Imaging medium structure and optical system

Abstract

The utility model provides an imaging medium structure, which comprises a white glass layer, a grating layer, a reflective line light layer and a low reflection layer, and is characterized in that the grating layer, the reflective line light layer and the low reflection layer are sequentially and adjacently arranged on the outer incident plane of the white glass layer along the direction far away from the white glass layer; the grid layer comprises a plurality of grid structures, the grid structures are sequentially arranged at intervals in the length direction of the white glass layer, the section of each grid structure along a first plane where the white glass layer is located is in an inverted trapezoid shape, and the section of each grid structure along a second plane where the white glass layer is located is in a rectangular shape. The utility model further provides an optical system. When environmental stray light passes through the grating film layer, the surface of the reflective light layer has a diffuse reflection effect on light rays, the low-reflection layer has an antireflection effect on the light rays, the light rays are stretched to a certain degree through the multiple grating structures in the grating layer, the effect of resisting the environmental stray light is comprehensively achieved, stray light can be eliminated without additionally arranging a shading device, and the anti-stray-light effect is achieved. And the shape of the whole machine is not influenced.

Description

Technical Field

[0001] This utility model relates to the field of optical imaging equipment, and more specifically, to an imaging medium structure and an optical system. Background Technology

[0002] An optical system is a device primarily used for optical imaging. Its main function is to use special optical design to display images or objects that are originally close to the eye on a screen at a certain distance. It is commonly used in scenarios such as vision protection. For example, some imaging media structures used for student learning can convert images from books, electronic devices, etc., that are close to the eye into images displayed on a screen at a distance (e.g., 2-3 meters). This reduces the strain on the eyes' accommodation and helps prevent myopia.

[0003] Current methods for addressing ambient stray light in imaging media structures typically involve adding a light-shielding structure at the optical imaging location, such as adding a roof-like plastic shell at the optical imaging location, to address the problem of ambient stray light entering the optomechanical system.

[0004] However, adding a shading structure similar to a structural eaves greatly restricts the appearance design, making it impossible to further optimize the appearance components and optical-mechanical structure. Moreover, this design scheme does not significantly help with the imaging problem of the overall optical structure. Utility Model Content

[0005] The purpose of this invention is to provide an optical system that can solve the problem of stray light from the environment, thereby optimizing the overall design of the imaging medium structure.

[0006] The embodiments of this utility model are implemented as follows:

[0007] In a first aspect, embodiments of this application provide an imaging medium structure, including a white glass layer, a grid layer, a reflective layer, and a low-reflection layer. The grid layer, the reflective layer, and the low-reflection layer are sequentially arranged adjacent to each other on the outer incident surface of the white glass layer along a direction away from the white glass layer. The grid layer includes a plurality of spaced-apart grid structures. The cross-section of each grid structure along a first plane formed parallel to the first dimension direction and the thickness direction of the white glass layer is an inverted trapezoid, and the cross-section of each grid structure along a second plane formed parallel to the second dimension direction and the thickness direction of the white glass layer is rectangular.

[0008] In some possible implementations, each of the grid structures has two reflective surfaces, and in any two adjacent grid structures, the two reflective surfaces are arranged opposite to each other.

[0009] In some possible implementations, the distance between the ends of each pair of corresponding reflective surfaces facing the clear glass layer is greater than the distance between the ends of each pair of surfaces moving away from the clear glass layer.

[0010] In some possible implementations, the imaging medium structure further includes a PET layer located between and connected to the grid layer and the clear glass layer.

[0011] In some possible implementations, each of the grid structures has a first predetermined distance between the end facing the white glass layer and the PET layer.

[0012] In some possible implementations, the imaging medium structure further includes a stray light elimination auxiliary structure disposed on the inner incident surface of the white glass layer.

[0013] In some possible implementations, the stray light elimination auxiliary structure includes a light decay plate, a polarizer, and a quarter-glass plate, wherein the light decay plate, the polarizer, and the quarter-glass plate are arranged adjacent to each other in a direction away from the white glass layer.

[0014] In some possible implementations, the viewing distance of the imaging medium structure is determined by parameters of the grating layer, including the height of the grating structure, which increases the viewing distance as the height of the grating structure increases.

[0015] In some possible implementations, the parameters of the grid layer also include the spacing between two adjacent grid structures, whereby the viewing distance decreases as the spacing increases.

[0016] In some possible implementations, the parameters of the grid layer include the transparency of the grid structure, and the viewing distance decreases when the transparency of the grid structure increases.

[0017] In some possible implementations, the parameters of the grid layer include a first preset distance between the grid structure and the PET layer, wherein the viewing distance decreases as the first preset distance increases.

[0018] In some possible implementations, the parameters of the grid layer include the refractive index of the transparent gel-like structure filling the spaces between the grid structures, and the viewing distance increases as the refractive index increases.

[0019] Secondly, this application also provides an optical system including the imaging medium structure in any of the above embodiments.

[0020] In some possible implementations, it also includes:

[0021] A housing, wherein the imaging medium structure is disposed on the side of the housing facing the viewer;

[0022] The display is self-illuminating and is disposed inside the housing;

[0023] A reflector is disposed inside the housing, respectively, relative to the imaging medium structure and the display.

[0024] The beneficial effects of this utility model embodiment are:

[0025] The grid film layer comprises a grid layer, an AG layer (reflective amplification layer), and a LR layer (low-reflection layer). These layers are sequentially arranged adjacent to each other along the side furthest from the clear glass layer. The AG and LR layers provide low-reflection and anti-glare properties. When stray ambient light passes through the grid film layer, the AG layer diffuses the light, while the LR layer reduces reflection (cancels interference). The multiple grid structures within the grid layer stretch the light to a certain extent, collectively contributing to the suppression of stray ambient light. This eliminates stray light without requiring additional shading devices and does not affect the overall design of the device. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of an optical system according to an embodiment of the present invention;

[0028] Figure 2 This is a structural diagram of an imaging medium structure in an optical system according to an embodiment of the present invention;

[0029] Figure 3 This is a structural diagram of a grating film for an optical system according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of one embodiment of the first plane, second plane, and third plane of an optical system grating film according to the present invention.

[0031] Figure 5 This is a schematic diagram of another embodiment of the first plane, second plane, and third plane of an optical system grating film according to an embodiment of the present invention.

[0032] Icons: 1. Housing; 2. Imaging medium structure; 21. White glass layer; 221. Grid structure; 222. Reflective layer; 223. Low-reflection layer; 3. Stray light elimination auxiliary structure; 31. Attenuator; 32. Polarizer; 33. 1 / 4 glass slide; 4. PET layer; 5. OCA adhesive; 6. Display; 7. Reflector. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0038] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] like Figure 1 and Figure 2 As shown, this application embodiment provides an imaging medium structure, including a clear glass layer 21, a grid layer, a reflective layer 222, and a low-reflection layer 223. The grid layer, reflective layer 222, and low-reflection layer 223 are sequentially arranged adjacent to each other on the outer incident surface of the clear glass layer 21 along a direction away from the clear glass layer 21. The grid layer includes a plurality of spaced grid structures 221. Each grid structure 221 has an inverted trapezoidal cross-section along a first plane formed parallel to the first dimension direction and thickness direction of the clear glass layer 21, and a rectangular cross-section along a second plane formed parallel to the second dimension direction and thickness direction of the clear glass layer 21. The clear glass layer 21 is ultra-clear glass, which has high transparency and a visible light transmittance of over 91.5%, allowing light to pass through to the maximum extent and reducing image blurring and brightness loss caused by the absorption and scattering of light by the glass itself.

[0040] After the imaging medium structure is installed in the optical system, the outer incident surface of the white glass layer 21 faces the viewer, i.e., the front side of the white glass layer 21. The grating layer, the reflective light layer 222 (AG layer), and the low-reflection layer 223 (LR layer) are arranged adjacent to each other in a direction away from the white glass layer 21. The reflective light layer 222 and the low-reflection layer 223 serve to reduce reflection and prevent glare. When stray ambient light passes through, the surface of the reflective light layer 222 (AG layer) diffuses the light, while the low-reflection layer 223 (LR layer) reduces reflection (destructive interference). Furthermore, multiple grating structures 221 in the grating layer are arranged at intervals, and the cross-section of each grating structure 221 along the length of the white glass layer 21 is an inverted trapezoid, while the cross-section along the width of the white glass layer 21 is rectangular. In other words, each grating structure 221 has a long, toothed structure. These multiple grating structures 221 stretch the light to a certain extent, thus collectively resisting stray ambient light. Stray light can be eliminated without adding a light-blocking device, and the overall design of the machine will not be affected.

[0041] In a possible embodiment, refer to Figure 4The first dimension direction of the white glass layer 21 can be its length direction, and correspondingly, the second dimension direction of the white glass layer 21 is its width direction. In this case, the multiple grid structures 221 are equally spaced along the length direction of the white glass layer 21, suitable for... Figure 4 Imaging systems of electronic devices where the length dimension is greater than the width dimension (such as telephoto screens), for example, TV sets.

[0042] In a possible embodiment, refer to Figure 5 The first dimension of the clear glass layer 21 can be its width direction, and correspondingly, the second dimension of the clear glass layer 21 is its length direction. In this case, the multiple grid structures 221 are evenly spaced along the width direction of the clear glass layer 21, suitable for... Figure 5 Imaging systems for electronic devices where the length dimension is greater than the width dimension (such as telephoto screens), for example, mobile phones.

[0043] In a possible embodiment, the angle between each grid structure 221 and the third plane formed by its thickness direction and the length and width directions of the white glass layer 21 can be 0 to 90°. Preferably, when the angle is 90 degrees, that is, when the grid structure 221 is perpendicular to the third plane, stray light can be eliminated to the maximum extent.

[0044] In a possible embodiment, each grid structure 221 has two reflective surfaces, and in any two adjacent grid structures 221, the two reflective surfaces are arranged opposite to each other. By arranging the reflective surfaces of any two adjacent grid structures 221 opposite to each other, stray light incident on one reflective surface can be reflected and eliminated by the other reflective surface.

[0045] In some embodiments, in every two corresponding reflective surfaces, the distance between the ends facing the white glass layer 21 is greater than the distance between the ends away from the white glass layer 21. After external stray light undergoes diffuse reflection and anti-reflection sequentially through the low-reflection layer 223 (LR layer) and the reflective light layer 222 (AG layer), the remaining stray light is reflected between the reflective surfaces of two adjacent grid structures 221. The gap through which the stray light can pass gradually increases, which can achieve a certain degree of stretching and play a role in resisting ambient stray light.

[0046] In a possible embodiment, the imaging medium structure further includes a PET layer 4, which is located between and connected to the grid layer and the white glass layer 21. The PET layer 4 is a white, transparent film layer, which may be made of polyethylene terephthalate and has good light transmittance. At the same time, the PET layer 4 is connected to the front side of the white glass layer 21 through OCA adhesive 5, thus connecting the white glass layer 21 and the stray light elimination auxiliary structure 3.

[0047] In a possible embodiment, each grid structure 221 has a first preset distance between its end facing the white glass layer 21 and the PET layer 4. The end of the grid structure 221 facing the white glass layer 21 is the bottom end of the grid structure 221. A gap is left between the bottom end of the grid structure 221 and the top surface of the PET layer 4, so that stray light reflected by the grid structure 221 can re-enter between the grid structures 221 to achieve scattering cancellation, which can effectively eliminate stray light.

[0048] In a possible embodiment, the imaging medium structure further includes a stray light elimination aid structure 3 disposed on the inner incident surface of the white glass layer 21. After the imaging medium structure is mounted in the optical system, the inner incident surface of the white glass layer 21 is the side away from the viewer, i.e., the reverse side of the white glass layer 21. The stray light elimination aid structure 3 is used to assist in eliminating residual stray light.

[0049] In a possible embodiment, the stray light elimination auxiliary structure 3 includes a light attenuator 31, a polarizer 32, and a quarter-glass plate 33, which are arranged adjacent to each other in a direction away from the white glass layer 21. After stray light enters the interior of the housing 1, it is reflected by the mirror 7. The stray light is attenuated by the quarter-glass plate 33, and the stray light emission ratio is reduced by passing through the light attenuator 33 and the polarizer 32.

[0050] In a possible implementation, the viewing distance of the imaging medium structure is determined by parameters of the grating layer, including the height of the grating structure 221. As the height of the grating structure 221 increases, the viewing distance increases. (Reference) Figure 3 By adjusting the height of the grid structure 221, that is, adjusting each grid structure 221 to the same height, the viewing distance can be adjusted accordingly. For example, when the height of the grid structure 221 is increased, an imaging medium structure with a relatively far viewing distance can be provided, and when the height of the grid structure 221 is decreased, an imaging medium structure with a relatively close viewing distance can be provided, thereby obtaining a product that can meet different viewing experiences.

[0051] In some embodiments, the parameters of the grid layer also include the spacing between two adjacent grid structures 221. When the spacing increases, the viewing distance decreases. By adjusting the spacing between any two adjacent grid structures 221, that is, adjusting any two adjacent grid structures 221 to the same spacing, the viewing distance can be adjusted accordingly. For example, when the spacing between the grid structures 221 is increased, an imaging medium structure with a relatively close viewing distance can be provided; when the spacing between the grid structures 221 is decreased, an imaging medium structure with a relatively far viewing distance can be provided, thereby obtaining a product that can meet different viewing experiences.

[0052] In some embodiments, the parameters of the grid layer include the transparency of the grid structure 221. When the transparency of the grid structure 221 increases, the viewing distance decreases. By adjusting the transparency of the grid structure 221, the viewing distance can be adjusted accordingly. For example, increasing the transparency of the grid structure 221 provides an imaging medium structure with a relatively close viewing distance, while decreasing the transparency of the grid structure 221 provides an imaging medium structure with a relatively far viewing distance, thereby obtaining a product that can meet different viewing experiences.

[0053] In some embodiments, the parameters of the grid layer include a first preset distance between the grid structure 221 and the PET layer 4. When the first preset distance increases, the viewing distance decreases. By adjusting the first preset distance between each grid structure 221 and the PET layer 4, that is, adjusting the first preset distance between the bottom of each grid structure 221 and the PET layer 4 to be the same, the viewing distance can be adjusted accordingly. For example, when the first preset distance is increased, an imaging medium structure with a relatively close viewing distance can be provided; when the first preset distance is decreased, an imaging medium structure with a relatively far viewing distance can be provided, thereby obtaining a product that can meet different viewing experiences.

[0054] In some embodiments, the parameters of the grid layer include the refractive index of the transparent gel-like structure filling the spaces between the grid structures 221. An increase in refractive index results in an increase in viewing distance. The gel-like structure filling the spaces between the grid structures 221, such as transparent glue, can increase the stability of the grid structures 221. By adjusting the refractive index of the gel-like structure, the viewing distance can be adjusted accordingly. For example, increasing the refractive index of the gel-like structure provides an imaging medium structure with a relatively far viewing distance, while decreasing the refractive index of the gel-like structure provides an imaging medium structure with a relatively close viewing distance, thereby obtaining a product that can satisfy different viewing experiences.

[0055] In some embodiments, by comprehensively adjusting the parameters of the grid layer, namely by comprehensively adjusting the height of the grid structure 221, the spacing between two adjacent grid structures 221, the transparency of the grid structure 221, the first preset distance, and the refractive index of the gel structure, imaging medium structures with different viewing distances can be obtained, thereby obtaining products that meet different usage needs.

[0056] This application also provides an optical system comprising the imaging medium structure described in any of the above embodiments. In the entire optical system, when ambient stray light passes through the grating film layer, the surface of the reflective layer 222 (AG layer) diffuses the light, the low-reflection layer 223 (LR layer) reduces reflection (cancels interference), and the multiple grating structures 221 in the grating layer stretch the light to a certain extent, collectively providing resistance to ambient stray light. Stray light elimination can be achieved without adding a light-shielding device, and it does not affect the overall design of the device.

[0057] In some embodiments, the optical system further includes a housing 1, a display 6, and a reflector 7. An imaging medium structure is disposed on the side of the housing 1 facing the viewer. The display 6 is self-illuminating and disposed inside the housing 1. The reflector 7 is disposed inside the housing 1, relative to both the imaging medium structure and the display 6. The display 6 may be disposed at the bottom inside the housing 1, the reflector 7 at the rear inside the housing 1, and the imaging medium structure at the front of the housing 1. Light emitted from the display 6 is reflected by the reflector 7 to the imaging medium structure for imaging. The imaging medium structure eliminates stray light, effectively eliminating the influence of stray light on the imaging and improving the imaging effect.

[0058] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An imaging medium structure, characterized by, The system includes a clear glass layer, a grid layer, a reflective layer, and a low-reflection layer. The grid layer, the reflective layer, and the low-reflection layer are sequentially arranged adjacent to each other on the outer incident surface of the clear glass layer along a direction away from the clear glass layer. The grid layer includes multiple spaced grid structures. The cross-section of each grid structure along a first plane formed parallel to the first dimension direction and the thickness direction of the clear glass layer is an inverted trapezoid, and the cross-section of each grid structure along a second plane formed parallel to the second dimension direction and the thickness direction of the clear glass layer is rectangular.

2. The imaging medium structure of claim 1, wherein, Each of the grid structures has two reflective surfaces, and in any two adjacent grid structures, the two reflective surfaces are arranged opposite to each other.

3. The imaging medium structure of claim 2, wherein, In every two corresponding reflective surfaces, the distance between the ends facing the white glass layer is greater than the distance between the ends away from the white glass layer.

4. The imaging medium structure of claim 1, wherein, The imaging medium structure also includes a PET layer, which is located between and connected to the grid layer and the clear glass layer.

5. The imaging medium structure according to claim 4, wherein, Each of the grid structures has a first preset distance between the end facing the white glass layer and the PET layer.

6. The imaging medium structure of claim 1, wherein, The imaging medium structure also includes a stray light elimination auxiliary structure, which is disposed on the inner incident surface of the white glass layer.

7. The imaging medium structure according to claim 6, wherein, The stray light elimination auxiliary structure includes a light decay plate, a polarizer, and a quarter glass plate, which are arranged adjacent to each other in a direction away from the white glass layer.

8. The imaging medium structure of claim 5, wherein, The viewing distance of the imaging medium structure is determined by the parameters of the grid layer, including the height of the grid structure. When the height of the grid structure increases, the viewing distance increases.

9. The imaging medium structure according to claim 8, wherein, The parameters of the grid layer also include the spacing between two adjacent grid structures. When the spacing increases, the viewing distance decreases.

10. The imaging medium structure according to claim 8, wherein, The parameters of the grid layer include the transparency of the grid structure; when the transparency of the grid structure increases, the viewing distance decreases.

11. The imaging medium structure according to claim 8, characterized in that, The parameters of the grid layer include a first preset distance between the grid structure and the PET layer. When the first preset distance increases, the viewing distance decreases.

12. The imaging medium structure of claim 8, wherein, The parameters of the grid layer include the refractive index of the transparent gel-like structure filling the spaces between the grid structures; as the refractive index increases, the viewing distance increases.

13. An optical system characterized by comprising: It includes the imaging medium structure as described in any one of claims 1 to 12.

14. The optical system of claim 13, wherein, Also includes: A housing, wherein the imaging medium structure is disposed on the side of the housing facing the viewer; The display is self-illuminating and is disposed inside the housing; A reflector is disposed inside the housing, respectively, relative to the imaging medium structure and the display.

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