Head-mounted visual equipment and eyeball tracking system for same
阅读说明:本技术 头戴式可视设备及用于头戴式可视设备的眼球追踪系统 (Head-mounted visual equipment and eyeball tracking system for same ) 是由 张扣文 郭美杉 宋立通 唐溦 谢剑 于 2018-08-20 设计创作,主要内容包括:头戴式可视设备及用于所述头戴式可视设备的眼球追踪系统,其包括一屏幕,用于投射一虚拟场景图像至使用者的眼球,一VR(Virtual Reality)光学透镜,用于在所述屏幕和该使用者的眼球之间构建一光学路径;以及,一眼球追踪系统,用于检测该使用者的眼球的视线方向。所述眼球追踪系统包括:至少一光源,用于投射一检测光至该使用者的眼球;以及,一接收模组,用于接收自该使用者的眼球处所反射的该检测光,其中,所述接收模组位于所述VR光学透镜的侧部,并朝向该使用者的眼球,以使得自该使用者的眼球处所反射的该检测光直接被所述接收模组所接收。这样,所述眼球追踪系统的光路不经过VR光学透镜,以简化所述头戴式可视设备的整体光路系统设计,利于实施。(The head-mounted visual equipment comprises a screen, a VR (virtual reality) optical lens and a visual tracking system, wherein the screen is used for projecting a virtual scene image to the eyeball of a user; and an eyeball tracking system for detecting the sight line direction of the eyeballs of the user. The eye tracking system comprises: at least one light source for projecting a detection light to the eyeball of the user; and the receiving module is used for receiving the detection light reflected from the eyeball of the user, wherein the receiving module is positioned on the side part of the VR optical lens and faces the eyeball of the user, so that the detection light reflected from the eyeball of the user is directly received by the receiving module. Therefore, the light path of the eyeball tracking system does not pass through the VR optical lens, so that the design of the whole light path system of the head-wearing visual equipment is simplified, and the implementation is facilitated.)
1. A head-mounted visualization device, comprising:
a screen for projecting a virtual scene image to the eyes of a user,
a VR (virtual reality) optical lens for establishing an optical path between the screen and the eyeball of the user so that the virtual scene image projected by the screen can reach the eyeball of the user through the VR optical lens; and
an eye tracking system for detecting a visual direction of an eye of the user to adjust a display position of the virtual scene image on the screen based on the visual direction, wherein the eye tracking system comprises:
at least one light source for projecting a detection light to the eyeball of the user; and
the receiving module is used for receiving the detection light reflected from the eyeball of the user so as to detect the sight line direction of the eyeball of the user, wherein the receiving module is positioned on the side part of the VR optical lens and faces the eyeball of the user, so that the detection light reflected from the eyeball of the user is directly received by the receiving module.
2. The head-mounted visual equipment according to claim 1, wherein the optical lens comprises at least one optical lens and a light-sensing chip, wherein the optical lens is used for receiving the detecting light reflected by the eyeball of the user, and an included angle is formed between a plane defined by the light-sensing chip and a plane defined by the at least one optical lens.
3. The head-mounted visualization apparatus according to claim 2, wherein a size of an angle between a plane defined by the photo sensor chip and a plane defined by the at least one optical lens is determined by an angle between an object optical axis defined by the user's eyeball and a photo-sensing optical axis defined by the receiving module and an optical parameter of the at least one optical lens.
4. The head-mounted vision apparatus of claim 3, wherein an angle between an object optical axis defined by the user's eyeball and a photosensitive optical axis defined by the receiving module is determined by a distance between the user's eyeball and the VR optical lens, a predetermined diameter of the user's eyeball, and a distance between the VR optical lens and the receiving module.
5. The head-mounted visual equipment according to claim 4, wherein the included angle between the object optical axis set by the user's eyeball and the photosensitive optical axis set by the receiving module is in the range of: 25.0 to 40.0 degrees.
6. The head-mounted visualization apparatus as recited in claim 5, wherein an angle between the optical axis defined by the user's eyeball and the optical axis defined by the receiving module is set to be 32 °.
7. The head-mounted visual device of claim 6, wherein an angle between a plane defined by the photosensitive chip and a plane defined by the at least one optical lens is set to be 20 °.
8. The head-mounted visual apparatus of any one of claims 1-7, wherein said at least one optical lens of said receiving module is implemented as a monolithic aspheric optical lens.
9. The head-mounted visualization device of claim 8, wherein the eye tracking system is integrated with the VR optical lens such that the VR optical lens and the eye tracking system have a unitary structure.
10. The head-mounted visualization device of claim 8, wherein the at least one light source comprises 8 light sources, wherein the 8 light sources are circumferentially arranged around the VR optical lens for projecting the detection light to the user's eyeball.
11. The head-mounted visualization device according to claim 10, wherein each of the light sources comprises a plurality of optical fibers and a non-visible light source, the plurality of optical fibers are respectively connected to the non-visible light source, so that the detection light is generated at each optical fiber of the plurality of optical fibers after the non-visible light source is conducted.
12. The head-mounted visual apparatus of any one of claims 1-7, wherein the screen is movable relative to the VR optical lens to adjust the diopter of the user's eyeball by changing the distance between the screen and the VR optical lens.
13. An eye tracking system for a head-mounted visual device, comprising:
at least one light source for projecting a detection light to the eyeball of the user; and
the receiving module is used for receiving the detection light reflected from the eyeball of the user so as to detect the sight line direction of the eyeball of the user, wherein the receiving module is positioned on the side part of the VR optical lens of the head-mounted visual equipment and faces the eyeball of the user, so that the detection light reflected from the eyeball of the user is directly received by the receiving module.
14. The eye tracking system according to claim 13, wherein the receiving module comprises an optical lens and a light sensor, wherein the optical lens comprises at least one optical lens for receiving the detecting light reflected by the user's eyes, and an included angle is formed between a plane defined by the light sensor and the plane defined by the at least one optical lens.
15. The eye tracking system according to claim 14, wherein the size of the angle between the plane defined by the photo sensor chip and the plane defined by the at least one optical lens is determined by the angle between the object optical axis defined by the user's eye and the photo sensor optical axis defined by the receiving module and the optical parameters of the at least one optical lens.
16. The eye tracking system of claim 15, wherein an angle between the object axis defined by the user's eye and the photosensitive axis defined by the receiving module is determined by a distance between the user's eye and the VR optical lens, a predetermined diameter of the user's eye, and a distance between the VR optical lens and the receiving module.
17. The eye tracking system according to claim 16, wherein an angle between the optical axis defined by the user's eyes and the optical axis defined by the receiving module is set to 32 °, and an angle between the plane defined by the photo sensor chip and the plane defined by the at least one optical lens is set to 20 °.
18. The eye tracking system according to any one of claims 13-17, wherein said at least one optical lens of said receiving module is implemented as a single-piece aspheric optical lens.
19. The eye tracking system according to claim 18, wherein the at least one light source comprises 8 light sources, wherein 8 light sources are circumferentially disposed around the VR optical lens of the head mounted vision device for projecting the detection light to the user's eye, wherein each light source comprises a plurality of optical fibers and a non-visible light source, and the plurality of optical fibers are respectively connected to the non-visible light source, so that the detection light is generated at each optical fiber of the plurality of optical fibers after the non-visible light source is turned on.
20. An eye tracking method for a head-mounted visual device, comprising:
projecting a detection light to an eyeball of a user; and
the detection light reflected from the user's eyeball is received by a receiving module to detect the sight direction of the user's eyeball, wherein the receiving module is located at the side of the VR optical lens of the head-mounted visual equipment and faces the user's eyeball, so that the detection light reflected from the user's eyeball is directly received by the receiving module.
21. A diopter adjustment method for a head-mounted visual device, comprising:
the screen is moved to adjust the distance between the screen and the VR optical lens to change the diopter of the user's eyeball.
22. The diopter adjustment method of claim 21, wherein an eyeball tracking system is integrated with the VR optical lens such that the VR optical lens and the eyeball tracking system have a unitary structure.
Technical Field
The present invention relates to the field of virtual reality, and in particular, to a head-mounted visual device for implementing virtual reality and an eyeball tracking system for the same.
Background
In recent years, virtual Reality (virtual Reality) and Augmented Reality (Augmented Reality) have created a unique sensory experience for humans. Virtual reality is an interactive experience with computer-generated virtual scenes in a simulated environment. Immersive simulated environments can resemble or depart from the real world, creating sensory experiences that are not available in the ordinary physical real world. Currently, numerous VR technology-related products are emerging on the market, through which users can immerse and interact with three-dimensional stereo space vision.
The most common VR product is a Head-Mounted visual device (Head-Mounted Display) that is shaped like eyeglasses. When in use, a user wears the device on the head for virtual reality experience. Mainstream support technologies for head-mounted visual devices include: SLAM algorithms and eye tracking techniques. The SLAM algorithm (Simultaneous Localization and mapping) mainly plays a role in constructing the immersive virtual environment, and the technical core of the SLAM algorithm lies in synchronous positioning and mapping. For the entire virtual environment constructed by the SLAM algorithm, it should be ensured that the virtual environment can be observed by human eyes at the display position of the head-mounted display device. This is the core goal of eye tracking technology: the display position of the virtual environment is adjusted by detecting the sight line direction of the human eyes, thereby ensuring that the human eyes can observe the virtual environment image.
However, there are still a number of technical challenges in the implementation of head-mounted visual devices, especially the design of the optical system of the head-mounted visual device. These technical difficulties seriously affect the user experience and restrict the wider application of the head-mounted visual device in the actual industry.
Disclosure of Invention
The main objective of the present invention is to provide a head-mounted visual device and an eye tracking system for the same, wherein the optical path of the eye tracking system does not pass through a VR optical lens, so as to simplify the design of the whole optical path system of the head-mounted visual device, which is beneficial to implementation.
Another objective of the present invention is to provide a head-mounted vision device and an eye tracking system for the same, wherein the optical path of the eye tracking system does not pass through the VR optical lens, so that the VR optical lens only needs to optically process the image projected by the screen without considering the influence on the optical path of the eye tracking system. In other words, the optical parameters of the VR optical lens are relatively uniform, which facilitates the optical design and processing of the VR lens.
Another objective of the present invention is to provide a head-mounted vision apparatus and an eye tracking system for the same, wherein the optical path of the eye tracking system does not pass through the VR optical lens. In other words, the VR optical lens and the eye tracking system are independent from each other, so as to facilitate stability of the overall performance of the head-mounted visual device.
Another objective of the present invention is to provide a head-mounted visual device and an eye tracking system for the same, wherein the detection light for implementing eye tracking is directly sensed by the receiving module for implementing eye tracking after being diffusely reflected at the human eye, so that compared with the existing eye tracking system for the head-mounted visual device, a reflector for reflecting the detection light is omitted, thereby simplifying the optical system of the eye tracking system and saving the cost.
Another objective of the present invention is to provide a head-mounted visual device and an eyeball tracking system for the same, wherein an included angle is formed between a plane of a photosensitive chip of the receiving module and a plane of an optical lens of the receiving module. In other words, the plane where the photosensitive chip is located and the plane where the optical lens is located are obliquely arranged, so that the optical design requirement of the receiving module is simplified in an 'imaging plane inclination' mode, and the imaging quality is improved.
Another objective of the present invention is to provide a head-mounted visual device and an eye tracking system for the same, wherein the "relative illuminance" can be compensated by the "inclination of the imaging plane".
Another object of the present invention is to provide a head-mounted vision device and an eye tracking system for the same, wherein the light source for projecting the detection light has a relatively small size in the eye tracking system, so as to prevent the size of the light source from adversely affecting the observation of the human eye. In other words, the range of the blind zone of the human eye is reduced by the light source with smaller size.
Another objective of the present invention is to provide a head-mounted vision device and an eye tracking system for the head-mounted vision device, wherein in an embodiment of the present invention, the eye tracking system is integrated with the VR optical lens, so as to ensure the optical stability of the eye tracking system and the VR optical lens through the stable relationship between the eye tracking system and the VR optical lens.
Another object of the present invention is to provide a head-mounted vision device and an eye tracking system for the same, wherein in an embodiment of the present invention, the eye tracking system is integrated with the VR optical lens, so as to eliminate errors caused during the assembly process, reduce the weight and facilitate the later maintenance.
Another object of the present invention is to provide a head-mounted visual device and an eye tracking system for the same, wherein, in an embodiment of the present invention, the screen of the head-mounted visual device is movable relative to the VR optical lens to adjust the diopter of the human eye by adjusting the distance between the screen and the VR optical lens, so as to ensure the user experience.
Other advantages and features of the invention will become apparent from the following description and may be realized by means of the instrumentalities and combinations particularly pointed out in the appended claims.
To achieve at least one of the above objects or advantages, the present invention provides a head-mounted visual device, including:
a screen for projecting a virtual scene image to the eyes of a user,
a VR (virtual reality) optical lens for establishing an optical path between the screen and the eyeball of the user so that the virtual scene image projected by the screen can reach the eyeball of the user through the VR optical lens; and
an eye tracking system for detecting a visual direction of an eye of the user to adjust a display position of the virtual scene image on the screen based on the visual direction, wherein the eye tracking system comprises:
at least one light source for projecting a detection light to the eyeball of the user; and
the receiving module is used for receiving the detection light reflected from the eyeball of the user so as to detect the sight line direction of the eyeball of the user, wherein the receiving module is positioned on the side part of the VR optical lens and faces the eyeball of the user, so that the detection light reflected from the eyeball of the user is directly received by the receiving module.
In an embodiment of the present invention, the optical lens includes at least one optical lens and a light sensing chip, wherein the optical lens is configured to receive the detection light reflected by the eyeball of the user, and an included angle is formed between a plane set by the light sensing chip and a plane set by the at least one optical lens.
In an embodiment of the invention, a size of an included angle between the plane set by the photo sensor chip and the plane set by the at least one optical lens depends on an included angle between an object optical axis set by an eyeball of the user and the photo sensor optical axis set by the receiving module and an optical parameter of the at least one optical lens.
In an embodiment of the invention, an included angle between the object optical axis set by the user's eyeball and the photosensitive optical axis set by the receiving module is determined by a distance between the user's eyeball and the VR optical lens, a preset diameter of the user's eyeball, and a distance between the VR optical lens and the receiving module.
In an embodiment of the present invention, the range of the included angle between the object optical axis set by the user's eyeball and the photosensitive optical axis set by the receiving module is: 25.0 to 40.0 degrees.
In an embodiment of the present invention, an included angle between the optical axis set by the user's eyeball and the optical axis set by the receiving module is set to be 32 °.
In an embodiment of the invention, an included angle between a plane defined by the photo sensor chip and a plane defined by the at least one optical lens is set to be 20 °.
In an embodiment of the invention, the at least one optical lens of the receiving module is implemented as a single-piece aspheric optical lens.
In an embodiment of the invention, the eye tracking system is integrated with the VR optical lens, so that the VR optical lens and the eye tracking system have an integrated structure.
In an embodiment of the invention, the at least one light source includes 8 light sources, wherein the 8 light sources are circumferentially disposed on a periphery of the VR optical lens for projecting the detection light to an eyeball of the user.
In an embodiment of the invention, each of the light sources includes a plurality of optical fibers and a non-visible light source, and the plurality of optical fibers are respectively connected to the non-visible light source, so that the detection light is generated at each optical fiber of the plurality of optical fibers after the non-visible light source is conducted.
In an embodiment of the invention, the screen is movable relative to the VR optical lens to adjust the diopter of the user's eyeball by changing the distance between the screen and the VR optical lens.
According to another aspect of the present invention, there is also provided an eye tracking system for a head-mounted visual device, comprising:
at least one light source for projecting a detection light to the eyeball of the user; and
the receiving module is used for receiving the detection light reflected from the eyeball of the user so as to detect the sight line direction of the eyeball of the user, wherein the receiving module is positioned on the side part of the VR optical lens of the head-mounted visual equipment and faces the eyeball of the user, so that the detection light reflected from the eyeball of the user is directly received by the receiving module.
In an embodiment of the invention, the receiving module includes an optical lens and a light sensing chip, wherein the optical lens includes at least one optical lens for receiving the detecting light reflected by the eyeball of the user, and an included angle is formed between a plane set by the light sensing chip and the plane set by the at least one optical lens.
In an embodiment of the invention, a size of an included angle between the plane set by the photosensitive chip and the plane set by the at least one optical lens depends on an included angle between an object optical axis set by the eyeball of the user and the photosensitive optical axis set by the receiving module and an optical parameter of the at least one optical lens.
In an embodiment of the invention, an included angle between the object optical axis set by the user's eyeball and the photosensitive optical axis set by the receiving module is determined by a distance between the user's eyeball and the VR optical lens, a preset diameter of the user's eyeball, and a distance between the VR optical lens and the receiving module.
In an embodiment of the invention, an included angle between the optical axis set by the eyeball of the user and the optical axis set by the receiving module is set to be 32 °, and an included angle between the plane set by the photosensitive chip and the plane set by the at least one optical lens is set to be 20 °.
In an embodiment of the invention, the at least one optical lens of the receiving module is implemented as a single-piece aspheric optical lens.
In an embodiment of the invention, the at least one light source includes 8 light sources, wherein the 8 light sources are circumferentially disposed around a periphery of a VR optical lens of the head-mounted visual device and are used for projecting the detection light to an eyeball of the user, and each light source includes a plurality of optical fibers and a non-visible light source, and the plurality of optical fibers are respectively communicated with the non-visible light source, so that the detection light is respectively generated at each optical fiber of the plurality of optical fibers after the non-visible light source is conducted.
According to another aspect of the present invention, the present invention also provides an eye tracking method for a head-mounted visual device, comprising:
projecting a detection light to an eyeball of a user; and
the detection light reflected from the user's eyeball is received by a receiving module to detect the sight direction of the user's eyeball, wherein the receiving module is located at the side of the VR optical lens of the head-mounted visual equipment and faces the user's eyeball, so that the detection light reflected from the user's eyeball is directly received by the receiving module.
According to another aspect of the present invention, the present invention also provides a diopter adjustment method for a head-mounted visual device, including:
the screen is moved to adjust the distance between the screen and the VR optical lens to change the diopter of the user's eyeball.
In an embodiment of the invention, the eye tracking system is integrated with the VR optical lens, so that the VR optical lens and the eye tracking system have an integrated structure.
Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.
These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description, the accompanying drawings and the claims.
Drawings
Fig. 1 is a schematic view of an optical path system of a conventional head-mounted visual device.
Fig. 2 is a schematic diagram of a conventional head-mounted visual apparatus in which an LED light source in an eye tracking light path projects detection light to an eye of a user.
Fig. 3 is a schematic diagram of a process of adjusting eye diopter of a conventional head-mounted visual device.
Fig. 4 is a schematic diagram illustrating an optical system of the head-mounted visual device according to a preferred embodiment of the invention.
Fig. 5 is a schematic diagram illustrating a relative position relationship between an ideal imaging surface of the receiving module and a plane where the photosensitive chip is located when the photosensitive chip of the receiving module and the photosensitive optical axis Y are arranged in a perpendicular relationship.
Fig. 6 and 7 are schematic diagrams illustrating a specific optical system design of the eye tracking system according to the preferred embodiment of the invention.
Fig. 8 and 9 are schematic diagrams illustrating the at least one light source of the eye tracking system according to the preferred embodiment of the invention.
FIG. 10 is a schematic view illustrating a process of adjusting diopter of an eyeball of the head-mounted visual equipment according to the preferred embodiment of the invention
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
Summary of the application
As described above, the main support technologies of the head-mounted visual device are: slam (simultaneouslocalization and mapping) algorithm and eye tracking technique. However, there are technical difficulties in the specific implementation of the head-mounted visual device, especially the design of the optical system of the head-mounted visual device.
Fig. 1 is a schematic view of an optical path system of a conventional head-mounted visual device. As shown in fig. 1, the optical path system of the head-mounted visual device is mainly composed of a virtual scene imaging optical path and an eyeball tracking optical path. The path of the imaging light path of the virtual scene is as follows: the
First, both the virtual scene imaging optical path and the eye tracking optical path pass through the VR
Next, the
Furthermore, the eye tracking optical path of the existing head-mounted visual device is: the
In addition, for the head-mounted visual device, the adjustment is needed according to the degree of myopia or hyperopia of human eyes, so as to meet the user experience and demand. As shown in fig. 3, the technical solution for the existing head-mounted visual device to meet the requirement is as follows: the relative positions of the fixed
In view of the above technical problems, the basic concept of the present invention is to change the light path design of the eye tracking system, so that the detection light for detecting the direction of the eye line of the human eye is directly received by the receiving module without passing through the VR optical lens, and thus the light path of the eye tracking system and the imaging light path of the virtual scene are relatively kept independent, thereby reducing the design difficulty of the eye tracking system, simplifying the structure thereof, and facilitating the improvement of the overall performance stability of the head-mounted visual device.
Based on this, the invention proposes a head-mounted visual device comprising: a screen for projecting a virtual scene image to the user's eyeball, a VR (virtual reality) optical lens for constructing an optical path between the screen and the user's eyeball, so that the virtual scene image projected by the screen can reach the user's eyeball through the VR optical lens; and an eyeball tracking system for detecting the sight direction of the eyeballs of the user so as to adjust the display position of the virtual scene image on the screen based on the sight direction, wherein the eyeball tracking system comprises: at least one light source for projecting a detection light to the eyeball of the user; and a receiving module, for receiving the detecting light reflected from the user's eyeball to detect the sight direction of the user's eyeball, wherein the receiving module is located at the side of the VR optical lens and faces the user's eyeball, so that the detecting light reflected from the user's eyeball is directly received by the receiving module.
Having described the general principles of the present invention, various non-limiting embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Exemplary head-mounted visual device
Referring to fig. 4 to 10, a head-mounted visual device according to a preferred embodiment of the invention is illustrated, wherein a user can wear the head-mounted visual device on the head for a virtual reality experience.
Fig. 4 is a schematic diagram illustrating an optical system of the head-mounted visual device according to the preferred embodiment of the invention. As shown in fig. 4, the optical system of the head-mounted visual device is mainly composed of two parts: a virtual
As shown in fig. 4, the virtual
The
In an implementation, the virtual scene image of the
When the
As mentioned above, after the
Further, in a specific implementation, the
For the head-mounted visual device, its performance depends mainly on: the virtual
Accordingly, as shown in fig. 4, in the preferred embodiment of the present application, the optical path design of the
More specifically, in the preferred embodiment of the present invention, the receiving
Further, by means of the special arrangement of the receiving
More importantly, the virtual
Further, as shown in FIG. 4, in the preferred embodiment of the present invention, the receiving
It should be known to those skilled in the art that, as shown in fig. 5, when there is an included angle between the object optical axis X and the photosensitive optical axis Y, if the
In order to improve the imaging quality of the receiving
Preferably, in the preferred embodiment of the present invention, a second scheme is adopted, in which the relative positional relationship of the plane set by the photo-
It will be appreciated that, in the case of the "imaging plane tilt" scheme, the difficulty of designing the receive
In a specific optical design, the included angle β between the plane defined by the
Here, when the scheme of "image plane tilting" is adopted, the optical design of the
In addition, in the preferred embodiment of the present invention, the included angle α between the object axis X and the photosensitive axis Y depends on the distance between the user's
Therefore, on the premise that the included angle α between the object optical axis X and the photosensitive optical axis Y is set to be 32 °, and it is determined that the
Here, it should be easily understood by those skilled in the art that, in the preferred embodiment of the present invention, the included angle β between the plane set by the
To further optimize the performance of the
It is worth mentioning that compared with the conventional led (light Emitting diode) light source, the light source beam formed by the multi-path
As mentioned above, the head-mounted visual device needs to be adjusted according to the degree of myopia or hyperopia of human eyes to meet the user experience and demand. In particular, in the preferred embodiment of the present invention, as shown in fig. 10, the
Accordingly, according to yet another aspect of the present invention, the present invention also provides a diopter adjustment method for a head-mounted visual device, which includes: the
Further, the
In summary, by changing the optical path design of the
Exemplary eye tracking System
As shown in fig. 4 to 10, according to another aspect of the present invention, the present invention further provides an
As shown in fig. 4, in the preferred embodiment of the present application, the optical path design of the
More specifically, in the preferred embodiment of the present invention, the receiving
Further, by means of the special arrangement of the receiving
More importantly, the virtual
Further, as shown in FIG. 4, in the preferred embodiment of the present invention, the receiving
It should be known to those skilled in the art that, as shown in fig. 5, when there is an included angle between the object optical axis X and the photosensitive optical axis Y, if the
In order to improve the imaging quality of the receiving
Preferably, in the preferred embodiment of the present invention, a second scheme is adopted, in which the relative positional relationship of the plane set by the photo-
It will be appreciated that, in the case of the "imaging plane tilt" scheme, the difficulty of designing the receive
In a specific optical design, the included angle β between the plane defined by the
Here, when the scheme of "image plane tilting" is adopted, the optical design of the
In addition, in the preferred embodiment of the present invention, the included angle α between the object axis X and the photosensitive axis Y depends on the distance between the user's
Therefore, on the premise that the included angle α between the object optical axis X and the photosensitive optical axis Y is set to be 32 °, and it is determined that the
Here, it should be easily understood by those skilled in the art that, in the preferred embodiment of the present invention, the included angle β between the plane set by the
To further optimize the performance of the
It is worth mentioning that compared with the conventional led (light Emitting diode) light source, the light source beam formed by the multi-path
According to still another aspect of the present invention, there is also provided an eye tracking method for a head-mounted visual device, comprising:
projecting a detecting light 200 to the eyeball of the user; and
the detecting light 200 reflected from the user's
Here, although the above description has been made by taking an example in which the
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.
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