Optical path system for myopia prevention and control

Abstract

The embodiment of the application provides a light path system for myopia prevention and control, comprising: a laser source, a light homogenizing plate and an illumination projection system, wherein the light homogenizing plate and the illumination projection system are arranged in a light transmission channel of the light path system, and the laser source is arranged at an entrance end of the light transmission channel; the light homogenizing plate is arranged at a light output end of the laser source to scatter light emitted by the laser source; the illumination projection system is arranged on a side of the light homogenizing plate away from the laser source and is arranged in a spaced manner with the light homogenizing plate to collect scattered light emitted by the light homogenizing plate and project the scattered light to a pupil of a user. The embodiment of the application can realize uniform surface illumination distribution of an eye fundus, so that the eye sees a visual effect of a large-diameter uniform surface light spot in a light feeding process, so as to reduce visual stimulation to the human eye and increase red light irradiation intensity of a peripheral macular area, realize uniform light feeding treatment and improve the effect of inhibiting eye axis growth.

Description

Technical Field

[0001] This application relates to the field of vision control device technology, and in particular to an optical path system for myopia control. Background Technology

[0002] Axial length elongation is one of the main factors causing myopia, especially in adolescents during their rapid growth period. Therefore, irradiating the retina with red light has a positive impact on myopia prevention and control in adolescents. Studies have shown that direct irradiation of the retina with 650nm long-wavelength red light can effectively inhibit the growth of axial length. The working principle is as follows: This wavelength has strong penetrating power, so after penetrating the retina, the red light simultaneously acts on the choroid. Due to the warming effect of 650nm red light, it opens the bottleneck-like narrowing at the opening of the arterioles in the choroidal lobules, increasing blood flow into the lobules. This increases microcirculatory blood volume, thickens the choroid, and prevents scleral hypoxia, thus restoring the thinned choroid to its normal thickness. This provides sufficient oxygen to the sclera, improves blood circulation in the fundus, and prevents further progression of myopia. Secondly, 650nm red light can induce dopamine secretion from retinal epithelial pigment cells, effectively inhibiting excessive axial length elongation.

[0003] Currently, phototherapy devices typically employ a binocular structure, with each binocular corresponding to one eye. The distance between the binoculars can be adjusted via a mechanical structure to fit the human eye, ensuring that the red light images seen by both eyes overlap. The basic optical path of a single binocular is as follows: red wavelength light is emitted from the light source, passes through a light-transmitting element, enters the human eye, and illuminates the retina.

[0004] The red light source used in the aforementioned phototherapy equipment, whether LED or laser diode, is a near-fixed light source with a small luminous area. When the human eye looks directly at the light source or observes the image of the light source after it has been transformed by a lens, the eye adjusts its fovea to face the light source itself and sees a bright circular spot in the center. When the eye adjusts to a clearer position to make the image of the light source clearer, the size of the bright spot in the center decreases, and the brightness of the bright spot increases further, increasing visual stimulation and causing eye discomfort. Furthermore, besides the strong visual stimulation caused by looking directly at the small light source, this approach also has a negative impact. When the red light energy is concentrated more in the center of the macula, while the red light energy in the peripheral macula is very weak, the illumination stimulation of the choroid in the macula is uneven, leading to uneven heating and stimulation of the choroid, ultimately affecting the actual effect of red light irradiation in inhibiting axial elongation. Summary of the Invention

[0005] This application provides an optical path system for myopia prevention and control, which solves the problem that the concentrated red light energy in existing phototherapy devices leads to visual stimulation discomfort and uneven phototherapy, affecting the actual effect of red light irradiation in inhibiting axial elongation.

[0006] To address the aforementioned technical problems, this application provides an optical path system for myopia prevention and control, comprising: a laser source, a light-diffusing plate, and an illumination projection system, wherein...

[0007] The light-diffusing plate and the illumination projection system are disposed within the light transmission channel of the optical path system, and the laser source is disposed at the entrance end of the light transmission channel;

[0008] The light-diffusing plate is attached to the light output end of the laser source to scatter the light emitted by the laser source;

[0009] The lighting projection system is positioned on the side of the light-diffusing plate away from the laser source and is spaced apart from the light-diffusing plate to collect the scattered light emitted by the light-diffusing plate and project the scattered light onto the user's pupil.

[0010] Optionally, the illumination projection system includes: an illumination lens and a projection lens.

[0011] The illumination lens is disposed on the side of the light-diffusing plate away from the laser source and is spaced apart from the light-diffusing plate to collect the scattered light and project the scattered light onto the projection lens;

[0012] The projection lens and the illumination lens are spaced apart to project the scattered light onto the user's pupil.

[0013] Optionally, an exit pupil surface is provided on the side of the illumination lens away from the light-diffusing plate to ensure that the energy of the light spot projected onto the exit pupil surface is evenly distributed.

[0014] Optionally, the light-diffusing plate is located on the front focal plane of the illumination lens so that the scattered light rays are uniformly irradiated on the exit pupil surface.

[0015] Optionally,

[0016] The exit pupil surface is located at the front focal plane of the projection lens so that the scattered light is uniformly projected onto the user's pupil.

[0017] Optionally,

[0018] The user's pupil is located at the back focal plane of the projection lens, so that light emitted from various positions on the exit pupil plane can pass through the pupil and illuminate the user's fundus.

[0019] Optionally, the system further includes: a structured light forming structure.

[0020] The structured light forming structure is disposed within the light transmission channel, located between the illumination lens and the projection lens, and the structured light forming structure coincides with the exit pupil surface to collect the scattered light projected by the illumination lens and to block the light projected to the fovea of ​​the user's fundus in a set blocking manner to form a set pattern.

[0021] The projection lens projects the pattern formed by the structured light forming structure onto the user's pupil, and forms a red light illumination area with a set pattern on the user's retina through the human eye.

[0022] Optionally, the structured light forming structure blocks the uniform energy distribution on the exit pupil surface in a transmission blocking or reflection blocking manner to form the set pattern.

[0023] Optionally, the structured light forming structure is a transparent plate, on which a pattern of the light-shielding portion of the structured light required for the application is provided, so that after the uniform light spot on the exit pupil surface passes through the transparent plate, the light spot acquires the pattern information of the structured light.

[0024] The central area of ​​the transparent plate is an opaque area, and the scattered light emitted from the exit pupil surface is projected onto the user's pupil through the projection lens in a transmission-blocking manner.

[0025] Optionally, the structured light forming structure is a reflector, and the central region of the reflector is a hollow structure.

[0026] The light transmission channel is a folded channel. The scattered light emitted from the illumination lens is projected onto the reflector, which then reflects the scattered light to the projection lens, and finally projects the scattered light into the user's pupil.

[0027] Optionally, the system further includes: a fixed-view light source,

[0028] The fixed-view light source is located on the side of the reflector away from the projection lens, and the light emitted by the fixed-view light source is projected onto the projection lens through the hollow structure of the reflector.

[0029] Optionally, the light-diffusing plate is made of a material with light-scattering properties.

[0030] The optical path system for myopia prevention and control provided in this application embodiment sets up a light homogenizing plate and an illumination projection system in the light transmission channel. The light homogenizing plate is attached to the light output end of the laser source so that after the laser beam hits the light homogenizing plate, the collimation of the laser is removed, and the red light is scattered and propagated backward. The scattered light is then projected onto the user's pupil through the illumination projection system, which can achieve a uniform surface illumination distribution on the fundus. This allows the eye to see a large-diameter uniform surface light spot during phototherapy, thereby reducing visual stimulation to the human eye and increasing the red light irradiation intensity in the peripheral macula, achieving uniform phototherapy and improving the effect of inhibiting axial elongation.

[0031] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This application provides a schematic diagram of the structure of an optical path system for myopia control.

[0034] Figure 2 This is a schematic diagram of another optical path system for myopia control provided in an embodiment of this application;

[0035] Figure 3 This is a schematic diagram of another optical path system for myopia prevention and control provided in the embodiments of this application. Detailed Implementation

[0036] 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.

[0037] Reference Figure 1 The diagram illustrates a structural schematic of an optical path system for myopia control provided in an embodiment of this application. Figure 1As shown, the optical path system for myopia prevention and control may include: a laser source 11, a light-diffusing plate 12, and an illumination projection system (13 and 14), wherein,

[0038] The light-diffusing plate 12 and the illumination projection system (composed of 13 and 14) can be placed in the light transmission channel of the optical path system.

[0039] The laser source 11 can be located at the entrance end of the light transmission channel. In this example, the laser source 11 can emit 650nm red light. Due to the heating effect of 650nm red light, it will open the bottleneck-like narrowing at the opening of the small arteries of the choroidal lobules, increasing the blood flow into the lobules, thereby increasing the microcirculatory blood volume, thickening the choroid, and preventing scleral hypoxia. Therefore, it can restore the thinned choroid to its normal thickness, provide sufficient oxygen to the sclera, improve blood circulation in the fundus, and thus prevent further progression of myopia. Of course, it is not limited to this. In specific implementations, the laser source 11 can also emit red light of other wavelengths. Specifically, the wavelength value of the red light emitted by the laser source 11 can be determined according to business needs, and this embodiment does not impose any restrictions on this.

[0040] A light-diffusing plate 12 is attached to the light output end of the laser source 11 to scatter the light emitted by the laser source 11. In this example, the light-diffusing plate 12 can be made of a material with light-scattering properties, such as frosted glass.

[0041] In a practical implementation, the homogenizing plate 12 can be placed close to the laser source 11. The homogenizing plate 12 can be frosted glass or other materials that scatter light. This arrangement aims to remove the collimation of the laser beam after it strikes the homogenizing plate 12, causing the red light to scatter and propagate backward. At this point, the light source, after passing through the homogenizing plate 12, can be equivalent to a diverging surface light source. The size of the surface light source is the size of the light spot struck by the laser source 11 on the homogenizing plate 12, and its divergence angle is equal to the scattering angle of the light by the homogenizing plate 12.

[0042] The illumination projection system (13 and 14) can be set on the side of the light homogenizing plate 12 away from the laser source 11 and spaced apart from the light homogenizing plate 12 to collect the scattered light emitted by the light homogenizing plate 12 and project the scattered light onto the user's pupil 17.

[0043] This application embodiment adds a homogenizing plate and an illumination projection system to the optical path system used for myopia prevention and control. This allows the laser beam to hit the homogenizing plate, eliminating the collimation of the laser and causing red light to scatter and propagate backward. The illumination projection system then projects the scattered light onto the user's pupil, achieving a uniform surface illumination distribution on the fundus. This allows the eye to see a large-diameter, uniform surface light spot during phototherapy, reducing visual stimulation to the human eye and increasing the intensity of red light irradiation in the peripheral macula, thus achieving uniform phototherapy and improving the effect of inhibiting axial elongation.

[0044] Next, the structure of the optical path system provided in the embodiments of this application will be described in detail with reference to specific implementation methods.

[0045] In one specific implementation of this application, the illumination projection system may include: an illumination lens 13 and a projection lens 14 (e.g., Figure 1 (As shown).

[0046] In this example, a lens refers to an optical element made of a transparent material whose surface is part of a sphere. "Illumination" and "projection" are functional descriptions, and their concrete implementation can be a single lens or a lens group consisting of multiple lenses. Illumination lenses and projection lenses can form the system structure of Kohler lighting.

[0047] The illumination lens 13 can be disposed on the side of the light homogenizing plate 12 away from the laser source 11 and spaced apart from the light homogenizing plate 12, so as to collect the scattered light emitted through the light homogenizing plate 12 and project the scattered light onto the projection lens 14.

[0048] The projection lens 14 can be spaced apart from the illumination lens 13 to project the scattered light emitted by the illumination lens 13 onto the user's pupil 17.

[0049] In this embodiment, the illumination lens 13 and the projection lens 14 can be made of the same material or different materials. When the illumination lens 13 and the projection lens 14 are made of the same material, the transparency and other parameters of the materials used in the illumination lens 13 and the projection lens 14 can be the same or different. Specifically, the materials and material parameters used to manufacture the illumination lens 13 and the projection lens 14 can be determined according to business requirements, and this embodiment does not impose any restrictions on this.

[0050] In one specific implementation of this application, an exit pupil surface 15 is attached to the side of the illumination lens 13 away from the light-diffusing plate 12 so that the energy of the light spot projected onto the exit pupil surface 15 is evenly distributed.

[0051] In an optical system, the image formed by the aperture stop in the image space of the optical system is called the system's "exit pupil". The position (represented by the exit pupil distance) and diameter (represented by the exit pupil diameter) of the exit pupil represent the position and aperture of the emitted beam. In this example, the mechanical aperture stop immediately behind the illumination lens 13 is the exit pupil surface 15.

[0052] In another specific implementation of this application, the light-diffusing plate 12 can be located on the front focal plane of the illumination lens 13 so that the scattered light is uniformly illuminating the exit pupil surface 15. That is, the illumination lens 13 can make the scattered light emitted by the light-diffusing plate 12 uniformly illuminating its exit pupil surface 15 after passing through the illumination lens 13.

[0053] In another specific implementation of this application, the exit pupil surface 15 can be located at the front focal plane of the projection lens 14 so that the scattered light is uniformly projected onto the user's fundus 16. That is, by placing the exit pupil surface 15 of the illumination lens 13 at the front focal plane of the projection lens 14, the projection lens 14 and the human eye can form a projection lens group, projecting the light spot distribution on the exit pupil surface 15 onto the user's fundus 16, so that the human eye sees a uniform surface light source.

[0054] In another specific implementation of this application, the user's pupil 17 is located at the back focal plane of the projection lens 14, so that light emitted from various positions on the pupillary surface 15 shines through the user's pupil 17 onto the user's fundus 16.

[0055] In this embodiment, the exit pupil surface 15 of the illumination lens 13 is optically conjugate to the fundus of the human eye. Therefore, the distribution of the surface light source actually seen by the human eye is the image of the light spot distribution on the exit pupil surface, magnified to a certain scale according to the focal length of the projection lens 14. Since the exit pupil surface 15 is optically conjugate to the user's fundus 16, the circular light spot actually observed by the human eye will have a missing central portion, thereby avoiding visual stimulation of the fovea.

[0056] The relationship between the light spot and the image in the above system is as follows: Assuming the focal length of the illumination lens is f1 and the diameter is D1, the limiting scattering half-angle θ1 that the illumination lens can receive from the homogenizer is: tanθ1=D1 / (2*f1). The limiting diameter of the exit pupil surface of the illumination lens is the same as the diameter of the illumination lens. The divergence half-angle θ1' of the exit pupil surface is related to the size d of the laser tube on the homogenizer: tanθ1'=d / (2*f1). Assuming the focal length of the projection lens is f2 and the diameter is D2, the diameter D of the light spot at the pupil is... 瞳孔 For: D 瞳孔 =2*f2*tanθ1` = f2 / f1, which is the focal length ratio of the projection lens and the illumination lens. The half-angle θ of the light spot divergence at the pupil of the human eye is... 瞳孔 For: tanθ 瞳孔= D1 / (2*f2). Assuming the focal length of the human eye is f3, then the actual size of the surface light source seen through the fundus of the human eye is D. 眼底 For: D 眼底 =2*f3*tanθ 瞳孔 =f3 / f2, which is the ratio of the focal length of the human eye to the focal length of the projection lens. Normally, the focal length of the human eye is 17mm.

[0057] In another specific implementation of this application, the optical path system may further include a structured light forming structure, which may be disposed within the light transmission channel, located between the illumination lens 13 and the projection lens 14, and the structured light forming structure coincides with the exit pupil surface 15, to collect the scattered light projected by the illumination lens 13 and to block the light projected onto the fovea of ​​the user's fundus 16 in a predetermined blocking manner, thereby forming a predetermined pattern. In this example, the predetermined pattern may be a pattern of shape such as a ring pattern. The specific shape of the predetermined pattern can be determined according to business requirements, and this embodiment does not impose any limitations on it.

[0058] The projection lens 14 can project the pattern formed by the structured light structure onto the user's pupil 17, and form a red light illumination area with the set pattern on the user's fundus 16 through the human eye.

[0059] In one specific implementation of this application, the structured light forming structure can block the uniform energy distribution on the pupil surface 15 by means of transmission blocking or reflection blocking to form a set pattern.

[0060] This application provides two structured light formation structures, which will be discussed below. Figure 2 and Figure 3 The two structured light forming structures provided in the embodiments of this application are described in detail below.

[0061] For the first type of structured light forming structure:

[0062] Reference Figure 2 The diagram shows a schematic of another optical path system for myopia prevention and control provided in an embodiment of this application.

[0063] In this embodiment, the structured light forming structure can be a transparent flat plate. For example... Figure 2As shown, the optical path system may include: a laser source 21, a light-diffusing plate 22, an illumination lens 23, a projection lens 24, an exit pupil surface 25, and a transparent plate 26. The transparent plate 26 has a pattern of the light-shielding portion required for the structured light application. This pattern is made of black light-absorbing or light-reflecting material, so that the uniform light spot on the exit pupil surface 25 acquires the structured light pattern information after passing through the transparent plate 26. In this example, the pattern of the light-shielding portion can be printed on the transparent plate 26, or it can be set on the transparent plate 26 in other ways, depending on the business requirements. This embodiment does not impose any limitations on this.

[0064] The central region of the transparent plate 26 is opaque. The transparent plate 26 can project scattered light emanating from the exit pupil surface 25 through the projection lens 24 onto the user's pupil 27 in a transmissive manner. In this example, the area of ​​this opaque region is smaller than the area of ​​the exit pupil surface 25.

[0065] The opaque area can be a black area, a circular area, or an area of ​​other shapes. Specifically, the shape of the opaque area can be determined according to business needs, and this embodiment does not impose any restrictions on it.

[0066] In this embodiment, a transparent plate 26 is provided, and the opaque area in the center of the transparent plate 26 blocks the light from the center of the exit pupil surface 25 from entering the subsequent system. Since the exit pupil surface 25 is optically conjugate with the fundus of the human eye, the circular light spot actually observed by the human eye will have a missing central portion, thereby avoiding visual stimulation of the fovea.

[0067] For the second type of structured light forming structure:

[0068] Reference Figure 3 This shows a schematic diagram of another optical path system for myopia prevention and control provided in an embodiment of this application.

[0069] The structured light forming structure provided in this embodiment can be a reflector, such as... Figure 3 As shown, the optical path system for myopia prevention and control may include: a laser source 31, a light-diffusing plate 32, an illumination lens 33, a projection lens 34, and a reflector 35.

[0070] like Figure 3 As shown, the structured light forming structure can be a reflector 35, and the central region of the reflector 35 is a hollow structure.

[0071] In this example, the light transmission channel is a folded channel, such as... Figure 3As shown, the scattered light emitted from the illumination lens 33 can be projected onto the reflector 35, and the scattered light can be reflected by the reflector 35 to the projection lens 34, and then projected onto the user's pupil 37 by the projection lens 34.

[0072] The reflector 35 can fold the optical axis of its preceding optical elements, placing the laser tube 31 and the homogenizing plate 32 to the side of the optical path system. The reflector 35 can be a planar reflector with a circular hole (not limited to a circle) in its central region. When red light exits from the illumination lens 33, it passes through the hollow reflector 35 and enters the projection lens 34. Because of the hole in the center of the reflector 35, the light in the middle cannot be reflected by the reflector 35 and continues to exit downwards through the hole, thus achieving a ring-shaped distribution of light entering the human eye. Simultaneously, it avoids visual stimulation to the fovea centralis of the user's retina 36.

[0073] In another specific implementation of this application, the light-emitting device may further include a fixed light source 38. In this example, the fixed light source 38 may be a light source of a different color than red light, such as an LED light.

[0074] The fixed light source 38 can be positioned on the side of the reflector 35 away from the projection lens 34, and the light emitted by the fixed light source 38 can be projected onto the projection lens 34 through the hollow structure of the reflector 35.

[0075] This application embodiment, by adding a fixation light source, can guide the user to focus on the center of the ring distribution, and the red light irradiation has the effect of inhibiting the growth of the axial length of the eye.

[0076] The optical path system for myopia prevention and control provided in this application includes a laser source, a light-diffusing plate, and an illumination projection system. The light-diffusing plate and the illumination projection system are disposed within the light transmission channel of the optical path system. The laser source is disposed at the entrance end of the light transmission channel. The light-diffusing plate is attached to the light output end of the laser source to scatter the light emitted by the laser source. The illumination projection system is disposed on the side of the light-diffusing plate away from the laser source and is spaced apart from the light-diffusing plate to collect the scattered light emitted by the light-diffusing plate and project the scattered light onto the user's pupil. This embodiment of the application sets up a light homogenizing plate and an illumination projection system in the light transmission channel. The light homogenizing plate is attached to the light output end of the laser source so that after the laser beam hits the light homogenizing plate, the collimation of the laser is removed, and the red light is scattered and propagated backward. The scattered light is then projected onto the user's pupil through the illumination projection system, which can achieve a uniform surface illumination distribution on the fundus. This allows the eye to see a large-diameter uniform surface light spot during phototherapy, thereby reducing visual stimulation to the human eye and increasing the intensity of red light irradiation in the peripheral macular area, achieving uniform phototherapy and improving the effect of inhibiting axial elongation.

[0077] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus 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 apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0078] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

[0079] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included 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 optical path system for myopia prevention and control, characterized in that, include: Laser source, light homogenizer and illumination projection system, among which, The light-diffusing plate and the illumination projection system are disposed within the light transmission channel of the optical path system, and the laser source is disposed at the entrance end of the light transmission channel; The light-diffusing plate is attached to the light output end of the laser source to scatter the light emitted by the laser source; The lighting projection system is positioned on the side of the light-diffusing plate away from the laser source and is spaced apart from the light-diffusing plate to collect the scattered light emitted by the light-diffusing plate and project the scattered light onto the user's pupil; The lighting projection system includes: an illumination lens and a projection lens; The system also includes: a structured light forming structure; The structured light forming structure is a reflector, and the central region of the reflector is a hollow structure. The light transmission channel is a folded channel. The scattered light emitted from the illumination lens is projected onto the reflector, which then reflects the scattered light to the projection lens, and finally projects the scattered light into the user's pupil.

2. The system according to claim 1, characterized in that, The illumination lens is disposed on the side of the light-diffusing plate away from the laser source and is spaced apart from the light-diffusing plate to collect the scattered light and project the scattered light onto the projection lens; The projection lens and the illumination lens are spaced apart to project the scattered light onto the user's pupil.

3. The system according to claim 2, characterized in that, An exit pupil surface is attached to the side of the illumination lens away from the light-diffusing plate to ensure that the energy of the light spot projected onto the exit pupil surface is evenly distributed.

4. The system according to claim 3, characterized in that, The light-diffusing plate is located on the front focal plane of the illumination lens so that the scattered light rays are uniformly irradiated on the exit pupil surface.

5. The system according to claim 3, characterized in that, The exit pupil surface is located at the front focal plane of the projection lens so that the scattered light is uniformly projected onto the user's pupil.

6. The system according to claim 3, characterized in that, The user's pupil is located at the back focal plane of the projection lens, so that light emitted from various positions on the exit pupil plane can pass through the pupil and illuminate the user's fundus.

7. The system according to claim 3, characterized in that, The structured light forming structure is disposed within the light transmission channel, located between the illumination lens and the projection lens, and the structured light forming structure coincides with the exit pupil surface to collect the scattered light projected by the illumination lens and to block the light projected to the fovea of ​​the user's fundus in a set blocking manner to form a set pattern. The projection lens projects the pattern formed by the structured light forming structure onto the user's pupil, and forms a red light illumination area with a set pattern on the user's retina through the human eye.

8. The system according to claim 7, characterized in that, The structured light forming structure blocks the uniform energy distribution on the exit pupil surface by means of transmission blocking or reflection blocking, thereby forming the set pattern.

9. The system according to claim 8, characterized in that, The structured light forming structure is a transparent plate, on which a pattern is provided for the light-shielding portion of the structured light required for the application, so that the uniform light spot on the exit pupil surface acquires the pattern information of the structured light after passing through the transparent plate. The central area of ​​the transparent plate is an opaque area, and the scattered light emitted from the exit pupil surface is projected onto the user's pupil through the projection lens in a transmission-blocking manner.

10. The system according to claim 1, characterized in that, The system also includes: a fixed-view light source, The fixed-view light source is located on the side of the reflector away from the projection lens, and the light emitted by the fixed-view light source is projected onto the projection lens through the hollow structure of the reflector.

11. The system according to claim 1, characterized in that, The light-diffusing plate is made of a material with light-scattering properties.

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