A multi-path optical imaging device and system based on an orthogonal reflector array

Abstract

The present invention discloses a multi-path optical imaging device and system based on an orthogonal reflector array, belonging to the field of optical technology. The device comprises multiple orthogonal reflector arrays and a substrate for fixing the orthogonal reflector arrays. The orthogonal reflector arrays are composed of two layers of tightly fitted reflector arrays, each including multiple reflectors of identical structural dimensions, equal spacing, and parallel to each other. The reflectors of the two layers of reflector arrays are arranged orthogonally. The planes on which the multiple orthogonal reflector arrays are located are non-parallel and present different angles to each other. Light emitted by an object passing through the device can form equal-sized, upright real images at multiple different locations. The formed images do not require a screen to be received, providing a new method for achieving real-time information sharing and interaction among multiple people.

Description

Technical Field

[0001] The present invention belongs to the field of optical technology, and more specifically, relates to a multi-path optical imaging device and system based on an orthogonal reflector array. Background Art

[0002] With technological advancements, the demand for information sharing and interaction is growing. Information sharing and interaction has evolved from ancient letters to modern electronic display devices such as televisions, and then to highly integrated optoelectronic display devices like wearable virtual reality and augmented reality devices. This has greatly enhanced the capabilities of information sharing and interaction, significantly expanding the ways and experiences of achieving such sharing and interaction. Display technologies based on traditional optical systems, such as optical projection systems composed of concave and convex lenses like projectors, require a receiving screen to form a complete display system. People acquire information by observing scattered light from the receiving screen, which increases the complexity of the display system and reduces the information sharing and interaction experience. Furthermore, lens-based imaging systems suffer from significant aberrations, which degrade image quality.

[0003] To enhance the human-computer interaction experience, air imaging technology has garnered significant attention in recent years and is a key area of ​​development for new display systems. Unlike traditional imaging display technologies, air imaging utilizes an optical projection system to project objects into the air, allowing the viewer to see an image suspended in the air. The earliest so-called air imaging and holographic imaging methods involved projecting luminous objects onto thin films or water droplets suspended in the air, which were difficult for the human eye to see. These methods were not true air imaging, resulting in complex display systems that were not easily miniaturized and limited their application scenarios.

[0004] Recently, a technology for air imaging using a flat plate structure composed of an array of orthogonal mirrors has been proposed. Based on the principle of reflection, this device decomposes the light signal into two light signals with mutually perpendicular incident surfaces. The two layers in the orthogonal parallel plates independently reflect the two light signals, and the light emitted by the luminous object forms real images of equal size and distance after passing through the device. Compared with the projection system using a combination of concave and convex lenses, the projection system designed based on the reflection principle can achieve off-axis imaging of the luminous object with this flat plate structure without the need for any screen reception. Since the parallel plates only contain plane mirrors and parallel plate structures, the aberrations generated during the imaging process are greatly reduced compared to lens-based projection systems, which is conducive to high-resolution imaging. However, the current imaging air devices have a fixed object-image relationship, a small field of view, and can only produce one real image, which is very limited in terms of multi-person information sharing and interaction. Summary of the Invention

[0005] In response to the defects of the existing technology and the need for improvement, the purpose of the present invention is to provide a multi-path optical imaging device and system based on an orthogonal reflector array, aiming to solve the problem that current air imaging devices are difficult to achieve multi-person information sharing and interaction.

[0006] In one aspect, the present invention provides a multi-path optical imaging device based on an orthogonal mirror array, comprising a plurality of orthogonal mirror arrays and a substrate for securing the orthogonal mirror arrays. The orthogonal mirror array structure comprises two layers of tightly fitted mirror arrays, each comprising a plurality of mirrors of identical structural dimensions, equally spaced, and parallel to each other. The mirrors of the two layers of mirror arrays are arranged orthogonally; the planes on which the orthogonal mirror arrays lie are non-parallel and present different angles to each other.

[0007] With a double-layer orthogonal reflector array, light emitted by a luminous object can be decomposed into two optical signals. The incident planes of these two optical signals are parallel to the planes of the two orthogonal reflector arrays. Upon entering the orthogonal reflector array, the first reflector array reflects the signal whose incident plane is perpendicular to the plane of the mirrors, with the reflection angle equal to the incident angle. Similarly, the second reflector array reflects the light whose incident plane is perpendicular to the second reflector array's mirror surface. After passing through the orthogonal reflector array, an equal, upright real image is formed.

[0008] In a multi-path optical imaging device, the planes of the multiple orthogonal mirror arrays are non-parallel. Light emitted by an object passes through the multiple orthogonal mirror array structures to form multiple upright, equal-sized real images. The number of real images is equal to the number of orthogonal mirror arrays. The object and the image center are symmetrical about the plane of the orthogonal mirror array structure.

[0009] Preferably, the height h of the reflector is 100λ-5 mm, where λ is the maximum wavelength of the multi-path optical imaging device based on the orthogonal reflector array.

[0010] Preferably, the spacing d between the reflector arrays is 100λ-5 mm, the reflectors are made of metal, and the material between adjacent reflectors is a material with high transmittance in the visible light band, such as quartz, PDMS or SU8.

[0011] Preferably, the substrate that secures the orthogonal reflector arrays is a multi-faceted flat plate structure. The angles between the multiple planes of the flat plate structure correspond to the angles of the orthogonal reflector arrays. The flat plate structure is preferably made of a material with high transmittance in the visible light band, such as quartz, PDMS, or SU8. Multiple orthogonal reflector array structures are placed on the flat plate structure to secure the relative positions of the multiple orthogonal reflector arrays.

[0012] Preferably, the two layers of reflector arrays are tightly fitted with a spacing of less than 1 mm.

[0013] A second aspect of the present invention provides a multi-path optical imaging system based on an orthogonal reflector array, comprising a light source and a multi-path optical imaging device based on an orthogonal reflector array.

[0014] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects:

[0015] 1. The present invention uses an array of multiple orthogonal reflectors to form an imaging device, which can form images of a single luminous object at multiple different positions without reducing work efficiency. Compared with the existing parallel plate air imaging technology, it increases the field of view and facilitates real-time information interaction among multiple people.

[0016] 2. The present invention adopts a structure of multiple orthogonal reflective mirror arrays to form multiple upright, equal-sized, and equidistant real images of off-axis objects. Compared with the traditional optical projection system composed of concave and convex lenses, the device is small in size, has low processing and assembly tolerance requirements, has no off-axis aberration, and has relatively small chromatic aberration, which is conducive to high-resolution imaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of a multi-channel optical imaging device model based on an orthogonal mirror array;

[0018] Figure 2 Schematic diagram of the principle of single-layer mirror array imaging;

[0019] Figure 3 Schematic diagram of the object-image relationship when a single-layer reflector and the xoy plane have a certain angle;

[0020] Figure 4 Schematic diagram of imaging a point light source with an orthogonal reflector array;

[0021] Figure 5 This is a model diagram of a multi-channel optical imaging system for imaging a luminous object;

[0022] Figure 6 This is a model diagram of the light path tracing of the yoz plane when an orthogonal reflector array is used to image a point light source;

[0023] Figure 7 The optical path tracing result of the orthogonal reflector array imaging the point light source in the yoz plane;

[0024] Figure 8 The optical path tracing result of the orthogonal reflector array imaging the point light source in the xoz plane;

[0025] Figure 9 Diagram of the light path tracing model for imaging a finite area light source with an orthogonal reflector array;

[0026] Figure 10 The light path tracing results of the orthogonal reflector array imaging a finite area light source;

[0027] Figure 11 for Figure 10 Scatter plot of receivers;

[0028] Figure 12 Diagram of the optical path tracing model for an optical imaging device composed of two orthogonal mirror arrays with a dihedral angle of 10 degrees imaging a light source with an area of ​​300mm×300mm;

[0029] Figure 13 The image is taken from an optical imaging device consisting of two orthogonal mirror arrays with a dihedral angle of 10 degrees, imaging a light source with an area of ​​300mm×300mm.

[0030] Figure 14 The scatter plot of an optical imaging device composed of two orthogonal reflector arrays with a dihedral angle of 10 degrees and a light source imaging receiver with an area of ​​300mm×300mm;

[0031] Figure 15 Diagram of the optical path tracing model for a multi-path optical imaging device composed of four orthogonal mirror arrays imaging a light source with an area of ​​300mm×300mm;

[0032] Figure 16 This is a scatter plot of a multi-channel optical imaging device composed of four orthogonal reflector arrays imaging a light source receiver with an area of ​​300mm×300mm;

[0033] Figure 17 A quartz strip processing flow chart for the multi-channel optical imaging device processing technology based on an orthogonal reflector array;

[0034] Figure 18 A process flow chart for a structure supporting a single orthogonal mirror array;

[0035] Figure 19 Flowchart for bonding and assembling components for the fabrication of multi-channel optical imaging devices based on orthogonal mirror arrays;

[0036] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0037] 1-orthogonal mirror array, 1-1 is a multi-channel optical imaging device model based on an orthogonal mirror array, 1-2 is a single orthogonal mirror array; 2-PDMS substrate, 3-mirror array, 4-orthogonal mirror array with a certain angle to the xoy plane, 5-orthogonal mirror array in any plane, 6-light source, 7-multi-channel optical imaging device based on an orthogonal mirror array, 8-multiple real images, 9-simulation model point light source, 10-simulation model orthogonal mirror array, 11-light baffle, 12-receiver, 13-limited area light source, 14-multi-channel optical imaging device based on an orthogonal mirror array in the simulation model, 15-light source in the simulation model, 16-four orthogonal mirror arrays in the multi-channel optical imaging device, 17-light baffle, 18-four receivers parallel to the corresponding image planes. DETAILED DESCRIPTION

[0038] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0039] In the present invention, the terms "first", "second", etc. in the present invention and the accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0040] like Figure 1 As shown, the present invention provides a multi-path optical imaging device based on an orthogonal mirror array, comprising a plurality of orthogonal mirror arrays 1 and a substrate 2 for securing the orthogonal mirror arrays. The orthogonal mirror arrays are composed of two layers of closely fitted mirror arrays 3, the two layers of mirror arrays being perpendicular to each other. The mirror arrays comprise a plurality of parallel mirrors of identical structural dimensions, equally spaced, and arranged in parallel.

[0041] Specifically, if Figure 2 As shown, taking the light emitted by the line light source and incident on the i-th and i+1-th metal reflectors as an example, Figure 2 The centerline light source is infinite along the y direction, the reflectors in the reflector array are infinite along the y direction, and the reflectors are parallel to the yoz plane. The angle between the light emitted by the light source and the z axis is α z,i , α z,i+1 , after the light enters the device, it is refracted. According to Snell's law, the relationship between the refraction angle and the incident angle is:

[0042] n0 sin(α z,i )=n t sin(α zt,i )

[0043] n0 sin(α z,i+1 )=n t sin(α zt,i+1 )

[0044] The incident angle of light incident on the metal reflector is:

[0045] β zt,i =|90°-α zt,i |

[0046] β zt,i+1 =|90°-α zt,i+1 |

[0047] According to the law of reflection, the angle of reflection of light is equal to the angle of incidence, but in the opposite direction:

[0048] β' zt,i =β zt,i

[0049] β' zt,i+1 =β zt,i+1

[0050] The reflected light is emitted from the device, and the angle between the light emitted from the device to the air and the z-axis is:

[0051] γ zt,i =|90°-β' zt,i |

[0052] γ zt,i+1 =|90°-β' zt,i+1 |

[0053] The refraction angle on the air side is:

[0054] n0 sin(γ z,i )=n t sin(γ zt,i )

[0055] n0 sin(γ z,i+1 )=n t sin(γ zt,i+1 )

[0056] Combining the above equations, we get:

[0057] γ z,i+1 =α z,i+1

[0058] γ z,i =α z,i

[0059] That is, the incident angle of the light entering the device is equal to the refraction angle of the light exiting the device. Relative to the propagation distance, the height d of the metal reflector is negligible, and the z coordinates of the two light rays when they reach the reflector are equal. According to the geometric relationship, Figure 2 The triangle ΔABC is congruent with the triangle ΔDEF, and we can further get L o =L i Similarly, for the light incident on other reflectors of the device, the relationship between the exit angle and the incident angle is γ z,1 =α zt,1 ,λ z,2 =α zt,2 ,...,γ z,n =α zt,n The light incident on each metal reflector of the device converges at one point, and the image distance is equal to the object distance.

[0060] With a double-layer orthogonal reflector array, a luminous object is decomposed into two light signals, each incident perpendicular to the plane of the orthogonal reflector array. When light enters the orthogonal reflector array, the first-layer reflector array reflects the light signal whose incident plane is perpendicular to the mirror surface, with the reflection angle equal to the incident angle. Similarly, the second-layer reflector array reflects light whose incident plane is perpendicular to the second-layer reflector array surface. Therefore, the two-layer reflector array can reflect light of any aperture angle, and light emitted by the object forms an equal, upright real image after passing through the orthogonal reflector array.

[0061] Specifically, if Figure 3 Figure 4 shows an orthogonal mirror array, S represents a point light source, S' represents the corresponding image point, and the orthogonal mirror array passes through the origin. The device thickness is very small relative to the object and image distances. Therefore, when analyzing the positional relationship between the object and image, the orthogonal mirror array can be considered a plane. Figure 3 The plane of the orthogonal reflector array shown is at an angle α with plane xoy and 90° with plane xoz. A point light source at coordinates (x, 0, z) is located at a distance L from the orthogonal reflector array. The emitted light forms images of equal size and distance through the device. The line connecting the point light source and the image point is perpendicular to the device bottom surface, so the image point's coordinates are (x + 2Lsinα, 0, z + 2Lcosα).

[0062] If we consider the general situation, such as Figure 4 As shown, the plane equation where the orthogonal reflector array 5 is located is Ax+By+Cz+D=0 (where A 2 +B 2 +C 2 ≠0), the coordinates of the point light source are (x, y, z), and the coordinates of the image point (x1, y1, z1) formed by the orthogonal reflector array can be calculated according to the following formula:

[0063]

[0064]

[0065]

[0066] By varying the ratio of the height and spacing of the orthogonal mirror array, the ratio of the optical power at the designed image plane to the total incident light power is maximized, resulting in the highest device efficiency and the lowest stray light energy. The mirror height, h, is kept as small as possible, provided that processing conditions permit and it is significantly greater than the wavelength (h>100λ), to minimize the effects of spherical aberration on device imaging.

[0067] For a luminous object of a certain size, the object is decomposed into countless incoherent point light sources. After imaging through the device, the object and the image are symmetrical about the plane where the orthogonal reflector array is located.

[0068] Furthermore, for a device composed of a plurality of orthogonal reflector arrays, and the plurality of orthogonal reflector arrays are not parallel to each other, such as Figure 5 The figure shows a multi-path optical imaging device consisting of two orthogonal mirror arrays and a substrate for fixing each orthogonal mirror array. The light emitted by the object 6 will form multiple real images 8 after passing through different orthogonal mirror arrays 7. The number of images is equal to the number of orthogonal mirror arrays. The plane where the object is located and the image plane are symmetrical about the plane where the corresponding orthogonal mirror arrays are located. Therefore, the position of the image can be adjusted by regulating the angle of the orthogonal mirror array, the distance and position of the object and each orthogonal mirror array, so that a single luminous object passes through the device to form multiple equal-sized, upright real images, and devices with different imaging positions and imaging numbers can be designed according to different scenarios.

[0069] The substrate is used to support and fix the orthogonal reflector array. The material is preferably PDMS, and the thickness of the substrate is as small as possible to reduce the spherical aberration and chromatic aberration of the device.

[0070] like Figure 6The figure shows a schematic diagram of a model using lighttools software to construct a single orthogonal reflector array and use a single point source as the light source for ray tracing. In this embodiment, 9 is a point light source with coordinates (-450, -450, 0), 10 is an orthogonal reflector array with center coordinates (0, 300, 1000), and a size of 600mm×600mm×4mm. The reflector array is made of aluminum, with a height of 2mm and a spacing of 1mm. The dielectric materials on both sides of the reflector are alternately PDMS and quartz. 11 is a light baffle placed to block stray light. In the actual manufacturing process, an opaque shell can be used to encapsulate the device to prevent the light emitted by the light source from directly reaching the image plane without passing through the device. 12 is a receiver with coordinates (-450, -450, 2000), that is, it is located at a position symmetrical to the point source about the plane where the orthogonal reflector array 10 is located.

[0071] like Figure 7-8 The figure shows the results of device modeling and ray tracing using simulation software. Light rays from a point source converge on the image plane after passing through the device. The image distance and object distance are equal.

[0072] like Figure 9 The figure shows a ray tracing simulation model of a light source with a certain area incident on an orthogonal reflector array. The light source 13 is a square with a size of 600mm×600mm and a center coordinate of (-450,-450,-1000). The other configurations are the same as Figure 6 The ray tracing results are as follows Figure 10 As shown in FIG, the light emitted by the light source passes through the device and reaches the image plane. Figure 11 for Figure 10 The scatter plot of the receiver in the middle. Each point in the figure represents a ray of light. The light emitted by the light source forms a real image of the same size after passing through the device.

[0073] like Figure 12 As shown in the figure, the model and results of a multi-path optical imaging system composed of a light source with a certain area incident on two orthogonal reflector arrays are shown. The light source area is 300mm×300mm, the center coordinates of the light source are (-450,-450,0), and two receivers are set with an angle of 10 degrees to the plane xoy. The parameters of the two orthogonal reflector arrays are the same as Figure 6 The center coordinates of the orthogonal reflector arrays are (0, 300, 1000) and (0, -1200, 1000), respectively. The angles between the two orthogonal reflector arrays and plane yoz are 0 degrees, and the angles between them and planes xoy and xoz are both 5 degrees. After the light source passes through the device, two images of the same size as the luminous object are formed on the image plane at the same distance from the object, and the two images do not overlap. The light path tracing results and the scatter plot of the receiving surface are shown as follows: Figure 13 and 14As shown, a light source of limited area forms two images of equal size to the light source on the receiving surface after passing through a multi-path optical imaging system composed of two orthogonal reflector arrays.

[0074] like Figure 15 The figure shows a multi-channel optical imaging system composed of a light source and four orthogonal reflector arrays, where the area of ​​the light source 15 is 300mm×300mm, the center coordinates of the light source are (-450,-450,0), the center coordinates of the receiver are (-450,-450,2000), and the four orthogonal reflector arrays 16 have the same structural parameters, with center coordinates of (0,300,1000), (0,-1200,1000), (-900,300,1000), (-900,-1200,1000). The angles between the four orthogonal reflector arrays and the yoz plane and the xoy plane are all 5 degrees. The device is symmetrical on the yoz plane and the xoz plane about the line connecting the center coordinates of the light source and the receiving surface. 17 is the light baffle in the simulation model, and 18 is the four receivers, which are parallel to the planes where the four images are located. The device imaging is simulated using the ray tracing method, and the receiver scatter plot is shown as follows: Figure 16 As shown, after a light source of limited area passes through a multi-path optical imaging system composed of two orthogonal reflector arrays, four separate images of the same size as the light source are formed on the receiving surface. The stray light outside the image surface is small and can be ignored.

[0075] Figure 17-19 The invention relates to a processing method for a multi-path optical imaging device based on an orthogonal reflector array.

[0076] like Figure 17 As shown, a quartz plate is processed into four-sided polished quartz strips of uniform structure and size. The shorter sides of the strips are equal to the height and spacing of the reflectors in the orthogonal reflector array, respectively. The strips are then polished to a surface finish of 40-20, meeting coating requirements and ensuring high device transmittance.

[0077] A high-reflectivity metal film is plated on two parallel sides of a quartz strip. The length of the shorter side is the height of a single-layer reflector array. The metal material is aluminum with a thickness of more than 30nm to achieve a higher reflectivity.

[0078] Process the dielectric structure used to support and fix the metal reflector array. The material of the structure is PDMS with high transmittance and a refractive index close to that of quartz, such as Figure 18As shown, the bottom surface area of ​​the PDMS structure is the bottom surface area of ​​a single orthogonal reflector array and is composed of PDMS cuboids with equal spacing. The PDMS cuboid structures are of the same size and equal spacing, with a width less than or equal to the groove width and a height less than or equal to the height of the reflector array. Specifically, a photolithography and mold remanufacturing method is used. First, a photolithography mask is processed, and then a corresponding SU8 mold is processed using photolithography. The SU8 mold and the desired PDMS structure are complementary structures. PDMS liquid is then poured into the mold, and after curing, the PDMS structure is removed to obtain a PDMS structure that supports a single reflector array.

[0079] Insert the quartz strip coated with metal film on both sides into the groove of the PDMS structure.

[0080] like Figure 19 As shown, quartz plates are installed around the PDMS structure. The height of the quartz plates is equal to the device height to prevent the PDMS liquid from leaking out. The PDMS liquid is applied by drop coating until the entire structure is filled and solidified. Heat can be applied during the curing process to increase the curing rate and shorten the curing time. Specifically, the curing temperature is between 50°C and 150°C.

[0081] Repeat the above processing steps to obtain two parallel mirror arrays, and tightly bond the two devices with PDMS, so that the planes where the mirror surfaces in the mirror arrays of the two devices are located are perpendicular to each other.

[0082] Specifically, a PDMS plate is made using a 3D printing method to fix the relative positions of multiple orthogonal reflectors. The shape and size of the plate depend on the relative positions of the multiple orthogonal reflector arrays. Parallel plates are used to fix the positions of each orthogonal reflector array. Figure 19 Shown in the figure are two orthogonal mirror arrays and corresponding multi-faceted PDMS plates. The orthogonal mirror structure is bonded to the PDMS plate using PDMS, and the PDMS is cured by heating.

[0083] The above-mentioned multi-channel optical imaging device processing technology based on the orthogonal reflector array uses the mold-turning method to process the PDMS structure supporting the orthogonal reflector array and uses the 3D printing method to process the PDMS substrate. Compared with the existing processing technology, the installation accuracy of the quartz strips with double-sided reflective film coating in the orthogonal reflector array is higher, the installation is more convenient, and it is convenient for large-scale processing. It is also beneficial to fix the relative positions of multiple orthogonal reflector arrays, so that the relative positions of multiple images of the luminous object formed by the device are fixed.

[0084] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-path optical imaging device based on an orthogonal mirror array, characterized in that: The invention comprises a plurality of orthogonal reflective mirror arrays and a substrate for fixing the orthogonal reflective mirror arrays; the orthogonal reflective mirror arrays are composed of two layers of closely fitted reflective mirror arrays, the reflective mirror arrays comprising a plurality of reflective mirrors of the same structural size, equal spacing, and parallel to each other, and the reflective mirrors of the two layers of reflective mirror arrays are arranged orthogonally; The planes where the multiple orthogonal reflector arrays are located are not parallel to each other and present different angles to each other; The light emitted by the luminous object is decomposed into two light signals. The incident surfaces of the two light signals are parallel to the planes where the two mutually orthogonal reflector arrays are located. The two light signals pass through multiple orthogonal reflector array structures to form multiple upright and equal-sized real images.

2. The multi-path optical imaging device based on an orthogonal reflector array according to claim 1, characterized in that: The thickness h of the reflector is 100λ~5mm, wherein λ is the maximum wavelength of the multi-path optical imaging device based on the orthogonal reflector array.

3. The multi-path optical imaging device based on an orthogonal reflector array according to claim 1, characterized in that: The distance d between the reflectors is 100λ-5 mm.

4. The multi-path optical imaging device based on an orthogonal reflector array according to claim 2 or 3, characterized in that: The reflector is made of metal.

5. The multi-path optical imaging device based on an orthogonal reflector array according to claim 2, wherein: The material between adjacent reflectors is quartz, PDMS or SU8.

6. The multi-path optical imaging device based on an orthogonal reflector array according to claim 1, characterized in that: The substrate is a multi-faceted flat plate structure, which includes a plurality of parallel flat plates supporting each orthogonal reflector array in the device, and a structure connecting each flat plate.

7. The multi-path optical imaging device based on an orthogonal reflector array according to claim 6, characterized in that: The substrate is made of quartz, PDMS or SU8.

8. A multi-path optical imaging system based on an orthogonal reflector array, comprising a light source and a multi-path optical imaging device, characterized in that: The multi-path optical imaging device comprises the multi-path optical imaging device based on an orthogonal reflector array according to any one of claims 1 to 7.

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