Myopia prevention and control far image read-write device

Abstract

The invention discloses a myopia prevention and control far image read-write device comprising a far image light path comprising a plane spectroscope and a first reflector; wherein the plane spectroscope is obliquely arranged, and the first reflector is horizontally or vertically arranged; the defocus light path comprises the plane spectroscope and a reflector array; wherein the reflector array is vertically or horizontally arranged, the reflector array and the first reflector are respectively arranged on two sides of the plane spectroscope and are perpendicular to each other in a use state, and the reflector array comprises a plurality of second reflectors which are discretely distributed on the surface of one side of the substrate; the areas between the second reflectors absorb and / or scatter light. The myopia prevention and control far image read-write device can form a plurality of out-of-focus images discretely distributed in the peripheral area of the visual field while normally imaging a desktop image, and the out-of-focus amounts corresponding to the plurality of out-of-focus images can be the same or different, so that personalized out-of-focus stimulation is formed.

Description

Technical Field

[0001] The invention relates to a myopia prevention and control telescopic image reading and writing device, and relates to the field of myopia prevention and control. Background Art

[0002] In today's era of highly developed digitalization, people's eye use scenarios are becoming increasingly complex and long-term concentrated eye use is common. According to survey data, myopia has become a problem that plagues a large number of people around the world, especially young people. The incidence of myopia has shown a trend of increasing year by year and at a younger age. At present, the myopia problem among teenagers is becoming more and more serious. The root cause is that teenagers' eyes are now focused on a relatively close range most of the time. In order to adapt to close-range imaging, the eye axis gradually becomes longer. In order to solve this problem, various myopia prevention and control products have emerged on the market.

[0003] The myopia prevention and control telescopic reading and writing device is one of the many existing myopia prevention and control devices. With the help of optical principles, it allows users to simulate telescopic state when reading and writing at close range, thereby relieving eye fatigue. It cleverly uses a beam splitter and a reflector to form two birdbath optical paths, thereby forming two telescopic images at different distances. The design function of one optical path is to zoom in on close objects and display them clearly, ensuring that the image can be accurately imaged on the retina, while the other optical path sets the object imaging position in front of the retina, which can effectively inhibit the further extension of the viewer's eye axis.

[0004] However, this defocus protection method also has certain limitations. Different people's eyes require different degrees of vision correction, and the reflectors currently on the market can only provide fixed focal length options, which leads to relatively limited ability to control the axial length of the eye. In order to overcome this limitation, we need to introduce more auxiliary means to increase the flexibility of myopia prevention and control and realize personalized customized services. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a myopia prevention and control telescopic reading and writing device.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0007] A myopia prevention and control telescopic reading and writing device, comprising:

[0008] A telescopic optical path, comprising a plane beam splitter and a first reflector; wherein the plane beam splitter is tilted, and the first reflector is horizontally or vertically arranged; and,

[0009] A defocused optical path comprises the plane beam splitter and a reflector array; wherein the reflector array is arranged vertically or horizontally, and the reflector array and the first reflector are respectively arranged on both sides of the plane beam splitter and are perpendicular to each other when in use, and the reflector array comprises a plurality of second reflectors discretely distributed on a surface of one side of a substrate, and the area between each second reflector absorbs and / or scatters light.

[0010] Preferably, the light emitted from the desktop direction toward the plane beam splitter is respectively emitted toward the first reflector and the reflector array after being split by the plane beam splitter;

[0011] The light directed to the first reflector is reflected by the first reflector to the plane beam splitter, split again, and then directed to the exit pupil position to form a telescopic image of not less than 3 meters;

[0012] The light directed toward the reflector array is reflected by multiple second reflectors in the reflector array to form multiple beams of light. The multiple beams of light are respectively directed toward the plane beam splitter. After being split by the plane beam splitter, they are respectively directed toward the exit pupil position to form defocused images. The multiple defocused images are discretely distributed in the peripheral field of view of the human eye around the central field of view.

[0013] Preferably, the curvature radii of the plurality of second reflectors are completely the same or not completely the same, and the second reflectors are concave reflectors.

[0014] Preferably, the curvature radius of the first reflector and the second reflector ranges from 400 mm to 750 mm.

[0015] Preferably, the defocus amounts corresponding to the multiple defocus images are not completely the same and are between +1D and +10D.

[0016] Preferably, a plurality of the second reflectors are discretely distributed in a non-central area of ​​the substrate.

[0017] Preferably, the shapes of the second reflectors are identical or different.

[0018] Preferably, the reflector array is replaceable.

[0019] Preferably, a light absorbing material is attached to the other side surface of the substrate, and the substrate can be flipped over and inserted into the original position.

[0020] Preferably, a plurality of scattering points are arranged on the surface of the second reflector.

[0021] The myopia prevention and control telephoto reading and writing device provided by the present invention introduces a customizable reflector array into the existing dual-optical path defocus optical system. This design not only retains the function of the telephoto optical path to magnify and project the desktop image, but also can flexibly customize a variety of reflector arrays according to the special needs of different human eyes to form multiple defocused images, and suppress the growth of the eye axis through defocusing, thereby obtaining different defocus effects. This solution can form multiple defocused images discretely distributed in the peripheral area of ​​the field of view while imaging the desktop image normally. The defocus amounts corresponding to the multiple defocused images can be the same or different, thereby forming a personalized defocus stimulus, which effectively meets the refined needs of different individuals for axial length correction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of an optical path of the myopia prevention and control telescopic reading and writing device provided by the present invention;

[0023] Figure 2 is a top view schematic diagram of the reflector array;

[0024] Figure 3 It is a structural diagram of a telescopic reading and writing device for myopia prevention and control;

[0025] Figure 4 This is another optical path schematic diagram of the myopia prevention and control telescopic reading and writing device provided by the present invention;

[0026] Figure 5 It is another structural schematic diagram of a long-range image reading and writing device for myopia prevention and control. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] like Figure 1 and Figure 4 As shown, the myopia prevention and control telescopic reading and writing device provided by the present invention has dual imaging optical paths, namely, a telescopic optical path and a defocused optical path, and the telescopic optical path and the defocused optical path are Birdbath optical paths for imaging the desktop image and share a plane beam splitter 2. The pupil distance of the myopia prevention and control telescopic reading and writing device is between 150mm and 300mm, the eye movement range is not less than φ60mm, the field of view angle is not less than 35° and not more than 42°, and can adapt to the imaging of two flat pages of A4 paper.

[0031] The telephoto optical path includes a plane beam splitter 2 and a first reflector 3. When in working state, the plane beam splitter 2 is tilted and the first reflector 3 is horizontally or vertically arranged. The defocus optical path includes a plane beam splitter 2 and a reflector array 4. When in working state, the reflector array 4 is vertically or horizontally arranged, and the reflector array 4 and the first reflector 3 are respectively arranged on both sides of the plane beam splitter 2 and the reflector array 4 and the first reflector 3 are perpendicular to each other. The reflector array 4 and the first reflector 3 are respectively used to reflect the reflected light 81 and the transmitted light 82 generated after the plane beam splitter 2 splits; the reflector array 4 includes a plurality of second reflectors 42 discretely distributed on one side surface of the substrate 41, and the area between each second reflector 42 absorbs and / or scatters light.

[0032] During the use of the device for myopia prevention and control and telescopic reading and writing, the desktop area 1 below the plane beam splitter 2 is where books or display screens are placed. Light 8 directed toward the plane beam splitter 2 from the desktop direction is split by the plane beam splitter 2 and then directed toward the first reflector 3 and the reflector array 4 respectively; the light directed toward the first reflector 3 ( Figure 1 To reflect light 81, Figure 4 The light 82 is transmitted, is reflected by the first reflector 3 to the plane beam splitter 2 and split again, and then is directed to the exit pupil 6. After passing through the ciliary muscle 61 and entering the human eye, it is focused on the retina 62 to form a clear image, forming a distant image of not less than 3 meters. The light directed to the reflector array 4 ( Figure 1 is the transmitted light 82, Figure 4 The reflected light 81 is reflected by the multiple second reflectors 42 in the reflector array 4 to form multiple beams of converging light, which are respectively emitted to the plane beam splitter 2. After being split by the plane beam splitter 2, they are emitted to the exit pupil position 6. Each beam of light converges in front of the retina 62 after passing through the ciliary muscle 61 and enters the human eye, and forms a defocused image distributed in the peripheral field of view of the human eye. The multiple defocused images formed by the multiple beams of light are distributed around the center of the distant image.

[0033] The structure of the reflector array 4 is as follows: Figure 2 As shown, the reflector array 4 includes a substrate 41, which is a flat substrate or a curved substrate. A plurality of discretely distributed second reflectors 42 are arranged on one side surface of the substrate 41. The area between each second reflector 42 is a scattering surface and / or a light absorbing surface. A light absorbing material is attached to the other side surface of the substrate 41. The substrate 41 can be flipped and inserted into the original position to turn off the defocusing function. When the defocusing optical path is required, one side of the substrate 41 provided with the plurality of second reflectors 42 faces the plane beam splitter 2, and is used to reflect the light emitted from the plane beam splitter 2 to the reflector array 4; when the defocusing optical path is not used, the substrate 41 is flipped, and at this time, the side surface of the substrate 41 facing the plane beam splitter 2 is a light absorbing surface, and does not reflect or scatter the light emitted from the plane beam splitter 2.

[0034] When the surface of the substrate 41 provided with multiple second reflectors 42 is arranged toward the plane beam splitter 2 and is arranged in the optical path, the light directed to the multiple second reflectors 42 is reflected respectively to form independent converging light beams, directed to the plane beam splitter 2, and after being split by the plane beam splitter 2, directed to the exit pupil position 6 to form a defocused image, while the light directed to other positions of the substrate 41 is absorbed or scattered, and the scattered light can be used to change the contrast of the local area of ​​the distant image.

[0035] like Figure 2 As shown, as an application, the central area of ​​the substrate 41 is a light absorption area, and a plurality of second reflectors 42 are discretely distributed in the non-central area of ​​the substrate 41. The plurality of second reflectors 42 are arranged on the substrate 41 with a flat or curved surface according to a certain pattern, and the arrangement of the plurality of second reflectors 42 has a regular or irregular pattern, or a plurality of regular or irregular shapes are spliced ​​into a complete pattern to achieve light reflection. A reflective film is attached to the surface of the second reflector 42, which is used to form a defocused image through reflection. The defocused image can also reduce the contrast of the area where the distant image overlaps with it. A plurality of scattering points can also be set on the surface of the second reflector 42 by means of surface coating or spraying. The contrast of the positive defocused image can be adjusted by adjusting the reflectivity of the reflective film, the distribution density of the scattering points, and the surface morphology.

[0036] Light scattering points 43 can be set in the non-central area of ​​the substrate 41 except the second reflector 42, for example, by setting a coating or ink layer to form scattering points 43 between the second reflectors 42. In this way, multiple defocused images arranged around the central field of view can be superimposed on the peripheral area of ​​the distant image, and light scattering spots can be superimposed to change the local contrast around the distant image. The distances from the multiple defocused images to the exit pupil position 6 depend on the curvature radius of the multiple second reflectors 42. Different image distances correspond to different defocus amounts.

[0037] In the reflector array 4, the second reflector 42 is a concave reflector, and the curvature radii of the plurality of second reflectors 42 are completely the same or not completely the same. The plurality of converging light beams formed after reflection by the plurality of second reflectors 42 respectively form a plurality of defocused images around the central area in the field of vision of the human eye, and the defocus amounts corresponding to the plurality of defocused images are between +1D and +10D. The curvature radii of the plurality of second reflectors 42 can be customized according to the conditions of the human eye. The curvature radii of the first reflector 3 and the second reflector 42 range from 400 mm to 750 mm.

[0038] On the substrate 41, the size of the second reflector 42 can be adjusted according to the degree of customization, for example, between φ8mm and φ60mm. The size given here is only used to illustrate the preferred size range of the second reflector 42, and does not strictly limit the size of the second reflector 42. The second reflector 42 can be distributed in various ways, and the shapes of the second reflectors 42 can be the same or not completely the same. For example, the second reflectors 42 of different shapes such as circular, hexagonal, square, and elliptical are used. The shape of the second reflector 42 affects the shape of the defocused image, but has no effect on the defocus amount of the defocused image. The defocus amount of the defocused image is determined by the curvature radius of the second reflector 42.

[0039] In this application, the mirror array 4 in the same myopia prevention and control long-range image reading and writing device is replaceable. By replacing the mirror array 41 including different second mirrors 42, the position, shape and corresponding defocus amount of multiple defocused images can be changed.

[0040] In addition, as another application, the surface of the substrate 41 facing the exit pupil position can be processed by partitioning functionality, and the surface of the substrate 41 facing the exit pupil side is provided with a light reflection area and a scattering area at the same time, wherein the light reflection area is provided with a plurality of reflector arrays, and a paint-like coating is sprayed on the scattering area, which is used to reflect light toward the exit pupil position while scattering part of the light, thereby achieving the purpose of defocus protection and contrast control. The area ratio of the reflection area and the scattering area is adjustable.

[0041] As another application, the surface of the substrate 41 facing the exit pupil position may also be provided with only a light reflection area, and a plurality of second reflectors 42 are provided in the light reflection area, and the portion of the surface other than the light reflection area is a light absorption area.

[0042] When not in use, the positions of the plane beam splitter 2, the first reflector 3 and the reflector array 4 are different according to the different product forms of the myopia prevention and control telescopic reading and writing device.

[0043] For example, Figure 3 As shown, for the fixed myopia prevention and control long-range image reading and writing device, the plane beam splitter 2, the first reflector 3 and the reflector array 4 are arranged in the shell 10, and the shell 10 is set on the desktop through the bracket 15. The upper front shell 12 of the shell 10 is detachable, so as to replace or flip the reflector array 4; when not in use, the positions of the plane beam splitter 2, the first reflector 3 and the reflector array 4 remain unchanged.

[0044] For example, Figure 5 As shown, the foldable myopia prevention and control telescopic reading and writing device includes a back plate, a plane beam splitter 2, a first reflector 3, a reflector array 4 and a bracket 7, the back plate and the bracket 7 are connected, the plane beam splitter 2 and the first reflector 3 are rotatably connected to the upper end of the back plate respectively, and the reflector array 4 is arranged on the back plate, facing the plane beam splitter 2; when in use, the first reflector 3 is rotated to a position perpendicular to the back plate, and the plane beam splitter 2 is rotated to an inclined position between the first reflector 3 and the back plate, and the inclined angle is preferably an angle between the plane beam splitter 2 and the back plate of 35° to 55°; when not in use, the plane beam splitter 2, the first reflector 3 and the reflector array 4 can be rotated to an overlapping state.

[0045] In summary, the myopia prevention and control telephoto reading and writing device provided by the present invention introduces a customizable reflector array into the existing dual-optical path defocus optical system. This design not only retains the function of the telephoto optical path to magnify and project the desktop image, but also can flexibly customize a variety of reflector arrays according to the special needs of different human eyes, forming multiple defocused images, and suppressing the growth of the eye axis through defocusing, thereby obtaining different defocus effects. This solution can form multiple defocused images discretely distributed in the peripheral area of ​​the field of view while imaging the desktop image normally. The defocus amounts corresponding to the multiple defocused images can be the same or different, thereby forming a personalized defocus stimulus, which effectively meets the refined needs of different individuals for axial length correction.

[0046] The above is a detailed description of a myopia prevention and control telescopic reading and writing device provided by the present invention. For those skilled in the art, any obvious changes made to it without departing from the essence of the present invention will constitute an infringement of the patent right of the present invention and will bear corresponding legal responsibilities.

Claims

1. A myopia prevention and control telescopic reading and writing device, characterized in that include: A telescopic optical path, comprising a plane beam splitter and a first reflector; wherein the plane beam splitter is tilted, and the first reflector is horizontally or vertically arranged; and, A defocused optical path comprises the plane beam splitter and a reflector array; wherein the reflector array is arranged vertically or horizontally, and the reflector array and the first reflector are respectively arranged on both sides of the plane beam splitter and are perpendicular to each other when in use, and the reflector array comprises a plurality of second reflectors discretely distributed on a surface of one side of a substrate, and the area between each second reflector absorbs and / or scatters light.

2. The myopia prevention and control telescopic reading and writing device according to claim 1, characterized in that: The light emitted from the desktop to the plane beam splitter is split by the plane beam splitter and then emitted to the first reflector and the reflector array respectively; The light directed to the first reflector is reflected by the first reflector to the plane beam splitter, split again, and then directed to the exit pupil position to form a telescopic image of not less than 3 meters; The light directed toward the reflector array is reflected by multiple second reflectors in the reflector array to form multiple beams of light. The multiple beams of light are respectively directed toward the plane beam splitter. After being split by the plane beam splitter, they are respectively directed toward the exit pupil position to form defocused images. The multiple defocused images are discretely distributed in the peripheral field of view of the human eye around the central field of view.

3. The myopia prevention and control telescopic reading and writing device according to claim 1 or 2, characterized in that: The curvature radii of the plurality of second reflectors are completely the same or not completely the same, and the second reflectors are concave reflectors.

4. The myopia prevention and control telescopic reading and writing device according to claim 3, characterized in that: The curvature radius of the first reflector and the second reflector ranges from 400 mm to 750 mm.

5. The myopia prevention and control telescopic reading and writing device according to claim 3, characterized in that: The defocus amounts corresponding to the multiple defocused images are not completely the same and are between +1D and +10D.

6. The myopia prevention and control telescopic reading and writing device according to claim 1, characterized in that: A plurality of the second reflectors are discretely distributed in a non-central area of ​​the substrate.

7. The myopia prevention and control telescopic reading and writing device according to claim 1, characterized in that: The shapes of the second reflectors are the same or different.

8. The myopia prevention and control telescopic reading and writing device according to claim 1, characterized in that: The reflector array is replaceable.

9. The myopia prevention and control telescopic reading and writing device according to claim 1, characterized in that: The other side surface of the substrate is attached with light absorbing material, and the substrate can be turned over and inserted into the original position.

10. The myopia prevention and control telescopic reading and writing device according to claim 1, characterized in that: A plurality of scattering points are arranged on the surface of the second reflector.

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