart glasses to acquire the target image of the first reflected beam obtained by the human eye reflecting the illumination beam.
[0074] In some embodiments, the near-eye display device further includes a display light source assembly and an optical waveguide assembly, wherein the display light source assembly is used to provide an image display beam;
[0075] The optical waveguide assembly is provided with an input module and an output module. The input module is used to couple the image display beam into the optical waveguide assembly for transmission, and the output module is used to couple the image display beam transmitted within the optical waveguide assembly out of the optical waveguide assembly. The image display beam is used to display a preset virtual image.
[0076] For example, the display light source component and the light source component of the eye-tracking device are spaced apart, wherein the image display beam emitted by the display light source component and the reproduction beam emitted by the eye-tracking device can propagate through the same optical waveguide component. Since the image display beam emitted by the display light source component is visible light and the reproduction beam emitted by the eye-tracking device is infrared light, the two have different wavelengths and will not interfere with each other.
[0077] This application also provides an eye-tracking method, which is applied to the eye-tracking device described in any one of the embodiments of this application. The eye-tracking device includes:
[0078] A light source assembly for providing a reproduced light beam;
[0079] A holographic optical element, wherein the holographic optical element is used to reproduce an illumination beam under the illumination of the reproduced beam;
[0080] A camera assembly, wherein the camera assembly is used to acquire a target image formed by a first reflected beam obtained by the illumination beam being reflected by the human eye;
[0081] The method includes:
[0082] Acquire the target image of the camera component;
[0083] The target spot is identified in the target image to obtain the current position of the target spot;
[0084] Based on the current position, the target angle between the illumination beam and the first reflected beam is determined to achieve eye tracking.
[0085] For example, the camera component can be communicatively connected to a processor used to implement the eye-tracking method, enabling the camera component to transmit the target image to the processor in real time, whereby the processor identifies the target light spot in the target image. Specifically, since the target light spot has high brightness, its current position in the target image can be identified by a preset pixel brightness threshold. For example, pixels with pixel values greater than the pixel brightness threshold can be identified as pixels constituting the target light spot, thereby determining the size of the target angle based on the current position of the target light spot. Of course, this is not the only method; the identification of the target light spot can also be achieved through other means, which will not be elaborated here.
[0086] In some implementations, determining the target angle between the illumination beam and the first reflected beam based on the current position to achieve eye tracking includes:
[0087] Based on the preset spot position, determine the target distance between the current position and the preset spot position;
[0088] Based on the correspondence between the target distance and the target angle, the target angle between the illumination beam and the first reflected beam is determined to achieve eye tracking.
[0089] For example, the camera components can be calibrated in advance to determine the preset spot position of the first reflected beam in the target beam when the human eye is looking directly ahead. For example, the preset spot position can be located in the center of the target image by adjusting the positions of each reflection module and camera component of the eye-tracking device. Of course, it is not limited to this and is not limited here.
[0090] For example, the target distance between the current position and the preset spot position has a certain correspondence with the target angle between the illumination beam and the first reflected beam. You can refer to the description of the eye-tracking device in the embodiments of this application, which will not be repeated here.
[0091] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.
[0092] It should also be understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. It should be noted that, herein, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.
[0093] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above descriptions are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. An eye-tracking device, wherein, The eye-tracking device includes: A light source assembly for providing a reproduced light beam; A holographic optical element, wherein the holographic optical element is used to reproduce an illumination beam under the illumination of the reproduced beam; A camera component is used to acquire a target image formed by a first reflected beam obtained by the illumination beam being reflected by the human eye, so as to realize eye tracking based on the target image.
2. The eye-tracking device according to claim 1, wherein, The holographic optical element has a preset reflectivity, and the holographic optical element is also used to reflect the first reflected beam to obtain a second reflected beam; the camera component is used to acquire a target image formed by the second reflected beam obtained by reflecting the first reflected beam through the holographic optical element.
3. The eye-tracking device according to claim 1, wherein, The holographic optical element has a preset transmittance, and the eye-tracking device further includes a first reflection module, which is used to reflect the first reflected beam to obtain a second reflected beam; the camera component is used to acquire a target image formed by the second reflected beam obtained by the reflection of the first reflected beam by the first reflection module.
4. The eye-tracking device according to claim 2 or 3, wherein, The eye-tracking device further includes a second reflection module, which is used to reflect the second reflected beam to obtain a third reflected beam, and the third reflected beam is used to form a target light spot in the target image of the camera component.
5. The eye-tracking device according to claim 4, wherein, The eye-tracking device further includes a beam-splitting module, which is positioned opposite the light source assembly and the camera assembly, and is used to reflect a fourth reflective beam from the third reflective beam to form the target light spot in the target image.
6. The eye-tracking device according to claim 5, wherein, The beam splitter module includes a semi-reflective lens, on which polarizing optical elements are disposed.
7. The eye-tracking device according to claim 5, wherein, The beam splitting module is located at the intersection of the light emission direction of the light source component and the shooting direction of the camera component.
8. A near-eye display device, wherein, The near-eye display device includes: The display light source assembly is used to provide an image display beam; An optical waveguide assembly is provided with an input module and an output module. The input module is used to couple the image display beam into the optical waveguide assembly for transmission, and the output module is used to couple the image display beam transmitted within the optical waveguide assembly out of the optical waveguide assembly. The image display beam is used to display a preset virtual image. An eye-tracking device includes a light source assembly, a holographic optical element, and a camera assembly. The light source assembly provides a reconstructed light beam, the holographic optical element reproduces an illumination beam under the illumination of the reconstructed light beam, and the camera assembly acquires a target image formed by a first reflected beam obtained by the illumination beam being reflected by the human eye, so as to achieve eye tracking based on the target image.
9. The near-eye display device according to claim 8, wherein, The display light source component and the light source component of the eye-tracking device are spaced apart.
10. The near-eye display device according to claim 8 or 9, wherein the wavelength of the image display beam is different from that of the reproduced beam.
11. The near-eye display device according to claim 8, wherein, The holographic optical element has a preset reflectivity, and the holographic optical element is also used to reflect the first reflected beam to obtain a second reflected beam; the camera component is used to acquire a target image formed by the second reflected beam obtained by reflecting the first reflected beam through the holographic optical element.
12. The near-eye display device according to claim 8, wherein, The holographic optical element has a preset transmittance, and the eye-tracking device further includes a first reflection module, which is used to reflect the first reflected beam to obtain a second reflected beam; the camera component is used to acquire a target image formed by the second reflected beam obtained by the reflection of the first reflected beam by the first reflection module.
13. The near-eye display device according to claim 8 or 11, wherein, The eye-tracking device further includes a second reflection module, which is used to reflect the second reflected beam to obtain a third reflected beam, and the third reflected beam is used to form a target light spot in the target image of the camera component.
14. The near-eye display device according to claim 13, wherein, The eye-tracking device further includes a beam-splitting module, which is positioned opposite the light source assembly and the camera assembly, and is used to reflect a fourth reflective beam from the third reflective beam to form the target light spot in the target image.
15. The near-eye display device according to claim 14, wherein, The beam splitter module includes a semi-reflective lens, on which polarizing optical elements are disposed.
16. An eye-tracking method, wherein, The eye-tracking method is applied to the eye-tracking device according to any one of claims 1-7 or the near-eye display device according to any one of claims 8-15, and the method includes: Acquire the target image of the camera component; The target spot is identified in the target image to obtain the current position of the target spot; Based on the current position, the target angle between the illumination beam and the first reflected beam is determined to achieve eye tracking.
17. The eye-tracking method according to claim 16, wherein, The step of determining the target angle between the illumination beam and the first reflected beam based on the current position to achieve eye tracking includes: Based on the preset spot position, determine the target distance between the current position and the preset spot position; Based on the correspondence between the target distance and the target angle, the target angle between the illumination beam and the first reflected beam is determined to achieve eye tracking.