JP5904437B2 - Spatial image display device - Google Patents

Description

  The present invention relates to a spatial image display apparatus that displays an image in a space, and in particular, using a reflection-type plane-symmetric imaging element, an image of a projection object placed on one side of the element is displayed on the opposite side of the element. The present invention relates to a spatial image display device that forms an image at a position that is plane-symmetric.

  Conventionally, various optical elements have been developed in order to realize a realistic three-dimensional aerial image. For example, in Patent Document 1, an image of an object that is a projection object placed on one side of an element is formed at a position that is plane-symmetrical on the opposite side of the element by using a reflective surface-symmetric imaging element. A spatial video display device is disclosed. The reflection-type plane-symmetric imaging element used in this spatial image display device has a plurality of holes that penetrate a predetermined base in the thickness direction, and is a unit optical system that is composed of two mirror surface elements orthogonal to the inner wall of each hole An element is formed, and when light is transmitted from one surface direction of the substrate to the other surface direction through the hole, the light is reflected once by each of the two mirror elements. The light emitted from the projection is reflected by one of the two mirror elements when passing through the unit optical element of the reflective surface-symmetric imaging element, and then reflected by the mirror surface to become reflected light. The light is reflected by the other of the two specular elements of the unit optical element, and the projection object is imaged at a position reflected on the virtual mirror.

  However, since the above-described optical element requires a very fine processing technique, a spatial image display device using such an optical element has a problem that manufacturing costs are high. In view of this, the present applicant has proposed a reflection-type plane-symmetric imaging element that does not require manufacturing costs in Patent Document 2.

  1 to 3 are diagrams showing the configuration of a reflection-type plane-symmetric imaging element proposed in Patent Document 2. FIG. FIG. 1 is an external view of a reflective plane-symmetric imaging element, FIG. 2 is an external view of a rectangular parallelepiped material constituting the reflective plane-symmetric imaging element, and FIG. 3 is two mirror sheets forming the reflective plane-symmetric imaging element It is an external view which shows these combinations.

  As shown in FIGS. 1 and 3, the reflection-type plane-symmetric imaging element 2 includes two mirror sheets 21 and 22 each formed by closely contacting a large number of rod-shaped rectangular parallelepiped materials 20 in parallel.

  As shown in FIG. 2, the rectangular parallelepiped material 20 is a long member, and is represented by transparent acrylic whose one side of a rectangular cross section in the direction perpendicular to the longitudinal direction, that is, in the short direction, is several hundred μm to several cm. Made of plastic or glass rod. The length varies depending on the size of the projected image, but is about several tens mm to several m. Note that three of the four surfaces extending in the longitudinal direction are surfaces used for light transmission or reflection, and thus are in a smooth state. About 100 to 20000 rectangular parallelepiped materials 20 are used for each of the mirror sheets 21 and 22.

  As shown in FIG. 2, a light reflecting film 23 is formed on one surface of the rectangular parallelepiped material 20 extending in the longitudinal direction, thereby forming the light reflecting surface 23. The light reflecting film 23 is formed by vapor deposition or sputtering of aluminum or silver.

  With respect to such a plurality of rectangular parallelepiped members 20, a mirror sheet 21 is formed by bringing the opposite surface 24 opposite to the surface on which the light reflecting film 23 of one rectangular parallelepiped member 20 is formed into close contact with the light reflecting surface 23 of another rectangular parallelepiped member 20. , 22 are formed. As shown in FIG. 3, the mirror sheets 21 and 22 are bonded together in a state in which one of the rectangular parallelepiped materials 20 is rotated by 90 degrees so that the parallel directions of the rectangular parallelepiped materials 20 cross each other. 2 is formed. A portion where each rectangular parallelepiped material 20 of the mirror sheet 21 and each rectangular parallelepiped material 20 of the mirror sheet 22 intersect constitutes a minute mirror unit (unit optical element), and the light reflecting surface 23 of the mirror sheet 21 of each minute mirror unit is the first. The light reflecting surface 23 of the mirror sheet 22 becomes the second light reflecting surface.

  In the spatial image display device using such a reflective plane-symmetric imaging element 2, as shown in FIG. 4, an object (for example, a projection object such as an image displayed on the screen of a display device) 1 is present. The reflection-type plane-symmetric imaging element 2 is disposed on one surface side, and light from the object 1 is incident on the reflection-type plane-symmetric imaging element 2 obliquely. The observer's eye E is located on the other surface side of the reflective surface-symmetric imaging element 2, and the real image 3, that is, the spatial image 3, is located at a spatial position that is plane-symmetric with the object 1 with respect to the reflective surface-symmetric imaging element 2. Is formed. Note that the lower end A and the upper end A ′, which are both ends of the reflective plane-symmetric imaging element 2 in FIG. 4, correspond to the opposing angles A and A ′ of the reflective plane-symmetric imaging element 2 in FIG. 1. More specifically, as shown in FIG. 5, the light from the object 1 is reflected on the light reflecting surface 23 (second light reflecting surface) of the mirror sheet 22 in the direction of the arrow Y1, and the reflected light is reflected in the direction of the arrow Y2. The light is reflected on the light reflecting surface 23 (first light reflecting surface) of the mirror sheet 21 and the reflected light travels toward the observer in the direction of the arrow Y3. Each of them is reflected once, that is, twice to create a mirror image.

JP 2008-158114 A International Publication No. WO2009 / 136578 Pamphlet

  However, in the spatial image display device disclosed in Patent Document 2, a part of the light beam emitted from the object 1 (arrow Y4 shown in FIG. 5) is formed on the light reflecting surface 23 (second light reflecting surface) of the mirror sheet 22. The external light (arrow Y5 shown in FIG. 5) that hits the end surface E1 and is reflected and does not reach the observer side or comes from the surrounding environment hits the end surface E2 of the light reflecting surface 23 (first light reflecting surface) of the mirror sheet 21. The light is reflected and the observer observes unnecessary light, and the projected spatial image 3 may be unclear or the stereoscopic effect may be lost.

  The present invention has been made in view of the above circumstances. As an example of the problem, the light emitted from the projection object is efficiently used and the reflection of the external light from the surroundings is reduced, so that the spatial image is reproduced. An object of the present invention is to provide a spatial video display device capable of further improving contrast.

In order to achieve the above object, a spatial image display device according to claim 1 of the present invention is a rectangular parallelepiped in which one of four surfaces extending in the longitudinal direction is a light reflecting surface that reflects light from an object. A first mirror sheet formed by arranging a plurality of longitudinal members such that the light reflecting surface of one longitudinal member and the surface facing the light reflecting surface of another longitudinal member adjacent to the one longitudinal member overlap; A reflection-type plane-symmetric imaging element that is overlapped so that the light reflection surfaces of the two mirror sheets intersect with each other, and chamfered at a side of an end portion of the longitudinal member that extends in the longitudinal direction of the light reflection surface ; It is characterized by that.

It is an external view of a reflection type plane-symmetric image formation element. It is an external view of the rectangular parallelepiped material which comprises the reflection type plane-symmetric image formation element of FIG. It is a figure which shows the combination of two mirror sheets which form the reflection type plane-symmetric image formation element of FIG. It is the schematic of the optical system of the spatial image display apparatus using the reflection type plane-symmetric image formation element of FIG. It is a schematic diagram which shows a mode that light reflects twice in the reflection type plane-symmetric image formation element of FIG. It is an external view of the rectangular parallelepiped material which comprises the reflection type plane-symmetric image formation element which concerns on embodiment of this invention. It is an external view of the mirror sheet formed by arranging the rectangular parallelepiped materials shown in FIG. FIG. 8 is an external view of a mirror sheet formed by filling a gap or the like in the mirror sheet shown in FIG. 7 with a resin or the like. It is an external view which shows the combination of the mirror sheet | seat shown in FIG. FIG. 8 is a front view of the mirror sheet shown in FIG. 7. It is a front view of the mirror sheet shown in FIG. 1 is an external view of a reflective surface-symmetric imaging element according to an embodiment of the present invention. It is a schematic diagram which shows the effect | action of the mirror sheet | seat which comprises the reflection type plane-symmetric image formation element which concerns on embodiment of this invention. It is a schematic diagram which shows the effect | action of the mirror sheet | seat which comprises the conventional reflection type plane-symmetric image formation element. It is a schematic diagram which shows the effect | action of the modification of the mirror sheet | seat which comprises the reflection type plane-symmetric image formation element which concerns on embodiment of this invention. It is a schematic diagram which shows the effect | action of the modification of the mirror sheet | seat which comprises the reflection type plane-symmetric image formation element which concerns on embodiment of this invention. It is an external view of the reflection type plane-symmetric image formation element of other composition. It is an external view which shows the mirror surface element of the reflection type plane-symmetric image formation element shown in FIG. It is an external view which shows the mirror surface element of the reflection type plane-symmetric image formation element which concerns on embodiment of this invention. FIG. 20 is a schematic diagram showing the operation of the reflective surface-symmetric imaging element shown in FIG. 19.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, the manufacturing method and configuration of the reflective surface-symmetric imaging element 4 according to the present embodiment will be described with reference to FIGS. FIG. 6 is an external view of a rectangular parallelepiped material 20 constituting the reflective surface-symmetric imaging element 4, and FIG. 7 is an external view of mirror sheets 21 and 22 formed by arranging the rectangular parallelepiped materials 20 shown in FIG. 8 is an external view of the mirror sheets 41 and 42 formed by filling the gaps in the mirror sheets 21 and 22 shown in FIG. 7 with a resin or the like, and FIG. 9 is a combination of the mirror sheets 41 and 42 shown in FIG. It is an external view. 10 is a view (also referred to as a front cross-sectional view) of the mirror sheets 21 and 22 viewed from the front direction of FIG. 7 (direction A shown in FIG. 7), and FIG. 11 shows the mirror sheets 41 and 42 of FIG. FIG. 12 (also referred to as a front sectional view) viewed from the front direction (A direction shown in FIG. 8) and FIG. 12 are external views of the reflective plane-symmetric imaging element 4.

  The rectangular parallelepiped material 20 according to the present embodiment is obtained by chamfering the light reflecting surface 23 from the rectangular parallelepiped material 20 shown in FIG. Specifically, as shown in FIG. 6, the rectangular parallelepiped material 20 according to the present embodiment is inclined with respect to the light reflecting surface 23 along the longitudinal direction on both sides of the light reflecting surface 23 in the longitudinal direction. It is created by chamfering at a predetermined angle α (α is preferably an acute angle, for example, 15 to 45 degrees).

  The light reflecting surface 23 of the present embodiment is a light reflecting film that is formed by vapor deposition or sputtering of aluminum or silver and has a thickness of 0.1 to 10 μm. In the present embodiment, the upper and lower end surfaces of the light reflecting film are chamfered (cut / polished), but in the present specification, the chamfered portions are greatly exaggerated for the sake of explanation.

  Next, as shown in FIG. 7, each of the chamfered rectangular parallelepiped materials 20 is brought into close contact with the light reflecting surface 23 of one rectangular parallelepiped material 20 and the opposing surface 24 of another rectangular parallelepiped material 20 so as to be a flat mirror sheet. 21 and 22 are formed. As a result, as shown in FIGS. 7 and 10, a plurality of wedge-shaped voids 26 having a cross section are formed on the upper and lower surfaces (flat surfaces perpendicular to the light reflecting surface 23) of the flat mirror sheets 21 and 22. .

  Next, as shown in FIG. 8, the gap 26 on one surface of the upper and lower surfaces of the mirror sheets 21 and 22 has a black resin or adhesive (hereinafter referred to as a resin 25 a) that absorbs light, and the other A transparent resin or adhesive having a refractive index (n = 1.4 to 1.6) substantially the same as that of the base material (cuboid material 20) (hereinafter referred to as resin etc. 25b) is provided in the space 26 on the surface. Resin etc. 25a and 25b are combined and called resin etc. 25), and mirror sheets 21 and 22 are fixed. Hereinafter, the mirror sheets 21 and 22 in which the gap 26 is filled with the resin 25 or the like are referred to as mirror sheets 41 and 42, respectively. As a result, as shown in FIGS. 8 and 11, since the wedge-shaped gap 26 is filled with the resin 25 or the like, the upper and lower surfaces become flat and flat mirror sheets 41 and 42 are formed.

  Next, the mirror sheets 41 and 42 filled with the resin 25a and 25b are bonded together in a state where one of them is rotated 90 degrees so that the parallel direction of the rectangular parallelepiped materials 40 intersect as shown in FIG. Thereby, the reflection-type plane-symmetric imaging element 4 is formed. As shown in FIG. 12, the portion where each rectangular parallelepiped material 40 of the mirror sheet 41 and each rectangular parallelepiped material 40 of the mirror sheet 42 intersect constitutes a micro mirror unit (unit optical element), and the mirror sheet 41 of each micro mirror unit. The light reflecting surface 23 becomes the first light reflecting surface, and the light reflecting surface 23 of the mirror sheet 42 becomes the second light reflecting surface.

  9 and 12, when the mirror sheets 41 and 42 are overlapped in the direction of the light reflecting surface 23, the resin 25a is the surface on the side where the eye E of the observer is located, the resin 25b is The mirror sheets 41 and 42 are overlapped so as to be the surface on the side where the object 1 is located.

  Next, the operation of the reflective surface-symmetric imaging element 4 according to the present embodiment will be described with reference to FIGS. 13 and 14. FIG. 13 is a front cross-sectional view of the mirror sheets 41 and 42 constituting the reflective surface-symmetric imaging element 4, and shows a path of light incident on the mirror sheets 41 and 42, and FIG. 14 is chamfered. It is front sectional drawing of the mirror sheets 21 and 22 which comprise the conventional reflection type plane-symmetric image formation element 2 manufactured using the rectangular parallelepiped material 20, and is a figure which shows the course of the light which injects into the mirror sheets 21 and 22 is there.

  In FIGS. 13 and 14, it is assumed that the observer's eyes E are arranged above the mirror sheet and the object 1 is arranged below the mirror sheet. Further, since the mirror sheets 41 and 42 constituting the reflection type plane symmetric imaging element 4 and the mirror sheets 21 and 22 constituting the reflection type plane symmetric imaging element 2 exhibit the same action, in FIG. 13 and FIG. Shows only the action of one mirror sheet.

  In the reflection-type plane-symmetric imaging element 4 according to the present embodiment, as shown in FIG. 13, the light emitted from the object (projected object) 1 is the end face E1 of the light reflecting surface 23 of the mirror sheets 41 and 42. In this case, the resin 25b is interposed, so that it passes through the mirror sheets 41 and 42 and reaches the eyes of the observer without being reflected. Further, even if the extraneous light OL hits the end surface E2 of the light reflecting surface 23 of the mirror sheet 41, it is absorbed by the resin 25a, so that the extraneous light OL is not reflected and reaches the observer's eyes.

  On the other hand, in the conventional reflection-type plane-symmetric imaging element 2, as shown in FIG. 14, the light emitted from the object (projected object) 1 hits the end surface E1 of the light reflecting surface 23 of the mirror sheets 41 and 42 and is reflected. The extraneous light OL hits the end surface E2 of the light reflecting surface 23 of the mirror sheet 21 and is reflected and the observer observes unnecessary light, and the projected spatial image 3 is unclear. Or the stereoscopic effect may be lost.

  The reflection-type plane-symmetric imaging element 4 according to the present embodiment eliminates such inconveniences and efficiently uses the light emitted from the object 1 and reduces the reflection of external light from the surroundings. The contrast of spatial images can be further improved.

<Other embodiments>
FIG. 15 is a front sectional view of mirror sheets 41A and 42A in which the gaps 26 on the object 1 side and the viewer side of the mirror sheets 21 and 22 are filled with resin or the like 25b (Modification 1). In this case, even if the extraneous light OL coming from the surrounding environment hits the end surface E2 of the light reflecting surface 23 of the mirror sheet 41, the extraneous light is reflected to the side opposite to the viewing direction of the observer. The OL never reaches the observer's eyes. In addition, the light emitted from the object 1 is not reflected even if it hits the end surface E1 of the light reflecting surface 23 of the mirror sheets 41 and 42, and passes through the mirror sheets 41 and 42 and reaches the eyes of the observer. Light utilization efficiency can be improved.

  FIG. 16 is a front cross-sectional view of mirror sheets 41B and 42B in which the gaps 26 on the object 1 side and the observer side of the mirror sheets 21 and 22 are filled with resin or the like 25a (Modification 2). In this case, even if the extraneous light OL coming from the surrounding environment hits the end surface E2 of the light reflecting surface 23 of the mirror sheet 41, the extraneous light OL is reflected and reflected by the resin 25a. Never reach the eyes. In addition, the light use efficiency is slightly reduced as compared with the above embodiment and the first modification, but the light emitted from the object 1 is resin even if it hits the end surface E1 of the light reflecting surface 23 of the mirror sheets 41 and 42. Therefore, the reflection of the external light OL from the surroundings can be reduced, and the contrast of the spatial image can be improved.

  In the first and second modified examples, since the two mirror sheets are filled with the same resin, the manufacturing operation becomes easier and the manufacturing cost can be reduced.

  In the first and second modified examples, the two mirror sheets are filled with the same resin to form the reflective surface-symmetric imaging element. However, the resins filled in the two mirror sheets are different. Also good. For example, a mirror sheet 41C in which the gap 26 on one surface is filled with resin 25a, the gap 26 on the other surface is filled with resin 25b, and the mirror sheet 42C in which the gap 26 on both surfaces is filled with resin 25b, etc. The provided reflection-type plane-symmetric imaging element 4C may be used. In this case, it is preferable that the surface of the mirror sheet 41C filled with the resin 25b and the surface of the mirror sheet 42C filled with the resin 25b are brought into close contact with each other. Since the surface of the mirror sheet 41C filled with the resin 25a is positioned on the observer side and the surface of the mirror sheet 42C filled with the resin 25b is positioned on the object side, the light emitted from the object 1 can be used most efficiently. In addition, the reflection of extraneous light from the surroundings can be reduced.

  In the embodiment and the modification described above, the case where the gaps 26 formed in the mirror sheets 21 and 22 are filled with the resin 25 or the like has been described. The resin or the like 25 may not be filled. This is because the presence of the wedge-shaped air gap 26 can improve the utilization efficiency of light from the object 1 and reduce reflection of external light from the surroundings.

  Further, the configuration of the reflection-type plane-symmetric imaging element is not limited to the configuration in which the two mirror sheets are formed using the rectangular parallelepiped material that is the longitudinal member shown in FIGS. Any configuration may be used as long as it is an optical element that forms light as a real image in a plane-symmetrical position with respect to the reflection-type plane-symmetric imaging element. For example, the configuration of a reflection-type plane-symmetric imaging element shown in Patent Document 1 may be used. FIG. 17 is an external perspective view of such a reflection-type plane-symmetric imaging element 5, and FIG. 18 is a diagram illustrating mirror elements of the reflection-type plane-symmetric imaging element 5. More specifically, the reflection-type plane-symmetric imaging element 5 includes a plurality of holes 52 penetrating a predetermined base 51 in the thickness direction, and includes two mirror surface elements 54 a and 54 b orthogonal to the inner wall of each hole 52. The unit optical element 53 is formed, and when light is transmitted from one surface direction of the base 51 to the other surface direction through the hole, the light is reflected once by the two mirror surface elements 54a and 54b. You may do it.

  When the reflective surface-symmetric imaging element 5 is used, when the base 51 is formed of a metal such as aluminum or nickel, the mirror elements 54a and 54b are Since it naturally becomes a mirror surface, the entire base 51 can be used as a mirror surface element.

  When such a reflective surface-symmetric imaging element 5 is used, as shown in FIG. 19, the upper and lower end surfaces of the mirror elements 54a and 54b are chamfered at a predetermined angle inclined with respect to the mirror elements 54a and 54b. The reflective surface-symmetric imaging element 5A (cut and polished) is suitable. FIG. 20 is a view of the reflective surface-symmetric imaging element 5A as viewed from the right side direction of FIG. 19 (direction B of FIG. 19). Note that the chamfered inclined surface is disposed in a direction opposite to the direction of the eyes E of the observer in order to reflect the extraneous light OL on the side opposite to the direction of the eyes E of the observer.

  Accordingly, the reflection-type plane-symmetric imaging element 5A can improve the utilization efficiency of light from the object 1 and reduce reflection of extraneous light, so that the contrast of the spatial image can be further improved.

  According to the embodiment described above, it is a spatial image display device including a flat reflection type plane-symmetric imaging element that reflects light from the object 1 toward an observer, and this reflection type plane symmetry. The imaging element is formed of a light-transmitting rectangular parallelepiped having four surfaces extending in the longitudinal direction, and the rectangular parallelepiped material 20 having one of the four surfaces as a light reflecting surface 23 having a predetermined thickness is used as the reflecting surface 23. The mirror sheet 21 and the mirror sheet 22 are arranged side by side so that they are in the same direction. In the mirror sheet 21 and the mirror sheet 22, the light reflecting surface 23 of one rectangular parallelepiped material 20 and the opposing rectangular parallelepiped material 20 are opposed to each other. The mirror sheet 21 and the mirror sheet 22 are arranged in parallel with the light reflecting surface 23 so that the surfaces 24 are in contact with each other and the light reflecting surface 23 of the mirror sheet 21 and the light reflecting surface 23 of the mirror sheet 22 are orthogonal to each other. And the light from the object 1 is reflected once on the light reflecting surfaces 23 of the mirror sheet 21 and the mirror sheet 22 to form a real image 3. Two longitudinal corners of the light reflecting surface 23 having a predetermined thickness are provided with gaps 26 that are cut at a predetermined angle with respect to the light reflecting surface 23 along the longitudinal direction.

  According to the spatial image display device provided with the reflection type plane-symmetric imaging element having this configuration, the light emitted from the object is efficiently used and the reflection of the external light from the surroundings is reduced, and the contrast of the spatial image is further improved. Can be improved.

  Moreover, you may give the following structures to the said structure.

  As an example, each of the mirror sheet 21 and the mirror sheet 22 is filled with a resin 25b that is a transparent resin or an adhesive having substantially the same refractive index as that of the rectangular parallelepiped material 20 with respect to the gap 26 of the rectangular parallelepiped material 20. The mirror sheet 41A and the mirror sheet 42A may be used.

  As another example, the mirror sheet 21 is filled with a black resin or a resin 25a which is an adhesive on one flat plate side of the gap 26, and on the other flat plate side of the gap 26, The mirror sheet 41C and the mirror sheet 22 filled with a transparent resin having a refractive index substantially the same as that of the rectangular parallelepiped material 20 or the resin 25b as an adhesive, and the mirror sheet 42C filled with the resin 25b with respect to the gap 26 are used. The mirror sheet 41C and the mirror sheet 42C may be overlapped so that the flat plate side filled with the resin 25b of the mirror sheet 41C and the flat plate side filled with the resin 25b of the mirror sheet 42C abut. .

As another example, the mirror sheet 21 and the mirror sheet 22 are respectively provided on the one flat plate side of the gap 26 with a mirror sheet 41 filled with black resin or resin 25a as an adhesive, On the other flat plate side of the gap 26, a mirror sheet 42 filled with a transparent resin 25b that is a transparent resin or an adhesive having substantially the same refractive index as the rectangular parallelepiped member 20, and the mirror sheet 41 and the mirror sheet 42 are used. has a flat side which resin 25a of the mirror sheet 41 is filled, the flat side resin 25a is filled in the mirror sheet 42 may be superposed Align to abut.

  As another example, the mirror sheet 21 and the mirror sheet 22 are respectively formed as a mirror sheet 41B and a mirror sheet 42B filled with a black resin or a second resin that is an adhesive with respect to the gap 26. Also good.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made to the embodiments of the present invention without departing from the gist of the present invention. Such modifications and changes can be made, and those accompanying such modifications and changes are also included in the technical scope of the present invention.

1 Display unit 2, 4, 5, 5A, Reflective plane-symmetric imaging element 3 Spatial image (real image)
20 rectangular parallelepiped material 21, 22, 41, 42, 41A, 41B, 41C, 42, 42A, 42B, 42C mirror sheet 23 light reflecting surface 25a, 25b, 25 resin, etc. 26 gap 54a, 54b mirror surface element

Claims (5)

A rectangular parallelepiped longitudinal member in which one of the four surfaces extending in the longitudinal direction is a light reflecting surface that reflects light from an object is adjacent to the light reflecting surface of the one longitudinal member and the one longitudinal member. Reflective surface symmetry in which the light reflecting surfaces of the first mirror sheet and the second mirror sheet, which are formed in a row so that the surfaces facing the light reflecting surfaces of the other longitudinal members overlap, are overlapped so as to intersect each other. An imaging element,
A spatial image display device, wherein the longitudinal member is chamfered at a side of an end portion extending in a longitudinal direction of the light reflecting surface. The first mirror sheet and the second mirror sheet are respectively
2. The first filler, which is a transparent resin or adhesive having substantially the same refractive index as that of the longitudinal member, is filled in the void of the longitudinal member. The spatial image display device described in 1. The first mirror sheet is
One flat plate side of the void portion of the longitudinal member is filled with a second filler that is black resin or adhesive, and the other flat plate side of the void portion of the longitudinal member is cut. Is filled with a first filler which is a transparent resin or adhesive having substantially the same refractive index as the longitudinal member,
The second mirror sheet is
The first filler is filled into the void of the longitudinal member that has been cut away,
The first mirror sheet and the second mirror sheet are:
The flat plate side of the first mirror sheet filled with the first filler is overlapped with the flat plate side of the second mirror sheet filled with the first filler. The spatial image display device according to claim 1, wherein: The first mirror sheet and the second mirror sheet are respectively
One flat plate side of the void portion of the longitudinal member is filled with a second filler that is black resin or adhesive, and the other flat plate side of the void portion of the longitudinal member is cut. Is filled with a first filler which is a transparent resin or adhesive having substantially the same refractive index as the longitudinal member ,
The first mirror sheet and the second mirror sheet are:
A flat side of the second filler is filled in the first mirror sheet, and the flat side of the first filler is filled in the second mirror sheet is superposed Align to abut The spatial image display device according to claim 1, wherein The first mirror sheet and the second mirror sheet are respectively
2. The spatial image display device according to claim 1, wherein a second filler, which is a black resin or an adhesive, is filled in the gap portion of the longitudinal member.

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