JP6392102B2 - Manufacturing method of optical panel for aerial imaging - Google Patents

Description

  The present invention relates to a method for manufacturing an optical panel for aerial imaging.

  In recent years, there has been proposed an aerial imaging apparatus that forms an image of a stereoscopic image of a subject in the air on the other side when light from the subject (actual object) is incident from one side. This aerial imaging apparatus uses an aerial imaging optical panel, and it appears to the people on the other side that the subject is at the position of the stereoscopic image formed by the aerial imaging apparatus. Such an aerial imaging apparatus can be developed for application media such as an advertising medium such as digital signage and an aerial touch panel in which a stereoscopic image of the touch panel appears in the air.

  FIG. 6 shows an aerial imaging apparatus 1 having a simple structure. This aerial imaging apparatus 1 has basically the same structure as that described in Patent Documents 1 and 2. The aerial imaging apparatus 1 is configured by overlapping two aerial imaging optical panels 2 and 2 '. In the optical panel 2, a large number of light reflecting portions 22 are formed in the transparent flat plate 21 so as to extend vertically from the surface 21a on one side to the surface 21b on the other side of the transparent flat plate 21, and have a predetermined pitch. Are arranged in stripes. The optical panel 2 ′ also has a structure having a transparent flat plate 21 ′ and a light reflecting portion 22 ′ similar to the transparent flat plate 21 and the light reflecting portion 22 of the optical panel 2. In the aerial imaging apparatus 1, the two optical panels 2 and 2 'are overlapped and brought into close contact so that the light reflecting portions 22 and 22' are perpendicular to each other. The aerial imaging apparatus 1 reflects light from the subject N incident on one side of the optical panel 2 by a light reflecting portion 22 (a point indicated by a in FIG. 6), and reflects the reflected light of the optical panel 2 ′. The light is reflected again by the light reflecting portion 22 ′ (the point indicated by a ′ in FIG. 6), and the stereoscopic image N ′ is imaged in the air on the other side.

  The outline of the manufacturing method of such an optical panel 2 is as follows. That is, first, the light reflecting layer 32 is attached to both surfaces or one surface of the transparent substrate 31 by metal vapor deposition or the like, thereby thinly (for example, about 0.2 to 3 mm) and a predetermined size (for example, 25 to 3 mm). A flat plate 30 of about 100 cm square is manufactured. Next, as shown in FIG. 7A, a large number of flat plates 30 (for example, about 500 to 1500) are stacked and bonded. By doing so, the laminated body 3 is formed as shown in FIG.7 (b). Next, as shown in FIG. 8B, the laminate 3 shown in FIG. 8A is cut in a direction perpendicular to the light reflecting layer 32, and a plurality of optical panels 2 are cut out. The cut surface is polished so that the panel 2 has a predetermined uniform thickness (for example, about 0.5 to 10 mm). The same applies to the optical panel 2 '.

JP 2011-175297 A JP 2013-220981 A

  By the way, the laminated body 3 in the optical panel 2 (and 2 ′) of the aerial imaging apparatus 1 has a very thin thickness (for example, about 5 μm) of the adhesive layer 4 that bonds the flat plates 30 and 30 to each other, and From the flat plate 30 located at one end of the laminated body 3 to the flat plate 30 located at the other end, it is necessary to keep constant with high accuracy. As a method for that, first, a large number of flat plates 30 are arranged at intervals between the flat plates 30 and 30 in a laminate forming container, and then a flowing adhesive is applied to the laminate. A large number of flat plates 30 are immersed in the forming container, and the end surfaces of the flat plates 30 located at one end and / or the other end are gradually pressed to remove excess adhesive, and the adhesive is made to a desired thickness. What is cured is conceivable.

  However, a method in which a flowing adhesive is allowed to flow into the laminate forming container to immerse a large number of flat plates 30 is liable to adhere to an area where the adhesive is not desired, and therefore measures must be taken.

  The present invention has been made in view of such reasons, and its purpose is to take practical measures against adhesion of an adhesive other than between the flat plates when a plurality of flat plates are laminated and bonded. An object of the present invention is to provide a method for manufacturing an optical panel for aerial imaging.

  In order to achieve the above object, the method of manufacturing an optical panel for aerial imaging according to claim 1 is a flat plate manufacturing process in which a plurality of flat plates are manufactured by attaching light reflecting layers to both surfaces or one surface of a transparent substrate. And a laminate forming step of forming a laminate by laminating and bonding the plurality of flat plates, and a cutting step of cutting the laminate in a direction perpendicular to the light reflecting layer to cut out a plurality of optical panels. And a polishing step of polishing the cut-out surface of the optical panel so as to have a predetermined thickness. In the laminate forming step, a space is formed between the flat plates, A plurality of arrayed flat plates constituting a flat plate assembly are placed on both ends of the flat plate assembly, and a protective main plate that protects the end surfaces in close contact with the end surfaces of the flat plate assemblies; Bonded annular protective main plate frame material, the protective main plate frame material A protective plate having an annular adhesive intrusion prevention material filling the space between the flat plates is provided, and a flowing adhesive is allowed to flow into the laminate forming container to Immerse the flat plate assembly, press one end surface or both end surfaces of the flat plate assembly through the protective plate body, cure the adhesive to make the flat plate assembly the laminated body, In the position, the vicinity of the surface of the side surface of the laminate is excised.

  The method for manufacturing an optical panel for aerial imaging according to claim 2 is the method for manufacturing an optical panel for aerial imaging according to claim 1, wherein the protective main plate frame member is formed of the transparent substrate of the flat plate. The same material is used.

  According to the method for manufacturing an optical panel for aerial imaging of the present invention, when a large number of flat plates are laminated and bonded, practical measures can be taken against adhesion of an adhesive other than between the flat plates. .

It is a typical perspective view which shows the mode of the laminated body formation process in the manufacturing method of the optical panel for aerial imaging which concerns on embodiment of this invention. It is an external view which shows the protective plate body used at a laminated body formation process same as the above, Comprising: (a) seeing from the side which contacts a flat plate (side contacting the end surface of a flat plate assembly), (b) (C) is viewed from the side opposite to the side in contact with the flat plate. It is the expanded sectional view cut | disconnected by AA which shows the protective plate body used at a laminated body formation process same as the above. It is a typical expanded sectional view which shows the state of a laminated body after the adhesive agent hardened | cured in the laminated body formation process same as the above. 1 is a schematic perspective view showing an example of an aerial imaging apparatus to which the above-described aerial imaging optical panel is applied, an object, and an entire stereoscopic image. FIG. It is a three-dimensional enlarged schematic diagram showing an aerial imaging apparatus to which the above-described aerial imaging optical panel is applied. It is explanatory drawing which shows the outline of the laminated body formation process to which the manufacturing method of the optical panel for aerial imaging same as the above is applied. It is explanatory drawing which shows the outline of the cutting-out process to which the manufacturing method of the optical panel for aerial imaging same as the above is applied.

  Embodiments of the present invention will be described below. An aerial imaging optical panel manufacturing method according to an embodiment of the present invention is the above-described aerial imaging optical panel 2, 2 ′ manufacturing method, which will be described below with reference to the drawings. , A laminate forming process, a cutting process, and a polishing process.

  The flat plate manufacturing step is a step of manufacturing a large number of flat plates 30 having a constant thickness by attaching the light reflecting layers 32 to both surfaces or one surface of the transparent substrate 31 (see FIG. 7A described above). As the transparent substrate 31, a transparent glass plate is usually used. In some cases, a transparent ceramic plate or the like is also possible. For example, the transparent substrate 31 having a size of about 25 to 100 cm square and a thickness of about 0.2 to 3 mm can be used. The light reflection layer 32 is made of a material that reflects light well, such as a metal material (for example, aluminum, silver, copper, etc.), and is attached to the transparent substrate 31 by sputtering, vapor deposition, plating, or the like. The thickness of the light reflection layer 32 can be, for example, about several thousand angstroms.

  The laminated body forming step is a step of forming a laminated body 3 by laminating and bonding a large number of flat plates 30 as shown in FIGS. For example, the number of flat plates 30 to be stacked can be about 500 to 1500, and the height can be about 25 to 100 cm. If the light reflecting layer 32 to be attached to the transparent substrate 31 is a single surface, a large number of flat plates 30 are laminated so that the light reflecting layer 32 is located on one side.

  Specifically, in the laminated body forming step, as shown in FIG. 1, a large number of flat plates 30 arranged at intervals between the flat plates 30 are placed in the laminated body forming container 5. . A large number of the arranged flat plates 30 constitute a flat plate assembly 3 '.

  Here, each flat plate 30 located at both ends of the flat plate assembly 3 ′ is provided with a protective plate 50 (for example, a thickness of about 1 to 5 cm). As shown in FIGS. 2 (a), (b), (c) and FIG. 3, the protective plate body 50 includes a protective main plate 50A (for example, made of ceramic such as alumina), a protective main plate frame member 50B, and an adhesive entry prevention. 50C.

  The protection main plate 50A is in close contact with the end surface of the flat plate 30 (the end surface of the flat plate assembly 3 ') to protect the end surface. The protective main plate 50A is thicker than the flat plate 30 and slightly smaller in size (size in the direction perpendicular to the thickness direction) (see FIG. 4). Around the protective main plate 50A, an annular protective main plate frame member 50B bonded to the peripheral side surface is provided. The protective main plate frame member 50B is preferably made of the same material as the transparent substrate 31 of the flat plate 30. The protective main plate frame member 50B has a thickness slightly smaller than the thickness of the protective main plate 50A, and the size (size in the direction orthogonal to the thickness direction) is about the same as the size of the flat plate 30.

  The protective main plate frame member 50 </ b> B is provided with an annular adhesive intrusion prevention member 50 </ b> C for filling the space between the flat plate 30. The flat plate 30 and the protection main plate 50A are in close contact, that is, only in contact with each other, but the flat plate 30 and the adhesive intrusion prevention material 50C are bonded. As the adhesive intrusion prevention material 50C, a material to which a silicon adhesive is applied can be used.

  After the flat plate assembly 3 'is formed, the flowing adhesive 4a is allowed to flow into the laminate forming container 5 to immerse the flat plate assembly 3'. At this time, penetration of the adhesive 4a into the contact surface of the flat plate 30 and the protective main plate 50A is blocked by the adhesive penetration preventing material 50C bonded to the flat plate 30.

  Next, one end surface or both end surfaces of the flat plate assembly 3 ′ are gradually pressed through the protective plate body 50, so that a desired very thin thickness is formed between the flat plates 30 and 30. Thereby, excess adhesive 4a is excluded from the flat plate assembly 3 '.

  Then, the adhesive 4a is cured. In this case, normally, either one of the protective plate bodies 50, 50 on both sides of the flat plate assembly 3 'is placed downward (see FIG. 4) and left for a long time (for example, about 20 to 24 hours). As a result, the adhesive 4 a becomes the adhesive layer 4, and the flat plate assembly 3 ′ becomes the laminate 3.

  After the adhesive 4a is cured, a process of slightly removing the vicinity of the surface of the side surface of the laminated body 3 is performed. As a result, the adhesive 4b that adheres to the side surface of the laminate 3 and hardens as shown in FIG. 4 is cut off. At this time, cutting is performed at the position of the protection main plate frame member 50B (position indicated by B in FIG. 4). In other words, the cutting blades are the upper protection main plate frame member 50B of the laminate 3, the upper adhesive intrusion prevention member 50C, the vicinity of the side surface of the laminate 3, the lower adhesive intrusion prevention member 50C, and the lower protection. The main plate frame member 50B is passed. This is performed for all side surfaces of the laminate 3. Then, the protective main plates 50A and 50A are removed by removing the slightly remaining upper and lower adhesive penetration preventing materials 50C and 50C with a cutter or the like.

  Thus, the laminate 3 can eliminate the adhesive 4b that has adhered and cured on all surfaces. At the same time, the expensive protection main plates 50A and 50A can be reused. Further, if the protective main plate frame member 50B is made of the same material as the transparent substrate 31 of the flat plate 30, it becomes easy to cut accurately.

  In the cutting-out process, as shown in FIGS. 8A and 8B described above, the laminated body 3 is cut in the vertical direction with respect to a large number of light reflecting layers 32 to cut out the optical panel 2 (or 2 ′). It is a process. As a cutting method, it is possible to employ outer peripheral blade cutting, inner peripheral blade cutting, blade saw cutting, wire saw cutting and the like. The peripheral blade cutting is a method in which a thin grinding wheel rotating at high speed is used as a cutting member and cutting is performed on the outer periphery thereof. The inner peripheral edge cutting is a method in which a donut-shaped thin grindstone that rotates at high speed is used as a cutting member and is cut at the inner periphery. The blade saw cutting is a method in which a thinly stretched thin plate (blade) is used as a cutting member and is cut while reciprocating. Wire saw cutting is a method in which a wire is used as a cutting member and is cut while reciprocating.

  The polishing step is a step of polishing the cut surface so that the optical panel 2 (or 2 ') has a predetermined uniform thickness (for example, about 0.5 to 10 mm). Further, after the polishing process, it is possible to perform processing such as adjusting the outer shape of the optical panel 2 (or 2 ') as necessary.

  As shown in FIG. 6 described above, the manufactured optical panel 2 has a large number of light reflecting portions 22 in the transparent flat plate 21 extending from the surface 21a on one side to the surface 21b on the other side of the transparent flat plate 21. They are formed perpendicular to them and arranged in stripes at a predetermined pitch. A large number of pieces of the transparent substrate 31 used for manufacturing constitute the transparent flat plate 21 of the optical panel 2, and each of the pieces of the light reflecting layer 32 becomes the light reflecting portion 22. The thickness of the flat plate 30 is a predetermined pitch between the light reflecting portions 22. The same applies to the transparent flat plate 21 ′ and the light reflecting portion 22 ′ of the optical panel 2 ′ manufactured in the same manner as the optical panel 2.

  The above-described aerial imaging apparatus 1 is configured by bringing two optical panels 2 and 2 'into close contact with each other so that the respective light reflecting portions 22 and 22' are perpendicular to each other. The optical panel 2 and the optical panel 2 'are fixed with an optical adhesive or the like. It can then be cut into various planar shapes.

  As shown in FIG. 6 described above, the aerial imaging apparatus 1 reflects light from the subject N incident on one side of the optical panel 2 by the light reflecting section 22 and reflects the reflected light of the optical panel 2 ′. The light is reflected again by the light reflecting portion 22 ′, and the stereoscopic image N ′ is formed in the air on the other side (see FIG. 5).

  By taking practical measures against the adhesion of the adhesive 4a other than between the flat plates 30 and 30 as described above, it is possible to suppress degradation of imaging characteristics and physical strength over time. .

  The method for manufacturing the optical panel for aerial imaging according to the embodiment of the present invention has been described above. However, the present invention is not limited to that described in the above-described embodiment, and the matters described in the claims. Various design changes can be made within the range. For example, the size and thickness of the flat plate 30, the number of sheets to be stacked, and the like can be appropriately determined according to the application equipment.

DESCRIPTION OF SYMBOLS 1 Aerial imaging device 2 Optical panel 21 Transparent flat plate 22 Light reflection part 3 Laminated body 3 'Flat plate assembly 30 Flat plate 31 Transparent substrate 32 Light reflection layer 4 Adhesive layer 4a Adhesive 5 Laminate formation container 50 Protection board 50A Protection Main plate 50B Protection main plate frame material 50C Adhesive intrusion prevention material 51 Press plate

Claims (2)

A flat plate manufacturing process for manufacturing a large number of flat plates by attaching a light reflecting layer to both or one side of a transparent substrate;
A laminated body forming step of laminating and bonding the multiple flat plates to form a laminated body;
Cutting out the plurality of optical panels by cutting the laminate in a direction perpendicular to the light reflecting layer;
A polishing step of polishing the cut-out surface of the optical panel to a predetermined thickness,
In the laminate forming step,
A plurality of the flat plates arranged to form a flat plate assembly are placed in a laminate forming container with an interval between the flat plates, and both ends of the flat plate assembly have their end faces. A protective main plate that protects the end face in close contact with the ring, an annular protective main plate frame member bonded to the peripheral side surface of the protective main plate, and an annular adhesive intrusion prevention member that fills a space between the protective main plate frame member and the flat plate A protective plate body comprising a material is provided,
Inject the flowing adhesive into the laminate forming container to immerse the flat plate assembly,
Press one end surface or both end surfaces of the flat plate assembly through the protective plate,
The adhesive is cured to make the flat plate assembly into the laminate,
A method of manufacturing an optical panel for aerial imaging, comprising cutting off the vicinity of the surface of the side surface of the laminate at the position of the protective main plate frame member. In the manufacturing method of the optical panel for aerial imaging according to claim 1,
The method of manufacturing an optical panel for aerial imaging, wherein the protective main plate frame member is made of the same material as the flat transparent substrate.

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