Light reflecting plate, aerial imaging equipment and aerial imaging method

Abstract

The invention discloses a light reflecting plate, an aerial imaging device and an aerial imaging method.The light reflecting plate comprises a substrate layer, a wafer array, a light-transmitting plate and a wave plate, the wafer array is formed by arranging wafer units of a polyhedral pyramid structure in a gapless array mode, the triangular side face of the wafer array is a light reflecting face, and the included angle between the triangular side face and the regular polygon bottom face is 45 degrees. The aerial imaging equipment comprises the light reflecting plate, a box body with a dust-free cavity, an image source and a polarization beam splitting plate, a V-shaped included angle is formed between the image source and the light reflecting plate, and the polarization beam splitting plate can separate light beams. According to the light reflecting plate, through the polyhedral pyramid structure design of the wafer array, the included angle between the triangular side face and the regular polygon bottom face is 45 degrees, the triangular side face and the regular polygon bottom face are light reflecting faces, light beams can be efficiently reflected, and the imaging definition and stability are improved. According to the aerial imaging method, the aerial virtual image consistent with the outline of the image source can be formed by reasonably controlling emission, reflection and intersection of the light beams, the imaging effect is good, the use experience of an observer is improved, and the aerial imaging method is suitable for various scenes.

Description

Technical Field

[0001] The present invention relates to the field of optical imaging technology, and in particular to a light reflecting plate, an aerial imaging device, and an aerial imaging method. Background Art

[0002] In today's optical imaging field, aerial imaging technology has attracted widespread attention due to its ability to produce images without a carrier. However, existing aerial imaging technologies suffer from issues such as low image clarity, poor stability, complex equipment structure, and high cost.

[0003] For example, some aerial imaging devices rely on complex lens systems to achieve light beam control and imaging. This not only increases the size and weight of the equipment but also easily affects image quality due to errors in lens alignment. Furthermore, existing light reflectors lack efficiency and direction control, resulting in suboptimal imaging and making it difficult to meet the demand for high-quality aerial imaging in various scenarios.

[0004] Publicly disclosed invention patent CN202011292235.4 (Announcement No. CN112201185A) discloses a medium-free aerial imaging system, comprising a refractive imaging assembly and a reflective imaging assembly. The refractive imaging assembly comprises a convex lens, an image source, and a plane mirror. The reflective imaging assembly comprises a concave mirror, an image source, and a beam splitter glass. The image source and the beam splitter glass are both located on the concave side of the concave mirror. The beam splitter glass refracts light generated by the image source and projects it onto the concave surface of the concave mirror. The concave mirror reflects and concentrates the light dispersed by the beam splitter glass, concentrating it at twice the focal length of the concave mirror. The medium-free aerial imaging system proposed by this invention utilizes the basic optical principle of forming an inverted real image using a convex lens or a concave mirror under certain optical conditions. The real image formed in the air is directly visible to the naked eye, as light converges at the human eye. Looking against the light path, the human eye's line of sight traces back to the source.

[0005] The above-mentioned patented medium-free aerial imaging method has the following drawbacks: Structural complexity: Multiple optical components, including convex and concave lenses, plane mirrors, and beam splitters, must be configured simultaneously. High spatial positioning accuracy is required for each component, increasing the size and assembly difficulty of the device. Furthermore, errors in the fit between components can easily lead to imaging deviations. Limited imaging scenarios: The imaging distance is limited due to the fixed imaging position at twice the focal length of the concave mirror, making it difficult to flexibly adjust the imaging distance to suit different usage scenarios. In addition, the focusing characteristics of the concave mirror may cause distortion at the edge of the imaging area. Significant loss of light efficiency: The refraction process of the spectroscopic glass causes some light energy loss. At the same time, multi-interface reflection (plane mirror, concave mirror, spectroscopic glass) reduces the overall light reflection efficiency, affecting the image brightness and clarity. Dual image source design redundancy: The refractive and reflective components are configured with separate image sources, which not only increases system energy consumption but may also introduce imaging interference due to differences in the synchronization of the dual image sources.

[0006] At the same time, existing light reflectors have deficiencies in light beam reflection efficiency and direction control, resulting in suboptimal imaging results and failing to meet the demand for high-quality aerial imaging in various scenarios. Therefore, developing a light reflector with a simple structure and excellent imaging results, as well as aerial imaging equipment and methods using the same, is of great practical significance.

[0007] Therefore, it is of great practical significance to develop a light reflecting plate with a simple structure and good imaging effect, as well as an aerial imaging device and an aerial imaging method using the light reflecting plate. Summary of the Invention

[0008] In view of the deficiencies in the prior art, the present invention aims to provide a light reflecting plate with a simple structure and good imaging effect, as well as an aerial imaging device and an aerial imaging method using the light reflecting plate, so as to improve the user experience of the observer.

[0009] To solve the above technical problems, the present invention is implemented through the following solutions: A light reflecting plate of the present invention includes: a substrate layer, wherein one side of the substrate layer is a plane; A wafer array provided on the plane, wherein the wafer array is arranged in an array of multiple wafer units, and the bottom surfaces of any two adjacent wafer units are connected without gaps, and the wafer unit is a polyhedral pyramid structure, which is surrounded by a regular polygonal base and a plurality of triangular side surfaces with a common vertex, wherein the angle between the triangular side surfaces and the regular polygonal base is 45 degrees, and each triangular side surface is configured as a reflective surface; a light-transmitting plate, covering and connected to the wafer array; The wave plate is arranged on the outer surface of the light-transmitting plate.

[0010] Furthermore, the regular polygonal base includes one of an equilateral triangle, a square and a regular hexagon.

[0011] Furthermore, within a wafer unit, the connection between two adjacent triangular side surfaces is a rounded transition or an angular transition.

[0012] Furthermore, the wave plate is a quarter wave plate.

[0013] An aerial imaging device according to the present invention further comprises: A box body having a dust-free chamber, wherein the light reflecting plate is obliquely installed in the box body; An image source is provided in the housing, wherein the image source and the light reflecting surface of the light reflecting plate are arranged at a V-shaped angle; A polarization beam splitter is provided at the upper end of the box body and is capable of splitting the light beam. The installation positions of the image source, the light reflecting plate and the polarization beam splitter are capable of allowing the image source to develop an image in the space above the polarization beam splitter.

[0014] Furthermore, the polarization beam splitter plate includes: A light-transmitting support plate, the support plate being made of optical glass; A metal film beam splitter layer is provided on the bottom surface of the support plate and faces the clean room, wherein the metal film beam splitter layer is formed by etching a plurality of circular metal strips distributed in a horizontal array on the bottom surface of the support plate; A polarizing layer provided on a surface of the support plate; an anti-reflection layer provided on the upper surface of the polarizing layer, and A transparent layer is provided on the upper surface of the anti-reflection layer.

[0015] Furthermore, the polarization layer is a polarizer that can retain the light vector of linearly polarized light and eliminate the light vector of non-linearly polarized light in the received light beam.

[0016] An aerial imaging method of the present invention comprises the following steps: Step 1: Controlling the image source to be powered on, the image source generates an emission beam, the emission beam including a vertical emission beam and an inclined emission beam; Step 2: The vertically emitted light beam is emitted vertically toward the polarization beam splitter plate, passes through the metal film beam splitter layer, the support plate, the polarization layer, the anti-reflection layer and the anti-transmission layer of the polarization beam splitter plate in sequence, and then emits a pure first linearly polarized light vertically toward the polarization beam splitter plate; Step 3: The oblique emission light beam is directed obliquely toward the polarization beam splitter, and is reflected by the polarization beam splitter to form a symmetrical reflected light beam directed toward the light reflection plate; Step 4: the light reflecting plate reflects the received light beam in parallel back to the polarization beam splitter plate through the wafer array thereon; Step 5: The polarization beam splitter receives the light beam reflected by the wafer array in step 4 as an incident light beam; The incident light beam is split by the metal film beam splitter layer and enters the support plate. During this process, the properties of the split light beam remain unchanged. The polarization layer polarizes the received light beam, eliminates the light vector of the elliptically polarized light, and retains the light vector of the linearly polarized light, and the linearly polarized light is set as the second linearly polarized light; The second linearly polarized light enters the anti-reflection layer through the anti-transmission layer, and the anti-transmission layer eliminates the stray light of the second linearly polarized light through the light absorber inside, leaving the pure second linearly polarized light to be emitted; Step 6: The pure second linearly polarized light and the first linearly polarized light in step 5 intersect in the space above the polarization beam splitter, and a large number of intersection points at different positions form an image source outline to achieve aerial imaging.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The light reflector of the present invention is designed with a polyhedral pyramid structure of a crystal array. The triangular side and the regular polygonal bottom are at a 45-degree angle and are reflective surfaces, which can efficiently reflect light beams and improve the clarity and stability of imaging. 2. The aerial imaging equipment of the present invention adopts the above-mentioned light reflecting plate, combined with the polarization beam splitter structure, so that the overall structure of the equipment is compact, the complex lens group is reduced, and the cost is reduced. At the same time, the design of the dust-free chamber can reduce the impact of the environment on the internal components, ensuring the long-term stable operation of the equipment. 3. The multi-layer structure of the polarization beam splitter of the present invention, including a metal film beam splitter layer, a polarization layer, an anti-reflection layer and an anti-transmission layer, can effectively separate the light beam, eliminate stray light and elliptically polarized light, retain pure linearly polarized light, and further improve imaging quality. 4. The aerial imaging method of the present invention can form an aerial virtual image consistent with the outline of the image source by rationally controlling the emission, reflection and intersection of light beams. It has good imaging effect, improves the observer's user experience, and is applicable to a variety of scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional structural diagram of the light reflection plate of the present invention.

[0019] Figure 2 This is a structural diagram of the light reflection plate of the present invention.

[0020] Figure 3 It is a three-dimensional diagram of the hexahedral pyramid structure of the present invention.

[0021] Figure 4 Schematic diagram of the rounded corners between the triangular side faces in the hexahedral pyramid structure of the present invention.

[0022] Figure 5 Schematic diagram of the distribution of the hexahedral pyramid structure array of the present invention.

[0023] Figure 6 for Figure 5 Magnified view of part A.

[0024] Figure 7 Schematic diagram of the distribution of the regular hexagonal bases in the hexahedral pyramid structure of the present invention.

[0025] Figure 8 Schematic diagram of the distribution of square bases in the tetrahedral pyramid structure of the present invention.

[0026] Figure 9 Schematic diagram of the distribution of the regular-sided bottom surfaces in the trihedral pyramid structure of the present invention.

[0027] Figure 10 The vertical angle and optical path diagram between two adjacent wafer units of the present invention are shown.

[0028] Figure 11 Schematic diagram of the trihedral pyramid structure of the present invention.

[0029] Figure 12 Schematic diagram of the tetrahedral pyramid structure of the present invention.

[0030] Figure 13 It is a stereoscopic diagram of the aerial imaging device of the present invention.

[0031] Figure 14 It is a cross-sectional view of the aerial imaging device of the present invention.

[0032] Figure 15 This is a structural diagram of the polarization beam splitter of the present invention.

[0033] Figure 16 This is a light path diagram of the aerial imaging device of the present invention.

[0034] Figure 17 Schematic diagram of the light beam of the present invention entering the polarization beam splitter after being reflected by the light reflecting plate.

[0035] Figure 18 This is a schematic diagram of the present invention where a light beam passes through a polarization beam splitter to eliminate non-linear polarized light and then emit linearly polarized light.

[0036] Figure 19 This is an example diagram of a spherical aerial image formed by the image source of the present invention above the aerial imaging device.

[0037] Figure 20 This is an example diagram of cloud-like aerial imaging formed by the image source of the present invention above the aerial imaging device.

[0038] Markings in the accompanying drawings: polarization beam splitter 2, box 3, virtual image 4, image source 5, non-linearly polarized light vector 6, second linearly polarized light 7, light reflecting plate 10, wave plate 11, light-transmitting plate 12, crystal unit 13, substrate layer 14, anti-transmission layer 21, anti-reflection layer 22, polarization layer 23, support plate 24, metal film beam splitter layer 25, chamfered transition 131, regular polygonal bottom surface 132. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the scope of protection of the present invention. Obviously, the embodiments described in the present invention are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] Example 1: The specific structure of the present invention is as follows: Please refer to the attached Figure 1-20 The light reflecting plate of the present invention comprises a substrate layer 14, a wafer array, a light-transmitting plate 12, a light-transmitting plate 12 and a wave plate 11. One side of the substrate layer 14 is a plane.

[0042] The wafer array is arranged on the plane. The wafer array is arranged in an array of multiple wafer units 13, and the bottom surfaces of any two adjacent wafer units 13 are connected without gaps. The wafer unit 13 is a polyhedral pyramid structure, which is surrounded by a regular polygonal bottom surface 132 and a number of triangular side surfaces with a common vertex. The angle between the triangular side surface and the regular polygonal bottom surface 132 is 45 degrees, and each triangular side surface is set as a reflective surface. The wafer unit 13 is a micron-sized wafer. Figure 10 As shown, three incident light rays are directed in parallel to a triangular side surface of the crystal unit 13 and form reflected light. Another triangular side surface perpendicular to the triangular side surface receives the reflected light, reflects it again, and emits it in parallel with the incident light. Since the crystal unit 13 is at the micron level, the incident light and the parallel reflected light are almost in the same state, which can improve the clarity of aerial imaging.

[0043] The light-transmitting plate 12 covers and is connected to the wafer array. The light-transmitting plate is a thin plate within 1 mm.

[0044] The wave plate 11 is located on the outer surface of the light-transmitting plate 12. This wave plate 11 is a quarter-wave plate, also called a λ / 4 wave plate, which creates a phase difference of π / 2 (90°) between two perpendicularly vibrating linearly polarized light components. When linearly polarized light is incident at a 45° angle to the wave plate's optical axis, the outgoing light is circularly polarized. When circularly polarized light is incident, the outgoing light is linearly polarized. When the linearly polarized light's vibration direction is at an angle other than 45° to the optical axis, the outgoing light is elliptically polarized.

[0045] The regular polygonal bottom surface 132 includes an equilateral triangle, a square and a regular hexagon. Figure 7-9 As shown, Figure 7 Schematic diagram of the distribution of the regular hexagonal bases in the hexahedral pyramid structure of the present invention. Figure 8 Schematic diagram of the distribution of square bases in the tetrahedral pyramid structure of the present invention. Figure 9 The diagram below shows the distribution of the regular-sided bases in the trihedral pyramid structure of the present invention. The three pyramid structures are designed to connect in a plane without any gaps.

[0046] In a wafer unit 13, the connection between two adjacent triangular side surfaces is a rounded transition 131 or an angular transition. In this embodiment, the rounded transition 131 is preferred. The rounded transition 131 is to avoid irregular reflection and scattering of the light beam when the angular transition occurs. The connection between the angular transition is a sharp intersection of two planes. When light hits the angular transition, complex reflection behavior will occur due to the sudden change in structure: Some light may be reflected from both sides, but due to the "sharp edge effect" of the corners, the reflection direction will change suddenly, forming scattered, non-directional reflected light (i.e. stray light); Additional scattered light may also be generated at corners due to the edge diffraction effect of light. This scattered light will deviate from the normal light path, resulting in ineffective loss of light energy or interfering with the core functions of the optical system.

[0047] The rounded corner transition connects the two side surfaces through a smooth curved surface, so that the reflection direction of light in the transition area changes continuously, avoiding "sudden reflection" at the corners, thereby reducing the generation of stray light and scattered light, and making the reflected light more in line with the designed directional propagation requirements.

[0048] The rounded surface transition allows light to be reflected within a wider range of the surface, and the energy distribution of the reflected light is smoother, which can eliminate the sudden change in light intensity near the corners and make the reflected light field more uniform. Example 2:

[0049] An aerial imaging device according to the present invention comprises: The box body 3 has a dust-free chamber, and the light reflecting plate 10 is obliquely installed in the box body 3; An image source 5 is provided in the housing 3, wherein the image source 5 and the light reflecting surface of the light reflecting plate 10 are arranged at a V-shaped angle; The polarization beam splitter 2 is provided at the upper end of the housing 3 and is capable of splitting the light beam. The image source 5 , the light reflecting plate 10 and the polarization beam splitter 2 are installed in positions that allow the image source 5 to develop an image in the space above the polarization beam splitter 2 .

[0050] The polarization beam splitter plate 2 includes: A light-transmitting support plate 24, which is made of optical glass; A metal film beam splitter layer 25 provided on the bottom surface of the support plate 24 and facing the clean room; A polarizing layer 23 provided on the upper surface of the support plate 24; an anti-reflection layer 22 disposed on the upper surface of the polarizing layer 23, and The anti-transmission layer 21 is provided on the upper surface of the anti-reflection layer 22 .

[0051] The polarization layer 23 is a polarizer that can retain the light vector of the linearly polarized light and eliminate the light vector 6 of the non-linearly polarized light in the received light beam. Example 3:

[0052] An aerial imaging method of the present invention comprises the following steps: Step 1: Controlling the image source 5 to be powered on, the image source 5 generates an emission beam, which includes a vertical emission beam and an inclined emission beam; Step 2: The vertically emitted light beam is emitted vertically toward the polarization beam splitter plate 2, passes through the metal film beam splitter layer 25, the support plate 24, the polarization layer 23, the anti-reflection layer 22, and the anti-transmission layer 21 of the polarization beam splitter plate 2 in sequence, and then emits a pure first linearly polarized light perpendicular to the polarization beam splitter plate 2; Step 3: The oblique emission light beam is directed obliquely toward the polarization beam splitter 2 , and is reflected by the polarization beam splitter 2 to form a symmetrical reflected light beam directed toward the light reflection plate 10 ; Step 4: the light reflecting plate 10 reflects the received light beam in parallel back to the polarization beam splitter plate 2 through the wafer array thereon; Step 5: The polarization beam splitter 2 receives the light beam reflected by the wafer array in step 4 as an incident light beam; The incident light beam is split by the metal film beam splitter layer 25 and enters the support plate 24. During this process, the properties of the split light beam remain unchanged. The polarization layer 23 polarizes the received light beam, eliminates the light vector of the elliptically polarized light, and retains the light vector of the linearly polarized light, which is set as the second linearly polarized light 7; The second linearly polarized light enters the anti-reflection layer 22 into the anti-transmission layer 21. The anti-transmission layer 21 eliminates the stray light of the second linearly polarized light through the light absorber inside, and retains the pure second linearly polarized light for emission; Step six: the pure second linearly polarized light and the first linearly polarized light in step five intersect in the space above the polarization beam splitter 2 , and a large number of intersection points at different positions form an image source outline to achieve aerial imaging. Example 4:

[0053] The invention discloses a light reflecting plate of a regular hexagonal bottom crystal unit and its application.

[0054] In this embodiment, the light reflector 10 has a regular polygonal base 132 of a regular hexagonal cell 13. The side length of the regular hexagon is set to 1-100 microns, and the angle between each triangular side and the regular hexagonal base 132 is precisely controlled to be 45 degrees. The regular hexagonal bases 132 of adjacent cell units 13 are seamlessly connected, forming a tightly packed cell array. During fabrication, a transparent acrylic sheet with a thickness of 0.2-0.5 mm is first selected as the substrate layer 14. One side of the sheet is polished to a flat surface. Then, a regular hexagonal groove array is produced on the surface using photolithography. The depth of the grooves is determined by the height of the wafer unit 13.

[0055] A 50nm-thick aluminum film is deposited on the sides of the grooves (i.e., the triangular sides) through an evaporation process to form a reflective surface. The aluminum film has excellent reflective properties, ensuring efficient light reflection. A 0.2mm-thick quartz glass light-transmitting plate 12 is then placed over the wafer array and bonded to it using optical adhesive. The refractive index of the optical adhesive matches that of the substrate layer 14 and the light-transmitting plate 12 to reduce light reflection losses.

[0056] Finally, a quarter wave plate 11 is attached to the outer surface of the light-transmitting plate 12 , and the optical axis direction of the quarter wave plate 11 forms an angle of 45 degrees with the horizontal direction. The light reflector 10 is used in an aerial imaging device. The interior of the housing 3 is configured as a dust-free chamber, and the light reflector 10 is installed at a 45-degree angle within the housing 3. The image source 5, a high-resolution LED display, forms a V-shaped angle greater than 90 degrees with the light-reflecting surface of the light reflector 10.

[0057] Please refer to the attached Figure 15-18 The polarization beam splitter plate 2 is arranged at the upper end of the box body 3, and the support plate 24 in its structure is an optical glass with a thickness of 1-2 mm. The metal film beam splitter layer 25 is a plurality of circular metal strips etched on the bottom surface of the support plate 24 in a horizontal array. The circular metal strips are nanometer-sized in diameter, with a diameter of 50-100 nm. There is a nanometer-sized gap between two adjacent circular metal strips, and the width of the nanometer-sized gap is 1-3 times the diameter of the circular metal strip. A large number of circular metal strips form a film layer structure. The function of the metal film beam splitter layer 25 is to modulate the scattering, transmission and reflection of light by relying on the periodic structure of the nano-metal strips and the gaps. When light is incident on the surface of the array metal strips, there is a difference between the absorption and reflection of the light by the metal strips and the transmission of the light by the gaps, so that the light is split into multiple beams with specific intensities and directions. The metal strips distributed in the horizontal array respond differently to incident light with different polarization directions. For example, the transmission / reflection efficiency of polarized light parallel to the array direction and that of polarized light perpendicular to the array direction are significantly different. Therefore, polarization splitting can be achieved to separate light with different polarization states.

[0058] The polarizing layer 23 is a polarizing plate, the anti-reflection layer 22 is a MgF2 film, and the anti-transmission layer 21 is a resin layer containing a stray light absorber. Example 5:

[0059] During operation, the image source 5 generates an emission light beam after being powered on, wherein the vertical emission light beam is emitted vertically toward the polarization beam splitter 2, and emits a pure first linear polarized light after passing through each layer of the structure in sequence; the inclined emission light beam is reflected by the polarization beam splitter 2 and then emitted toward the light reflecting plate 10. Since the crystal unit 13 of the light reflecting plate 10 is a regular hexagonal bottom surface 132, the reflective surface of the triangular side surface can receive and reflect the light beam from multiple angles, and the close arrangement characteristics of the regular hexagon make the light beam reception range wider. The reflected light beam returns to the polarization beam splitter 2 in parallel, and forms a second linear polarized light after processing. A large amount of linear polarized light intersects in the space above the polarization beam splitter 2 to form a clear and stable virtual image in the air. The light reflecting plate and equipment of this embodiment are suitable for large exhibition venues and can present large-scale, high-definition aerial images. like Figure 18-19 As shown, Figure 18 This is an example diagram of a spherical aerial image formed by an image source above an aerial imaging device according to the present invention. The image source 5 is a colored spherical structure, and the generated virtual image 4 is a colored sphere. Figure 19 This is an example diagram of cloud-like aerial imaging formed by the image source above the aerial imaging device of the present invention. Figure 19 The virtual image 4 is a colorful cloud-like virtual image.

[0060] In summary, the light reflector of the present invention is designed with a polyhedral pyramid structure of a chip array. The triangular side and the regular polygonal bottom are at a 45-degree angle and are reflective surfaces, which can efficiently reflect light beams and improve imaging clarity and stability. The aerial imaging device of the present invention adopts the above-mentioned light reflecting plate, combined with a polarizing beam splitter plate structure, so that the overall structure of the device is compact, the complex lens group is reduced, and the cost is reduced. At the same time, the dust-free chamber design can reduce the impact of the environment on the internal components, ensuring the long-term stable operation of the equipment. The multi-layer structure of the polarization beam splitter of the present invention, including a metal film beam splitter layer, a polarization layer, an anti-reflection layer and an anti-transmission layer, can effectively separate light beams, eliminate stray light and elliptically polarized light, retain pure linearly polarized light, and further improve imaging quality. The aerial imaging method of the present invention can form an aerial virtual image consistent with the outline of the image source by reasonably controlling the emission, reflection and intersection of light beams. It has good imaging effect, improves the observer's user experience, and is applicable to various scenarios.

[0061] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A light reflecting plate, characterized in that: The light reflecting plate (10) comprises: a substrate layer (14), one surface of the substrate layer (14) being a plane; A wafer array provided on the plane, wherein the wafer array is arranged in an array of a plurality of wafer units (13) and the bottom surfaces of any two adjacent wafer units (13) are connected without a gap, the wafer unit (13) is a polyhedral pyramid structure, which is surrounded by a regular polygonal bottom surface (132) and a plurality of triangular side surfaces having a common vertex, the angle between the triangular side surface and the regular polygonal bottom surface (132) is 45 degrees, and each triangular side surface is set as a reflective surface; A light-transmitting plate (12), covering and connected to the wafer array; The wave plate (11) is arranged on the outer surface of the light-transmitting plate (12).

2. A light reflecting plate according to claim 1, characterized in that: The regular polygonal bottom surface (132) includes an equilateral triangle, a square, and a regular hexagon.

3. The light reflecting plate according to claim 1, wherein: In a wafer unit (13), the connection between two adjacent triangular side surfaces is a rounded transition (131) or an angular transition.

4. The light reflecting plate according to claim 1, wherein: The wave plate (11) is a quarter wave plate.

5. An aerial imaging device, characterized in that: The light reflecting plate (10) comprises the light reflecting plate (10) according to any one of claims 1 to 4.

6. The aerial imaging device according to claim 5, characterized in that: The aerial imaging equipment also includes: A box body (3), the box body (3) having a dust-free chamber, the light reflection plate (10) being obliquely installed in the box body (3); An image source (5) is provided in the box (3), wherein the image source (5) and the light reflecting surface of the light reflecting plate (10) are arranged at a V-shaped angle; A polarization beam splitter (2) is provided at the upper end of the box (3) and is capable of separating light beams. The image source (5), the light reflection plate (10), and the polarization beam splitter (2) are installed in positions that allow the image source (5) to develop an image in the space above the polarization beam splitter (2).

7. The aerial imaging device according to claim 6, characterized in that: The polarization beam splitter plate (2) comprises: A light-transmitting support plate (24) is used as support, wherein the support plate (24) is optical glass; a metal film beam splitter layer (25) provided on the bottom surface of the support plate (24) and facing the dust-free chamber, wherein the metal film beam splitter layer (25) is a plurality of circular metal strips etched on the bottom surface of the support plate (24) and distributed in a horizontal array; a polarizing layer (23) provided on the upper surface of the support plate (24); an anti-reflection layer (22) provided on the upper surface of the polarizing layer (23), and A de-transmission layer (21) is provided on the upper surface of the anti-reflection layer (22).

8. The aerial imaging device according to claim 7, characterized in that: The polarization layer (23) is a polarizer capable of retaining the light vector of linearly polarized light and eliminating the light vector of non-linearly polarized light in a received light beam.

9. An aerial imaging method, characterized in that: The aerial imaging device comprises the aerial imaging device described in any one of claims 6-7.

10. The aerial imaging method according to claim 9, characterized in that: The aerial imaging method comprises the following steps: Step 1: controlling the image source (5) to be powered on, wherein the image source (5) generates an emission light beam, the emission light beam including a vertical emission light beam and an inclined emission light beam; Step 2: the vertical emission light beam is emitted vertically toward the polarization beam splitter (2), passes through the metal film beam splitter layer (25), the support plate (24), the polarization layer (23), the anti-reflection layer (22), and the de-transmission layer (21) of the polarization beam splitter (2), and then emits a pure first linear polarized light vertically toward the polarization beam splitter (2); Step three, the inclined emission light beam is directed obliquely toward the polarization beam splitter (2), and is reflected by the polarization beam splitter (2) to form a symmetrical reflected light beam directed toward the light reflection plate (10); Step 4: the light reflecting plate (10) reflects the received light beam in parallel back to the polarization beam splitter plate (2) through the wafer array thereon; Step 5, the polarization beam splitter (2) receives the light beam reflected by the wafer array in step 4 as an incident light beam; The incident light beam is split by the metal film beam splitter layer (25) and enters the support plate (24). During this process, the properties of the split light beam remain unchanged. The polarization layer (23) polarizes the received light beam, eliminates the light vector of the elliptically polarized light, and retains the light vector of the linearly polarized light, and the linearly polarized light is set as the second linearly polarized light; The second linearly polarized light enters the anti-reflection layer (22) into the anti-transmission layer (21), and the anti-transmission layer (21) eliminates stray light of the second linearly polarized light through the light absorber inside, and retains the pure second linearly polarized light for emission; In step six, the pure second linear polarized light and the first linear polarized light in step five intersect in the space above the polarization beam splitter (2), and a large number of intersection points at different positions form image source contours, thereby realizing aerial imaging.

Images