Method for manufacturing aerial image imaging device and aerial image imaging device

Abstract

An aerial image imaging device (10) is manufactured in which inner surfaces of linear grooves (18) of a molded body (21) composed of a transparent resin are covered with a light reflecting material (25), a plurality of linear grooves (18) of a cross-sectional trapezoid shape that are spread toward one side with one side as a vertical surface (16) are arranged in parallel on one side of the molded body (21), a convex stripe (20) of a cross-sectional trapezoid shape having a band-shaped flat portion on the one side is formed between adjacent linear grooves (18), two light control panels (28) in which a surface of the light reflecting material (25) is formed with an antireflection layer (27) are arranged in opposition to each other in a manner that the vertical surfaces (16) of the respective linear grooves (18) are orthogonal to each other in plan view, a surface of the light reflecting material (25) that covers the vertical surface (16) of each linear groove (18) of one light control panel (28) is made a first light reflecting surface (13), and a surface of the light reflecting material (25) that covers the vertical surface (16) of each linear groove (18) of the other light control panel (28) is made a second light reflecting surface (14).

Description

Technical Field

[0001] The present invention relates to a method for manufacturing an aerial image imaging device and an aerial image imaging device in which a plurality of strip-shaped first and second light-reflecting surfaces (mirrors) arranged in parallel at predetermined intervals are orthogonally arranged when viewed from above. Background Technology

[0002] As a device that uses light (scattered light) emitted from the surface of an object (object) to image a three-dimensional image (aerial image = real image) of that object in the air, for example, a three-dimensional image imaging device (optical imaging device) described in Patent Document 1 is known. This imaging device has first and second light control panels inside two transparent plates. The first and second light control panels are formed by arranging light reflecting surfaces, which are perpendicular to one side of the transparent plates and are composed of multiple strip-shaped metal reflective surfaces, at a constant spacing. The imaging device is obtained by orthogonally positioning the light reflecting surfaces of the first and second light control panels so that one side of the first and second light control panels faces each other and is tightly closed.

[0003] However, when manufacturing the light control panel of Patent Document 1, multiple transparent synthetic resin plates or glass plates of a certain thickness with metal reflective surfaces formed on one side are stacked to make a laminate. Since the laminate needs to be cut with a cutting surface perpendicular to each metal reflective surface, the workability and manufacturing efficiency are poor.

[0004] Therefore, in Patent Document 2, a method is proposed to manufacture the first and second light control panels by forming a molded master material with grooves having inclined and vertical cross-sections and protrusions of cross-sections formed by adjacent grooves arranged in parallel on the surface of a transparent sheet by stamping or the like, and selectively forming mirror surfaces only on the vertical surfaces of each groove.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: International Publication No. 2009 / 131128

[0008] Patent Document 2: International Publication No. 2018 / 138940

[0009] Patent Document 3: International Publication No. 2018 / 138932

[0010] Patent Document 4: Japanese Patent Application Publication No. 2021-81451 Summary of the Invention

[0011] The problem that the invention aims to solve

[0012] However, as in Patent Document 2, selectively forming mirrors only on the vertical surfaces of each slot is not simple. Even when sputtering, metal evaporation, spraying metal particles, or irradiating with an ion beam are performed with the inclined surface in shadow along the direction of the inclined surface toward the vertical surface, sometimes a mirror-like metal reflective film (metal coating) is formed on the inclined surface and the small flat areas at the bottom (corners) of the slot, and further on the small flat areas at the top (corners) of the protrusions. Moreover, when a portion of the light emitted from the object and incident on the imaging device is reflected by the metal reflective film formed outside the vertical surface of the slot, it helps to reduce the amount of light for imaging, resulting in a problem of the aerial image becoming dark and less sharp. Furthermore, when an observer observes the aerial image, a portion of the light (sunlight, indoor lighting, etc.) incident on the imaging device from the light-emitting side of the imaging device is scattered or reflected by the metal reflective film formed outside the vertical surface of the slot, resulting in a problem of the aerial image becoming white, and reduced sharpness and visibility. In contrast, Patent Document 3 proposes a method to remove the metal coating formed on the inclined surface by irradiating the inclined surface with a laser after forming the metal coating on the vertical and inclined surfaces of the groove. Moreover, Patent Document 4 proposes a method to remove unwanted metal (metal coating) from the tiny planar portion attached to the top of the protrusion by peeling, grinding, or dissolving.

[0013] However, in Patent Document 3, the metal coating is formed on the inclined surface with the premise of removal, resulting in more material waste, more complex manufacturing process, and increased manufacturing cost, which poses a problem of lack of mass production capability. Moreover, in Patent Document 4, the area of ​​the micro-planar part is small, so the effort of removing the metal is not required, but the improvement effect on the sharpness of the aerial image is less, which may lead to increased costs. Furthermore, as in Patent Documents 2-4, when a light-reflecting surface (mirror) is formed by using the vertical surface of the groove with a triangular cross-section, the groove is left. Due to the difference in refractive index between the air inside the groove (space) and the refractive index of the transparent resin that becomes the substrate of the light control panel, light scattering, light refraction, and light splitting occur at the interface (=boundary, mainly the inclined surface of the groove) between the air inside the groove and the transparent resin, thereby hindering the imaging of the aerial image. Therefore, in Patent Documents 2 to 4, after the light-reflecting surface is formed on the vertical surface of the groove, it is necessary to fill the inside of the groove with a transparent resin having the same refractive index as the transparent resin that serves as the substrate of the light control panel. This increases the manufacturing process and thus reduces the mass production capability.

[0014] The present invention was made in view of the above circumstances, and its object is to provide a method for manufacturing an aerial image imaging device and an aerial image imaging device that has a simple manufacturing process, excellent mass production capability, low manufacturing cost, and can obtain a clear aerial image.

[0015] Methods for solving problems

[0016] In the manufacturing method of the aerial image imaging device of the first invention according to the stated object, the aerial image imaging device is formed as a flat plate having an incident light surface and an exit light surface arranged in parallel. The aerial image imaging device has a plurality of first light reflecting surfaces arranged parallel to the incident light surface at right angles and at predetermined intervals, and a plurality of second light reflecting surfaces arranged parallel to the exit light surface at right angles and at predetermined intervals. The first light reflecting surfaces and the second light reflecting surfaces are orthogonally arranged when viewed from above. The manufacturing method of the aerial image imaging device includes the following steps: A first step, by passing a transparent tree... A plate-shaped molded body is formed by resin molding. On one side of the molded body, (a) a plurality of first straight grooves with triangular or trapezoidal cross-sections, each opening outwards from one side as a vertical surface and the other side as an inclined surface, are arranged in parallel at predetermined intervals; (b) a first protrusion with a trapezoidal cross-section and a first strip-shaped planar portion on one side is formed between adjacent first straight grooves. On the other side of the molded body, (c) a plurality of second straight grooves with triangular or trapezoidal cross-sections, each opening outwards from one side as a vertical surface and the other side as an inclined surface, are formed. The grooves are arranged in parallel at a predetermined interval. (d) A second convex strip with a trapezoidal cross-section having a second strip-shaped planar portion on the other side is formed between adjacent second straight grooves. The vertical surfaces of each first straight groove and each second straight groove are orthogonally arranged when viewed from above. A second step involves covering at least the vertical surfaces and inclined surfaces of the inner surfaces of each first straight groove and each second straight groove of the molded body with a light-reflecting material, thereby manufacturing an intermediate body. A third step involves overlapping the first straight grooves when viewed from one side of the intermediate body. A first anti-reflective layer is formed covering the first light-reflecting material in a region, and a second anti-reflective layer is formed covering the second light-reflecting material in a region that overlaps with each of the second straight grooves when viewed from the other side of the intermediate body, thereby manufacturing an aerial image imaging device. The aerial image imaging device uses the surface of the vertical side of the first light-reflecting material covering the vertical surface of each of the first straight grooves as the first light-reflecting surface, and uses the surface of the vertical side of the second light-reflecting material covering the vertical surface of each of the second straight grooves as the second light-reflecting surface.

[0017] Here, the aerial image includes a top-view image (two-dimensional image) and a stereoscopic image (three-dimensional image). If the object is an image displayed on an image display unit such as a monitor, the top-view image (two-dimensional image) that is its real image is imaged as an aerial image. If the object is a stereoscopic object, the stereoscopic image (three-dimensional image) that is its real image is imaged as an aerial image (the same applies to the second to fourth inventions).

[0018] In the manufacturing method of the aerial image imaging device of the first invention, in the second step, the first light-reflecting material and the second light-reflecting material are filled inside each of the first straight grooves and each of the second straight grooves of the molded body, thereby covering the inner surface of each of the first straight grooves and each of the second straight grooves, including the vertical surface and the inclined surface, with the first light-reflecting material and the second light-reflecting material. In the third step, the first anti-reflective layer and the second anti-reflective layer are formed on the surface of the first light-reflecting material filled in each of the first straight grooves on one side and on the surface of the second light-reflecting material filled in each of the second straight grooves on the other side.

[0019] In the manufacturing method of the aerial imaging device of the first invention, preferably, in the second step, after forming a peelable first cover layer and a second cover layer on the surface of at least each of the first strip-shaped planar portions and each of the second strip-shaped planar portions of the molded body, the vertical surface and the inclined surface of at least each of the first straight grooves and each of the second straight grooves are covered with the first light-reflecting material and the second light-reflecting material, thereby manufacturing the intermediate body; in the third step, the at least each of the first straight grooves covering the intermediate body... After the first light-reflecting material and the second light-reflecting material on the inner surface of each of the second straight grooves are covered by the first anti-reflective material and the second anti-reflective material, the first covering layer and the second covering layer formed on each of the first strip planar portions and each of the second strip planar portions, as well as the unwanted first light-reflecting material, the second light-reflecting material and the unwanted first anti-reflective material and the second anti-reflective material attached to each of the first covering layer and each of the second covering layer, are removed, thereby forming the first anti-reflective layer and the second anti-reflective layer.

[0020] In the manufacturing method of the aerial imaging device of the first invention, in the third step, a non-transparent first cover material covering each of the first straight grooves and each of the first strip-shaped planar portions is disposed on one side of the intermediate body, and a non-transparent second cover material covering each of the second straight grooves and each of the second strip-shaped planar portions is disposed on the other side. The areas of the first cover material overlapping with each of the first strip-shaped planar portions and the areas of the second cover material overlapping with each of the second strip-shaped planar portions are pressurized to join with each of the first strip-shaped planar portions and each of the second strip-shaped planar portions, thereby making them transparent. Thus, the first anti-reflective layer and the second anti-reflective layer are formed in the areas of the first cover material overlapping with each of the first straight grooves and the areas of the second cover material overlapping with each of the second straight grooves, respectively.

[0021] In the manufacturing method of the aerial imaging device of the first invention, preferably, before the third step, in the second step, after forming a peelable first cover layer and a second cover layer on the surface of at least each of the first strip-shaped planar portions and each of the second strip-shaped planar portions of the molded body, and after the vertical surface and the inclined surface of at least each of the first straight grooves and each of the second straight grooves are covered by the first light-reflecting material and the second light-reflecting material, the first cover layer and the second cover layer formed on each of the first strip-shaped planar portions and each of the second strip-shaped planar portions, and the unwanted first light-reflecting material and second light-reflecting material attached to each of the first cover layer and each of the second cover layer, the intermediate body is manufactured.

[0022] In the manufacturing method of the aerial image imaging device of the second invention according to the stated object, the aerial image imaging device is formed as a flat plate having a light-incident surface and a light-exit surface arranged in parallel. The aerial image imaging device has a plurality of first light-reflecting surfaces arranged in parallel at a predetermined interval and perpendicular to the light-incident surface, and a plurality of second light-reflecting surfaces arranged in parallel at a predetermined interval and perpendicular to the light-exit surface. The first light-reflecting surfaces and the second light-reflecting surfaces are orthogonally arranged when viewed from above. The manufacturing method of the aerial image imaging device includes the following steps: a first step, manufacturing a plate-shaped molded body by molding transparent resin, wherein on one side of the molded body, (a) a plurality of straight grooves with a cross-section of triangle or trapezoidal shape that expand outward to one side with one side as a vertical surface and the other side as an inclined surface are arranged in parallel at predetermined intervals, and (b) a ridge with a cross-section of trapezoidal shape having a strip-shaped planar portion on one side is formed between adjacent straight grooves; a second step, making at least The vertical surface and the inclined surface are covered with a light-reflecting material to manufacture an intermediate body; in the third step, an anti-reflective layer covering the light-reflecting material is formed in the area overlapping each of the linear slots when viewed from one side of the intermediate body to manufacture a light control panel; and in the fourth step, using two light control panels, one side or the other side of one light control panel is arranged opposite to the other light control panel in such a way that the vertical surfaces of the linear slots of one light control panel and the vertical surfaces of the linear slots of the other light control panel are orthogonal when viewed from above to manufacture an aerial imaging device, wherein the aerial imaging device uses the surface of the vertical side of the light-reflecting material covering the vertical surfaces of the linear slots of one light control panel as the first light-reflecting surface, and the surface of the vertical side of the light-reflecting material covering the vertical surfaces of the linear slots of the other light control panel as the second light-reflecting surface.

[0023] In the manufacturing method of the aerial image imaging device of the second invention, in the second step, the light-reflecting material is filled inside each of the straight grooves of the molded body, thereby covering the inner surface of each of the straight grooves, including the vertical surface and the inclined surface, with the light-reflecting material. In the third step, the anti-reflective layer is formed on one side of the light-reflecting material filled in each of the straight grooves.

[0024] In the manufacturing method of the aerial imaging device of the second invention, preferably, in the second step, after forming a peelable cover layer on the surface of at least each of the strip-shaped planar portions of the molded body, the vertical surface and the inclined surface of at least each of the straight grooves are covered with the light-reflective material to manufacture the intermediate body; in the third step, after the light-reflective material covering the inner surface of at least each of the straight grooves of the intermediate body is covered with an anti-reflective material, the cover layer formed on each of the strip-shaped planar portions and the unwanted light-reflective material and unwanted anti-reflective material attached to each of the cover layers are removed to form the anti-reflective layer.

[0025] In the manufacturing method of the aerial image imaging device of the second invention, in the third step, a non-transparent cover material covering each of the straight grooves and each of the strip-shaped planar portions is disposed on one side of the intermediate body. The area of ​​the cover material overlapping with each of the strip-shaped planar portions is pressurized and joined with each of the strip-shaped planar portions to make it transparent, thereby forming the anti-reflective layer in the area of ​​the cover material overlapping with each of the straight grooves.

[0026] In the manufacturing method of the aerial imaging device of the second invention, preferably, before the third step, in the second step, after a peelable cover layer is formed on the surface of at least each of the strip-shaped planar portions of the molded body and the vertical and inclined surfaces of at least each of the straight grooves are covered by the light-reflecting material, the cover layer formed on each of the strip-shaped planar portions and the unwanted light-reflecting material attached to each of the cover layers are removed, thereby manufacturing the intermediate body.

[0027] In the aerial image imaging apparatus of the third invention according to the stated object, the aerial image imaging apparatus is formed as a flat plate having a parallel-arranged incident light surface and an exit light surface. The aerial image imaging apparatus has a plurality of first light reflecting surfaces arranged parallel to the incident light surface at right angles and at predetermined intervals, and a plurality of second light reflecting surfaces arranged parallel to the exit light surface at right angles and at predetermined intervals. The first light reflecting surfaces and the second light reflecting surfaces are orthogonally arranged when viewed from above. The aerial image imaging apparatus includes: a molded body made of transparent resin, with one side of the molded body... The molded body has a plurality of first straight grooves with triangular or trapezoidal cross-sections and a first protrusion with a trapezoidal cross-section on one side, and a plurality of second straight grooves with triangular or trapezoidal cross-sections and a second protrusion with a trapezoidal cross-section on the other side. The plurality of first straight grooves are arranged parallel to one side with one side as a vertical surface and the other side as an inclined surface. The first protrusions are formed between adjacent first straight grooves and have a first strip-shaped planar portion on one side. The plurality of second straight grooves are arranged parallel to one side with one side as a vertical surface and the other side as an inclined surface. The second convex strip is formed between adjacent second straight grooves and has a second strip-shaped planar portion on the other side, extending outwards to the other side for inclined surfaces; a first light-reflecting material and a second light-reflecting material cover at least the vertical surface and the inclined surface of the inner surface of each of the first straight grooves and the second straight grooves of the molded body; and a first anti-reflective layer and a second anti-reflective layer, which, when viewed from one side of the molded body, are adjacent to each of the second straight grooves. The overlapping area of ​​the 1st straight groove and the overlapping area of ​​each of the 2nd straight grooves when viewed from the other side of the molded body cover the 1st light-reflecting material and the 2nd light-reflecting material. The vertical surface of each of the 1st straight grooves and the vertical surface of each of the 2nd straight grooves are orthogonally arranged when viewed from above. The surface of the 1st light-reflecting material covering the vertical surface of each of the 1st straight grooves is the 1st light-reflecting surface, and the surface of the 2nd light-reflecting material covering the vertical surface of each of the 2nd straight grooves is the 2nd light-reflecting surface.

[0028] In the aerial imaging device of the third invention, it is preferable that the aerial imaging device comprises: a first cover material covering each of the first straight grooves and each of the first strip-shaped planar portions on one side of the molded body; and a second cover material covering each of the second straight grooves and each of the second strip-shaped planar portions on the other side of the molded body, wherein a first light-transmitting layer and a second light-transmitting layer are formed respectively in the regions of the first cover material overlapping with each of the first strip-shaped planar portions and the regions of the second cover material overlapping with each of the second strip-shaped planar portions, and wherein a first anti-reflective layer and a second anti-reflective layer are formed respectively in the regions of the first cover material overlapping with each of the first straight grooves and the regions of the second cover material overlapping with each of the second straight grooves.

[0029] In the aerial image imaging device of the fourth invention according to the stated purpose, the aerial image imaging device is formed as a flat plate having a parallel-arranged incident light surface and an exit light surface. The aerial image imaging device has a plurality of first light reflecting surfaces arranged parallel to the incident light surface at right angles and at predetermined intervals, and a plurality of second light reflecting surfaces arranged parallel to the exit light surface at right angles and at predetermined intervals. The first and second light reflecting surfaces are orthogonally arranged when viewed from above. The aerial image imaging device comprises two light control panels, each having a molded body, a light-reflecting material, and an anti-reflective layer. The molded body is molded from transparent resin and has a plurality of straight grooves with triangular or trapezoidal cross-sections and trapezoidal protrusions on one side. The plurality of straight grooves expand outwards to one side with one side as a vertical plane and the other side as an inclined plane and are arranged parallel at predetermined intervals. The protrusions are formed between adjacent straight grooves and... One side has a strip-shaped planar portion, and the light-reflecting material covers at least the vertical surface and the inclined surface of the inner surface of each of the straight grooves of the molded body. The anti-reflective layer covers the area of ​​the light-reflecting material that overlaps with each of the straight grooves when viewed from one side of the molded body. In this aerial imaging device, one side or another side of one light control panel is arranged opposite to another side or another side of another light control panel in such a way that the vertical surfaces of each of the straight grooves of one light control panel and the vertical surfaces of each of the straight grooves of another light control panel are orthogonal when viewed from above. The surface of the vertical side of the light-reflecting material covering the vertical surface of each of the straight grooves of one light control panel is the first light-reflecting surface, and the surface of the vertical side of the light-reflecting material covering the vertical surface of each of the straight grooves of another light control panel is the second light-reflecting surface.

[0030] In the aerial image imaging device of the fourth invention, preferably, a cover material covering each of the linear grooves and each of the strip-shaped planar portions is provided on one side of each of the light control panels, a light-transmitting layer is formed in the area of ​​each cover material that overlaps with each of the strip-shaped planar portions, and an anti-reflective layer is formed in the area of ​​each cover material that overlaps with each of the linear grooves.

[0031] Invention Effects

[0032] In the manufacturing method of the aerial imaging device of the first invention, when the inner surfaces of each of the first and second straight grooves of the molded body are covered with light-reflecting material, it is not necessary to spend time ensuring that the inner surfaces of each of the first and second straight grooves are not covered by light-reflecting material except for the vertical surfaces, and it is not necessary to remove the light-reflecting material covering the inner surfaces of each straight groove except for the vertical surfaces, thereby simplifying the manufacturing process. Furthermore, in the manufacturing method of the aerial imaging device of the second invention, when the inner surfaces of each of the straight grooves of the molded body are covered with light-reflecting material, it is not necessary to spend time ensuring that the inner surfaces of each straight groove are not covered by light-reflecting material except for the vertical surfaces, and it is not necessary to remove the light-reflecting material covering the inner surfaces of each straight groove except for the vertical surfaces, thereby simplifying the manufacturing process.

[0033] In the aerial image imaging device of the third invention, the first antireflective layer and the second antireflective layer are formed in such a way that they do not overlap with the first light-reflecting material and the second light-reflecting material covering at least the vertical and inclined surfaces of each of the first and second straight slots. As a result, when an observer observes the aerial image, light (sunlight, indoor lighting, etc.) incident from the light-emitting side of the aerial image imaging device onto each of the first or second straight slots is absorbed or diffused by the first or second antireflective layer. As a result, no light reflection (normal reflection, specular reflection) caused by the light-reflecting material occurs on the inner surface of the first or second straight slot, resulting in excellent sharpness and visibility of the aerial image. Furthermore, in the aerial image imaging device of the fourth invention, an anti-reflective layer is formed in such a way that it does not overlap with the light-reflecting material covering at least the vertical and inclined surfaces of each straight groove. As a result, when an observer observes the aerial image, the light (sunlight, indoor lighting, etc.) emitted from the light-emitting side of the aerial image imaging device toward each straight groove is absorbed or diffused by the anti-reflective layer, so that no light reflection (normal reflection, specular reflection) caused by the light-reflecting material occurs on the inner surface of each straight groove, resulting in excellent sharpness and visibility of the aerial image. Attached Figure Description

[0034] Figure 1 (A) and (B) are front and side sectional views of an aerial image imaging device manufactured using the manufacturing method of the aerial image imaging device according to the first embodiment of the present invention, respectively.

[0035] Figure 2This is a cross-sectional view showing the first step of the manufacturing method of the aerial imaging device.

[0036] Figure 3 (A) and (B) are cross-sectional views showing the second step of the manufacturing method of the aerial imaging device.

[0037] Figure 4 This is a cross-sectional view showing the third step in the manufacturing method of the aerial imaging device.

[0038] Figure 5 (A) and (B) are cross-sectional and top views, respectively, showing the optical control panel manufactured in the third step of the manufacturing method of the aerial imaging device.

[0039] Figure 6 (A) and (B) are front and side sectional views, respectively, showing a modified example of an aerial imaging device manufactured using the manufacturing method of the aerial imaging device.

[0040] Figure 7 (A) and (B) are front and side sectional views of an aerial image imaging device manufactured using the manufacturing method of the aerial image imaging device according to the second embodiment of the present invention, respectively.

[0041] Figure 8 (A) and (B) are front and side sectional views respectively showing the first step of the manufacturing method of the aerial imaging device.

[0042] Figure 9 (A) and (B) are front and side sectional views showing the second step of the manufacturing method of the aerial imaging device.

[0043] Figure 10 (A) and (B) are front and side sectional views showing the third step of the manufacturing method of the aerial imaging device.

[0044] Figure 11 (A) and (B) are front and side sectional views of an aerial image imaging device manufactured using the manufacturing method of the aerial image imaging device according to the third embodiment of the present invention, respectively.

[0045] Figure 12 (A) and (B) are front and side sectional views respectively showing the second step of the manufacturing method of the aerial imaging device.

[0046] Figure 13 (A) and (B) are front and side sectional views of an intermediate body manufactured in the second step of the manufacturing method of the aerial imaging device, respectively.

[0047] Figure 14(A) and (B) are front and side sectional views showing the third step of the manufacturing method of the aerial imaging device. Detailed Implementation

[0048] Regarding the manufacturing method of the aerial image imaging apparatus of the first embodiment of the present invention and the aerial image imaging apparatus, while referring to the appendix... Figure 1 The explanation will be provided later.

[0049] like Figure 1 As shown in (A) and (B), the aerial image imaging device 10 manufactured by the manufacturing method of the aerial image imaging device according to the first embodiment of the present invention is formed as a flat plate having a light-incident surface 11 and a light-exit surface 12 arranged in parallel. The aerial image imaging device 10 has a plurality of first light-reflecting surfaces 13 arranged in parallel with the light-incident surface 11 at right angles and at predetermined intervals, and a plurality of second light-reflecting surfaces 14 arranged in parallel with the light-exit surface 12 at right angles and at predetermined intervals. The first light-reflecting surfaces 13 and the second light-reflecting surfaces 14 are orthogonally arranged when viewed from above.

[0050] In manufacturing the aerial imaging device 10, it is produced by molding transparent resin (e.g., injection molding, stamping, or roll forming). Figure 2 The plate-shaped molded body 21 shown has a plurality of trapezoidal straight grooves 18 arranged in parallel at predetermined intervals on one side of the molded body 21, with one side as a vertical surface 16 and the other side as an inclined surface 17. Between adjacent straight grooves 18, there are ridges 20 with trapezoidal cross-sections having strip-shaped planar portions 19 on one side. When the width of the opening on one side of the straight groove 18 (the length of the upper base of the trapezoidal cross-section) is a, the width of the bottom surface 22 of the straight groove 18 (the length of the lower base of the trapezoidal cross-section) is b, the depth of the straight groove 18 (the height of the trapezoidal cross-section) is h, and the spacing of the straight grooves 18 (= the spacing of the ridges) is p, it is preferable that a is about 1.5 to 2 times b, p is about 3 to 5 times a, and h is about 1 to 2 times p. For example, when a = 70 μm, the above relationship can be satisfied by setting b = 40 μm, p = 250-300 μm, and h = 300-400 μm, but it is not limited to this. In addition, the spacing p does not need to be uniform (equally spaced) in all areas, and it can also be non-uniform (different spacing depending on the position). Moreover, the inclination angle θ of the inclined surface 17 of the straight groove 18 relative to the vertical surface 16 (the angle formed by the vertical surface 16 and the inclined surface 17) is, for example, about 1 to 10 degrees, but it can be appropriately selected considering the demolding properties of the molded body 21.

[0051] In addition, in this embodiment, the straight groove 18 is set as a trapezoidal cross section, but the bottom surface 22 is not a necessary structure for the aerial image imaging device 10. Therefore, it is not necessary to strictly manage the size of the bottom surface 22. Alternatively, the straight groove can be formed as a cross section triangle with one side as a vertical plane and the other side as an inclined plane, expanding to one side (the same applies in the following embodiments).

[0052] The molding of the molded body 21 preferably uses a thermoplastic resin with a high melting point and high transparency. Specifically, for example, ZEONEX (registered trademark, glass transition temperature Tg = 100-160°C, refractive index η1 = 1.535, a cyclic olefin polymer) can be used, but other thermoplastic resins such as polymethyl methacrylate (acrylic resin), amorphous fluoropolymer, PMMA (acrylic), optical polycarbonate, fluorene-based polyester, and polyethersulfone can also be used. In addition, after molding, the molded body 21 is preferably annealed to remove residual stress, etc. (as described in step 1 above).

[0053] Next, as Figure 3 As shown in (A), a peelable cover layer 24 is formed on the surface of each strip-shaped planar portion 19 of the molded body 21. The cover layer 24 is formed, for example, by applying or transferring a liquid, gel-like, or jelly-like coating material onto the surface of each strip-shaped planar portion 19 using a brush, roller, or stamp and then curing it, or by pressing an adhesive film formed on the surface of a substrate such as a film or sheet onto the surface of each strip-shaped planar portion 19 and then transferring it. For example, when the cover layer is formed by spraying liquid coating material using a sprayer or the like, by spraying the liquid coating material from a direction perpendicular to each strip-shaped planar portion, it is possible to prevent the coating material from adhering to the inner surface (especially the vertical surface) of the straight groove.

[0054] Then, as Figure 3 As shown in (B), the inner surfaces (at least the vertical surface 16 and the inclined surface 17) of each straight groove 18 of the molded body 21 are covered with light-reflective material 25 to manufacture the intermediate body 26. Regarding the inner surfaces of the straight grooves 18, it is sufficient that at least the vertical surface 16 and the inclined surface 17 are covered with light-reflective material 25. The bottom surface 22 may or may not be covered with light-reflective material 25 (in the case where the straight groove is formed with a triangular cross-section, the vertical surface and the inclined surface are covered with light-reflective material).

[0055] The light-reflecting material 25 only needs to reflect light orthogonally (spectral reflection = uniform diffuse reflection) through its surface. For example, aluminum or other metals can be used as raw materials and the inner surface of the straight groove 18 can be covered by methods such as sputtering, metal evaporation, spraying metal particles, irradiation with an ion beam, or coating or plating with a metal paste. Unwanted light-reflecting material 25' adhering to the cover layer 24 covering each strip-shaped planar portion 19 is removed as an adhering material in a later process. Therefore, no special effort is needed to prevent the light-reflecting material from adhering to the strip-shaped planar portion 19, thus simplifying the process. In this embodiment, the unwanted light-reflecting material 25' adheres to the entire surface of the cover layer 24. However, the amount and extent of the unwanted light-reflecting material vary depending on the type of light-reflecting material, etc., so sometimes the unwanted light-reflecting material only adheres to a portion of the surface of the cover layer 24. To reduce waste of light-reflecting material, it is preferable to prevent the light-reflecting material from adhering to the cover layer as much as possible. If the light-reflecting material can be selectively adhered only to the inner surface of the straight groove, the cover layer formation process can be omitted. (Above, Step 2).

[0056] Next, as Figure 4 As shown, an anti-reflective layer 27 is formed on the inner surface of each straight groove 18 covering the intermediate body 26, which includes a light-reflective material 25. Therefore, the portion of the inner surface of each straight groove 18 initially covered by the light-reflective material 25 is covered from above by the anti-reflective layer 27, but any portion not covered by the light-reflective material 25 is directly covered by the anti-reflective layer 27. The anti-reflective layer 27 is sufficient to block light incident from the outside into the interior of each straight groove 18 when using the aerial imaging device 10, thereby preventing the light from reaching the light-reflective material (which is opaque), and to absorb or diffuse the light, thereby preventing light reflection (normal reflection, specular reflection) (which has light absorption or light diffusion properties). For example, the anti-reflective layer 27 is preferably formed by spraying or applying a liquid anti-reflective material such as an opaque coating (preferably black) with opacity and light absorption properties into the interior of each straight groove 18 and then drying it, but it is not limited to this. In addition, liquid antireflective materials such as opaque coatings that adhere to the strip-shaped planar portion (including the covering layer and the light-reflecting material) can also be removed by solvents (such as water).

[0057] The anti-reflective layer 27 is preferably formed initially in a manner that covers the inner surface of each straight groove 18, which overlaps only on one side of the intermediate body 26 when viewed from above, i.e., the area where the light-reflective material 25 is covered. However, as in this embodiment, when a cover layer 24 is formed on the surface of each strip-shaped planar portion 19, even if unwanted anti-reflective material (not shown) is attached to the cover layer 24 (here, to the surface of the unwanted light-reflective material 25' attached to the cover layer 24) during the formation of the anti-reflective layer, it is removed in a later process as an attachment on the cover layer 24, along with the unwanted light-reflective material 25', using adhesive tape or the like. At this time, as long as the adhesion force between the cover layer and the strip-shaped planar portion (molded body) is less than the adhesion force between the cover layer and the light-reflective material, the unwanted light-reflective material and the unwanted anti-reflective material on the cover layer will be removed (peeled off) along with the cover layer. Furthermore, if the adhesion between the cover layer and the strip-shaped planar portion (molded body) is greater than the adhesion between the cover layer and the light-reflecting material, and part or all of the cover layer remains, the remaining cover layer is removed separately. Additionally, if there are areas on the surface of the cover layer where no unwanted light-reflecting material is attached, the unwanted anti-reflective material may adhere directly to the cover layer. In this case, the unwanted anti-reflective material is also removed as an attachment to the cover layer.

[0058] After forming the anti-reflective layer 27, each cover layer 24 and any adhering materials (unwanted light-reflecting materials and unwanted anti-reflective materials) attached to each cover layer 24 are removed, thereby... Figure 5 As shown in (A), an anti-reflective layer 27, comprising a light-reflective material 25, is formed to cover only the inner surface of each linear groove 18, thereby manufacturing a light control panel 28. When the light control panel 28 is viewed from above, as shown... Figure 5 As shown in (B), an anti-reflective layer 27 is formed covering the area (shaded area) where the light-reflective material 25 is covered when viewed from above, overlapping with each straight groove 18 on one side. Alternatively, the anti-reflective layer can also be formed by filling the interior (space) of each straight groove with a gel-like or jelly-like anti-reflective material (e.g., a semi-molten synthetic resin colored black) and curing it (as described in step 3 above).

[0059] Next, as Figure 1 As shown in (A) and (B), two light control panels 28 are used, with one side of one light control panel 28 facing the other in a manner that the vertical surfaces 16 of the straight grooves 18 of one (here, the lower side) light control panel 28 are orthogonal to the vertical surfaces 16 of the straight grooves 18 of the other (here, the upper side) light control panel 28 when viewed from above. Here, one side of one light control panel 28 and one side of the other light control panel 28 are bonded together via a transparent adhesive layer 30 to form an integral unit.

[0060] The transparent adhesive layer 30 is formed of a transparent adhesive with high transparency and a refractive index η2 that is the same as the refractive index η1 of the transparent resin used for molding the molded body 21. When Zeonex is used in the molding of the molded body 21, a low-Tg epoxy-based optical adhesive with a glass transition temperature Tg of 49–67°C and a refractive index η2 of 1.45–1.57 is preferably used as the transparent adhesive, but it is not limited to this. In addition, depending on the material of the transparent resin used for molding the molded body 21, various transparent adhesives such as UV-curable, heat-curable, or two-component mixed (room temperature curable) types can be appropriately selected (see step 4 above).

[0061] Through the above procedures, such as Figure 1 As shown in (A) and (B), an aerial image imaging device 10 is obtained. This aerial image imaging device 10 consists of two light control panels 28, each having a molded body 21, a light-reflecting material 25, and an anti-reflective layer 27. The molded body 21 is molded from transparent resin. One side of the molded body 21 has a plurality of trapezoidal straight grooves 18 and trapezoidal protrusions 20. The plurality of straight grooves 18 expand outwards to one side with one side as a vertical surface 16 and the other side as an inclined surface 17, and are arranged parallel at predetermined intervals. The protrusions 20 are formed between adjacent straight grooves 18 and have a strip-shaped planar portion 19 on one side. The light-reflecting material 25 covers at least the vertical surface 16 and the inclined surface 17 of the inner surface of each straight groove 18 of the molded body 21. The anti-reflective layer 27 covers the area overlapping with each straight groove 18 when viewed from one side of the molded body 21. In this aerial imaging device 10, one side of one light control panel 28 is arranged opposite to another light control panel 28 in such a way that the vertical surfaces 16 of each straight groove 18 of one light control panel 28 and the vertical surfaces 16 of each straight groove 18 of another light control panel 28 are orthogonal when viewed from above. The surface of the light reflective material 25 covering the vertical surfaces 16 of each straight groove 18 of one light control panel 28 is designated as the first light reflective surface 13, and the surface of the light reflective material 25 covering the vertical surfaces 16 of each straight groove 18 of another light control panel 28 is designated as the second light reflective surface 14.

[0062] The operation of the aerial imaging device 10 will be explained below.

[0063] exist Figure 1In (A) and (B), light L1 emitted from the object not shown is incident from P1 on the incident surface 11 (here, the surface on the other side of the lower light control panel 28) into the interior of the air image imaging device 10 (the lower light control panel 28), is reflected by P2 on the first light reflecting surface 13, enters the upper light control panel 28 from the lower light control panel 28, is reflected by P3 on the second light reflecting surface 14, and is emitted into the air from P4 on the exit surface 12 (here, the surface on the other side of the upper light control panel 28).

[0064] Here, after light L1 is reflected at P2, it passes through the transparent adhesive layer 30 at Q1. However, since the refractive index η1 of the transparent resin that forms the substrate (molded body 21) of the light control panel 28 is the same as the refractive index η2 of the transparent adhesive layer 30, and the thickness of the transparent adhesive layer 30 is relatively thin (around 5-50 μm), the influence of the transparent adhesive layer 30 on refraction is very small and can be ignored. Moreover, the interface between the transparent resin that forms the substrate (molded body 21) of the light control panel 28 and the transparent adhesive layer 30 will not cause phenomena such as total internal reflection or spectral dispersion.

[0065] In this way, countless rays of light emitted from the object and reflected once each by the first light reflecting surface 13 and the second light reflecting surface 14 of the aerial image imaging device 10 are imaged in the air, thereby obtaining an aerial image (not shown) that is a real image of the object at a position symmetrical to the object across the aerial image imaging device 10. In addition, light L1 is refracted at P1 on the incident surface 11 and P4 on the exit surface 12, but the transparent resin (molded body 21) of the substrate of the upper and lower (one and the other) light control panel 28 is the same and homogeneous. Therefore, regardless of the incident position and the exit position, all the light related to the imaging of the aerial image is refracted at the same angle on the incident surface 11 and the exit surface 12 as light L1. Therefore, the refraction of these rays does not affect the imaging.

[0066] As previously explained, the covering layer 24 formed on the surface of the strip-shaped planar portion 19 in the second step is peeled off in the third step. Therefore, it can be light-transmitting (transparent) or non-light-transmitting (opaque). However, in the case where the covering material used to form the covering layer may also be attached to the inner surface of the straight groove including the vertical surface, by selecting the covering material in the manner of forming a light-transmitting (transparent) covering layer, even if the surface of the vertical surface to which the covering material is attached (with the covering layer formed) is covered by a light-reflecting material, the light will not be blocked by the covering layer when using the aerial imaging device. This allows the surface of the vertical side of the light-reflecting material to function as the first light-reflecting surface and the second light-reflecting surface.

[0067] Additionally, in this embodiment, as Figure 1As shown in (A) and (B), one side of one light control panel 28 is configured and engaged opposite to one side of another light control panel 28, but can be as follows: Figure 6 As shown in the variations (A) and (B) of the aerial image imaging device 10a, one side of one optical control panel 28 is configured and engaged opposite to the other side of another optical control panel 28, or one side of one optical control panel is configured and engaged opposite to the other side of another optical control panel. In either case, aerial image imaging can be achieved through the same operation as aerial image imaging device 10.

[0068] Next, regarding the manufacturing method of the aerial image imaging apparatus of the second embodiment of the present invention and the aerial image imaging apparatus, while referring to the appendix... Figure 1 The explanation will be provided later.

[0069] like Figure 7 As shown in (A) and (B), the aerial image imaging device 10b manufactured using the manufacturing method of the aerial image imaging device according to the second embodiment of the present invention is formed as a flat plate having a light-incident surface 11 and a light-exit surface 12 arranged in parallel. The aerial image imaging device 10b has a plurality of first light-reflecting surfaces 13 arranged in parallel at a predetermined interval with the light-incident surface 11 at right angles, and a plurality of second light-reflecting surfaces 14 arranged in parallel at a predetermined interval with the light-exit surface 12 at right angles. The first light-reflecting surfaces 13 and the second light-reflecting surfaces 14 are orthogonally arranged when viewed from above. The aerial image imaging device 10b differs from the aerial image imaging devices 10 and 10a in that a plate-shaped molded body 21a made of transparent resin has a plurality of first light-reflecting surfaces 13 formed on one side and a plurality of second light-reflecting surfaces 14 formed on the other side.

[0070] The manufacturing method of the aerial image imaging device 10b will be described below.

[0071] A plate-shaped molded body 21a is formed by molding transparent resin, such as... Figure 8As shown in (A) and (B), on one side of the molded body 21a, a plurality of first straight grooves 18a with a cross-section of trapezoidal shape, each having one side as a vertical surface 16 and the other side as an inclined surface 17, are arranged in parallel at predetermined intervals. Between adjacent first straight grooves 18a, a first protrusion 20a with a cross-section of trapezoidal shape, having a first strip-shaped planar portion 19a on one side, is formed. On the other side, a plurality of second straight grooves 18b with a cross-section of trapezoidal shape, each having one side as a vertical surface 16 and the other side as an inclined surface 17, are arranged in parallel at predetermined intervals. Between adjacent second straight grooves 18b, a second protrusion 20b with a cross-section of trapezoidal shape, having a second strip-shaped planar portion 19b on the other side, is formed. The vertical surfaces 16 of each first straight groove 18a and the vertical surfaces 16 of each second straight groove 18b are orthogonal when viewed from above. The molded body 21a is equivalent to a molded body obtained by integrally molding the molded bodies 21 of the two light control panels 28 constituting the aerial image imaging device 10a. The distance d between the bottom surface 22 of each first straight groove 18a and the bottom surface 22 of each second straight groove 18b is about 20 to 3000 μm. In addition, the shape and arrangement of the first straight groove, the second straight groove 18a, 18b and the first ridge, the second ridge 20a, 20b are the same as those of the straight groove 18 and the ridge 20 on the light-incident surface 11 side and the light-exit surface 12 side of the aerial image imaging device 10a, so the description is omitted. Moreover, the transparent resin used for molding this molded body 21a is the same as that in the first embodiment, so the description is omitted (above, first step).

[0072] Next, as Figure 9As shown in (A) and (B), an intermediate body 26a is manufactured by filling the interior of each of the first straight grooves and the second straight grooves 18a and 18b of the molded body 21a with a first light-reflecting material and a second light-reflecting material 25a and 25b, such as a metal paste, and covering the inner surfaces of each of the first straight grooves and the second straight grooves 18a and 18b, including the vertical surface 16 and the inclined surface 17 (here, the inner surfaces of each of the first straight grooves and the second straight grooves 18a and 18b formed by the vertical surface 16, the inclined surface 17 and the bottom surface 22) with the first light-reflecting material and the second light-reflecting material 25a and 25b. Preferably, the first light-reflecting material and the second light-reflecting material 25a and 25b are the same material and are selectively filled inside each of the first straight grooves and the second straight grooves 18a and 18b. However, if unwanted first light-reflecting material or second light-reflecting material is attached to the surface of each of the first strip-shaped planar portion and the second strip-shaped planar portion 19a and 19b, it can be removed in a later process by means of peeling, grinding or dissolving. Furthermore, before manufacturing the intermediate 26a (before the first light-reflecting material and the second light-reflecting material 25a, 25b are filled into the interior of each of the first straight grooves and the second straight grooves 18a, 18b), as shown by the imaginary lines, as long as a peelable first cover layer and second cover layer 24a, 24b are formed on the surface of each of the first strip-shaped planar portions and the second strip-shaped planar portions 19a, 19b, it is possible to prevent unwanted first light-reflecting material and second light-reflecting material from adhering to the surface of each of the first strip-shaped planar portions and the second strip-shaped planar portions 19a, 19b, and to prevent unwanted first light-reflecting material and second light-reflecting material adhering to the first cover layer, the second cover layer 24a, 24b and the first cover layer, the second cover layer 24a, 24b from being removed in subsequent processes. (Above, second process).

[0073] Next, as Figure 10As shown in (A) and (B), a first antireflective layer and a second antireflective layer 27a and 27b are formed on the surface of the first light-reflecting material 25a filling each of the first straight grooves 18a and the surface of the second light-reflecting material 25b filling each of the second straight grooves 18b, respectively. Preferably, the first antireflective material and the second antireflective material used to form the first antireflective layer and the second antireflective layer 27a and 27b are the same as the antireflective material used to form the antireflective layer 27 in the first embodiment, and are selectively formed on the surface of the first light-reflecting material 25a and the surface of the second light-reflecting material 25b. However, if the unwanted first antireflective material and the second antireflective material are attached to the surface of each of the first and second strip-shaped planar portions 19a and 19b when forming the first antireflective layer and the second antireflective layer 27a and 27b, they can be removed by peeling, grinding or dissolving. Furthermore, as previously explained, as long as a peelable first cover layer and second cover layer 24a and 24b are formed on the surfaces of each of the first and second strip-shaped planar portions 19a and 19b in advance, unwanted first anti-reflective material and second anti-reflective material can be prevented from adhering to the surfaces of each of the first and second strip-shaped planar portions 19a and 19b. After the first anti-reflective layer and second anti-reflective layer 27a and 27b are formed, unwanted first light reflective material and second light reflective material and unwanted first anti-reflective material and second anti-reflective material (attachment) adhering to each of the first cover layer and second cover layer 24a and 24b and each of the first cover layer and second cover layer 24a and 24b are peeled off by adhesive tape or the like. As a result, when viewed from above, the areas of the intermediate body 26a that overlap with each of the first straight grooves 18a on one side and the areas that overlap with each of the second straight grooves 18b on the other side are covered with a first anti-reflective layer and a second anti-reflective layer 27a and 27b (as described in the third process). Through the above processes, as Figure 7As shown in (A) and (B), an aerial image imaging device 10b is obtained. The aerial image imaging device 10b includes: a molded body 21a, which is molded from transparent resin. On one side of the molded body 21a are a plurality of first straight grooves 18a with a trapezoidal cross-section and a first protrusion 20a with a trapezoidal cross-section. On the other side of the molded body 21a are a plurality of second straight grooves 18b with a trapezoidal cross-section and a second protrusion 20b with a trapezoidal cross-section. The plurality of first straight grooves 18a have one side as a vertical surface 16 and the other side as... The inclined surface 17 expands outward to one side and is arranged in parallel at predetermined intervals. The first protrusion 20a is formed between adjacent first straight grooves 18a and has a first strip-shaped planar portion 19a on one side. The plurality of second straight grooves 18b expand outward to the other side with one side as a vertical surface 16 and the other side as an inclined surface 17, and are arranged in parallel at predetermined intervals. The second protrusion 20b is formed between adjacent second straight grooves 18b and has a second strip-shaped planar portion 19b on the other side. The first light reflective material... The first light-reflecting material 25a, 25b, which cover at least the vertical surface 16 and inclined surface 17 of the inner surface of each of the first straight grooves 18a, 18b of the molded body 21a; and the first anti-reflective layer 27a, 27b, which overlap with each of the first straight grooves 18a when viewed from one side of the molded body 21a and when viewed from the other side of the molded body 21a. The area overlapping with each of the second linear slots 18b is covered by the first light-reflecting material and the second light-reflecting materials 25a and 25b. The vertical surfaces 16 of each of the first linear slots 18a and the vertical surfaces 16 of each of the second linear slots 18b are orthogonally arranged when viewed from above. The surface of the first light-reflecting material 25a covering the vertical surface 16 of each of the first linear slots 18a is designated as the first light-reflecting surface 13, and the surface of the second light-reflecting material 25b covering the vertical surface 16 of each of the second linear slots 18b is designated as the second light-reflecting surface 14.

[0074] The shape and configuration of the first light reflecting surface and the second light reflecting surface 13 and 14 of the aerial imaging device 10b are similar to those of the previous one. Figure 6 The aerial image imaging device 10a of (A) and (B) is the same, therefore the aerial image imaging device 10b can be like Figure 7 As shown in (A) and (B), the same operation as the aerial image imaging device 10a is performed to achieve aerial image imaging.

[0075] Next, regarding the manufacturing method of the aerial image imaging apparatus and the aerial image imaging apparatus of the third embodiment of the present invention, while referring to the appendix... Figure 1 The explanation will be provided later.

[0076] use Figure 11The aerial image imaging device 10c and aerial image imaging device 10b manufactured by the manufacturing method of the aerial image imaging device of the third embodiment of the present invention shown in (A) and (B) (see reference) Figure 7 The difference between (A) and (B) is that, instead of the entire interior of each of the first and second straight grooves 18a and 18b being filled with a first light-reflecting material and a second light-reflecting material 25a and 25b, a first anti-reflective layer and a second anti-reflective layer 27a and 27b are formed on one side of the first light-reflecting material 25a and the other side of the second light-reflecting material 25b, respectively. Thus, the inner surfaces (here, the vertical surface 16, the inclined surface 17, and the bottom surface 22) of each of the first and second straight grooves 18a and 18b are covered by the first light-reflecting material and the second light-reflecting material 25c and 25d, thus covering each of the first straight grooves. The first cover material 31a covering the groove 18a and each of the first strip-shaped planar portions 19a, and the second cover material 31b covering each of the second straight grooves 18b and each of the second strip-shaped planar portions 19b, respectively form a first light-transmitting layer and a second light-transmitting layer 33a and 33b in the areas where the first cover material 31a overlaps with each of the first strip-shaped planar portions 19a and the areas where the second cover material 31b overlaps with each of the second strip-shaped planar portions 19b. The areas where the first cover material 31a overlaps with each of the first straight grooves 18a and the areas where the second cover material 31b overlaps with each of the second straight grooves 18b, respectively form a first anti-reflective layer and a second anti-reflective layer 34a and 34b.

[0077] The manufacturing method of the aerial imaging device 10c will be described below.

[0078] First, through the same first step as the manufacturing method of the aerial image imaging device 10b (Example 2), a [structure / process] is formed. Figure 8 The molded body 21a shown in (A) and (B).

[0079] Next, as Figure 12 As shown in (A) and (B), after peelable first cover layers and second cover layers 24a and 24b are formed on the surfaces of each of the first strip-shaped planar portions 19a and 19b of the molded body 21a, the vertical surfaces 16, inclined surfaces 17, and bottom surfaces 22 of each of the first straight grooves 18a and 18b are covered with first light-reflecting materials and second light-reflecting materials 25c and 25d. At this time, unwanted first light-reflecting materials and second light-reflecting materials 25c' and 25d' are also attached to each of the first cover layers and second cover layers 24a and 24b. Then, the first covering layer, the second covering layer 24a, 24b formed on each of the first strip planar portions 19a, 19b, and the unwanted first light-reflecting material, the second light-reflecting material 25c', 25d' attached to each of the first covering layer, the second covering layer 24a, 24b are removed, thereby manufacturing... Figure 13Intermediate 26b is shown in (A) and (B). The first cover layer, the second cover layer 24a, 24b and the first light reflective material, the second light reflective material 25c, 25d are the same as the cover layer 24 and light reflective material 25 described in the second step of the manufacturing method of the aerial image imaging device 10 (Example 1), so detailed description is omitted (above, second step).

[0080] Next, as Figure 14 As shown in (A) and (B), a non-transparent first cover material 31a covering each of the first straight grooves 18a and each of the first strip-shaped planar portions 19a is disposed on one side of the intermediate body 26b, and a non-transparent second cover material 31b covering each of the second straight grooves 18b and each of the second strip-shaped planar portions 19b is disposed on the other side. The non-transparent first and second cover materials 31a and 31b are obtained by forming an opaque adhesive layer 32a on the back side of a translucent substrate (e.g., a transparent synthetic resin sheet such as PET) 32, which is initially opaque. As the adhesive layer, it is preferable to use an adhesive layer that is, for example, black (opaque) and has opacity and light absorption in its initial state, but becomes transparent as bonding (curing) proceeds under pressure. For example, in an adhesive layer formed by dispersing microcapsules containing a curing agent within a base agent, the microcapsules in the pressurized area rupture, causing the base agent and curing agent to react and bond (cur), thereby making only the pressurized area transparent. Therefore, in Figure 14 When intermediate body 26b of (A) and (B) is pressed from both sides by rollers, etc., in a state of being stacked with the first cover material and the second cover material 31a and 31b, as Figure 11As shown in (A) and (B), the regions of the first cover material 31a overlapping with each of the first strip-shaped planar portions 19a and the regions of the second cover material 31b overlapping with each of the second strip-shaped planar portions 19b are respectively bonded to and made transparent with each of the first strip-shaped planar portions 19a and 19b, thereby forming the first light-transmitting layer and the second light-transmitting layer 33a and 33b. Thus, the regions of the first cover material 31a overlapping with each of the first straight grooves 18a and the regions of the second cover material 31b overlapping with each of the second straight grooves 18b become the first anti-reflection layer and the second anti-reflection layer 34a and 34b, respectively, thereby manufacturing the aerial image imaging device 10c. Furthermore, the first and second cover materials can be chosen appropriately as long as they have the function of being opaque and having light absorption or light diffusion properties in the initial state, and selectively becoming transparent only in the pressurized areas. Their structure is not limited to the structure of this embodiment. For example, as the first and second cover materials, a cover material can also be used where an adhesive layer, initially white or milky white and possessing opacity and light diffusing properties, is formed on the back of a translucent substrate. Only the areas of the adhesive layer that are pressed selectively become transparent. In this case, the adhesive layer, which initially appears white or milky white due to light diffusing, is selectively pressed, flattening the unevenness and making it flat, thereby becoming transparent and forming a translucent layer. The unpressurized areas of the adhesive layer maintain their initial opacity and light diffusing properties, thus functioning as the first and second anti-reflective layers (as described in the third step).

[0081] Manufactured as described above Figure 11 The shape and configuration of the first and second light reflecting surfaces 13 and 14 of the aerial image imaging device 10c in (A) and (B) are similar to those of the other two devices. Figure 6 Aerial imaging devices 10a and (A) and (B) Figure 7 The aerial image imaging device 10b of (A) and (B) is the same, therefore, as Figure 11 As shown in (A) and (B), it is capable of performing the same actions as aerial image imaging devices 10a and 10b, thereby enabling aerial image imaging.

[0082] The present invention has been described above with reference to the embodiments, but the present invention is not limited to the structure of any of the above embodiments, and also includes other embodiments or modifications that can be conceived within the scope of the claims. The present invention also includes the case where the aerial image imaging device manufacturing methods (each step) of the various embodiments are combined to manufacture the aerial image imaging device.

[0083] For example, steps 2 and 3 of the first embodiment can be replaced by the same steps as steps 2 and 3 of the second embodiment, or steps 2 and 3 of the second embodiment can be replaced by the same steps as steps 2 and 3 of the first embodiment. Furthermore, steps 2 and 3 of the first embodiment can be replaced by the same steps as steps 2 and 3 of the third embodiment, or steps 2 and 3 of the third embodiment can be replaced by the same steps as steps 2 and 3 of the first embodiment. When steps 2 and 3 of the first embodiment are replaced by the same steps as steps 2 and 3 of the third embodiment, an anti-reflective layer is formed by laminating a masking material on one side of the intermediate body to manufacture the light control panel. Then, in the fourth step, the two light control panels are combined to manufacture an aerial image imaging device. Furthermore, for the two intermediate bodies manufactured using the same process as the second process of the third embodiment in the molded body of the first embodiment, pressure is applied to each intermediate body in a state where a cover material is stacked on one side of each intermediate body in such a way as to cover each straight groove and each strip-shaped planar portion. This allows the process of manufacturing the light control panel and the process of joining the two light control panels to manufacture the aerial image imaging device simultaneously, thereby simplifying the process.

[0084] Furthermore, regardless of the aerial image imaging device, by reversing the top and bottom (front and back) and exchanging the light-incident surface and the light-outcident surface, it is possible to achieve aerial image imaging in the same way as the above embodiment.

[0085] Industrial availability

[0086] According to the manufacturing method of the aerial image imaging device of the present invention, an aerial image imaging device with clear aerial images can be obtained with simple manufacturing steps, low mass production cost. Moreover, the aerial image imaging device of the present invention can display aerial images on display parts of medical equipment, electrical products, automobiles, aircraft, ships, game consoles, advertising towers, etc., and can also be applied to contactless input devices, etc.

[0087] Label Explanation

[0088] 10, 10a, 10b, 10c: Aerial image imaging device; 11: Light-incident surface; 12: Light-exiting surface; 13: First light-reflecting surface; 14: Second light-reflecting surface; 16: Vertical surface; 17: Inclined surface; 18: Straight groove; 18a, 18b: First straight groove, second straight groove; 19: Strip-shaped planar portion; 19a, 19b: First strip-shaped planar portion, second strip-shaped planar portion; 20: Raised strip; 20a, 20b: First raised strip, second raised strip; 21, 21a: Molded body; 22: Bottom surface; 24: Covering layer; 24a, 24b: First covering layer, second covering layer; 25: Light-reflecting material; 25': Unwanted light reflection material Reflective materials; 25a, 25b: First light-reflecting material, second light-reflecting material; 25c, 25d: First light-reflecting material, second light-reflecting material; 25c', 25d': Unnecessary first light-reflecting material, second light-reflecting material; 26, 26a, 26b: Intermediate material; 27: Anti-reflective layer; 27a, 27b: First anti-reflective layer, second anti-reflective layer; 28: Light control panel; 30: Transparent adhesive layer; 31a, 31b: First and second cover materials; 32: Substrate; 32a: Adhesive layer; 33a, 33b: First light-transmitting layer, second light-transmitting layer; 34a, 34b: First anti-reflective layer, second anti-reflective layer.

Claims

1. A method for manufacturing an aerial imaging device, the aerial imaging device being formed as a flat plate having a parallel-arranged incident light surface and an exit light surface, the aerial imaging device having a plurality of first light reflecting surfaces arranged parallel to the incident light surface at right angles and at predetermined intervals, and a plurality of second light reflecting surfaces arranged parallel to the exit light surface at right angles and at predetermined intervals, the first light reflecting surfaces and the second light reflecting surfaces being orthogonally arranged when viewed from above, characterized in that, The manufacturing method of this aerial imaging device includes the following steps: In the first step, a plate-shaped molded body is formed by molding transparent resin. On one side of the molded body, (a) a plurality of first straight grooves with triangular or trapezoidal cross-sections that expand outwards to one side with one side as a vertical surface and the other side as an inclined surface are arranged in parallel at a predetermined interval; (b) a first protrusion with a trapezoidal cross-section having a first strip-shaped planar portion on one side is formed between adjacent first straight grooves. On the other side of the molded body, (c) a plurality of second straight grooves with triangular or trapezoidal cross-sections that expand outwards to the other side with one side as a vertical surface and the other side as an inclined surface are arranged in parallel at a predetermined interval; (d) a second protrusion with a trapezoidal cross-section having a second strip-shaped planar portion on the other side is formed between adjacent second straight grooves. The vertical surfaces of each first straight groove and the vertical surfaces of each second straight groove are orthogonal when viewed from above. In the second step, at least the vertical surface and the inclined surface of the inner surface of each of the first straight grooves and the second straight grooves of the molded body are covered with the first light-reflecting material and the second light-reflecting material, thereby manufacturing an intermediate body; as well as In the third step, a non-transparent first cover material covering each of the first straight grooves and each of the first strip-shaped planar portions is disposed on one side of the intermediate body, and a non-transparent second cover material covering each of the second straight grooves and each of the second strip-shaped planar portions is disposed on the other side of the intermediate body. The areas of the first cover material overlapping with each of the first strip-shaped planar portions and the areas of the second cover material overlapping with each of the second strip-shaped planar portions are pressurized to join with each of the first and second strip-shaped planar portions, thereby making them transparent. A first anti-reflective layer and a second anti-reflective layer are formed in the regions of the first cover material overlapping with each of the first straight grooves and the regions of the second cover material overlapping with each of the second straight grooves, respectively, thereby manufacturing an aerial image imaging device. The aerial image imaging device uses the surface of the first light-reflecting material covering the vertical surface of each of the first straight grooves as the first light-reflecting surface and the surface of the second light-reflecting material covering the vertical surface of each of the second straight grooves as the second light-reflecting surface.

2. The method for manufacturing the aerial image imaging device according to claim 1, characterized in that, Before the third step, in the second step, after a peelable first cover layer and a second cover layer are formed on the surface of at least each of the first strip planar portions and each of the second strip planar portions of the molded body, and the vertical and inclined surfaces of at least each of the first straight grooves and each of the second straight grooves are covered by the first light-reflecting material and the second light-reflecting material, the first cover layer and the second cover layer formed on each of the first strip planar portions and each of the second strip planar portions, and the unwanted first light-reflecting material and second light-reflecting material attached to each of the first cover layer and each of the second cover layer, are removed, thereby manufacturing the intermediate body.

3. A method for manufacturing an aerial imaging device, the aerial imaging device being formed as a flat plate having a parallel-arranged incident light surface and an exit light surface, the aerial imaging device having a plurality of first light reflecting surfaces arranged parallel to the incident light surface at right angles and at predetermined intervals, and a plurality of second light reflecting surfaces arranged parallel to the exit light surface at right angles and at predetermined intervals, wherein the first light reflecting surfaces and the second light reflecting surfaces are orthogonally arranged when viewed from above, characterized in that, The manufacturing method of this aerial imaging device includes the following steps: In the first step, a plate-shaped molded body is manufactured by molding transparent resin. On one side of the molded body, (a) a plurality of straight grooves with a cross-section of triangle or trapezoidal shape that expand outward to one side with one side as a vertical surface and the other side as an inclined surface are arranged in parallel at a predetermined interval, and (b) a convex strip with a cross-section of trapezoidal shape having a strip-shaped planar portion on one side is formed between adjacent straight grooves. In the second step, at least the vertical surface and the inclined surface of the inner surface of each of the straight grooves of the molded body are covered with a light-reflecting material to manufacture an intermediate body. In the third step, a non-transparent cover material is disposed on one side of the intermediate body, covering each of the straight grooves and each of the strip-shaped planar portions. The area of ​​the cover material that overlaps with each of the strip-shaped planar portions is pressed and joined with each of the strip-shaped planar portions to make it transparent, thereby forming an anti-reflective layer in the area of ​​the cover material that overlaps with each of the straight grooves, thereby manufacturing a light control panel. as well as In the fourth step, using two optical control panels, one side or the other side of one optical control panel is arranged opposite to the other optical control panel in such a way that the vertical surfaces of the straight grooves of each of the linear slots of one optical control panel are orthogonal when viewed from above, thereby creating an aerial image imaging device. The aerial image imaging device uses the surface of the vertical side of the light-reflecting material covering the vertical surfaces of the straight grooves of one optical control panel as the first light-reflecting surface, and the surface of the vertical side of the light-reflecting material covering the vertical surfaces of the straight grooves of the other optical control panel as the second light-reflecting surface.

4. The method for manufacturing the aerial image imaging device according to claim 3, characterized in that, Before the third step, in the second step, after a peelable cover layer is formed on the surface of at least each of the strip planar portions of the molded body and the vertical and inclined surfaces of at least each of the straight grooves are covered by the light-reflecting material, the cover layer formed on each of the strip planar portions and the unwanted light-reflecting material attached to each of the cover layers are removed, thereby manufacturing the intermediate body.

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