Out-of-focus remote image read-write device

Abstract

The invention discloses an out-of-focus remote image read-write device, and the device comprises a remote image light path which comprises a plane spectroscope and a first reflector; wherein the plane spectroscope is obliquely arranged, and the first reflector is horizontally or vertically arranged; the out-of-focus light path comprises the plane spectroscope, a lens array and a second reflecting mirror; wherein the second reflector is vertically or horizontally arranged, the second reflector and the first reflector are respectively arranged at two sides of the plane spectroscope and are perpendicular to each other in a use state, the lens array is arranged between the plane spectroscope and the second reflector, and the lens array comprises a plurality of out-of-focus lenses which are discretely distributed in a non-central area of the substrate. Areas among the defocus lenses are light-proof. According to the out-of-focus remote image read-write device, a plurality of out-of-focus images which are discretely distributed in the peripheral area of the view can be formed while a desktop image is normally imaged, 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 defocused 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 defocused telephoto 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 telephoto 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 telephoto images at different distances. One of the optical paths is designed 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 defocus lenses currently on the market can only provide two fixed focal length options, which makes their ability to control the axial length of the eye relatively limited. In order to break through 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 defocused long-image reading and writing device.

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

[0007] A defocused long-image 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, a lens array and a second reflector; wherein the second reflector is arranged vertically or horizontally, and the second reflector and the first reflector are respectively arranged on both sides of the plane beam splitter and are perpendicular to each other when in use, the lens array is arranged between the plane beam splitter and the second reflector, and the lens array comprises a plurality of defocused lenses discretely distributed in a non-central area of ​​a substrate, and the area between each defocused lens is opaque to light.

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

[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 second reflector first passes through the lens array, then directed toward the second reflector, and after being reflected by the second reflector, passes through the lens array again to form multiple beams of light, and are directed toward the plane beam splitter respectively, and after being split by the plane beam splitter, are directed toward the exit pupil position, and form multiple defocused images distributed in the peripheral field of view of the human eye.

[0013] Preferably, the optical powers of the multiple defocus lenses are not completely the same.

[0014] Preferably, a plurality of defocus lenses are distributed in a non-central area of ​​the substrate.

[0015] Preferably, the defocus amounts corresponding to the multiple defocused images are between +1D and +10D.

[0016] Preferably, the lens array includes positive lenses and / or negative lenses.

[0017] Preferably, the shapes of the defocus lenses are identical or not identical.

[0018] Preferably, the lens array is replaceable.

[0019] Preferably, the regions between the defocused lenses are provided with light absorbing and / or light scattering materials.

[0020] Preferably, the surface of the second reflector is provided with light scattering points, and / or the surface of the defocusing lens is coated to adjust the contrast.

[0021] The defocused telephoto reading and writing device provided by the present invention superimposes a freely customizable lens array on the existing dual-optical path defocused optical system. This design not only retains the function of the telephoto optical path to magnify the desktop image and the function of the defocused optical path to inhibit the growth of the eye axis, but also can flexibly customize a variety of lens arrays according to the special needs of different human eyes, 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, effectively meeting the refined needs of different individuals for axial length correction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the optical path of the defocused telescopic reading and writing device provided by the present invention;

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

[0024] Figure 3 It is a schematic diagram of the structure of the defocused telescopic image reading and writing device provided by the present invention. DETAILED DESCRIPTION

[0025] 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.

[0026] 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.

[0027] 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.

[0028] like Figures 1 to 3 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. The telescopic optical path and the defocused optical path are Birdbath optical paths and share a plane beam splitter 2.

[0029] 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, a lens array 4 and a second reflector 5. When in working state, the second reflector 5 is vertically or horizontally arranged. The second reflector 5 and the first reflector 3 are respectively arranged on both sides of the plane beam splitter 2 and are perpendicular to each other when in use. The second reflector 5 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 light. The lens array 4 is arranged between the plane beam splitter 2 and the second reflector 5. The lens array 4 includes a plurality of defocus lenses 42 arranged in a substrate 41, and the area between each defocus lens 42 is opaque.

[0030] 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 second reflector 5 respectively; the light directed toward the first reflector 3 ( Figure 1 The light 81 is reflected by the first reflector 3 to the plane beam splitter 2 and split again, and then emitted to the exit pupil position 6. After passing through the ciliary muscle 61 and entering the human eye, it converges on the retina 62 to form a clear image, forming a distant image of not less than 3 meters; the light emitted to the second reflector 5 ( Figure 1 The transmitted light 82) first passes through the lens array 4, then is reflected by the second reflector 5, and then is transmitted through the lens array 4 again 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, and after passing through the ciliary muscle 61 and entering the human eye, they converge in front of the retina 62 and form multiple defocused images distributed in the peripheral field of view of the human eye. The multiple defocused images are distributed around the center of the distant image.

[0031] Among them, the first reflector 3 and the second reflector 5 are curved reflectors, and the curvature radii of the first reflector 3 and the second reflector 5 can be the same or different. The defocus amount of different defocused images in the defocused light path is changed by setting a lens array 4 in front of the second reflector 5.

[0032] The structure of the lens array 4 is as follows Figure 2As shown, the lens array 4 includes a substrate 41, which is a flat substrate or a curved substrate. A plurality of defocus lenses 42 are discretely distributed in a non-central area of ​​the substrate 41. The area between each defocus lens 42 is opaque and can be a scattering surface and / or a light absorbing surface.

[0033] The light emitted from the plane beam splitter 2 to the multiple defocusing lenses 42 passes through the defocusing lenses 42 and then is emitted to the second reflector 5 and reflected, and then passes through the defocusing lenses 42 to form multiple converging light beams, and is emitted to the plane beam splitter 2. After being split by the plane beam splitter 2, it is emitted to the exit pupil position 6. The multiple converging light beams respectively form defocused images, providing defocus stimulation to the human eye and changing the contrast of the overlapping area of ​​the distant image and the defocused image; the light emitted from the plane beam splitter 2 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.

[0034] exist Figure 2 In the embodiment, the central area of ​​the substrate 41 is a light absorption area, and a plurality of defocus lenses 42 are discretely distributed in a non-central area of ​​the substrate 41. The plurality of defocus lenses 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 defocus lenses 42 has a regular or irregular pattern, or a plurality of regular or irregular shapes are spliced ​​into a complete pattern to achieve light transmission. The surfaces of the plurality of defocus lenses 42 can be coated with a filter film, a polarizing film, or an anti-reflection and anti-reflection composite film to adjust the contrast.

[0035] Light scattering points can be set at positions other than the defocus lenses 42 in the non-central area of ​​the substrate 41, for example, by setting a coating or ink layer to form scattering points between the defocus lenses 42. In this way, multiple defocused images arranged around the central field of view can be superimposed on the distant image, and light scattering spots can be superimposed to change the local contrast around the distant image. The distances of the multiple defocused images from the exit pupil position depend on the equivalent optical power of the equivalent lens array composed of the second reflector 5 and the multiple defocus lenses 42.

[0036] In the lens array 4, the defocus lens 42 is a positive lens or a negative lens, and the optical focal lengths of the multiple defocus lenses 42 are not completely the same. The convergent light beams adjusted by the multiple defocus lenses 42 form multiple defocus images around the central area in the human eye field, and the defocus amounts corresponding to the multiple defocus images are between +1D and +10D. The optical focal lengths of the multiple defocus lenses 42 can be customized according to the conditions of the human eye.

[0037] On the substrate 41, the size of the defocus lens 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 defocus lens 42, and does not strictly limit the size of the second lens 42. The distribution of the defocus lens 42 is varied, and the shapes of the defocus lenses 42 can be the same or not completely the same. For example, defocus lenses 42 of different shapes such as circular, hexagonal, square, and elliptical are used. The shape of the defocus lens 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 optical focal length of the second reflector 5 and the defocus lens 42.

[0038] In this application, the lens array 4 in the same myopia prevention and control long-range image reading and writing device is replaceable. By replacing different lens arrays 4, the positions, shapes and corresponding defocus amounts of multiple defocused images can be changed.

[0039] In addition, as another application, the surface of the substrate 41 facing the exit pupil position adopts a partitioned functional treatment. In addition to the light transmission area, the surface of the substrate 41 facing the exit pupil side is also provided with a light reflection area and / or a scattering area, wherein the light reflection area and the scattering area are provided with reflection pits or sprayed with a paint-like coating, 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 transmission area, the reflection area and the scattering area is adjustable.

[0040] When not in use, the positions of the plane beam splitter 2, the first reflector 3 and the second reflector 5 are different according to the different product forms of the myopia prevention and control telescopic reading and writing device.

[0041] For example, Figure 3 As shown, for a fixed myopia prevention and control telescopic reading and writing device, a plane beam splitter 2, a first reflector 3, a lens array 4 and a second reflector 5 are arranged in a shell 10, and the shell 10 is set on a desktop through a bracket 15. The upper front shell 12 of the shell 10 is detachable to replace the lens array; when not in use, the positions of the plane beam splitter 2, the first reflector 3, the lens array 4 and the second reflector 5 remain unchanged.

[0042] For the foldable myopia prevention and control telescopic reading and writing device, the structure is similar, the difference is that: when not in use, the plane beam splitter 2, the first reflector 3, the lens array 4 and the second reflector 5 can be rotated to an overlapping state.

[0043] The following is an example of a myopia prevention and control telescopic reading and writing device, which has an exit pupil distance between 150mm and 300mm, an eye movement range of not less than φ60mm, a field of view angle of not less than 35° and not more than 42°, and can adapt to the imaging of a book with a flat area of ​​two pages of A4 size paper.

[0044] Among them, it includes a plane beam splitter 2, a first reflector 3, a lens array 4 and a second reflector 5, the equivalent focal length of the equivalent reflector array formed by the combination of the lens array 4 and the second reflector 5 is different from the focal length of the first reflector 3, wherein the equivalent reflector array formed by the combination of the lens array 4 and the second reflector 5 is used for positive defocus imaging, and the equivalent focal length of the lens array 4 and the second reflector 5 is smaller than the focal length of the first reflector 3.

[0045] The radius of curvature of the first reflector 3 and the second reflector 5 is in the range of 400 mm to 600 mm. Preferably, the thickness of the defocus lens 42 in the lens array 4 is 0.7 to 2.0 mm. When the defocus lens 42 in the lens array 4 is a plano-convex lens, the radius of curvature of the convex surface of each defocus lens 42 is greater than or equal to 1000 mm; when the defocus lens 42 in the lens array 4 is a plano-concave lens, the radius of curvature of the concave surface of each defocus lens 42 is greater than or equal to 1200 mm; when the defocus lens 42 in the lens array 4 is a concave-convex lens, the radius of curvature of the concave surface of each defocus lens 42 is in the range of 350 mm to 450 mm, and the radius of curvature of the convex surface is in the range of 250 mm to 450 mm; when the defocus lens 42 in the lens array 4 is a biconcave lens, the radius of curvature of the concave surface of each defocus lens 42 is in the range of 300 mm to 450 mm.

[0046] Furthermore, an appropriate amount of scattering points can be sprayed on the surface of the second reflector 5 to reduce the contrast of the positive defocused image; the surface of the defocused lens 42 can also be covered with a filter film, a polarizing film, or an anti-reflection and anti-reflection composite film to adjust the contrast; the contrast of the positive defocused image can be adjusted by adjusting the reflectivity of the reflective film of the second reflector 5 and the distribution density and surface morphology of the scattering points on its surface, as well as adjusting the type of coating on the surface of the defocused lens 42.

[0047] In summary, the defocused telephoto reading and writing device provided by the present invention superimposes a freely customizable lens array on the existing dual-optical path defocus optical system. This design not only retains the functions of the telephoto optical path to magnify and project the desktop image and the defocus optical path to perform defocus stimulation, but also can flexibly customize a variety of lens arrays according to the special needs of different human eyes, 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 stimulation, which effectively meets the refined needs of different individuals for axial length correction.

[0048] The above is a detailed description of a defocused 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 defocused 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, a lens array and a second reflector; wherein the second reflector is arranged vertically or horizontally, and the second reflector and the first reflector are respectively arranged on both sides of the plane beam splitter and are perpendicular to each other when in use, the lens array is arranged between the plane beam splitter and the second reflector, and the lens array comprises a plurality of defocused lenses discretely distributed in a non-central area of ​​a substrate, and the area between each defocused lens is opaque to light.

2. The defocused 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 second reflector 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 second reflector first passes through the lens array, then directed toward the second reflector, and after being reflected by the second reflector, it passes through the lens array again to form multiple beams of light. The multiple beams of light are respectively directed toward the plane beam splitter, and 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 around the central field of view in the peripheral field of view of the human eye.

3. The defocused telescopic reading and writing device according to claim 1 or 2, characterized in that: The optical powers of multiple defocus lenses are not exactly the same.

4. The defocused telescopic reading and writing device according to claim 3, characterized in that: A plurality of defocusing lenses are distributed in a non-central area of ​​the substrate.

5. The defocused telescopic reading and writing device according to claim 3, characterized in that: The defocus amounts corresponding to the multiple defocused images are between +1D and +10D.

6. The defocused telescopic reading and writing device according to claim 1, characterized in that: The lens array includes positive lenses and / or negative lenses.

7. The defocused telescopic reading and writing device according to claim 1, characterized in that: The shapes of the defocus lenses are the same or not completely the same.

8. The defocused telescopic reading and writing device according to claim 1, characterized in that: The lens array is replaceable.

9. The defocused telescopic reading and writing device according to claim 1, characterized in that: The regions between the individual defocusing lenses are provided with light absorbing and / or light scattering materials.

10. The defocused telescopic reading and writing device according to claim 1, characterized in that: The surface of the second reflector is provided with light scattering points, and / or the surface of the defocusing lens is coated to adjust the contrast.

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