JP6076892B2 - Manufacturing method of light control panel used in optical imaging apparatus - Google Patents

Description

The present invention uses two light control panels formed by arranging strip-shaped light reflecting portions (mirror elements) arranged at a constant pitch, and optical imaging in which the two light control panels are arranged to face each other so that the light reflecting portions intersect. In particular, the present invention relates to a method for manufacturing the two light control panels described above at low cost.

A reflection-type plane-symmetric imaging element in which unit optical elements having two specular elements orthogonal to each other are formed on a plurality of planes as an optical imaging apparatus that forms a stereoscopic image using light (scattered light) emitted from the object surface. A light-bending surface composed of a child and a mirror surface disposed toward the light-bending surface, and an image disposed on the observation side opposite to the mirror surface across the light-bending surface from the projection object The emitted light is transmitted through the light-bending surface, reflected by the mirror surface, and further transmitted through the light-bending surface, resulting in a position reflected in a virtual mirror that has been moved to a plane symmetrical with respect to the light-bending surface. An optical system for imaging has been proposed (see Patent Document 1).

However, in the optical system described in Patent Document 1, it is very difficult to manufacture a light-bending surface composed of a reflection-type surface-symmetric imaging element, which hinders practical use.
Accordingly, the present inventor has completed an optical imaging method (apparatus) as described in Patent Document 2. This optical imaging apparatus 100 is shown in FIGS. 8 and 9, and this optical imaging apparatus 100 has a large number of belt-like planes inside the transparent flat plates 101 and 102 and perpendicular to one surface of the transparent flat plates 101 and 102. Using the first and second light control panels 105 and 106 in which the light reflecting portions 103 and 104 are formed side by side, the respective one side of each of the first and second light control panels 105 and 106 is connected to each planar light reflecting portion. 103 and 104 are configured to face each other in an orthogonal state.

Then, the light h1 and h2 from the object N are incident on the planar light reflecting portion 103 of the first light control panel 105, and the reflected lights k1 and k2 reflected by the planar light reflecting portion 103 are reflected on the second light control panel 106. The image of the object N can be formed as a real image N ′ on the opposite side of the optical imaging apparatus 100 by the reflected lights j 1 and j 2 reflected again by the planar light reflecting section 104.

And in this manufacturing method of the first (second) light control panel 105 (106), a flat plate having a constant thickness, on which the metal reflecting surface to be the flat light reflecting portion 103 (104) is formed, is reflected on the metal. A laminate is produced by laminating a large number of sheets so that the surface is arranged on one side, and this laminate is produced by cutting out so that a cut surface perpendicular to the metal reflecting surface is formed.

JP 2008-158114 A Japanese Patent No. 5085767

However, the cut-out widths of the first and second light control panels 105 and 106 are likely to vary, thereby causing a problem that the formed real image N ′ may be distorted.
In addition, since the laminate is manufactured by slicing, it is necessary to grind the cut surface again, and it is difficult to manufacture a large number of light control panels having two specular elements (planar light reflecting portions) that intersect at a fine pitch. Met.

The present invention has been made in view of such circumstances, and is a light control panel used in an optical imaging apparatus optimally used for forming (planar) light reflecting portions arranged in parallel at regular intervals in a transparent plate. An object of the present invention is to provide a manufacturing method (hereinafter also simply referred to as “light control panel manufacturing method”).

The method for manufacturing a light control panel according to the first aspect of the present invention uses two light control panels in which a plurality of strip-like light reflecting portions are arranged in parallel at a constant angle with respect to one surface, and the two light control panels are used. A method of manufacturing a light control panel used in an optical imaging apparatus in which each of the light reflecting portions is formed in contact with each other in an orthogonal state or provided with a certain gap,
Vertical a first group of rolls are horizontal grooved roll and the surface of a number of parallel grooves parallel are formed in the circumferential direction a combination of a smooth flat roll, a large number of parallel grooves parallel to the axial direction is formed A first step of arranging a second roll group in combination with a groove roll and a flat roll having a smooth surface ;
A transparent plate material having pressure deformability is passed through the first and second roll groups, and a first parallel groove having a plurality of flat groove bottoms on one surface of the transparent plate material, and the other surface of the transparent plate material A second step of forming a second parallel groove in which a number of groove bottoms orthogonal to the first parallel groove are flat ;
A third step of forming each of the light reflecting portions by performing a mirror treatment for forming a light reflecting surface only on the groove side surfaces of the first and second parallel grooves ,
In the second step, the first or second parallel groove formed earlier is filled with a material that can be removed in a later step, and then the remaining first or second parallel groove is formed.

A method for manufacturing a light control panel according to a second aspect of the present invention uses two light control panels in which a plurality of strip-like light reflecting portions are arranged in parallel at a constant angle with respect to one surface, and the two light control panels are used. A method of manufacturing a light control panel used in an optical imaging apparatus in which each of the light reflecting portions is formed in contact with each other in an orthogonal state or provided with a certain gap,
Using a first roll group in which a groove roll in which a large number of parallel grooves whose side surfaces are parallel in the circumferential direction and a flat roll having a smooth surface are combined, a large number of sheets are formed on one surface of a transparent plate having pressure deformation. A first step of forming a first parallel groove having a flat groove bottom;
The transparent plate material on which the first parallel grooves are formed is turned 90 degrees and passed through the first roll group or the second roll group having the same configuration, and the first surface is placed on the other surface of the transparent plate material. A second step of forming a second parallel groove in which a number of groove bottoms orthogonal to the parallel grooves are flat,
The first, to form a light reflecting surface have a third step of forming each said light reflecting portion only in the groove side surface of the second parallel grooves,
The third step includes
A step of covering the surface of the bank portion forming adjacent parallel grooves formed on one side of the transparent plate material and the groove bottom of the parallel grooves with an ultraviolet irradiation release resin;
B step of performing metal vapor deposition to form the light reflecting surface on the surface of the transparent plate with the surface of the bank portion and the groove bottom covered with the ultraviolet irradiation peeling resin;
C step of irradiating the transparent plate material with ultraviolet rays from one side of the other side to remove the ultraviolet irradiation peeling resin adhering to the surface of the transparent plate material, with respect to the first and second parallel grooves Install.

According to a third aspect of the present invention, there is provided a light control panel manufacturing method using two light control panels in which a plurality of strip-like light reflecting portions are arranged in parallel at a constant angle with respect to one surface. A method of manufacturing a light control panel used in an optical imaging apparatus in which each of the light reflecting portions is formed in contact with each other in an orthogonal state or provided with a certain gap,
A first roll group combining a horizontal groove roll formed with a large number of parallel grooves parallel to the circumferential direction and a flat roll having a smooth surface, and a vertical groove formed with a large number of parallel grooves parallel to the axial direction A first step of arranging a second roll group in combination with a roll and a flat roll having a smooth surface;
A transparent plate material having pressure deformability is passed through the first and second roll groups, and a first parallel groove having a plurality of flat groove bottoms on one surface of the transparent plate material, and the other surface of the transparent plate material A second step of forming a second parallel groove in which a number of groove bottoms orthogonal to the first parallel groove are flat;
The first, by performing the mirror finishing to form a light reflecting surface only in the groove side surface of the second parallel grooves, have a third step of forming the light reflecting portion, respectively,
The third step includes
A step of covering the surface of the bank portion forming adjacent parallel grooves formed on one side of the transparent plate material and the groove bottom of the parallel grooves with an ultraviolet irradiation release resin;
B step of performing metal vapor deposition to form the light reflecting surface on the surface of the transparent plate with the surface of the bank portion and the groove bottom covered with the ultraviolet irradiation peeling resin;
C step of irradiating the transparent plate material with ultraviolet rays from one side of the other side to remove the ultraviolet irradiation peeling resin adhering to the surface of the transparent plate material, with respect to the first and second parallel grooves Install.

In the method for manufacturing a light control panel according to a third aspect of the invention, in the second step, the first or second parallel groove previously formed is filled with a material that can be removed in a subsequent step, and then the remaining part It is preferable to form the first or second parallel groove.

According to a fourth aspect of the present invention, there is provided a light control panel manufacturing method using two light control panels in which a plurality of strip-like light reflecting portions are arranged in parallel at a constant angle with respect to one surface. A method of manufacturing a light control panel used in an optical imaging apparatus in which each of the light reflecting portions is formed in contact with each other in an orthogonal state or provided with a certain gap,
Between the first mold in which a large number of vertical grooves each having a parallel groove side surface and the second mold in which a large number of horizontal grooves each having a parallel groove side surface are formed, press deformation is provided. A first step of arranging a transparent plate material having,
The transparent plate material is pressed with the first mold and the second mold, and a plurality of first parallel grooves are formed on one surface of the transparent plate material, and the groove bottom is flat on the other surface of the transparent plate material. A second step of forming a second parallel groove in which a number of groove bottoms orthogonal to the first parallel groove are flat;
The first, by performing the mirror finishing to form a light reflecting surface only in the groove side surface of the second parallel grooves, have a third step of forming the light reflecting portion, respectively,
The third step includes
A step of covering the surface of the bank portion forming adjacent parallel grooves formed on one side of the transparent plate material and the groove bottom of the parallel grooves with an ultraviolet irradiation release resin;
B step of performing metal vapor deposition to form the light reflecting surface on the surface of the transparent plate with the surface of the bank portion and the groove bottom covered with the ultraviolet irradiation peeling resin;
C step of irradiating the transparent plate material with ultraviolet rays from one side of the other side to remove the ultraviolet irradiation peeling resin adhering to the surface of the transparent plate material, with respect to the first and second parallel grooves Install.

In the method for manufacturing a light control panel according to the first to fourth inventions, the surface roughness Ra of the side surfaces of the first and second parallel grooves, the groove bottoms, and the surfaces of the bank portions is 50 nm or less (more preferably 30 nm). The following hyperplane is preferable. As a result, more efficient total reflection of visible light is possible when the side surface is mirror-finished (metal deposition).

In the method for manufacturing a light control panel according to the second to fourth inventions, in the step A, the ultraviolet irradiation peeling resin is selectively applied only to the surface of the bank and the groove bottom by an ink jet printer method. It is preferable.

In the light control panel manufacturing method according to the first to fourth inventions, the first and second parallel grooves have a groove depth in a range of 0.2 to 5 times the groove width, The pitch of the first and second parallel grooves is preferably in the range of 1.2 to 4 times the groove width.

In the method for manufacturing a light control panel according to the first to fourth inventions, the transparent plate material is preferably formed of heated glass or heated transparent plastic. It should be noted that other materials may be used as long as they can be press molded.

Since the manufacturing method of the light control panel according to the first to fourth inventions forms a parallel groove on the surface of the transparent plate using a groove roll or a mold and performs a mirror surface treatment on the side surface, the light control panel Is extremely easy to manufacture, and the optical imaging apparatus can be manufactured at a lower cost.

(A), (B) is explanatory drawing of the manufacturing method of the light-control panel which concerns on the 1st Embodiment of this invention, (C) is arrow AA sectional drawing in (A). (A), (B) is explanatory drawing of the manufacturing method of the light control panel which concerns on the 2nd Embodiment of this invention, (C) is explanatory drawing of the modification of the manufacturing method of the same light control panel. (A) is explanatory drawing of the manufacturing method of the light control panel which concerns on the 3rd Embodiment of this invention, (B) is explanatory drawing of the modification of the manufacturing method of the same light control panel. It is explanatory drawing of the manufacturing method of the light control panel which concerns on the 4th Embodiment of this invention. (A)-(D) are explanatory drawings of the method of performing a mirror surface process only to the groove | channel side which opposes in the light control panel manufactured by the method concerning the 1st Embodiment of this invention. It is explanatory drawing of the arrangement | positioning method of the 1st, 2nd light control panel which concerns on a modification. (A)-(F) is explanatory drawing of the method of forming a light reflection part in the double-sided processing optical material manufactured by the method based on the 2nd-4th embodiment of this invention. It is explanatory drawing of the optical imaging apparatus which concerns on a prior art example. It is explanatory drawing of the optical imaging apparatus which concerns on a prior art example.

As shown in FIG. 5D, the optical imaging apparatus 10 finally manufactured by the method for manufacturing a light control panel according to the first to fourth embodiments of the present invention has a band-shaped light reflecting portion ( A number of parallel light beams 12 and 13 are also parallel to one surface (joint surface) 14 at a certain angle (usually 90 degrees, but may be inclined within a range of less than 90 degrees and 80 degrees or more, for example). The two (first and second) light control panels 15 and 16 installed in the vertical direction are used (see Japanese Patent No. 4865088). Hereinafter, first, the first to fourth methods for forming linear parallel grooves in the transparent plate material (for example, a heated glass plate, a heated or normal temperature transparent plastic plate) of the light control panels 15 and 16 will be described. Next, a method of forming the light reflecting surfaces 12 and 13 by performing a mirror treatment for forming a light reflecting surface only on the side surface of the parallel groove will be described.
Here, the transparent plate material in which straight parallel grooves are formed is referred to as a processing optical material. This processing optical material includes a single-side processing optical material in which parallel grooves are formed on only one surface and a double-side processing optical material in which parallel grooves orthogonal to one surface and the other surface are formed.

1A to 1C, a method for manufacturing a light control panel used in the optical imaging apparatus according to the first embodiment of the present invention for manufacturing the light control panel 15 (same for 16) ( Hereinafter, the “light control panel manufacturing method” may be simply referred to.
A groove roll 18 having a large number of parallel grooves 17 formed at a predetermined pitch in the circumferential direction and a flat roll 20 having a smooth circumferential surface 19 are prepared. The grooved roll 18 and the flat roll 20 that are arranged in parallel are rotatably supported at both ends by strong bearings, and are respectively connected to a rotational drive source (not shown) to match the outer peripheral surface speed in a certain direction (for example, the grooved roll 18 It is rotated clockwise and the flat roll 20 is rotated counterclockwise.

The distance s between the outer peripheral surfaces of the groove roll 18 and the flat roll 20 is preferably the same as the thickness t (see FIG. 1C) of the base 22 of the light control panels 15 and 16 to be formed. Each of the parallel grooves 17 formed in advance on the groove roll 18 has a rectangular cross section, and the surface roughness Ra of the groove side surface, the groove bottom surface 24, and the outer peripheral surface 27 (all exposed surfaces) of the protrusion 25 is 50 nm or less, more preferably 30 nm. In the following, mirror polishing (hereinafter referred to as “super plane”) is performed to such an extent that light is not diffusely reflected with an accuracy of 20 nm or less (the same applies to the following embodiments). In addition, if the inner surface of the groove is an ultra-flat surface during the molding process, mirror polishing is not necessary (hereinafter the same). Further, as a result, the groove side surface, the groove bottom surface, and the surface of the bank portion 25a formed on the transparent plate material 28 also have the same hyperplane.

The groove interval (groove width w) of the parallel grooves 17 is, for example, 10 μm to 1 mm, and the width of the protruding portion (bank portion) 25 formed in the middle of the adjacent parallel grooves 17 is 0.2 to 5 times the groove width w. It is preferable to set the degree. The groove depth h of the parallel groove 17 is, for example, in the range of 0.5 to 5 times the groove width w (preferably 2 to 3.5 times). The parallel grooves 17 are transferred as parallel grooves 17 a on one surface of the transparent plate material 28 by passing a transparent plate material 28 made of glass or transparent plastic and having pressure deformability between the groove roll 18 and the flat roll 20. In the parallel groove 17, it is preferable that the pitch p of each groove is 1.1 to 2 times the groove width w. The groove width w1 of the parallel groove 17a is 0.5 to 5 times the width of the bank portion 25a, and the depth h1 of the parallel groove 17a is 0.5 to 5 times the width of the bank portion 25a. The pitch p of the parallel grooves 17a is more preferably in the range of 1.2 to 4 times the groove width w1. Furthermore, the groove depth h 1 is more preferable to be 0.2 to 5 times the groove width w1.
The surface of the flat roll 20 is also preferably polished to an extremely flat surface (surface roughness Ra is 50 nm or less, and the same in the following embodiments).

In addition, the process of forming a large number of parallel grooves 17a (same in the following embodiments) in which the groove side surfaces facing one surface of the transparent plate material 28 are parallel and the groove bottom is flat is performed by heating the transparent plate material 28 and The roll 18 and the flat roll 20 are also preferably heated, and by adjusting them to a certain temperature range, distortion and cracking due to a difference in thermal expansion can be eliminated.
Synthetic resin can also be used as the transparent plate material 28. In this case, it is preferable that the temperature of the synthetic resin, the groove roll 18 and the flat roll 20 be kept within a certain range.

The diameter of the groove roll 18 and the flat roll 20 seems to be realistic, for example, about 100 to 2000 times the groove depth h, but the present invention is not limited to these numbers.
Further, the material of the groove roll 18 and the flat roll 20 can be made of stainless steel, iron, other iron alloys, nickel, nickel alloys, copper, copper alloys, etc., but it is possible to use amber having a small thermal expansion coefficient. Is preferred. It is also preferable to put a heat medium inside the groove roll 18 and keep it at a constant temperature. The single-sided processing optical material 16a is formed by the above processing.

Next, a method for manufacturing the light control panel according to the second embodiment of the present invention shown in FIGS. 2A and 2B will be described. A transparent plate 30 made of glass or transparent plastic and having pressure deformability is used.
As means for forming the parallel grooves 31 in the transparent plate material 30, the groove roll 18 and the flat roll 20 (combined as the first roll group) used in the first embodiment are used under the same conditions. However, the distance between the outer circumferential surface 27 of the groove roll 18 and the outer circumferential surface (circumferential surface 19) of the flat roll 20 is h + t, where t is the thickness of the base 32 and h is the depth of the parallel groove 31. Of course, the transparent plate material 30 that meets this requirement is used. However, when the transparent plate material 30 is sandwiched between the groove roll 18 and the flat roll 20, the material (transparent plate material) escapes only at the portion of the parallel grooves 17. It is preferable to determine the thickness of the transparent plate 30 in consideration.

As shown in FIG. 2 (A), when the transparent plate 30 is passed between the groove roll 18 and the flat roll 20 set under the above conditions, a large number of parallel grooves (first grooves) having a flat groove bottom on one surface. Parallel grooves) 31 are formed, and the other surface is a flat surface.
In this state, the transparent plate material 30 on which the parallel grooves 31 are formed is turned 90 degrees and turned over again, so that the groove roll 18 and the flat roll 20 (second roll group having the same configuration as the first roll group) are obtained again. A plurality of parallel grooves 34 (second parallel grooves) that are orthogonal to the parallel grooves 31 and have a flat groove bottom are formed on the other surface of the transparent plate 30.
When the transparent plate 30 is passed again between the groove roll 18 and the flat roll 20 at a high temperature using the transparent plate 30 as glass, the parallel grooves 31 formed on one surface may be deformed. It is preferable to form a parallel groove 34 by inserting a filler (that is, a metal rod having a rectangular cross section, for example) into which a parallel groove 34 can be removed in a subsequent process (the same applies to the following embodiments). ).

When a synthetic resin is used as the transparent plate 30, a parallel groove 31 is formed on one surface, and then the ultraviolet irradiation release resin (an example of a material) is filled in the parallel groove 31 to form a parallel groove 34 on the other surface. It is good to do.
After forming the parallel grooves 31 and 34 orthogonal to both surfaces, the transparent plate material 30 is irradiated with ultraviolet rays, and the ultraviolet irradiation release resin is peeled off. As a result, a double-sided processed optical material 30a is formed in which parallel grooves 31 are formed on one surface in the vertical direction and parallel grooves 34 are formed on the other surface in the horizontal direction.

FIG. 2 (C) shows a modification of the method for manufacturing the light control panel (double-sided processed optical material 30a) according to the second embodiment. The transparent plate 30 with the parallel grooves 31 formed on one side is shown in FIG. The parallel groove 34 can be formed on the back side by rotating 90 degrees and passing between the groove roll 18 disposed below and the flat roll 20 disposed above without being reversed.

A method for manufacturing a light control panel according to the third embodiment of the present invention will be described with reference to FIG.
A first roll group 37 and a second roll group 38 arranged in series are used as means for forming one surface and the other surface of the transparent plate 36. As the first roll group 37, a groove roll (lateral groove roll) 40 in which a large number of parallel grooves 39 whose groove side surfaces are parallel in the circumferential direction is combined with a flat roll 41 having a smooth surface. The distance between the outer peripheral surfaces of the groove roll 40 and the flat roll 41 is a distance obtained by adding the thickness t of the base portion 22 and the depth h of the groove.

As the second roll group 38, a groove roll (vertical groove roll) 44 in which a large number of parallel grooves 43 are formed along the axial direction (ridge line direction) and a flat roll 45 having a smooth surface are combined. The distance between the outer peripheral surfaces of the groove roll 44 and the flat roll 45 is a total distance of the thickness t of the base portion 22 and the groove depth h. The groove roll 40 of the first roll group 37 and the groove roll 44 of the second roll group 38 are arranged on one side and the other side with the transparent plate 36 as the center.
The transparent plate member 36, the first and second roll groups 37, 38 are heated to a predetermined temperature, and the transparent plate member 36 is passed through the first and second roll groups 37, 38 so that the first and second surfaces are orthogonal to each other. The double-sided processing optical material 47 to which the first and second parallel grooves are transferred is formed.

FIG. 3B shows a modification of the light control panel manufacturing method described above. A groove roll in which a large number of parallel grooves 39 whose groove side surfaces are parallel to each other in the circumferential direction are formed on one side of the transparent plate 36. (Horizontal groove roll) 40 is arranged with a groove roll 44 (longitudinal groove roll) in which a number of parallel grooves 43 are formed on the other side along the axial direction facing each other. First and second parallel grooves perpendicular to the surface are formed to form a double-sided processed optical material 40a. In this case, since one surface and the other surface of the transparent plate material 36 are pressed simultaneously, there is an advantage that the parallel groove on the other side is hardly deformed during processing by pressing on one side. Other conditions are the same as those in the first to third embodiments.

Next, a method for manufacturing a light control panel according to the fourth embodiment of the present invention will be described with reference to FIG.
In this embodiment, no roll is used, and a first mold 51 in which a large number of vertical grooves 50 having parallel groove side surfaces are formed, and a large number of horizontal grooves 52 in which the groove side surfaces are parallel are formed. A second mold 53 is prepared. The vertical grooves 50 and the horizontal grooves 52 are orthogonal in principle and have grooves having the same width, the same pitch, and the same depth (same in principle in the following embodiments).

A transparent plate 55 is disposed between the first mold 51 and the second mold 53, the transparent plate 55 is heated to a predetermined temperature (for example, a softening temperature), and the first and second molds are also provided. 51 and 53 are also heated to a predetermined temperature, the transparent plate 55 is pressed by the first mold 51 and the second mold 53, and the groove bottom surface, groove side surface, First and second parallel grooves 57 and 58 that are orthogonal to each other are formed by making the surface of the bank portion partitioning each groove into a hyperplane. Thereby, the double-sided processing optical material 55a is manufactured. In this case, if there is no draft, the first and second molds 51 and 53 may not be removed from the transparent plate material 55, so that a slight draft can be provided.

In the above embodiment, the parallel grooves formed on the groove roll, the vertical grooves and the horizontal grooves formed on the first and second molds are preferably formed by machining, but some etching processes are used. You can also

Next, a technique for performing mirror surface treatment only on the side surface of a parallel groove having a rectangular or square cross section formed by the above method will be described.
First, the case where the optical imaging apparatus 10 using the single-sided processing optical material (also simply referred to as processing optical material) 16a manufactured by the method for manufacturing a light control panel according to the first embodiment will be described.

As shown in FIG. 5A, the groove bottom surface 61 of the square groove 60 that is the parallel groove 17a formed in the processing optical material 16a, and a bank section (projecting part) 62 having a rectangular cross section that forms the boundary of the square groove 60. An ultraviolet irradiation release resin 65, 66 is applied to the surface 63. In this case, it is preferable to perform both coatings (surface printing) using an inkjet printer method in which the inkjet outlet is NC controlled. It should be noted that ink (ultraviolet irradiation peeling resin) is prevented from adhering to the groove side surfaces 67 and 68 of the square groove 60.

Thereafter, as shown in FIG. 5 (B), the uneven portion 70 of the processed optical material 16a is subjected to metal vapor deposition (mirror surface treatment, or may be sputtered in some cases) to obtain a mirror surface (metal glossy surface, ie, light Reflective surface). As a result, the groove side surfaces 67 and 68 of the square groove 60, the groove bottom surface 61 covered with the ultraviolet irradiation peeling resin 65, and the surface covered with the ultraviolet irradiation peeling resin 66 of the bank portion 62 forming each adjacent square groove 60. A metal vapor deposition layer 72 is formed on 63.

Next, ultraviolet rays are irradiated from the back surface of the processed optical material 16a, and the ultraviolet irradiation peeling resins 65 and 66 are removed simultaneously with the metal vapor deposition layer 72 formed thereon.
In the processed optical material 16a shown in FIG. 5C, metal reflecting surfaces (mirror surfaces, ie, light reflecting surfaces) 73 and 74 formed by vapor deposition on the groove side surfaces 67 and 68 of the square groove 60 remain. Since the portion of the square groove 60 is a space, a transparent resin 76 (an example of a transparent material) having the same or similar refractive index as that of the processing optical material 16a is filled therein if necessary. In this case, if the exposed surface of the filled transparent resin 76 has irregularities, the surface may be polished again.
Thus, the first and second light control panels 15 and 16 as shown in FIG. 5D can be formed. Since the first and second light control panels 15 and 16 have the light reflecting portions 12 and 13 that are orthogonal to each other, the optical imaging device 10 is formed and a stereoscopic image of the object can be reproduced.

In the optical imaging apparatus 10 shown in FIG. 5D, the base portions 22 of the first and second light control panels 15 and 16 are bonded together (that is, the light reflecting portions 12 and 13 have a certain gap). However, as shown in FIG. 6, the optical imaging device 75 can also be manufactured by bringing the parallel grooves 17a of the first and second light control panels 15 and 16 into contact with each other. . In this case, in order to make the base 22 as thin as possible, it may be ground or polished.

In this case, it is preferable that the parallel groove 17a is filled with a transparent filler (transparent substance) and the surface of the base portion 22 is polished. Note that the base 22 can also be removed.
Moreover, you may perform the mirror surface process (for example, vapor deposition) which forms a light reflection surface in a groove | channel side surface after the process of superimposing two transparent board | plate materials (process optical material).

Subsequently, with reference to FIG. 7, parallel grooves 31, 34 (formed in the double-sided processing optical material 30 a (47, 55 a) manufactured by the light control panel manufacturing method according to the second to fourth embodiments. A method of forming a metal reflection surface (light reflection portion) on the opposite groove side surfaces 77, 78, 94, and 95 with rectangular grooves having a rectangular cross section (similar to parallel grooves according to other embodiments) will be described.

As shown in FIGS. 7A and 7B, ultraviolet irradiation release resins 83 and 84 are applied to the surface 80 and the groove bottom 81 of the bank portion 79 that forms the parallel grooves 31. In this case, it is preferable to perform coating (surface printing) of both using an inkjet printer method in which the inkjet ejection port (discharge port) is NC controlled. It should be noted that ink (ultraviolet irradiation release resin) is prevented from adhering to the groove side surfaces 77 and 78 of the square groove.

Thereafter, as shown in FIG. 7 (C), a metal vapor deposition process (mirror surface treatment, or in some cases, a sputtering process may be performed) is performed on the concave and convex portion 85 on one side (one side) of the double-sided processing optical material 30a. A glossy surface, that is, a light reflecting surface). As a result, the uneven portion 85 is completely covered with the metal layer 86.
Next, as shown in FIG. 7C, the other side of the double-sided processing optical material 30a is irradiated with ultraviolet rays. Since the double-sided processing optical material 30a is transparent, the ultraviolet irradiation release resins 83 and 84 applied to the surface 80 of the bank portion 79 and the groove bottom 81 are peeled off.
As shown in FIG. 7D, only the metal layer 86 formed on the groove side surfaces 77 and 78 remains, and this becomes the light reflecting portion 12.

Next, as shown in FIGS. 7E and 7F, the semi-finished double-sided processed optical material 30a is turned over, and the uneven portions 87 on the upper side are subjected to FIGS. 7A to 7C. Process. That is, 1) UV irradiation peeling resin 88 is applied to the surface 90 of the bank portion 89 forming the parallel grooves 34 and the groove bottom 91, and 2) metal deposition processing is performed on the whole of the uneven portion 87, and the surface is made of metal. The layer 93 is formed, and 3) a process of irradiating ultraviolet rays from the back side to remove the ultraviolet irradiation peeling resin 88 on the surface 90 of the bank 89 and the groove bottom 91 together with the metal layer 93 thereon. FIGS. 7E and 7F show a state in which the concavo-convex portion 87 is rotated 90 degrees so that the concavo-convex portion 87 can be easily visually recognized.

In this case, although reflective layers are formed on the groove side surfaces 94 and 95 on the back side of the semi-finished double-sided processed optical material 30a, the other portions are transparent. Ultraviolet rays reach the surface 90 of the portion 89.
Through the above processing, the light reflecting portions 12 and 13 perpendicular to both surfaces of the double-sided processed optical material 30a can be formed, and can be used as they are as an optical imaging device.

In the above embodiment, it is preferable to put a filler made of a transparent material in the parallel grooves.
The plate-shaped optical material (transparent plate material) may be a solid or gel material that can be processed by a mold.

10: Optical imaging device, 12, 13: Light reflecting portion, 14: One surface (bonding surface), 15, 16: Light control panel, 16a: Single-sided processing optical material, 17, 17a: Parallel groove, 18: Groove roll, 19: Circumferential surface, 20: Flat roll, 22: Base, 24: Groove bottom, 25: Projection, 25a: Bank, 27: Outer surface, 28: Transparent plate, 30: Transparent plate, 30a: Double-sided processing optics Material: 31: parallel groove, 32: base, 34: parallel groove, 36: transparent plate material, 37: first roll group, 38: second roll group, 39: parallel groove, 40: groove roll, 40a: double-sided Processing optical material, 41: flat roll, 43: parallel groove, 44: groove roll, 45: flat roll, 47: double-sided processing optical material, 50: longitudinal groove, 51: first mold, 52: transverse groove, 53: Second mold 55: Transparent plate material 55a: Double-sided processing optical material 57: First parallel groove, 8: second parallel groove, 60: square groove, 61: groove bottom surface, 62: bank portion, 63: surface, 65, 66: ultraviolet irradiation release resin, 67, 68: groove side surface, 70: uneven portion, 72: Metal deposition layer, 73, 74: Metal reflecting surface, 75: Optical imaging device, 76: Transparent resin, 77, 78: Groove side surface, 79: Bank portion, 80: Surface, 81: Groove bottom, 83, 84: Ultraviolet Irradiation release resin, 85: uneven portion, 86: metal layer, 87: uneven portion, 88: ultraviolet irradiation release resin, 89: bank portion, 90: surface, 91: groove bottom, 93: metal layer, 94, 95: groove side

Claims (8)

Two light control panels in which a plurality of strip-like light reflecting portions are arranged in parallel at a constant angle with respect to one surface are used, and the light reflecting portions of the two light control panels are in contact with each other in an orthogonal state or a constant gap. A method of manufacturing a light control panel used in an optical imaging apparatus formed by arranging and comprising:
A first roll group combining a horizontal groove roll formed with a large number of parallel grooves parallel to the circumferential direction and a flat roll having a smooth surface, and a vertical groove formed with a large number of parallel grooves parallel to the axial direction A first step of arranging a second roll group in combination with a roll and a flat roll having a smooth surface;
A transparent plate material having pressure deformability is passed through the first and second roll groups, and a first parallel groove having a plurality of flat groove bottoms on one surface of the transparent plate material, and the other surface of the transparent plate material A second step of forming a second parallel groove in which a number of groove bottoms orthogonal to the first parallel groove are flat;
The first, by performing the mirror finishing to form a light reflecting surface only in the groove side surface of the second parallel grooves, have a third step of forming the light reflecting portion, respectively,
In the second step, the first or second parallel groove formed previously is filled with a material that can be removed in a subsequent step, and then the remaining first or second parallel groove is formed. A method of manufacturing a light control panel for use in a featured optical imaging apparatus. Two light control panels in which a plurality of strip-like light reflecting portions are arranged in parallel at a constant angle with respect to one surface are used, and the light reflecting portions of the two light control panels are in contact with each other in an orthogonal state or a constant gap. A method of manufacturing a light control panel used in an optical imaging apparatus formed by arranging and comprising:
Using a first roll group in which a groove roll in which a large number of parallel grooves whose side surfaces are parallel in the circumferential direction and a flat roll having a smooth surface are combined, a large number of sheets are formed on one surface of a transparent plate having pressure deformation. A first step of forming a first parallel groove having a flat groove bottom;
The transparent plate material on which the first parallel grooves are formed is turned 90 degrees and passed through the first roll group or the second roll group having the same configuration, and the first surface is placed on the other surface of the transparent plate material. A second step of forming a second parallel groove in which a number of groove bottoms orthogonal to the parallel grooves are flat,
The first, to form a light reflecting surface have a third step of forming each said light reflecting portion only in the groove side surface of the second parallel grooves,
The third step includes
A step of covering the surface of the bank portion forming adjacent parallel grooves formed on one side of the transparent plate material and the groove bottom of the parallel grooves with an ultraviolet irradiation release resin;
B step of performing metal vapor deposition to form the light reflecting surface on the surface of the transparent plate with the surface of the bank portion and the groove bottom covered with the ultraviolet irradiation peeling resin;
C step of irradiating the transparent plate material with ultraviolet rays from one side of the other side to remove the ultraviolet irradiation peeling resin adhering to the surface of the transparent plate material, with respect to the first and second parallel grooves A method of manufacturing a light control panel for use in an optical imaging apparatus, characterized by comprising: Two light control panels in which a plurality of strip-like light reflecting portions are arranged in parallel at a constant angle with respect to one surface are used, and the light reflecting portions of the two light control panels are in contact with each other in an orthogonal state or a constant gap. A method of manufacturing a light control panel used in an optical imaging apparatus formed by arranging and comprising:
A first roll group combining a horizontal groove roll formed with a large number of parallel grooves parallel to the circumferential direction and a flat roll having a smooth surface, and a vertical groove formed with a large number of parallel grooves parallel to the axial direction A first step of arranging a second roll group in combination with a roll and a flat roll having a smooth surface;
A transparent plate material having pressure deformability is passed through the first and second roll groups, and a first parallel groove having a plurality of flat groove bottoms on one surface of the transparent plate material, and the other surface of the transparent plate material A second step of forming a second parallel groove in which a number of groove bottoms orthogonal to the first parallel groove are flat;
The first, by performing the mirror finishing to form a light reflecting surface only in the groove side surface of the second parallel grooves, have a third step of forming the light reflecting portion, respectively,
The third step includes
A step of covering the surface of the bank portion forming adjacent parallel grooves formed on one side of the transparent plate material and the groove bottom of the parallel grooves with an ultraviolet irradiation release resin;
B step of performing metal vapor deposition to form the light reflecting surface on the surface of the transparent plate with the surface of the bank portion and the groove bottom covered with the ultraviolet irradiation peeling resin;
C step of irradiating the transparent plate material with ultraviolet rays from one side of the other side to remove the ultraviolet irradiation peeling resin adhering to the surface of the transparent plate material, with respect to the first and second parallel grooves A method of manufacturing a light control panel for use in an optical imaging apparatus, characterized by comprising: Two light control panels in which a plurality of strip-like light reflecting portions are arranged in parallel at a constant angle with respect to one surface are used, and the light reflecting portions of the two light control panels are in contact with each other in an orthogonal state or a constant gap. A method of manufacturing a light control panel used in an optical imaging apparatus formed by arranging and comprising:
Between the first mold in which a large number of vertical grooves each having a parallel groove side surface and the second mold in which a large number of horizontal grooves each having a parallel groove side surface are formed, press deformation is provided. A first step of arranging a transparent plate material having,
The transparent plate material is pressed with the first mold and the second mold, and a plurality of first parallel grooves are formed on one surface of the transparent plate material, and the groove bottom is flat on the other surface of the transparent plate material. A second step of forming a second parallel groove in which a number of groove bottoms orthogonal to the first parallel groove are flat;
The first, by performing the mirror finishing to form a light reflecting surface only in the groove side surface of the second parallel grooves, have a third step of forming the light reflecting portion, respectively,
The third step includes
A step of covering the surface of the bank portion forming adjacent parallel grooves formed on one side of the transparent plate material and the groove bottom of the parallel grooves with an ultraviolet irradiation release resin;
B step of performing metal vapor deposition to form the light reflecting surface on the surface of the transparent plate with the surface of the bank portion and the groove bottom covered with the ultraviolet irradiation peeling resin;
C step of irradiating the transparent plate material with ultraviolet rays from one side of the other side to remove the ultraviolet irradiation peeling resin adhering to the surface of the transparent plate material, with respect to the first and second parallel grooves A method of manufacturing a light control panel for use in an optical imaging apparatus, characterized by comprising: 5. The method of manufacturing a light control panel used in the optical imaging apparatus according to claim 2 , wherein the ultraviolet irradiation peeling resin is formed by an inkjet printer method in the step A, and the surface of the bank portion and the groove bottom. A method of manufacturing a light control panel for use in an optical imaging apparatus, wherein the light control panel is selectively applied only to the optical image forming apparatus. The method of manufacturing a light control panel for use in optical imaging device according to any one of claims 1 to 5, wherein the first groove side surface and the groove bottom and the surface of the bank portion of the second parallel grooves, the surface roughness A method of manufacturing a light control panel used in an optical imaging apparatus, wherein the degree Ra is a hyperplane of 50 nm or less. The method of manufacturing a light control panel for use in optical imaging device according to any one of claims 1 to 6, wherein the first, second parallel grooves, 0.2-5 times the groove width groove depth And the pitch of the first and second parallel grooves is in the range of 1.2 to 4 times the groove width. A method of manufacturing a light control panel used in an optical imaging apparatus. In the manufacturing method of the light control panel used for the optical imaging device of any one of Claims 1-7 , the said transparent board | plate material is formed with the heated glass or the heated transparent plastic, It is characterized by the above-mentioned. A method for manufacturing a light control panel for use in an optical imaging apparatus.

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