CN114578581A

CN114578581A - Optical imaging device with array type reflecting unit

Info

Publication number: CN114578581A
Application number: CN202210483976.3A
Authority: CN
Inventors: 刘楠; 莫家豪
Original assignee: Beijing Zhongjian Huineng Technology Co ltd
Current assignee: Beijing Zhongjian Huineng Technology Co ltd
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2022-06-03

Abstract

The embodiment of the application provides an optical imaging device with array reflecting unit, this optical imaging device with array reflecting unit includes the frame, is formed with a plurality of fretwork portions that are the array and arrange on the frame, and fretwork portion is enclosed by a plurality of lateral walls that set up on the frame, has the orthogonal relation between two adjacent lateral walls, is provided with the reflector layer on the lateral wall. Compared with the traditional structure that the light-transmitting surface and the reflecting surface of the layer-upon-layer light-transmitting sheet are bonded and laminated, the optical imaging device with the array type reflecting unit in the embodiment of the application is simpler. In addition, the optical imaging device with the array type reflection unit in the embodiment of the application has a wider selection range of materials of the frame, can meet requirements as long as the optical imaging device has certain supporting strength, and can reduce the production cost of the optical imaging device with the array type reflection unit.

Description

Optical imaging device with array type reflecting unit

Technical Field

The present disclosure relates to the field of spatial stereo imaging technology, and more particularly, to an optical imaging device with an array type reflection unit.

Background

The space stereo imaging technology mainly adopts two vertical mirror surfaces to reflect light twice according to the reflection law. The two mutually vertical mirror surfaces are taken as the reflection units, and the array structure formed by orderly arranging the plurality of reflection units on the horizontal plane can reflect the corresponding incident light from the object twice, so that the reflected light is converged and imaged again in the air. The array structure can reflect a point light source, a line light source or a surface light source, and the reflected light is still the point light source, the line light source or the surface light source after being converged in the air, and the array structure can be used as a geometric optical waveguide device to support the air imaging technology to be applied practically due to the special light path reflection effect. In the related art, an optical imaging device having an array type reflection unit for realizing spatial stereoscopic imaging has problems of high production cost and complex structure.

Disclosure of Invention

An object of the embodiments of the present application is to provide an optical imaging device having an array type reflection unit, so as to reduce the production cost of the optical imaging device having the array type reflection unit and simplify the structure of the optical imaging device. The specific technical scheme is as follows:

the embodiment of the application provides an optical imaging device with array reflecting unit, including the frame be formed with a plurality of fretwork portions that are the array and arrange on the frame, fretwork portion is in by setting up a plurality of lateral walls on the frame enclose, have the orthogonal relation between two adjacent lateral walls, be provided with the reflector layer on the lateral wall.

According to the optical imaging device with the array type reflecting units, the optical imaging device comprises a frame, a plurality of hollow parts arranged in an array mode are formed on the frame, an orthogonal relation is formed between two adjacent side walls forming the hollow parts, the side walls are provided with reflecting layers, and the reflecting layers are used for reflecting light rays, so that two adjacent side walls can form one orthogonal reflecting unit (each orthogonal reflecting unit comprises two mutually orthogonal reflecting surfaces). In related art, an optical imaging device having an array-type reflection unit for realizing spatial stereoscopic imaging is generally manufactured by bonding two composite lenses, wherein each composite lens includes a plurality of reflection surfaces parallel to each other, and the two composite lenses are bonded in a manner that the reflection surfaces are orthogonal to each other. Compared with the optical imaging device with the array type reflecting units in the related art, the optical imaging device with the array type reflecting units in the embodiment of the application has a single-layer structure, and is simple in structure and lower in manufacturing cost.

In addition, in the optical imaging device with the array-type reflection unit in the embodiment of the application, the hollow portion may allow light to pass through, that is, after the incident light enters from one side of the optical imaging device with the array-type reflection unit, the incident light is reflected by the orthogonal reflection unit and then exits from the other side of the optical imaging device with the array-type reflection unit through the hollow portion. Therefore, the framework only plays a role of supporting the framework, the framework does not have the requirement of enabling light to penetrate, namely the framework can be made of opaque materials.

In addition, in the optical imaging device with the array type reflection unit in the embodiment of the application, the hollow part in the middle of the frame enables incident light rays to directly irradiate the reflection layer of the frame and be reflected by the reflection layer to be converged again for imaging. The light is emitted from the light source without the problem of propagation in different media, so that the energy loss of the light in the propagation process can be reduced, and the imaging quality is improved.

In addition, the optical imaging device with the array type reflection unit according to the embodiment of the present application may further have the following additional technical features:

according to some embodiments of the present application, the frame includes a main body portion, and the hollow portions formed on the main body portion are rectangular hollow portions, and the rectangular hollow portions are equal in size.

According to some embodiments of the present application, the frame further includes an edge portion located around the main body portion, the hollowed-out portions formed on the edge portion are U-shaped hollowed-out portions, and the U-shaped hollowed-out portions are equal in size.

According to some embodiments of the present application, the area of the U-shaped cutout is 1/2 of the area of the rectangular cutout.

According to some embodiments of the present application, the reflective layer is a reflective film or a metal coating.

According to some embodiments of the application, the frame is made of a transparent material, or the frame is made of an opaque material.

According to some embodiments of the application, a ratio of a height of the frame to a distance between two opposite side walls forming the hollowed-out portion is 1:1 to 3: 1.

According to some embodiments of the present application, in a case where the frame is made of an opaque material, the light incident side and/or the light emitting side of the frame is provided with a light absorbing layer.

According to some embodiments of the application, the frame structure is an integrally formed structure.

According to some embodiments of the application, the distance between two opposite side walls forming the hollowed-out portion is 0.1mm-5 mm.

According to some embodiments of the present application, each of the sidewalls forming the hollowed-out portion has a thickness of 1mm or less.

According to some embodiments of the present application, the plurality of hollowed-out portions are arranged along a first direction and a second direction perpendicular to each other to form an array arrangement; each side wall forming the hollow-out part and the first direction or the second direction are arranged at an included angle of 45 degrees.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and it is also obvious for a person skilled in the art to obtain other embodiments according to the drawings.

FIG. 1 is a schematic diagram of an optical imaging device with an array of reflective elements according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of another angle of the optical imaging device having the array-type reflection unit of FIG. 1;

FIG. 3 is a schematic diagram of the optical path of the orthogonal mirror in the orthogonal reflection unit;

FIG. 4 is a schematic diagram of three-dimensional optical paths of orthogonal mirror surfaces in an orthogonal reflection unit;

FIG. 5 is a schematic diagram of imaging of an orthogonal mirror surface in an orthogonal reflection unit;

FIG. 6 is a schematic diagram of spatial imaging of an orthogonal mirror in an orthogonal mirror unit;

FIG. 7 is a diagram of the relationship between the light spot S and the image S' of the orthogonal reflection unit;

fig. 8 is a schematic diagram of an optical imaging device with an array type reflection unit according to an embodiment of the present application in another embodiment;

fig. 9 is a schematic diagram of an optical imaging device with an array type reflection unit according to an embodiment of the present application in a further embodiment;

fig. 10 is a schematic structural diagram of a mold for producing an optical imaging device with an array-type reflection unit according to an embodiment of the present disclosure;

FIG. 11 is a schematic diagram of another mold for manufacturing an optical imaging device with an array of reflective elements according to an embodiment of the present disclosure;

FIG. 12 is a schematic view of a process for producing a frame using the mold of FIG. 11;

fig. 13 is a schematic view of an optical imaging device having an array type reflection unit of the mold production frame of fig. 11.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of protection of the present application.

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" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "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 specifically identified as an order of performance. It should also be understood 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 convenience 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. This spatially relative term is 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 example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented, such as rotated 90 degrees or at other orientations, and the spatially relative descriptors used herein interpreted accordingly.

The embodiment of the application provides an optical imaging device with an array type reflecting unit, and the optical imaging device with the array type reflecting unit is used for spatial stereo imaging, for example, the optical imaging device can be used for but not limited to application scenes such as conferences, teaching, exhibition, media, urban infrastructure and the like. Specifically, as shown in fig. 1 and fig. 2, the optical imaging device with an array type reflection unit includes a frame 10, a plurality of hollow portions 3 arranged in an array are formed on the frame 10, the hollow portions 3 are surrounded by a plurality of side walls 33 arranged on the frame 10, an orthogonal relationship is formed between two adjacent side walls 33, and a reflection layer 331 is arranged on the side walls 33.

As shown in fig. 1 and 2, the plurality of hollow portions 3 are arranged in an array in the same plane, and based on this, a height direction H of the frame 10 can be defined, wherein the height direction H is perpendicular to the plane formed by the plurality of hollow portions 3. Further, in a plane formed by arranging the plurality of hollow-out portions 3, a dimension of the frame 10 in one direction may be defined as a length of the frame 10, the direction being defined as a length direction L of the frame 10, and a dimension of the frame 10 in another direction may be defined as a width of the frame 10, the another direction being defined as a width direction W of the frame 10, wherein the length direction L and the width direction W are perpendicular to each other. It is understood that the dimension of the frame 10 in the length direction L may be greater than the dimension of the frame 10 in the width direction W, or the dimension of the frame 10 in the length direction L may be equal to the dimension of the frame 10 in the width direction W, in the former case the cross-section of the frame 10 in the height direction H is rectangular, in the latter case the cross-section of the frame 10 in the height direction H is square.

The optical imaging device with the array type reflection unit comprises a frame 10, wherein a plurality of hollow parts 3 arranged in an array are formed on the frame 10, two adjacent side walls 33 forming the hollow parts 3 have an orthogonal relation, the side walls 33 are provided with reflection layers 331, and the reflection layers 331 are used for reflecting light rays, so that two adjacent side walls 33 can form an orthogonal reflection unit 5. As shown by the dotted lines in fig. 1 and 2, each orthogonal reflection unit 5 includes two mutually orthogonal reflection surfaces. In related art, an optical imaging device for realizing spatial stereo imaging is generally manufactured by bonding two composite lenses, wherein each composite lens includes a plurality of parallel reflecting surfaces, and the two composite lenses are bonded in a manner that the reflecting surfaces are orthogonal to each other. Compared with the optical imaging device in the related art, the optical imaging device with the array type reflecting unit in the embodiment of the application has a single-layer structure, and is simple in structure and lower in manufacturing cost.

In addition, in the optical imaging device with the array-type reflection unit in the embodiment of the present application, the hollow portion 3 may allow light to pass through, that is, after the incident light enters from one side of the optical imaging device with the array-type reflection unit, the incident light is reflected by the orthogonal reflection unit 5 and then exits from the other side of the optical imaging device with the array-type reflection unit through the hollow portion 3. Therefore, the frame 10 only plays a role of supporting a framework, the frame 10 itself does not have a requirement for transmitting light, that is, the frame 10 itself can be made of an opaque material, the frame 10 in the embodiment of the present application has a wide material selection range, and the requirement can be met as long as the frame has a certain supporting strength, which is also beneficial to further reducing the production cost of the optical imaging device with the array type reflection unit.

In the optical imaging device with the array-type reflection unit in the embodiment of the present application, the hollow portion 3 in the middle of the frame 10 enables the incident light to directly irradiate the reflection layer 331 of the frame 10, and the incident light is reflected by the reflection layer 331 to be converged and imaged again. The light is emitted from the light source without the problem of propagation in different media, so that the energy loss of the light in the propagation process can be reduced, and the imaging quality is improved.

In order to facilitate understanding of the operation principle of the optical imaging device having the array type reflection unit, as shown in fig. 3, 4, 5 and 6, several cases of imaging using the orthogonal reflection unit 5 are illustrated. As shown in fig. 3, the incident light is reflected twice by the orthogonal reflection unit 5 and then exits in a direction parallel to the incident light, that is, the exiting light, the incident light and the primary reflected light are in the same plane; the reflection path of the light rays at the orthogonal reflection unit 5 is shown in fig. 4. As shown in the top view of the orthogonal reflection unit 5 shown in fig. 5, and as shown in the three-dimensional view of the orthogonal reflection unit 5 shown in fig. 6, when the orthogonal reflection unit 5 is plural and arranged in an array, it is also possible to form an image of a linear light source or a surface light source, the formed image S' has a certain offset with respect to S, and the offset is related to the size of the orthogonal reflection unit 5. This offset actually illustrates that the mirror imaged image has the opposite spatiality to the original image. Each orthogonal reflection unit 5 can be understood as a "pixel point" which presents image information opposite to the original image; for example, when S ' is a complete image, it is assumed that S ' is composed of 4 × 4 pixels, and it is detailed that the information carried by each pixel is actually opposite to the corresponding position of the original image of S, but the whole S ' is complete, as shown in fig. 7. When the light source is a linear light source or a surface light source, and when the size of the orthogonal reflection unit 5 is sufficiently small and sufficiently dense, the deviation is negligible.

According to some embodiments of the present application, as shown in fig. 1 and 2, the frame 10 includes a main body 1, and the hollow portions 3 formed on the main body 1 are rectangular hollow portions 31, and the rectangular hollow portions 31 are equal in size. As shown in fig. 1 and 2, the main body 1 is a portion outlined by a dotted line, the hollow portion 3 of the main body 1 is a rectangular hollow portion 31 (including a square hollow portion 3), two adjacent sidewalls 33 of the rectangular hollow portion 31 can be used for reflecting light, and the size of each rectangular hollow portion 31 is equal, so that each orthogonal reflection unit 5 has the same size, and the imaging capability and the imaging quality of each portion of the optical imaging device having the array reflection unit are kept consistent. In addition, the frame 10 formed by the main body 1 has a simple structure, is easy to process, and is advantageous for reducing the production cost.

According to some embodiments of the present application, as shown in fig. 1 and 2, the frame 10 further includes an edge portion 2 located around the main body portion 1, the hollow portions 3 formed on the edge portion 2 are U-shaped hollow portions 32, and the U-shaped hollow portions 32 are equal in size. In the embodiment of the application, on the basis of the main body portion 1, the frame 10 further includes an edge portion 2 disposed around the main body portion 1, and a reflective layer 331 is also disposed on the side wall 33 of the U-shaped hollow portion 32 of the edge portion 2, so that each edge of the frame 10 is also provided with the orthogonal reflection unit 5, and thus, the number of the orthogonal reflection units 5 is expanded by using the edge of the frame 10, which is beneficial to further improving the imaging capability of the optical imaging device with the array reflection units. In addition, the U-shaped cutouts 32 formed in the edge portion 2 are equal in size, so that the imaging ability and the imaging quality at the positions on the edge portion 2 can be kept uniform.

In some embodiments of the present application, as shown in fig. 8, the area of the U-shaped cutout 32 is 1/2 of the area of the rectangular cutout 31. In some cases, it is necessary to splice a plurality of optical imaging devices in order to obtain an optical imaging product with a larger size, and therefore, the U-shaped hollow portion 32 of a single optical imaging device can be used as a reserved interface for splicing. Taking the case of splicing two optical imaging devices as an example, the corresponding U-shaped hollow portions 32 of the two optical imaging devices may be joined together, so that the two U-shaped hollow portions 32 are combined into one rectangular hollow portion 31, and since the area of the U-shaped hollow portion 32 is 1/2 of the area of the rectangular hollow portion 31, the size of the rectangular hollow portion 31 formed by splicing is exactly equal to the size of the rectangular hollow portion 31 on the main body portion 1.

Specifically, the optical imaging device may be spliced by bonding or welding, which is not limited in this application.

In some embodiments of the present application, as shown in fig. 1 and 2, the reflective layer 331 is a reflective film or a metal coating. In the embodiment, the reflective layer 331 adopts a reflective film or a metal plating layer, which can achieve a better light reflection effect, and meanwhile, the two ways of forming the reflective layer 331 are both low in cost.

Further, the reflective film may be a film structure object composed of a plurality of layers of different substances such as a surface layer (protective film), a reflective layer (functional layer), a base layer (carrier layer), an adhesive layer and a bottom layer (protective layer). The surface layer of the reflective film is generally a resin film with good light transmission and weather resistance, the reflective layer is made of different materials according to different types of reflective films, and comprises tiny glass beads, microprisms and the like, the base layer is mostly a film made of resin organic compounds, the adhesive layer is generally epoxy resin adhesive, and the bottom layer is a protective layer made of thick paper.

Further, the metal plating layer may be a silver plating layer or an aluminum plating layer, since silver and aluminum have high brightness, and thus, silver and aluminum can have high reflectivity by being used as the reflective layer 331.

In some embodiments of the present application, the frame 10 may be made of a transparent material, such as transparent glass, resin, etc. The frame 10 is made of a transparent material, the side wall 33 along the height direction of the frame 10 is provided with the reflecting layer 331, and the side wall 33 on the light incident side of the frame 10 is transparent, so that light rays cannot be reflected, the generation of stray light can be reduced, and the interference on the imaging effect of the optical imaging device with the array type reflecting unit is avoided. In other embodiments of the present disclosure, the frame 10 may be made of an opaque material, such as metal, ceramic, opaque hard plastic, etc., and since the frame 10 itself in the embodiments of the present disclosure mainly plays a role of supporting without light penetration, the frame 10 has a wider space in selecting the material, and only needs to consider the rigidity, strength, cost, etc. of the material itself, so as to meet the requirements of different customers for the differentiation of the optical imaging element. For example, the metal material can improve the strength of the frame 10 and prolong the service life of the optical imaging device having the array-type reflection unit due to its higher strength and good ductility, for example, the metal material with better ductility and lower density, such as aluminum or aluminum alloy, magnesium or magnesium alloy, etc., can be selected. Ceramic materials are also good candidates for the frame 10 material due to their high hardness and stable chemistry. Hard plastics are also a suitable choice due to their light weight, low cost, and stable chemical properties.

In some embodiments of the present application, as shown in fig. 1 and 2, the distance S between the two opposite side walls 33 forming the hollow-out portion 3 is 0.1mm to 5 mm.

In the present embodiment, the distance S between the two opposite sidewalls 33 forming the hollow portion 3 finally determines the distance between the pixel points of the display screen. The smaller the distance S between the two opposite sidewalls 33 is, the larger the number of the reflecting units for imaging is, and the smaller the distance between the reflecting units is, the smaller the distance between the formed pixel points is, and thus, the higher the display quality of the display screen is, the sharper the image is. However, in practical processes, the difficulty and cost of the process limit the distance S between the two opposite sidewalls 33 to be infinitely small.

In some embodiments of the present application, as shown in fig. 1 and 2, the ratio of the height of the frame 10 to the distance S between the two opposite side walls 33 forming the hollow portion 3 is 1:1 to 3: 1.

In the present embodiment, the height h of the frame 10 determines how much the reflective layer 331 can receive the light irradiation. When the height h of the frame 10 is less than the distance S between the two opposite sidewalls 33, the reflective layer 331 can receive less light, and thus reflect less light, resulting in a lower brightness of the image. When the height h of the frame 10 is 1 to 3 times the distance S between the two opposite sidewalls 33, the reflection layer 331 can receive more light, so that more light is reflected, and the brightness of the formed image is higher. When the height h of the frame 10 continues to increase and the ratio of the height h of the frame 10 to the distance S between the two opposite sidewalls 33 is greater than 2.1, although the number of light rays received by the reflective layer 331 is large, the number of reflection times that the light rays pass before exiting is large, and the attenuation is severe, so that the image brightness is highest when the ratio of the height h of the frame 10 to the distance S between the two opposite sidewalls 33 is 1:1 to 3: 1.

In some embodiments of the present application, as shown in fig. 1 and 2, the thickness of each sidewall 33 forming the hollow portion 3 is 1mm or less.

In this embodiment, the thickness of each sidewall 33 determines the size of the pixel point itself when the display screen is imaged, and the smaller the pixel point is, the higher the display quality of the display screen is. Meanwhile, when the thickness of the sidewall 33 is smaller, the distance S between the adjacent reflective layers 331 along the length direction or the width direction of the frame 10 is also smaller, so that the pitch of the pixel points for focusing imaging becomes smaller, and the imaging effect of the optical imaging device having the array type reflective unit is improved. The thickness of the sidewall 33 affects the distance S between the adjacent reflective layers 331 in the length direction or the width direction of the frame 10 to some extent, and thus the thinner the sidewall 33 is, the better. However, this thickness cannot be too small in view of the structural stability of the frame 10 and the level of process. The thickness of the side wall 33 must be such as to ensure both the stability of the structure itself and the attainment of the actual process.

In some embodiments of the present application, as shown in fig. 1 and 2, in the case that the frame 10 is made of an opaque material, the light incident side of the frame 10 is provided with a light absorbing layer 332.

In this embodiment, the light absorbing layer 332 is disposed on the light incident side of the frame 10, and the incident light does not reflect after irradiating the light absorbing layer 332, so that the generation of stray light can be reduced, and the interference on the imaging effect of the optical imaging device with the array type reflection unit can be avoided.

In some embodiments of the present application, as shown in fig. 1 and 2, in the case that the frame 10 is made of an opaque material, the light-emitting side of the frame 10 is provided with a light-absorbing layer 332.

In this embodiment, the light-emitting side of the frame 10 is provided with the light-absorbing layer 332, and the light-absorbing layer 332 does not reflect the external light on one side of the observer, so as to avoid interference of the light-emitting side of the frame 10 on the line of sight of the observer due to reflection of the ambient light.

In some embodiments of the present application, as shown in fig. 1 and 2, the frame 10 is a one-piece structure. In the embodiment, the frame 10 is an integrally formed structure, so that the production process of the optical imaging device with the array type reflection unit can be simplified, and the production efficiency can be improved.

In some embodiments of the present application, as shown in fig. 9, the plurality of hollow-out portions 3 are arranged along a first direction and a second direction perpendicular to each other to form an array arrangement. Herein, the first direction and the second direction may be referred to as a "row direction" and a "column direction", respectively. Each side wall 33 forming the hollow portion 3 is arranged at an included angle of 45 degrees with the first direction or the second direction.

In the present embodiment, each sidewall 33 forming the hollow-out portion 3 is disposed at an angle of 45 ° with respect to the first direction or the second direction, wherein the first direction and the second direction may correspond to the length direction and the width direction of the frame 10, respectively, so that the user can look along the side of the length direction L or the width direction W of the frame 10, and the direction is exactly the direction of the angle bisector of the orthogonal reflection unit 5. The optical imaging device with the frame 10 structure can directly observe the imaging result along the side edge of the length direction L or the width direction W of the frame 10, and is more convenient for a user to observe.

According to some embodiments of the present application, the frame 10 is made of transparent resin, and the manufacturing process may be casting molding. The method specifically comprises the following steps:

the first step is as follows: the first mold 4 corresponding to the unevenness of the frame 10 is prepared as shown in fig. 10.

The second step is that: the material from which the frame 10 is made is heated to a molten state.

The third step: the material of the frame 10 in a molten state is poured into the first mold 4 under a vacuum environment.

The fourth step: and (6) cooling.

The fifth step: the formed frame 10 is separated from the first mold 4, obtaining the frame 10 as shown in fig. 1 and 2.

And a sixth step: a layer of coating is preset on the upper and lower surfaces of the frame 10, then the reflecting layer 331 is arranged on the other surface of the frame 10 in a vacuum coating mode, and after the vacuum coating, the coating on the upper and lower surfaces of the frame 10 is processed, so that the optical imaging device with the array type reflecting unit is obtained.

According to some embodiments of the present application, the frame 10 is made of a metal material, and the manufacturing process thereof may also be punch-formed. The method specifically comprises the following steps:

the first step is as follows: preparing a plurality of stamping needles 51 with the cross section of S multiplied by S according to the given distance S between the opposite side walls of the hollow part 3, wherein the length of the needles is longer than the height h of the frame 10; the punch pins 51 are arranged in an array on a flat plate at intervals according to the thickness dimension of the side wall 33 to form the second mold 5, as shown in fig. 11.

The second step is that: a piece of metal plate material 6 (for example, an aluminum plate) is prepared in advance, and the metal plate material 6 is forcibly pressed onto the second die 5 in a pressing manner, as shown in fig. 12.

The third step: the frame in the middle of the punch needle 51 is removed to obtain the frame 10, as shown in fig. 13.

The fourth step: a layer of coating is arranged on the upper surface and the lower surface of the frame 10 in advance, then the reflecting layer 331 is arranged on the other surface of the frame 10 in a vacuum coating mode, and after the vacuum coating, the coating on the upper surface and the coating on the lower surface are processed, so that the optical imaging device with the array type reflecting unit is obtained.

According to some embodiments of the present application, after the sixth step of the casting method or the stamping method, the method further comprises: when the frame 10 is made of an opaque material, a light absorbing layer 332 is disposed on the light incident side and/or the light emitting side of the frame 10. The light absorbing layer 332 is arranged on the light incident side, so that the generation of stray light can be reduced, and the interference on the imaging effect of the optical imaging device with the array type reflecting unit can be avoided. The light absorbing layer 332 is disposed on the light emitting side, so that the light emitting side of the frame 10 can be prevented from interfering with the line of sight of the observer due to the reflection of the ambient light.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The embodiments of the present application are described in a related manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above description is only for the preferred embodiment of the present application and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application are included in the scope of protection of the present application.

Claims

1. The optical imaging device is characterized by comprising a frame, wherein a plurality of hollow parts which are arranged in an array mode are formed on the frame, the hollow parts are formed by a plurality of side walls arranged on the frame in a surrounding mode, an orthogonal relation exists between every two adjacent side walls, and reflecting layers are arranged on the side walls.

2. The optical imaging device with the array-type reflection unit according to claim 1, wherein the frame comprises a main body portion, the hollow portions formed on the main body portion are rectangular hollow portions, and the rectangular hollow portions are equal in size.

3. The optical imaging device with the array-type reflection unit according to claim 2, wherein the frame further includes an edge portion located around the main body portion, the hollowed-out portions formed on the edge portion are U-shaped hollowed-out portions, and the U-shaped hollowed-out portions are equal in size.

4. The optical imaging device with the array-type reflection unit according to claim 3, wherein the area of the U-shaped hollow is 1/2 times the area of the rectangular hollow.

5. The optical imaging device with the array-type reflection unit according to claim 1, wherein the reflection layer is a reflective film or a metal plating layer.

6. The optical imaging device with the array-type reflection unit according to claim 1, wherein the frame is made of a transparent material, or the frame is made of an opaque material.

7. The optical imaging device with the array-type reflection unit according to claim 6, wherein in case that the frame is made of an opaque material, the light incident side and/or the light exit side of the frame is provided with a light absorbing layer.

8. The optical imaging device with the array reflection unit according to any one of claims 2 to 7, wherein a ratio of a height of the frame to a distance between the two opposite sidewalls forming the hollowed-out portion is 1:1 to 3: 1.

9. The optical imaging device with array reflection unit according to any one of claims 1 to 7, wherein the frame structure is an integrally molded structure.

10. The optical imaging device with the array reflection unit according to any one of claims 1 to 7, wherein a distance between two opposite sidewalls forming the hollowed-out portion is 0.1mm to 5 mm.

11. The optical imaging device with the array reflection unit according to any one of claims 1 to 7, wherein the thickness of each of the sidewalls forming the hollowed-out portion is 1mm or less.

12. The optical imaging device with the array-type reflection unit according to claim 1, wherein the plurality of hollowed-out portions are arranged in a first direction and a second direction perpendicular to each other to form an array-type arrangement; each side wall forming the hollow-out part and the first direction or the second direction are arranged at an included angle of 45 degrees.