A telescopic imaging optical system with peripheral visual area defocusing

Abstract

The present invention discloses a long-distance imaging optical system with peripheral visual zone defocusing, comprising: a defocusing panel: located directly above an observed object, comprising a flat panel area and a microlens array area; the flat panel area is used to directly transmit light emitted by the observed object; the microlens array area is used to perform a first imaging of the peripheral area of ​​the observed object to form a real image; an objective lens: located directly above the defocusing panel, used to perform a first imaging of the observed object to form a virtual image of the observed object, and to receive the real image of the peripheral area of ​​the observed object and perform a second imaging to form a virtual image of the peripheral area of ​​the observed object; an eyepiece: located directly in front of a human eye, performing a second imaging of the observed object to form a magnified long-distance virtual image in front of the human eye, and to receive the virtual image of the peripheral area of ​​the observed object to form a real image in front of the peripheral retina of the human eye. The present application can better achieve the effect of myopic defocusing in the peripheral visual zone and better achieve the purpose of myopia prevention and control.

Description

Technical Field

[0001] The present application relates to the field of optical imaging detection technology, and in particular to a long-distance imaging optical system with peripheral visual area defocusing. Background Art

[0002] Myopia has become a major public health issue affecting the health of our country's citizens, especially young people. Long-term close-up viewing and working are one of the main causes of myopia. The reading and writing table optical system can image the desktop content in the air from a long distance, realizing the transformation from "near vision" to "far vision", thereby achieving the purpose of myopia prevention and control.

[0003] At the same time, a large number of medical studies have shown that making the imaging focus of the periphery of the viewing content fall in front of the peripheral retina to form myopic defocus can delay the growth of the eye axis, thereby preventing myopia or delaying the development of myopia. However, most of the existing coaxial reading and writing tables do not have the defocus function. The few coaxial reading and writing tables with the defocus function have low light efficiency, uneven brightness in the defocus area, and large differences, which can easily cause visual fatigue, thus affecting the effect of myopia prevention and control. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a long-distance imaging optical system with defocused peripheral visual areas, and proposes an off-axis type reading and writing table with a defocusing function, which solves the problems of low light efficiency, uneven brightness in the defocused area, and large differences in the existing defocused reading and writing tables.

[0005] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is: a telephoto imaging optical system with peripheral visual area defocusing, comprising:

[0006] Defocus panel: located directly above the observed object, including the flat panel area and the microlens array area;

[0007] The flat plate area is used to transmit light directly from the object being observed;

[0008] The microlens array area is used to perform the first imaging of the peripheral area of ​​the observed object to form a real image;

[0009] Objective lens: located just above the defocus panel, used to image the observed object for the first time, forming a virtual image of the observed object, and to receive the real image of the surrounding area of ​​the observed object, and to image the observed object for the second time, forming a virtual image of the surrounding area of ​​the observed object;

[0010] Eyepiece: Located directly in front of the human eye, it forms a second image of the observed object, forming an enlarged long-distance virtual image in front of the human eye, and a virtual image of the surrounding area of ​​the observed object, forming a real image in front of the peripheral retina of the human eye.

[0011] Further: the imaging optical path of the telephoto imaging optical system with peripheral visual area defocusing includes:

[0012] First optical path: the light emitted by the observed object reaches the objective lens through the flat area of ​​the defocus panel, and then is reflected on the surface of the objective lens and reaches the eyepiece. The light is reflected on the surface of the eyepiece and enters the human eye as divergent light. The reverse extension line of the light forms a distant virtual image of the observed object in front of the human eye.

[0013] Second optical path: light emitted from the peripheral area of ​​the observed object reaches the objective lens through the microlens array of the defocusing panel. The light is reflected on the surface of the objective lens and reaches the eyepiece. The light is reflected on the surface of the eyepiece to converge and enter the human eye.

[0014] Further: the distance between the distant virtual image formed by the light emitted by the observed object and the human eye S The expression is:

[0015]

[0016] in, Represents the radius of curvature of the incident point of the light on the objective lens; Represents the radius of curvature of the light incident point on the eyepiece; Represents the distance from the observed object to the objective lens; Represents the distance between the objective lens and the eyepiece; Represents the distance from the observer's eye to the eyepiece; Represents the angle between the incident ray and the normal at the point of incidence of the ray on the objective lens; Represents the angle between the incident ray and the normal at the point where the ray enters the eyepiece.

[0017] Further: In the vertical direction, the focal length of the microlens at a certain distance from the center of the focal panel in the microlens array area is satisfy:

[0018]

[0019] in, Represents the distance from the plane where the defocus panel is located to the objective lens; Represents the angle between the defocused panel and the horizontal direction; Represents the angle between the objective lens and the horizontal direction; p Represents the center distance between two microlenses in the vertical direction; n represents the number of center-to-center distances between a microlens at a certain position in the defocus area and the most central microlens, which takes a positive integer value above the central microlens and a negative integer value below the central microlens; The physical meaning of is the image distance of the real image formed by the microlens, which satisfies:

[0020]

[0021] in, The physical meaning of is the object distance from the real image formed by the microlens to the objective lens, which satisfies:

[0022]

[0023] in, Represents the image distance formed by the objective lens, which satisfies the relationship:

[0024]

[0025] in, Represents the straight-line distance between the exit point on the objective lens and the corresponding entrance point on the eyepiece; The physical meaning of is the object distance from the image formed by the objective lens to the eyepiece, which satisfies the relationship:

[0026]

[0027] in, represents the angle between the incident ray and the normal at the point of incidence of the ray on the eyepiece; Represents the image distance formed by the objective lens, which satisfies the relationship:

[0028]

[0029] in, Represents the distance from the observer's eye to the eyepiece, is the defocus amount.

[0030] Further: the length of the flat panel area of ​​the defocus panel a and the length of the object being observed A Satisfies the relationship:

[0031]

[0032] The width b of the flat plate area and the width B of the observed object satisfy the relationship:

[0033]

[0034] in, Represents the distance from the observer's eye to the eyepiece.

[0035] Furthermore: in the microlens array area of ​​the defocusing panel, the sum of the semi-apertures of adjacent lenses is less than or equal to the center distance between adjacent lenses.

[0036] The beneficial effects of the present invention are:

[0037] The present application proposes a new structure of a long-distance imaging optical system with peripheral visual zone defocus, and provides the constraint relationship between various parameters of the imaging system, so that the imaging system can better achieve the effect of myopic defocus in the peripheral visual zone and better achieve the purpose of myopia prevention and control. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 Diagram of the architecture of a telephoto optical system with peripheral vision defocus.

[0039] Figure 2 Schematic diagram of the defocused panel.

[0040] Figure 3 Schematic diagram of the constraints between various parameters of a telephoto imaging optical system with defocus in the peripheral visual area. DETAILED DESCRIPTION

[0041] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0042] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, a telephoto optical system with peripheral visual zone defocus is provided, comprising:

[0043] Defocus panel: located directly above the observed object, including the flat panel area and the microlens array area;

[0044] The flat plate area is used to transmit light directly from the object being observed;

[0045] The microlens array area is used to perform the first imaging of the peripheral area of ​​the observed object to form a real image;

[0046] Objective lens: located just above the defocus panel, used to image the observed object for the first time, forming a virtual image of the observed object, and to receive the real image of the surrounding area of ​​the observed object, and to image the observed object for the second time, forming a virtual image of the surrounding area of ​​the observed object;

[0047] Eyepiece: Located directly in front of the human eye, it forms a second image of the observed object, forming an enlarged long-distance virtual image in front of the human eye, and a virtual image of the surrounding area of ​​the observed object, forming a real image in front of the peripheral retina of the human eye.

[0048] Specifically, the imaging optical path of the telephoto imaging optical system with peripheral visual area defocusing includes:

[0049] First optical path: the light emitted by the observed object reaches the objective lens through the flat area of ​​the defocus panel, and then is reflected on the surface of the objective lens and reaches the eyepiece. The light is reflected on the surface of the eyepiece and enters the human eye as divergent light. The reverse extension line of the light forms a distant virtual image of the observed object in front of the human eye.

[0050] Second optical path: light emitted from the peripheral area of ​​the observed object reaches the objective lens through the microlens array of the defocusing panel. The light is reflected on the surface of the objective lens and reaches the eyepiece. The light is reflected on the surface of the eyepiece to converge and enter the human eye.

[0051] The telephoto imaging system allows the observer to see the virtual image of the observed object formed in front of the human eye after the objective lens and the eyepiece have formed two images. At the same time, the human eye can receive the defocused image signal through the edge of the eyepiece, so that the peripheral visual area of ​​the human eye is in a state of myopic defocus, achieving the purpose of myopia prevention and control.

[0052] The distance between the distant virtual image formed by the light emitted by the observed object and the human eye S The expression is:

[0053]

[0054] in, Represents the radius of curvature of the incident point of the light on the objective lens; Represents the radius of curvature of the light incident point on the eyepiece; Represents the distance from the observed object to the objective lens; Represents the distance between the objective lens and the eyepiece; Represents the distance from the observer's eye to the eyepiece; Represents the angle between the incident ray and the normal at the point of incidence of the ray on the objective lens; Represents the angle between the incident ray and the normal at the point where the ray enters the eyepiece.

[0055] like Figure 2 As shown, the length of the flat panel area of ​​the defocused panel a and the length of the object being observed A Satisfies the relationship:

[0056]

[0057] The width b of the flat plate area and the width B of the observed object satisfy the relationship:

[0058]

[0059] in, Represents the distance from the observer's eye to the eyepiece.

[0060] In particular, the multiple microlenses in the microlens array area of ​​the defocus panel are arranged according to a certain rule, which can be a circular arrangement, a honeycomb arrangement or a dense arrangement, and the sum of the semi-apertures of adjacent lenses is not greater than the center distance between adjacent lenses.

[0061] On the side view plane of the imaging system, since the distances between the microlenses at different distances from the center of the focal panel along the short side direction in the microlens array area and the observed object are not equal, the defocus amounts of the images formed at different positions in the retina through different microlenses are also not equal. In order to ensure that the images of the object after passing through the defocus panel microlens array area, the objective lens and the eyepiece will have the same defocus amount, the microlenses at different distances from the center of the focal panel in the microlens array area will have corresponding focal lengths according to the distances between them and the object.

[0062] like Figure 3 As shown, in the vertical direction, the focal length of the microlens at a certain distance from the center of the focal panel in the microlens array area satisfy:

[0063]

[0064] in, Represents the distance from the plane where the defocus panel is located to the objective lens; Represents the angle between the defocused panel and the horizontal direction; Represents the angle between the objective lens and the horizontal direction; p Represents the center distance between two microlenses in the vertical direction; n represents the number of center-to-center distances between a microlens at a certain position in the defocus area and the most central microlens, which takes a positive integer value above the central microlens and a negative integer value below the central microlens; The physical meaning of is the image distance of the real image formed by the microlens, which satisfies:

[0065]

[0066] in, The physical meaning of is the object distance from the real image formed by the microlens to the objective lens, which satisfies:

[0067]

[0068] in, Represents the image distance formed by the objective lens, which satisfies the relationship:

[0069]

[0070] in, Represents the straight-line distance between the exit point on the objective lens and the corresponding entrance point on the eyepiece; The physical meaning of is the object distance from the image formed by the objective lens to the eyepiece, which satisfies the relationship:

[0071]

[0072] in, represents the angle between the incident ray and the normal at the point of incidence of the ray on the eyepiece; Represents the image distance formed by the objective lens, which satisfies the relationship:

[0073]

[0074] in, Represents the distance from the observer's eye to the eyepiece, is the defocus amount.

[0075] In one embodiment of the present invention, the imaging system includes a defocusing panel, an objective lens and an eyepiece.

[0076] The defocus panel is located directly above the object being observed, and is tilted from the horizontal direction. The objective lens is located directly above the defocus panel, and its angle with the horizontal direction is 25.99°. The distance from the objective lens to the defocus panel is 25.99°. 20.4mm, the distance from the objective lens to the object being observed 500.7mm; the distance from the eyepiece directly in front of the human eye The angle of inclination to the horizontal direction is 398.6mm The distance from the eyepiece to the objective lens is 70.96°. The expected length A of the object being observed is 382 mm, and the width B is 261 mm.

[0077] The defocus panel is equal in size to the objective lens and is divided into two areas. The flat panel area is rectangular with a length a of 218.2 mm and a width b of 165.9 mm; the rest is a microlens array area in which microlenses are arranged in a circular shape.

[0078] The objective lens is a square concave reflector with a free-form surface, a length of 410 mm and a width of 280 mm.

[0079] The eyepiece is a trapezoidal concave reflector with a free-form surface, a long side length of 300 mm, a short side length of 242 mm, and a width of 197 mm.

[0080] Compared with the existing technology, the imaging system proposed in this embodiment can magnify the observed object and present it far in front of the human eye, so that the observer can see the distant object without lowering his head, and can put the peripheral retina of the human eye in a myopic defocus state, thereby better achieving the purpose of myopia prevention and control.

[0081] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A telescopic imaging optical system with peripheral visual zone defocusing, characterized in that: include: Defocus panel: located directly above the observed object, including the flat panel area and the microlens array area; The flat plate area is used to transmit light directly from the object being observed; The microlens array area is used to perform the first imaging of the peripheral area of ​​the observed object to form a real image; Objective lens: located just above the defocus panel, used to image the observed object for the first time, forming a virtual image of the observed object, and to receive the real image of the surrounding area of ​​the observed object, and to image the observed object for the second time, forming a virtual image of the surrounding area of ​​the observed object; Eyepiece: Located in front of the human eye, it forms a second image of the observed object, forming an enlarged long-distance virtual image in front of the human eye, and takes over the virtual image of the surrounding area of ​​the observed object to form a real image in front of the peripheral retina of the human eye; The imaging optical path of the telephoto imaging optical system with peripheral visual area defocusing comprises: First optical path: the light emitted by the observed object reaches the objective lens through the flat area of ​​the defocus panel, and then is reflected on the surface of the objective lens and reaches the eyepiece. The light is reflected on the surface of the eyepiece and enters the human eye as divergent light. The reverse extension line of the light forms a distant virtual image of the observed object in front of the human eye. Second optical path: light emitted from the peripheral area of ​​the observed object reaches the objective lens through the microlens array of the defocus panel, and the light is reflected on the surface of the objective lens and reaches the eyepiece, and the light is reflected on the surface of the eyepiece to converge and enter the human eye; In the vertical direction, the focal length of the microlens at a certain distance from the center of the focal panel in the microlens array area satisfy: in, Represents the distance from the plane where the defocus panel is located to the objective lens; Represents the angle between the defocused panel and the horizontal direction; Represents the angle between the objective lens and the horizontal direction; p Represents the center distance between two microlenses in the vertical direction; n represents the number of center-to-center distances between a microlens at a certain position in the defocus area and the most central microlens, which takes a positive integer value above the central microlens and a negative integer value below the central microlens; The physical meaning of is the image distance of the real image formed by the microlens, which satisfies: in, The physical meaning of is the object distance from the real image formed by the microlens to the objective lens, which satisfies: in, Represents the image distance formed by the objective lens, which satisfies the relationship: in, Represents the straight-line distance between the exit point on the objective lens and the corresponding entrance point on the eyepiece; The physical meaning of is the object distance from the image formed by the objective lens to the eyepiece, which satisfies the relationship: in, represents the angle between the incident ray and the normal at the point of incidence of the ray on the eyepiece; Represents the image distance formed by the objective lens, which satisfies the relationship: in, Represents the distance from the observer's eye to the eyepiece, is the defocus amount.

2. The telephoto optical system with peripheral visual zone defocus according to claim 1, characterized in that: The distance between the distant virtual image formed by the light emitted by the observed object and the human eye S The expression is: in, Represents the radius of curvature of the incident point of the light on the objective lens; Represents the radius of curvature of the light incident point on the eyepiece; Represents the distance from the observed object to the objective lens; Represents the distance between the objective lens and the eyepiece; Represents the distance from the observer's eye to the eyepiece; Represents the angle between the incident ray and the normal at the point of incidence of the ray on the objective lens; Represents the angle between the incident ray and the normal at the point where the ray enters the eyepiece.

3. The telephoto optical system with peripheral visual zone defocus according to claim 1, characterized in that: Length of the flat panel area of ​​the defocus panel a and the length of the object being observed A Satisfies the relationship: The width b of the flat plate area and the width B of the observed object satisfy the relationship: in, Represents the distance from the observer's eye to the eyepiece.

4. The telephoto optical system with peripheral visual zone defocus according to claim 1, characterized in that: In the microlens array area of ​​the defocusing panel, the sum of the half-apertures of adjacent lenses is less than or equal to the center distance between adjacent lenses.

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