CN117406467B - Optical imaging device and device for realizing full azimuth observable - Google Patents
Optical imaging device and device for realizing full azimuth observable Download PDFInfo
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/34—Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers
- G02B30/35—Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers using reflective optical elements in the optical path between the images and the observer
Abstract
The application provides an optical imaging device and device capable of realizing full azimuth observable, and belongs to the technical field of space stereoscopic imaging. The optical imaging device for realizing the full azimuth observable comprises reflecting units which are arranged in an array mode in a concentric circle or a concentric fan shape; the reflecting unit comprises a first reflecting surface and a second reflecting surface; the included angle between the first reflecting surface and the second reflecting surface is a right angle; the angular bisector of the right angle points to the center of the concentric circle or the concentric sector. The optical imaging device realizes the observation of any azimuth angle of 0-360 degrees.
Description
Technical Field
The application relates to the technical field of space stereoscopic imaging, in particular to an optical imaging device and a device for realizing full azimuth observable.
Background
The space stereo imaging technology mainly adopts an orthogonal reflecting surface to reflect light twice according to a reflection law, so that the light is finally converged into a real image visible to naked eyes in the air. An optical imaging device is one of core elements for realizing spatial stereoscopic imaging.
The optical imaging device in the related art is an orthogonal mirror plate, which is exemplified by being horizontally placed, and includes upper and lower reflection arrays, and the upper and lower reflection arrays are orthogonal to each other. When the light source is arranged on one side of the orthogonal reflecting mirror, the light rays emitted by the light source sequentially pass through the upper and lower total reflection and form a real image at the position of the other side of the orthogonal reflecting mirror, which is symmetrical to the light source surface. However, the horizontal observation angle of this imaging method is limited, the optimal observation position is located right in front of the imaging method, and the left and right sides of the optimal observation position are accompanied with the clutter interference of a virtual image on one side, so that the horizontal observation angle (also called azimuth angle) is severely limited. For example, only the afterimage can be observed at positions greater than 30 ° and less than 90 ° to the left/right of the optimal observation position.
Thus, there is a need for an optical imaging device that enables larger angle observability.
Disclosure of Invention
In order to solve the technical problem that the horizontal observation angle of an optical imaging device is limited in the related art, the application provides an optical imaging device capable of realizing full azimuth observable, wherein the optical imaging device comprises reflecting units which are arrayed in a concentric circle or a concentric fan shape;
the reflecting unit comprises a first reflecting surface and a second reflecting surface; the included angle between the first reflecting surface and the second reflecting surface is a right angle;
the angular bisector of the right angle points to the center of the concentric circle or the concentric sector.
Optionally, the dimensions of the reflecting unit further satisfy:；
wherein H is the length of the shared edge of the first reflecting surface and the second reflecting surface; d is the length of the first reflecting surface or the second reflecting surface along the right-angled side.
Optionally, the distance between any two adjacent circumferences in the concentric circles or the distance between any two adjacent circular arcs in the concentric sectors further satisfies:；
wherein n is a serial number of a circumference or an arc along the direction that the radius of the concentric circle or the concentric fan deviates from the circle center; r is R n Is the radius of the nth arc in the direction of deviating from the circle center along the radius of the concentric circle or the concentric fan; is the radius of the Rn+1th arc in the direction of deviating from the circle center along the radius of the concentric circle or the concentric fan; d is the length of the first reflecting surface or the second reflecting surface along the right-angled side.
Optionally, the number X of reflection units on any one circumference of the concentric circles n The following is also satisfied:；
wherein D is the length of the first reflecting surface or the second reflecting surface along the right-angled side; is the radius of the nth arc in the direction of deviating from the center of the circle along the radius of the concentric circle or the concentric sector.
Optionally, the number Y of reflection units of any one of the concentric sectors n The following is also satisfied:the method comprises the steps of carrying out a first treatment on the surface of the Wherein θ is the central angle of the concentric sectors; d is the length of the first reflecting surface or the second reflecting surface along the right-angle side;𝑅 𝑛 is the radius of the nth arc in the direction of deviating from the center of the circle along the radius of the concentric circle or the concentric sector.
Alternatively, the reflection units are continuously arranged along any circumference of the concentric circle or any circular arc of the concentric sector.
Alternatively, the reflecting units are arranged at intervals along any circumference of the concentric circles or any circular arc of the concentric sectors.
Optionally, a side of the reflecting unit facing away from the first reflecting surface does not have a reflecting characteristic; the method comprises the steps of,
the side of the reflecting unit facing away from the second reflecting surface is not provided with reflecting characteristics.
Optionally, an optical medium transparent to the visible light band is filled between the reflecting units.
Optionally, the reflection unit is prepared by a nanoimprint process.
On the other hand, the embodiment of the application also provides an optical imaging device for realizing full azimuth observable, which is characterized in that the optical imaging device comprises a light source and the optical imaging device provided according to any embodiment;
wherein the light source is disposed at one side of the optical imaging device.
The optical imaging device and the device for realizing the full azimuth observable provided by the embodiment of the application have the following beneficial effects:
the embodiment of the application provides an optical imaging device capable of realizing full azimuth observable and a display device comprising the same, the device comprises reflection units which are arrayed in a concentric circle or a concentric fan-shaped form, wherein the reflection units comprise a first reflection surface and a second reflection surface, and an angular bisector of an included angle of the first reflection surface and the second reflection surface points to a circle center of the concentric circle or the concentric sector, thereby, the light field intensity of a real image on one side of any circular arc of the concentric circle or the concentric sector, which faces the circle center, is equivalent, a virtual image which generates interference of a hybrid image is compressed, interference of the virtual image on the real image is avoided, and the horizontal observation angle is flexibly designed according to the observation angle requirement.
Drawings
In order to more clearly describe the technical solutions in the embodiments or the background of the present application, the following description will describe the drawings that are required to be used in the embodiments or the background of the present application.
Fig. 1 (a) and (b) show a perspective view and a top view, respectively, of an alternative imaging element in the related art;
fig. 2 (a) and (b) show schematic diagrams of the imaging element of fig. 1 forming a hetero image, respectively;
FIG. 3 shows an alternative structural schematic of the reflection unit provided in the present application;
FIG. 4 illustrates an alternative structural schematic of the imaging device provided herein;
FIG. 5 shows a schematic diagram of the imaging principle of the optical imaging device provided by the present application;
fig. 6 shows an alternative structural schematic diagram of the optical imaging apparatus provided in the present application.
Reference numerals in the drawings denote:
1-a reflection unit; 11-a first reflective surface; 12-a second reflective surface; 101-real image reflection area; 102-a first virtual image reflection region; 103-a second virtual image reflection region.
Detailed Description
In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the exemplary term "below" may include both upper and lower orientations. The device may be otherwise oriented, such as rotated 90 degrees or in other directions, and the spatial relative relationship descriptors used herein interpreted accordingly.
In the related art, in order to increase the horizontal observation angle of the optical waveguide array imaging, a technical means for splicing lenses is provided. The specific practice is to splice a plurality of lenses, wherein the optical waveguides in each lens are inclined with respect to the splice line, and the optical waveguide arrays in adjacent lenses are symmetrical with respect to the splice line. Therefore, the floating real images formed by each lens can be spliced to form a stereoscopic display effect. However, the splicing method has high requirements on the splicing process, the imaging quality of the spliced three-dimensional real images is difficult to ensure, and the yield is low. Moreover, if the lens adopts an inclined splicing process, the difficulty in splicing precision control is high, and the imaging precision is easy to be reduced; if the conventional horizontal splicing and orthogonal combination are adopted and then oblique cutting is carried out, the size of a single lens is limited, the imaging size is smaller, the display effect is reduced, the process is complex, and great material waste is caused, so that the manufacturing cost is increased greatly. More importantly, the splicing method has high precision requirement, and can not realize 0-360 degrees real image splicing, so that the full azimuth angle can not be observed, and only 0-180 degrees of imaging can be realized.
Further, a dihedral array is provided in the related art. The positive spiral line and the negative spiral line are respectively unfolded clockwise and anticlockwise from the same origin, and two reflecting surfaces facing the origin are respectively arranged at the intersecting positions of the positive spiral line and the negative spiral line along the tangent line of the positive spiral line and the negative spiral line, so that virtual images formed by odd reflections are eliminated. However, due to the curvature of the positive and negative curves, the real image formed by the array is obviously distorted, and even the light field reconstruction cannot be completed. In addition, the lens adopts a splicing process for arranging the block-shaped optical waveguides in an array manner, wherein the block-shaped optical waveguides are formed by cutting strip-shaped optical waveguides, and the processing process is complex. In addition, in the two techniques, the lens shape in the techniques can only be rectangular flat plate due to the limitation of the shape of the optical waveguide unit and the splicing process, which also results in that the horizontal observation angle cannot exceed 180 ° no matter what method is adopted.
In order to overcome the problem that the conventional aerial imaging technology level observation angle is limited to 0 ° to 180 °, the present inventors have tried to propose an optical imaging element as shown in fig. 1. Fig. 1 (a) and (b) show a perspective view and a top view, respectively, of an alternative optical imaging element in the related art. As shown in (a) and (b) of fig. 1, the optical waveguide array in the optical imaging element is arranged such that the reflecting surface forms a rectangular grid. When a three-dimensional light source is employed, the optical imaging element shown in fig. 1 may be implemented to be observable at a particular azimuth angle. Referring to (a) of fig. 1, the light source is disposed below the optical imaging element, and the corresponding real image is formed above the optical imaging element. Referring to fig. 1 (b), fig. 1 (b) shows the viewing position around the optical imaging element. Wherein, the S position observes that the brightness of the real image formed by light field reconstruction is strongest; the interference of the mixed image formed by the virtual image formed by the specular reflection at the A position is strongest.
Fig. 2 shows the imaging principle of the grid-type optical waveguide array shown in fig. 1. As shown in fig. 2 (a), the light emitted from the light source S is reflected twice by the optical waveguide and then converged in the air to form a real image S', and the light emitted from the light source a is reflected only an odd number of times to form a virtual image. Referring to (b) of fig. 2, the observer can observe 3 images, which are real images formed by converging the light rays emitted from the real image reflection region 101 after total reflection, and two virtual images formed by odd-numbered reflections in the optical waveguides of the first and second virtual image reflection regions 102 and 103, respectively, at any one S position. When the observation position is from any S position to the A position adjacent to the S position, the brightness of the real image gradually decreases, the brightness of the virtual image gradually increases, and the disturbance of the mixed image formed by the virtual image also gradually increases. Therefore, the grid-type optical imaging element provided in fig. 1 and 2 has only a specific position (S position) as the best viewing position and a position as the worst viewing position. That is, the optical imaging element can only realize the observation of a specific azimuth angle, but cannot realize the observation of an all azimuth angle of 0 ° to 360 °, and is accompanied by the disturbance of the mixed images of two virtual images at the time of the observation of the optimal position.
The inventors further found that the reason why the above-mentioned technical solution can only be observed at a specific angle ranging from 0 ° to 180 °, or from 0 ° to 360 °, is that, in essence, the minimum imaging unit of the above-mentioned solution adopts a conventional block-shaped optical waveguide or a strip-shaped optical waveguide to perform matrix splicing or spiral splicing. In order to solve the above technical problems, the present application provides an optical imaging device for realizing full azimuth observability, as shown in fig. 3 to 6.
Specifically, as shown in fig. 3 to 5, the optical imaging device provided in the present application includes reflection units 1 arranged in an array in the form of concentric circles or concentric sectors. Wherein the reflection unit 1 comprises a first reflection surface 11 and a second reflection surface 12; the included angle between the first reflecting surface 11 and the second reflecting surface 12 is a right angle; the angular bisector of the right angle is directed to the center of the concentric circle or the concentric sector. It will be appreciated that the angular bisector of the right angle is directed towards the centre of the circle such that the first reflecting surface 11 and the second reflecting surface 12 are directed towards the circumference and/or the sector towards one side of the centre of the circle.
Specifically, as shown in fig. 3, after light is incident from one side of the optical imaging device, it is totally reflected twice by the reflecting unit 1 through the first reflecting surface 11 and the second reflecting surface 12, and exits from the other side of the imaging device. The emergent light rays are converged in the air to form a real image, so that light field reconstruction is realized.
In some alternative embodiments, the reflection units 1 are arranged in an array in the form of concentric sectors. Fig. 4 shows an alternative arc in the concentric sectors. Referring to fig. 4, a plurality of reflection units 1 are arranged along the aforementioned arc. Wherein the first reflecting surface 11 and the second reflecting surface 12 in each reflecting unit 1 are perpendicular to each other, and the angular bisector of the included angle between the first reflecting surface 11 and the second reflecting surface 12 is directed to the center of the arc. Thereby, a real image formed by converging light totally reflected by the reflecting units 1 of the array can be observed at a side of the center of the circle facing away from the reflecting units 1 arranged in concentric sectors.
According to the embodiment of the present application, as shown in fig. 4, since the angular bisectors of the angles of the first reflecting surface 11 and the second reflecting surface 12 in each reflecting unit 1 all point to the center of the circle, the brightness of the real image observed at all azimuth angles is equivalent when the observation is performed within the observation range defined by the opposite vertex angles of the central angle of the sector. Thus, a complete real image can be observed at any azimuth angle within the range defined by the opposite corners of the central angles of the concentric sectors in fig. 4 of the sector. Thereby, the number of concentric sectors around the same center and the size of the central angle of each group of concentric sectors are determined according to specific observation requirements. For example, fig. 4 only shows a single arc in one sector, and if three discontinuous observation areas need to be disposed around the center of a circle, three sectors may be disposed correspondingly according to the positions of the three discontinuous observation areas.
In still other alternative embodiments, the reflection units 1 are arranged in an array in the form of concentric circles. Fig. 5 shows an alternative circumference among the aforementioned concentric circles. Referring to fig. 5, a plurality of reflection units are arranged along the aforementioned circumference. Wherein the first reflecting surface 11 and the second reflecting surface 12 in each reflecting unit 1 are perpendicular to each other, and the angular bisector of the included angle between the first reflecting surface 11 and the second reflecting surface 12 is directed to the center of the circumference. Thereby, a real image formed by converging the light totally reflected by the reflecting units 1 of the array can be observed at any position around the circumference.
According to the embodiment of the present application, as shown in fig. 5, since the angular bisectors of the right angles formed by the first reflecting surface 11 and the second reflecting surface 12 in each reflecting unit 1 all point to the center of the concentric circle, any position around the center of the circle has an equivalent effect in imaging, i.e., each position is an S position. Thus, arranging the reflection units in a concentric circular array achieves that a complete real image can be observed from 0 ° to 360 °.
Further, as shown in fig. 3, the side of the reflection unit 1 facing away from the first reflection surface 11 does not have reflection characteristics, and the side facing away from the second reflection surface 12 does not have reflection characteristics. Thereby, a further compression of the web of virtual images formed by the odd reflected light rays in the optical imaging device is achieved.
Alternatively, in the optical imaging device provided in the present application, the reflection units 1 are arranged continuously along any circumference of concentric circles or any arc of concentric sectors. Alternatively, in the optical imaging device provided by the application, the reflecting units 1 are arranged at intervals along any circumference of a concentric circle or any arc of a concentric sector, and air or other transparent medium in visible light wave bands can be arranged between adjacent reflecting units.
According to an embodiment of the present application, in order to avoid mutual crosstalk of reflection units between adjacent circumferences of concentric circles or adjacent arcs in concentric sectors, a distance between any two adjacent circumferences of concentric circles or a distance between any two adjacent arcs in the concentric sectors further satisfies:
wherein n is a serial number of a circumference or an arc along the direction of the radius of the concentric circle or the concentric sector deviating from the center of the circle (namely, along the radial direction from the center of the circle); r is R n Is the radius of the nth arc in the direction of deviating from the center of the circle along the radius of the concentric circle or the concentric sector; r is R n+1 Is the radius of the (n+1) th arc in the direction of deviating from the center of the circle along the radius of the concentric circle or the concentric sector; d is the length of the first or second reflective surface along the right-angled edge.
And controlling the radius difference between adjacent concentric arcs based on the formulas (1) and (2) to ensure the imaging quality of the optical imaging device. When the radius of the concentric circular arcs meets the formulas (1) and (2), the reflection units in the optical imaging device are ensured to have higher arrangement density, the imaging definition is improved, and the mutual interference of the reflection units on different concentric circular arcs is avoided.
More advantageously, in order to achieve that a complete real image is observable at all azimuth angles, the number X of reflecting units 1 on any one circumference of concentric circles n At least satisfy:
wherein D is the length of the first reflecting surface 11 or the second reflecting surface 12 along the right-angled side; r is R n In the form of concentric circles or sectorsThe radius of the nth arc in the direction of the radius deviating from the circle center.
In order to achieve that a complete real image can be observed within the range defined by the opposite corners of the central angles of the concentric sectors, the number Y of reflection units 1 of any one of the concentric sectors n The following is also satisfied:
wherein θ is the central angle of the concentric sectors; d is the length of the first reflecting surface 11 or the second reflecting surface 12 along the right-angled side; r is R n Is the radius of the nth arc in the direction along the radius of the center circle or the concentric fan shape deviating from the center of the circle.
Without wishing to be bound by any theory, the number of reflecting units on any one concentric arc needs to satisfy formula (3) or (4), which not only ensures that reflecting units on the same arc have higher arrangement density, but also avoids that reflected light rays of different reflecting units on the same arc cannot cross interference. Preferably, the reflecting units are uniformly distributed on the same arc.
Still further, the size of any one of the reflection units 1 in the optical imaging device provided in the embodiment of the present application also satisfies:
wherein H is the length of the common edge of the first reflecting surface 11 and the second reflecting surface 12; d is the length of the first reflecting surface 11 or the second reflecting surface 12 along the right-angled side. The reflection unit having the above-mentioned dimensions can prevent light from escaping without undergoing total reflection twice by the first reflection surface 11 and the second reflection surface 12, and can further reduce primary reflection, thereby further compressing the virtual images accompanying both sides of the real image.
In this context, the horizontal observation azimuth refers to an azimuth in a direction parallel to the light emission plane of the optical imaging device provided in the present application. The common edge of the first reflective surface 11 and the second reflective surface 12 is perpendicular to the light exit surface of the optical imaging device, also referred to as normal or height. That is, H is the height or normal dimension of the reflective element; d is the dimension of the first reflective surface or the second reflective surface in parallel to the light exit plane of the optical imaging device (i.e., the length along the right-angled side).
According to an embodiment of the present application, the reflection unit 1 is optionally prepared using a nanoimprint process. Therefore, the limitation of the block optical waveguide or the strip optical waveguide on the observable angle is broken through, and the limitation of the rectangular lens on the observable angle is also overcome.
According to the embodiment of the application, when the dimension D of the first reflecting surface or the second reflecting surface in the plane parallel to the light emitting surface of the optical imaging device is less than or equal to 550 μm, the reflecting unit of the application can be suitable for a nano-scale processing technology (such as nano-imprinting), and the imaging definition is high. When the above-mentioned dimension D is larger than 550 μm, the imaging effect is similar to that by using the block-or stripe-shaped optical waveguide splicing technique, and the imaging sharpness is rather lowered compared with that when D is smaller than or equal to 550 μm.
On the other hand, the application also provides an optical imaging device for realizing full azimuth observable. The optical imaging device includes an optical imaging device and a light source as provided in any of the embodiments described above.
In some alternative embodiments of the present application, the light source includes a two-dimensional light source and a three-dimensional light source. Wherein a two-dimensional light source may be used to achieve an azimuthal angle observable within 0 ° to 180 °. The three-dimensional light source is used for realizing that the azimuth angle is observable within 0-360 degrees.
In some preferred embodiments, the light source is directed toward the center of a concentric circle or sector in order to achieve an azimuthal angle that is observable within 0 ° to 360 °. I.e. the light source and the centre of a circle are located on the same normal line of the optical imaging device.
In summary, the imaging device for implementing all-azimuth observable provided in the embodiments of the present application is arranged in an array in a concentric circle or a concentric sector, where the first reflecting surface and the second reflecting surface of the reflecting unit are at right angles, and an angular bisector of the right angles points to a center of the concentric circle or the concentric sector. Therefore, virtual images are compressed in a pointing mode through the arrangement of the concentric circles or the concentric sectors and the angular bisectors of the included angles of the first reflecting surface and the second reflecting surface, the observation of any angle between 0 degrees and 360 degrees is achieved, meanwhile, the number and the central angle of the concentric sectors are customized according to the observation angle requirement, free customization of the optical imaging device is achieved, and the design freedom degree is improved.
The foregoing is merely a specific implementation of the embodiments of the present application, but the protection scope of the embodiments of the present application is not limited thereto, and any person skilled in the art may easily think about changes or substitutions within the technical scope of the embodiments of the present application, and all changes and substitutions are included in the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. An optical imaging device for realizing full azimuth observability, characterized in that the optical imaging device comprises reflecting units (1) arranged in an array in the form of concentric circles or concentric sectors;
wherein the reflecting unit (1) comprises a first reflecting surface (11) and a second reflecting surface (12); the included angle between the first reflecting surface (11) and the second reflecting surface (12) is a right angle;
the angular bisector of the right angle points to the center of the concentric circle or the concentric sector;
and, the dimensions of the reflecting unit (1) also satisfy:
and, at the same time,
；
wherein H is the length of the common edge of the first reflecting surface (11) and the second reflecting surface (12); d is the length of the first reflecting surface (11) or the second reflecting surface (12) along the right-angled side.
2. The optical imaging device of claim 1, wherein a spacing between any two adjacent circumferences of the concentric circles or a distance between any two adjacent circular arcs of the concentric sectors further satisfies:
；
；
wherein n is a serial number of a circumference or an arc along the direction that the radius of the concentric circle or the concentric fan deviates from the circle center;is the radius of the nth arc in the direction of deviating from the circle center along the radius of the concentric circle or the concentric fan; />Is the radius of the (n+1) th circular arc in the direction of deviating from the center of the circle along the radius of the concentric circle or the concentric sector.
3. An optical imaging device according to claim 1, characterized in that the number X of reflection units (1) on any one circumference of the concentric circles n The following is also satisfied:
；
wherein D is the length of the first reflecting surface (11) or the second reflecting surface (12) along the right-angled side;is the radius of the nth arc in the direction of deviating from the center of the circle along the radius of the concentric circle or the concentric sector.
4. According to claim 1Is characterized in that the number Y of the reflecting units (1) of any one of the concentric sectors n The following is also satisfied:
;
wherein θ is the central angle of the concentric sectors; d is the length of the first reflecting surface (11) or the second reflecting surface (12) along the right-angled side;is the radius of the nth arc in the direction of deviating from the center of the circle along the radius of the concentric circle or the concentric sector.
5. An optical imaging device according to any of claims 1-4, characterized in that the reflection units (11) are arranged consecutively along any circumference of the concentric circles or any arc of the concentric sectors.
6. An optical imaging device according to any one of claims 1-4, characterized in that the reflecting units (11) are arranged at intervals along any circumference of the concentric circles or any arc of the concentric sectors.
7. Optical imaging device according to any one of claims 1 to 4, characterized in that the side of the reflection unit (1) facing away from the first reflection surface (11) is not provided with reflection properties; the method comprises the steps of,
the side of the reflection unit (1) facing away from the second reflection surface (12) has no reflection characteristic.
8. An optical imaging device according to any of claims 1-4, characterized in that the reflective elements (1) are filled with an optical medium transparent in the visible light band.
9. Optical imaging device according to any of claims 1-4, characterized in that the reflection unit (1) is manufactured using a nanoimprint process.
10. An optical imaging apparatus, characterized in that the optical imaging apparatus comprises a light source and an optical imaging device according to any one of claims 1-9;
wherein the light source is disposed at one side of the optical imaging device.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101641630A (en) * | 2007-03-05 | 2010-02-03 | 独立行政法人情报通信研究机构 | Multiple-viewing-point aerial video display element |
| CN103048868A (en) * | 2013-01-07 | 2013-04-17 | 浙江大学 | True color 360-degree field of vision three-dimensional display device and method based on combined screen |
| CN113655629A (en) * | 2021-08-19 | 2021-11-16 | 安徽省东超科技有限公司 | Dihedral corner reflector array structure for aerial imaging |
| CN114488563A (en) * | 2022-04-15 | 2022-05-13 | 北京中建慧能科技有限公司 | Method for manufacturing optical imaging device with array type reflecting unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101641630A (en) * | 2007-03-05 | 2010-02-03 | 独立行政法人情报通信研究机构 | Multiple-viewing-point aerial video display element |
| CN103048868A (en) * | 2013-01-07 | 2013-04-17 | 浙江大学 | True color 360-degree field of vision three-dimensional display device and method based on combined screen |
| CN113655629A (en) * | 2021-08-19 | 2021-11-16 | 安徽省东超科技有限公司 | Dihedral corner reflector array structure for aerial imaging |
| CN114488563A (en) * | 2022-04-15 | 2022-05-13 | 北京中建慧能科技有限公司 | Method for manufacturing optical imaging device with array type reflecting unit |
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