JPWO2017146016A1 - Imaging element - Google Patents

Abstract

  The imaging element (1A) includes a first reflecting element (10) arranged on the first main surface (1a) side and a second reflecting element (20) arranged on the second main surface (1b) side. Prepare. The first reflective element (10) includes a first reflector (11) arranged in parallel to each other, and a first transparent body (12) filling between adjacent first reflectors (11). The reflective element (20) includes a second reflector (21) arranged in parallel to each other and a second transparent body (22) filling between the adjacent second reflectors (21). The first reflector (11) and the second reflector (21) are arranged orthogonally. By disposing at least one spacer (40A) in a part of the space (S) between the first reflective element (10) and the second reflective element (20), the first reflective element ( 10) and the second reflective element (20) are spaced apart from each other, and the spacer (40A) in the space (S) between the first reflective element (10) and the second reflective element (20). An air layer (4) is formed in a portion where no) is arranged.

Description

  The present invention relates to an imaging element used in an aerial image display device that can display an aerial image. More specifically, the present invention relates to a real image of an object arranged at a spatial position on one main surface side on the other main surface side. The present invention relates to an imaging element that forms an image at a spatial position.

  Conventionally, as an imaging element used in an aerial image display device, an element generally called a two-plane corner reflector array element has been used. As a two-sided corner reflector array element, two flat reflection elements in which a plurality of reflectors are laminated via a transparent body in a direction perpendicular to the main surface are used, and these two reflection elements are laminated on each other. In some cases, the layers are stacked in the thickness direction so that the directions are orthogonal to each other.

  In this type of two-surface corner reflector array element, as disclosed in, for example, International Publication No. 2009/131128 (Patent Document 1), Japanese Patent Application Laid-Open No. 2012-128456 (Patent Document 2), etc. Are generally joined using a light-transmitting adhesive. In addition, International Publication No. 2009/131128 discloses that in addition to bonding with an adhesive, sealing fixing by heat sealing or fixing by screwing can be used.

International Publication No. 2009/131128 JP 2012-128456 A

  In the two-surface corner reflector array element formed by superimposing the two reflecting elements described above, a plurality of reflecting surfaces included in one reflecting element (that is, the surface of the reflecting member facing the adjacent transparent body) and the other The reflecting elements are positioned and fixed with high accuracy so that the reflecting surfaces included in the reflecting element are orthogonal to each other and the overlapping reflecting elements are arranged in parallel to each other. is necessary.

  If this positioning is insufficient, the light incident on the two-sided corner reflector array element is not ideally retroreflected by the two-sided corner reflector array element, and the light is emitted from one point of the object in a different direction. The light does not converge to one point at the imaging position. As a result, the aerial image is blurred or distorted, resulting in a problem that display quality is greatly reduced.

  Here, when the two reflective elements are joined by an adhesive, it is difficult to uniformly manage the thickness of the adhesive to be applied during the application of the adhesive, and the progress of curing of the applied adhesive throughout the area is difficult. It is also difficult to manage uniformly, and as a result, uneven thickness and shrinkage of the adhesive occur, resulting in distortion of the adhesive surface. This distortion of the adhesive surface causes the positional relationship of the reflection surfaces described above to be lost.

  In addition, when two reflective elements are joined by an adhesive, there is a possibility that bubbles may be caught inside the adhesive when the adhesive is applied, and the adhesive remains with the bubbles remaining inside the adhesive. When is hardened, light is scattered by the light hitting the bubbles, which may cause image defects in the aerial image.

  On the other hand, when the two reflecting elements are closely fixed without interposing other members (for example, when fixing by heat sealing or fixing by screwing), the positioning accuracy described above is considerably high. Although it can be ensured, interference fringes (so-called Newton's rings) are likely to occur, and a problem arises in that the quality of the aerial image is deteriorated when it overlaps the aerial image and enters the field of view.

  Accordingly, the present invention has been made to solve the above-described problems, and an object thereof is to provide an imaging element that can display a high-quality aerial image.

  An imaging element according to the present invention has a first main surface and a second main surface that are positioned relative to each other in the thickness direction, and a real image of an object disposed at a spatial position on the first main surface side is the second main surface. An image is formed at a spatial position on the main surface side, and is a flat plate-like first reflecting element arranged on the first main surface side and a flat plate-like second reflection arranged on the second main surface side. Device. The first reflective element includes a plurality of first reflectors arranged in parallel to each other so as to be aligned along a first direction orthogonal to the thickness direction, and an adjacent first of the plurality of first reflectors. A plurality of first transparent bodies filling between the reflectors. The second reflecting element includes a plurality of second reflectors arranged in parallel to each other so as to be aligned along a second direction orthogonal to both the thickness direction and the first direction, and the plurality of second reflectors. And a plurality of second transparent bodies filling between adjacent second reflectors. In the imaging element according to the present invention, at least one or more spacers are disposed in a part of the space between the first reflective element and the second reflective element, thereby the first reflective element. An element and the second reflective element are spaced apart from each other, and an air layer is formed in a portion of the space between the first reflective element and the second reflective element where the spacer is not disposed. Is formed.

  According to the present invention, it is possible to provide an imaging element capable of displaying a high-quality aerial image.

1 is a schematic plan view of an imaging element in Embodiment 1 of the present invention. It is a schematic cross section along the II-II line shown in FIG. It is a disassembled perspective view of the principal part of the imaging element shown in FIG. FIG. 2 is a schematic plan view of the imaging element shown in FIG. 1 with a frame-like frame and a second reflecting element removed. It is the schematic cross section which expanded the principal part of the imaging element shown in FIG. It is a conceptual diagram which shows the mechanism in which an aerial image | video is displayed by using the imaging element shown in FIG. It is a schematic cross section of the imaging element in Embodiment 2 of the present invention. It is a schematic cross section of the imaging element in Embodiment 3 of this invention. It is a schematic top view in the state which removed the frame-shaped frame and 2nd reflective element of the image formation element in Embodiment 4 of this invention. It is the schematic cross section which expanded the principal part of the image formation element in Embodiment 4 of this invention. It is a schematic plan view in the state which removed the frame-shaped frame and 2nd reflective element of the image formation element in Embodiment 5 of this invention. It is a schematic plan view in the state which removed the frame-shaped frame and 2nd reflective element of the image formation element in Embodiment 6 of this invention. It is the schematic cross section which expanded the principal part of the image formation element in Embodiment 6 of this invention. It is a schematic plan view in the state which removed the frame-shaped frame and 2nd reflective element of the image formation element in Embodiment 7 of this invention. It is the schematic cross section which expanded the principal part of the image formation element in Embodiment 7 of this invention. It is a schematic plan view in the state which removed the frame-shaped frame of the image formation element in Embodiment 8 of this invention. FIG. 17 is a schematic cross-sectional view in which a main part of the imaging element shown in FIG. 16 is enlarged. It is an exploded view of the 1st reflective element of the image formation element shown in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiments, the same or common parts are denoted by the same reference numerals in the drawings, and description thereof will not be repeated.

(Embodiment 1)
FIG. 1 is a schematic plan view of an imaging element according to Embodiment 1 of the present invention, and FIG. 2 is a schematic cross-sectional view of the imaging element shown in FIG. 1 along the line II-II shown in FIG. It is. FIG. 3 is an exploded perspective view of a main part of the imaging element shown in FIG. 4 is a schematic plan view of the imaging element shown in FIG. 1 with the frame-like frame and the second reflecting element removed, and FIG. 5 is an enlarged view of the main part of the imaging element shown in FIG. FIG. 5 is a schematic cross-sectional view taken along line VV shown in FIG. 4. First, the configuration of the imaging element 1A in the present embodiment will be described with reference to FIGS.

  As shown in FIGS. 1 to 5, an imaging element (generally referred to as a “two-sided corner reflector array element” or “micromirror array element”) 1A has a substantially flat plate shape as a whole. The 1st reflective element 10, the 2nd reflective element 20, the frame-shaped frame 30, and the some flat spacer 40A are provided.

  The 1st reflective element 10 consists of a flat member which has the outer side main surface 10a and the inner side main surface 10b which are located in the thickness direction, and has a square shape, when it sees along a thickness direction. The first reflecting element 10 includes a plurality of first reflectors 11 and a plurality of first transparent bodies 12, and the plurality of first reflectors 11 and the plurality of first transparent bodies 12 have the above thickness. The layers are alternately stacked in a first direction (a direction connecting the lower left side and the upper right side in FIG. 1) orthogonal to the direction. In addition, in FIG. 1, the 1st reflector 11 is shown with the broken line.

  The first reflector 11 includes a pair of reflective films (not shown) and an adhesive layer 11b (only the adhesive layer 11b appears in FIG. 5) located between the pair of reflective films. The pair of reflective films and the adhesive layer 11b are arranged side by side along the first direction, and the pair of reflective films are joined by directly contacting both side surfaces of the adhesive layer 11b. In addition, the structure of the 1st reflector 11 which consists of a pair of these reflecting films and the contact bonding layer 11b is the same as that of the structure of the 2nd reflector 21 mentioned later.

  The plurality of first reflectors 11 are arranged in parallel to each other, and each of them connects a second direction (the upper left side and the lower right side in FIG. 1) perpendicular to both the thickness direction and the first direction. Direction). The plurality of first transparent bodies 12 are arranged in parallel to each other so as to fill the space between the adjacent first reflectors 11, and each of them extends along the second direction.

  The pair of reflective films are made of, for example, a metal such as aluminum or silver, and the adhesive layer 11b is made of, for example, a cured product of an epoxy adhesive. Moreover, the 1st transparent body 12 is comprised, for example with glass or transparent resin.

  The width that is the size in the first direction of each reflective film is, for example, about 50 [nm] to 200 [nm], and the width that is the size in the first direction of each adhesive layer 11b is For example, it is about 5 [μm] or more and 30 [μm] or less. Therefore, the width, which is the size of each first reflector 11 in the first direction, is approximately the same as the width of each adhesive layer 11b. Moreover, the width which is the magnitude | size in the said 1st direction of each 1st transparent body 12 is about 300 [micrometers] or more and 2000 [micrometers] or less, for example.

  Here, the cross-sectional shape orthogonal to the extending direction (that is, the second direction) of each of the plurality of first reflectors 11 and each of the plurality of first transparent bodies 12 is excluding both ends in the extending direction. It is rectangular. Thus, the plurality of first reflectors 11 and the plurality of first transparent bodies 12 are arranged in close contact with each other in the first direction, so that the first reflective element 10 has a flat plate shape as described above. have.

  The thickness of the first reflective element 10 is, for example, about 900 [μm] to 6000 [μm], and the length of one side orthogonal to the thickness direction of the first reflective element 10 is, for example, 10 [cm] to 100 [Cm] or less.

  By having the said structure, the 1st reflective element 10 has a some reflective surface in the inside. Each of the plurality of reflective surfaces is the surface of the first reflector 11 in the portion facing the adjacent first transparent body 12 (that is, the surface of the portion of the reflective film facing the first transparent body 12). Thus, two reflecting surfaces facing in opposite directions are formed for each first reflector 11.

  The 2nd reflective element 20 consists of a flat member which has the outer side main surface 20a and the inner side main surface 20b which are located in the thickness direction oppositely, and was seen along the thickness direction with the same thickness as the 1st reflective element 10. In some cases, it has a square shape the same size as the first reflective element 10. The second reflecting element 20 includes a plurality of second reflectors 21 and a plurality of second transparent bodies 22, and the plurality of second reflectors 21 and the plurality of second transparent bodies 22 are the above-mentioned first reflectors. They are alternately stacked in two directions (the direction connecting the upper left side and the lower right side in FIG. 1). In FIG. 4, the second reflector 21 is indicated by a two-dot chain line.

  As shown in FIG. 5, the second reflector 21 includes a pair of reflective films 21a and an adhesive layer 21b positioned between the pair of reflective films 21a. The pair of reflective films 21a and the adhesive layer 21b are arranged side by side along the second direction, and the pair of reflective films 21a are joined by being in direct contact with both side surfaces of the adhesive layer 21b.

  As shown in FIGS. 1 to 5, the plurality of second reflectors 21 are arranged in parallel to each other, and each of them is in the first direction (the direction connecting the lower left side and the upper right side in FIG. 1). Extending along. The plurality of second transparent bodies 22 are arranged in parallel to each other so as to fill the space between the adjacent second reflectors 21, and each of them extends along the first direction.

  The pair of reflective films 21a is made of, for example, a metal such as aluminum or silver, and the adhesive layer 21b is made of, for example, a cured product of an epoxy adhesive. Moreover, the 2nd transparent body 22 is comprised, for example with glass or transparent resin.

  The width of each reflective film 21a in the second direction is, for example, about 50 [nm] to 200 [nm], and the width of each adhesive layer 21b in the second direction is, for example, For example, it is about 5 [μm] or more and 30 [μm] or less. Accordingly, the width of each second reflector 21 in the second direction is approximately the same as the width of each adhesive layer 21b. Moreover, the width which is the magnitude | size in the said 2nd direction of each 2nd transparent body 22 is about 300 [micrometers] or more and 2000 [micrometers] or less, for example.

  Here, the cross-sectional shape orthogonal to the extending direction of each of the plurality of second reflectors 21 and each of the plurality of second transparent bodies 22 (that is, the first direction) excludes both end portions in the extending direction. It is rectangular. Accordingly, the plurality of second reflectors 21 and the plurality of second transparent bodies 22 are arranged in close contact with each other in the second direction, so that the second reflective element 20 has a flat plate shape as described above. have.

  By having the said structure, the 2nd reflective element 20 has a some reflective surface in the inside. Each of the plurality of reflective surfaces is on the surface of the second reflector 21 in the portion facing the adjacent second transparent body 22 (that is, the surface of the portion of the reflective film 21a facing the second transparent body 22). Thus, two reflecting surfaces facing in opposite directions are formed for each second reflector 21.

  The 1st reflective element 10 and the 2nd reflective element 20 of the structure demonstrated above can be manufactured, for example with the following method.

  First, a plurality of flat transparent members are prepared, and coating layers are formed on both main surfaces thereof. Here, a transparent member becomes the 1st transparent body 12 or the 2nd transparent body 22 mentioned above, For example, glass or transparent resin can be utilized suitably. The coating layer is to be the pair of reflective films of the first reflector 11 or the pair of reflective films 21a of the second reflector 21 described above, and is made of, for example, an aluminum film or a silver film. The coating film can be formed by sputtering, for example.

  Next, for example, an epoxy adhesive is applied to one exposed surface (that is, the surface of one coating layer) of the transparent member whose both main surfaces are covered with the coating layer, and the transparent member is coated with the adhesive. Another transparent member is superimposed on the adhesive to cure the adhesive. As a result, the two transparent members that are overlaid are pasted together. Here, the cured adhesive becomes the adhesive layer 11b of the first reflector 11 or the adhesive layer 21b of the second reflector 21 described above.

  By repeating this bonding operation as many times as necessary, a laminated body block is formed in which a plurality of transparent members whose both main surfaces are covered with a coating layer are laminated via an adhesive.

  Next, a laminated body block is cut | disconnected sequentially in multiple times along the direction orthogonal to the lamination direction of a transparent member. At that time, each member cut and separated into pieces by thinly cutting the outer shape of the member cut out from the laminate block into a flat plate shape, the first reflecting element 10 and the second reflecting member described above. Element 20 is formed. For cutting the laminate block, for example, wire cutting can be used, and the surface of each member cut out after cutting may be polished.

  As described above, the first reflective element 10 and the second reflective element 20 having the above-described configuration are manufactured. The first reflective element 10 and the second reflective element 20 have the same structure, although they are different in direction after being assembled as the imaging element 1A.

  As shown in FIG. 2, the first reflecting element 10 and the second reflecting element 20 are arranged so that the inner main surfaces 10 b and 20 b face each other, and are thereby overlapped in the thickness direction. As a result, the first main surface 1a of the imaging element 1A is constituted by the outer main surface 10a of the first reflecting element 10, and the second main surface of the imaging element 1A is formed by the outer main surface 20a of the second reflecting element 20. 1b is configured.

  Here, the 1st reflective element 10 and the 2nd reflective element 20 are piled up so that the 1st reflector 11 and the 2nd reflector 21 which are contained in each may orthogonally cross mutually, and it is opposingly arranged. As a result, a large number of minute corner reflectors are arranged in an array in the imaging element 1A.

  As shown in FIGS. 2 to 4, a plurality of flat spacers 40 </ b> A are sandwiched between predetermined positions between the first reflective element 10 and the second reflective element 20. Each of the plurality of flat spacers 40A is made of, for example, metal or resin, and preferably made of stainless steel.

  The plurality of plate-like spacers 40A are used to arrange the first reflective element 10 and the second reflective element 20 at a distance from each other while ensuring the parallelism between the first reflective element 10 and the second reflective element 20. Is. Therefore, the thicknesses of the individual flat spacers 40A are configured to be equal to each other, for example, 10 [μm] or more and 1000 [μm] or less.

  Here, as shown in FIGS. 2 to 4, the first reflecting element 10 and the second reflecting element 20 are exposed without being covered by the frame-like frame 30 in relation to the frame-like frame 30 described later. Thus, each of the outer peripheral regions 3 that have an image formation contributing region 2 that contributes to the image formation of the aerial image and that does not contribute to the image formation of the aerial image by being covered by the frame 30. It has in the outer peripheral part surrounding the center part.

  The flat spacer 40 </ b> A is disposed between the outer peripheral region 3 of the first reflective element 10 and the outer peripheral region 3 of the second reflective element 20. More specifically, the flat spacer 40A includes an L-shape in plan view and an I-shape in plan view, and the L-shape in plan view includes the first reflective element 10 and the first reflective element 10A. The two reflection elements 20 are arranged at the corner positions, and the remaining I-shaped element in plan view is arranged at the center position that is the middle position of the side.

  As a result, as shown in FIGS. 2 and 5, by arranging the flat spacer 40A, the first reflective element 10 and the second reflective element 20 that are arranged at a distance in the thickness direction are provided with a first spacer 40A. An internal space S sandwiched between the imaging contribution region 2 of the first reflective element 10 and the imaging contribution region 2 of the second reflective element 20 is formed, and the air layer 4 is formed by the internal space S. It will be.

  As shown in FIG. 2, the first reflective element 10 and the second reflective element 20 that are opposed to each other at a distance by a plurality of flat spacers 40 </ b> A are held by a frame-shaped frame 30. The frame-shaped frame 30 has a frame shape in plan view, and the first reflective element 10 and the second reflective element are sandwiched between the outer edge of the first reflective element 10 and the outer edge of the second reflective element 20. 20 is held.

  More specifically, the frame-shaped frame 30 is formed on a portion corresponding to the outer peripheral region 3 of the outer main surface 10a of the first reflective element 10 and an outer peripheral region 3 of the outer main surface 20a of the second reflective element 20. It has a shape that covers the corresponding portion and the end face of the first reflecting element 10 and the end face of the second reflecting element 20, and the first reflecting element 10 and the second reflecting element 20 that are arranged to face each other from the outside. The first reflection element 10 and the second reflection element 20 are held by being fitted.

  Here, a cushioning material 31 made of sponge or rubber is located inside the frame-shaped frame 30, and the end portions of the first reflecting element 10 and the second reflecting element 20 that are arranged to face each other are disposed on the cushioning material 31. It is held by being pinched by. Note that the frame-like frame 30 is made of, for example, metal or resin, and preferably made of stainless steel.

  FIG. 6 is a conceptual diagram showing a mechanism for displaying an aerial image by using the imaging element shown in FIG. Next, with reference to FIG. 6, a description will be given of a mechanism in which an aerial image can be displayed by using the imaging element 1A in the present embodiment.

  As shown in FIG. 6, in order to display an aerial image using the imaging element 1A in the present embodiment, an object 100 as a projection object is placed at a spatial position on the first main surface 1a side of the imaging element 1A. Is placed.

  The light emitted from the object 100 in different directions enters the first reflecting element 10 via the first main surface 1a of the imaging element 1A (the outer main surface 10a of the first reflecting element 10), and the light The light is reflected by the reflecting surface of the first reflector 11 located in the traveling direction, and reaches the air layer 4 via the inner main surface 10 b of the first reflecting element 10.

  The light that has passed through the air layer 4 enters the second reflective element 20 via the inner main surface 20b of the second reflective element 20, and is reflected by the reflective surface of the second reflector 21 that is positioned in the traveling direction of the light. It is reflected and reaches the outside of the imaging element 1A via the second main surface 1b of the imaging element 1A (the outer main surface 20a of the second reflecting element 20).

  The light emitted to the outside of the imaging element 1A is reflected at the symmetrical position of the object 100 with respect to the plane on which the imaging element 1A is arranged by the retroreflection at the first reflecting element 10 and the second reflecting element 20 described above. As a result, the real image 200 of the object 100 is imaged at a spatial position on the second main surface 1b side of the imaging element 1A.

  For example, when a liquid crystal display is disposed as the object 100, an image displayed on the liquid crystal display is displayed as an aerial image. Of course, the object 100 is not limited to a liquid crystal display, and any object may be arranged regardless of two-dimensional or three-dimensional types.

  As described above, in the imaging element 1A according to the present embodiment, a plurality of flat spacers 40A are provided in a part of the space between the first reflecting element 10 and the second reflecting element 20. By being disposed, the first reflective element 10 and the second reflective element 20 are disposed with a distance therebetween, and a flat plate shape in the space between the first reflective element 10 and the second reflective element 20. An air layer 4 is formed in a portion where the spacer 40A is not disposed.

  Therefore, by adopting the above configuration, the first reflective element 10 and the second reflective element 20 can be positioned with high positioning accuracy compared to the case where an adhesive is used for joining the first reflective element 10 and the second reflective element 20. Can be fixed. In other words, since there is no occurrence of uneven thickness or shrinkage of the adhesive that may occur when the first reflective element 10 and the second reflective element 20 are bonded using an adhesive, the first reflective element 10 and It becomes possible to arrange | position the 2nd reflective element 20 with high parallelism. As a result, it is possible to display an aerial image with high quality.

  In addition, by adopting the above configuration, the first reflective element 10 and the second reflective element are compared with the case where the first reflective element 10 and the second reflective element 20 are fixed in close contact without using other members. Since the air layer 4 is formed between the air layer 4 and the air layer 4, the generation of interference fringes (so-called Newton rings) can be suppressed. In this sense, the aerial image is displayed with high quality. It becomes possible.

  Furthermore, by adopting the above-described configuration, the quality of the aerial image due to bubbles that may be generated when the first reflective element 10 and the second reflective element 20 are bonded using an adhesive, or the first reflective The yield does not decrease due to the deterioration of the quality of the aerial image due to the mixing of foreign matters that may occur when the element 10 and the second reflecting element 20 are fixed in close contact with each other without any other member. Therefore, it can be set as the fixing method which can suppress degradation of the quality of the aerial image, which is more advantageous than these fixing methods.

  Thus, by using the imaging element 1A in the present embodiment, it is possible to provide an imaging element that can display a higher-quality aerial image as compared with the conventional imaging element 1A. By using the conventional aerial image display device, it is possible to display a high-quality aerial image.

(Embodiment 2)
FIG. 7 is a schematic cross-sectional view of the imaging element according to Embodiment 2 of the present invention. Hereinafter, with reference to FIG. 7, imaging element 1B in the present embodiment will be described.

  As shown in FIG. 7, the imaging element 1B in the present embodiment is further provided with a pair of protective members 50A and 50B when compared with the imaging element 1A in the first embodiment described above. The configuration is mainly different.

  Specifically, each of the pair of protective members 50A and 50B is configured by a transparent flat plate-like member, and for example, glass or transparent resin can be suitably used. One protective member 50A is disposed at a position on the outer main surface 10a side of the first reflective element 10, and the other protective member 50B is disposed at a position on the outer main surface 20a side of the second reflective element 20. Yes. Thereby, the 1st reflective element 10 and the 2nd reflective element 20 are covered with these pair of protection members 50A and 50B.

  The pair of protection members 50 </ b> A and 50 </ b> B are held by the frame-shaped frame 30. More specifically, the frame-shaped frame 30 is configured in multiple stages so as to sandwich not only the outer edge of the first reflecting element 10 and the outer edge of the second reflecting element 20, but also the outer edges of the pair of protective members 50A and 50B. Thus, the first reflecting element 10, the second reflecting element 20, and the pair of protective members 50A and 50B are held.

  The pair of protection members 50A and 50B are for preventing direct access to the first reflective element 10 and the second reflective element 20 from the outside, and thereby the first reflective element 10 and the second reflective element. 20 breakage and contamination can be prevented.

  Therefore, by adopting the above-described configuration, in addition to the effect in the first embodiment described above, it is possible to obtain an effect that can prevent damage and contamination of the first reflective element 10 and the second reflective element 20.

  From the viewpoint of suppressing the generation of interference fringes, a gap is preferably provided between the first reflective element 10 and the protective member 50A. Similarly, the second reflective element 20 and the protective member 50B It is preferable that a gap is provided between them.

(Embodiment 3)
FIG. 8 is a schematic cross-sectional view of the imaging element according to Embodiment 3 of the present invention. Hereinafter, the imaging element 1 </ b> C in the present embodiment will be described with reference to FIG. 8.

  As shown in FIG. 8, in the imaging element 1 </ b> C in the present embodiment, when compared with the imaging element 1 </ b> A in the first embodiment described above, the flat spacer 40 </ b> A is replaced by a part of the frame-shaped frame 30. In that respect, the configuration is mainly different.

  Specifically, the frame-like frame 30 is provided with a spacer portion 30a having a flat plate shape from a predetermined position on the inside thereof, and the spacer portion 30a corresponds to the outer peripheral region 3 of the first reflective element 10 and the spacer portion 30a. The second reflective element 20 is configured to be sandwiched between the outer peripheral regions 3.

  Even in such a configuration, the first reflective element 10 and the second reflective element 20 are spaced apart by the spacer portion 30a of the frame-shaped frame 30, and the first reflective element 10 and the first reflective element 10 are separated from each other. The air layer 4 is formed in a portion of the space between the two reflecting elements 20 where the spacer portion 30a is not disposed.

  Therefore, by adopting the above configuration, the same effect as the effect in the first embodiment described above can be obtained, and an imaging element capable of displaying a high-quality aerial image as compared with the conventional one is obtained. be able to.

(Embodiment 4)
FIG. 9 is a schematic plan view of the imaging element according to Embodiment 4 of the present invention with the frame-like frame and the second reflecting element removed, and FIG. 10 is a main portion of the imaging element according to this embodiment. FIG. 10 is a schematic cross-sectional view taken along line XX shown in FIG. Hereinafter, with reference to these FIG. 9 and FIG. 10, the imaging element 1D in the present embodiment will be described.

  As shown in FIGS. 9 and 10, the imaging element 1D according to the present embodiment has a plurality of flat plate-like spacers 40A having a plurality of parts when compared with the imaging element 1A according to the first embodiment described above. And the internal space in which the plurality of wire spacers 40B are sandwiched between the imaging contribution region 2 of the first reflective element 10 and the imaging contribution region 2 of the second reflective element 20. The configuration is mainly different in that it is also located in a part of S.

  Specifically, each of the plurality of wire spacers 40B passes through the internal space S described above from a predetermined position on the outer edge of the first reflective element 10 and the second reflective element 20, and the first reflective element 10 and the second reflective element. It is stretched to reach another predetermined position of the outer edge of the element 20. More specifically, in the present embodiment, a total of three wire spacers 40B are provided.

  One of the wire spacers 40B is stretched so as to connect a pair of diagonal positions of the first reflective element 10 and the second reflective element 20, and the remaining two wire spacers 40B are each one of the above-described ones. From the middle position of one side of the first reflecting element 10 and the second reflecting element 20 to be parallel to one wire spacer 40B stretched so as to connect the diagonal positions of the set, other adjacent to the one side It is stretched to reach the middle position on one side. In addition, the flat spacer 40A is arrange | positioned in each of the corner | angular part in a set of diagonal position which is different from a set of diagonal positions where the said wire spacer 40B was stretched | stretched.

  As with the flat spacer 40A, these wire spacers 40B secure the parallelism between the first reflective element 10 and the second reflective element 20 while maintaining a distance between the first reflective element 10 and the second reflective element 20. It is for arranging at a distance. For this reason, the diameters (thicknesses) of the individual wire spacers 40B are configured to be equal to each other, and are further the same as the thickness of the flat plate spacer 40A. Here, the diameter of each wire spacer 40B is, for example, not less than 10 [μm] and not more than 1000 [μm]. The wire spacer 40B is made of, for example, a metal or resin wire, and a stainless steel wire can be preferably used.

  Even in this configuration, the first reflective element 10 and the second reflective element 20 are spaced apart by the flat spacer 40A and the wire spacer 40B, and the first reflective element 10 and The air layer 4 is formed in a portion where the flat spacer 40A and the wire spacer 40B are not arranged in the space between the second reflective element 20.

  Therefore, by adopting the above configuration, the same effect as the effect in the first embodiment described above can be obtained, and an imaging element capable of displaying a high-quality aerial image as compared with the conventional one is obtained. be able to.

  Furthermore, by adopting the above configuration, not only between the outer peripheral region 3 of the first reflective element 10 and the outer peripheral region 3 of the second reflective element 20, but also the imaging contribution region 2 of the first reflective element 10 and the first Since the spacer is also located between the imaging contribution region 2 of the two reflecting elements 20, it is possible to suppress the occurrence of bending in the first reflecting element 10 and the second reflecting element 20. Therefore, the parallelism between the first reflective element 10 and the second reflective element 20 can be ensured more reliably, and a higher quality aerial image can be displayed.

  Here, as shown in FIGS. 9 and 10, each of the three wire spacers 40 </ b> B is disposed so as to extend along the extending direction of the second reflector 21 included in the second reflecting element 20. Furthermore, it is preferable that the second reflector 21 is disposed so as to overlap when viewed in the thickness direction.

  Furthermore, each of the three wire spacers 40 </ b> B is disposed on either the first transparent body 12 of the first reflective element 10 or the second transparent body 22 of the second reflective element 20 when viewed along the thickness direction. It is preferable that they are arranged so as not to overlap. In order to configure in this way, a wire spacer having a diameter smaller than the width of the second reflector 21 may be used as the wire spacer 40B. For example, when the width of the second reflector 21 is 0.03 [μm], a stainless steel wire having a diameter of 0.02 [μm] may be used as the wire spacer 40B.

  With such a configuration, when the wire spacer 40B is located in a part of the internal space S sandwiched between the imaging contribution region 2 of the first reflection element 10 and the imaging contribution region 2 of the second reflection element 20 Even so, since the wire spacer 40B does not block the optical path of the light contributing to the image formation, it is possible to prevent the deterioration of the quality of the real image of the imaged object.

  Further, with this configuration, when the imaging element 1D is viewed from the second main surface 1b side, the wire spacer 40B is invisible or inconspicuous, so that the image is formed by the imaging element 1D. Even when a real image of an object is visually recognized, it is possible to prevent the eyes from focusing on the imaging element 1D located on the rear side of the real image, and the real image can be more easily recognized.

  In the present embodiment, the case where the wire spacer 40B is extended along the direction in which the second reflector 21 of the second reflective element 20 extends has been described as an example. It is good also as extending along the direction where the 1st reflector 11 of 1 reflective element 10 extends. In that case, when the imaging element is viewed from the second main surface 1b side, the wire spacer 40B will be visible, but this can be obtained for other effects.

(Embodiment 5)
FIG. 11 is a schematic plan view of the imaging element according to Embodiment 5 of the present invention with the frame-like frame and the second reflecting element removed. Hereinafter, the imaging element 1E in the present embodiment will be described with reference to FIG.

  As shown in FIG. 11, the imaging element 1 </ b> E in the present embodiment has a plurality of wire spacers 40 </ b> B formed by the first reflecting element 10 when compared with the imaging element 1 </ b> A in the first embodiment described above. The configuration is different only in that it is further provided in a part of the internal space S sandwiched between the contribution region 2 and the imaging contribution region 2 of the second reflecting element 20.

  Specifically, the plurality of wire spacers 40B are illustrated at a predetermined position in the internal space S sandwiched between the imaging contribution region 2 of the first reflection element 10 and the imaging contribution region 2 of the second reflection element 20, for example. Are arranged in an array. The wire spacer 40B has the same configuration as that of the wire spacer 40B described in the fourth embodiment, except that the length is short.

  Even in such a configuration, it is possible to obtain substantially the same effect as that described in the fourth embodiment. Even in this case, each of the wire spacers 40B arranged in an array may be arranged so as to extend along the direction in which the second reflector 21 included in the second reflective element 20 extends. Preferably, it is preferably arranged so as to overlap the second reflector 21 when viewed along the thickness direction, and further, when viewed along the thickness direction, It is preferable that the first transparent body 12 and the second transparent body 22 of the second reflective element 20 are disposed so as not to overlap with each other.

(Embodiment 6)
FIG. 12 is a schematic plan view of the imaging element according to Embodiment 6 of the present invention with the frame-like frame and the second reflecting element removed, and FIG. 13 shows the main part of the imaging element according to this embodiment. FIG. 13 is a schematic cross-sectional view taken along line XIII-XIII shown in FIG. Hereinafter, with reference to FIG. 12 and FIG. 13, the imaging element 1F in the present embodiment will be described.

  As shown in FIGS. 12 and 13, the imaging element 1F in the present embodiment has a plurality of plate-like spacers 40A as ink portions when compared with the imaging element 1A in the first embodiment described above. The internal space in which the plurality of ink spacers 40C are replaced by the plurality of ink spacers 40C and the plurality of ink spacers 40C are sandwiched between the imaging contribution region 2 of the first reflective element 10 and the imaging contribution region 2 of the second reflective element 20 The configuration is mainly different in that it is further provided in a part of S.

  Specifically, each of the plurality of ink spacers 40 </ b> C is provided in a spot shape at a predetermined position on the inner main surface 10 b of the first reflective element 10. The ink spacer 40 </ b> C can be formed, for example, by printing ink on the inner main surface 10 b of the first reflective element 10.

  A part of the plurality of ink spacers 40C is arranged in a dot array between the outer peripheral region 3 of the first reflective element 10 and the outer peripheral region 3 of the second reflective element 20, and the rest of the plurality of ink spacers 40C is the rest. In an inner space S sandwiched between the imaging contribution region 2 of the first reflection element 10 and the imaging contribution region 2 of the second reflection element 20, they are arranged in an array as shown in the figure, for example.

  These ink spacers 40C are for arranging the first reflective element 10 and the second reflective element 20 at a distance from each other while ensuring the parallelism between the first reflective element 10 and the second reflective element 20. is there. For this reason, the thicknesses of the individual ink spacers 40C are configured to be equal to each other, for example, 10 [μm] or more and 1000 [μm] or less.

  Even in such a configuration, the first reflective element 10 and the second reflective element 20 are spaced apart by the ink spacer 40C, and the first reflective element 10 and the second reflective element 20 are separated from each other. The air layer 4 is formed in a portion of the space between which the ink spacer 40C is not disposed.

  Therefore, by adopting the above configuration, the same effect as the effect in the first embodiment described above can be obtained, and an imaging element capable of displaying a high-quality aerial image as compared with the conventional one is obtained. be able to.

  Furthermore, by adopting the above configuration, not only between the outer peripheral region 3 of the first reflective element 10 and the outer peripheral region 3 of the second reflective element 20, but also the imaging contribution region 2 of the first reflective element 10 and the first Since the spacer is also located between the imaging contribution region 2 of the two reflecting elements 20, it is possible to suppress the occurrence of bending in the first reflecting element 10 and the second reflecting element 20. Therefore, the parallelism between the first reflective element 10 and the second reflective element 20 can be ensured more reliably, and a higher quality aerial image can be displayed.

  Here, as shown in FIGS. 12 and 13, each of the ink spacers 40 </ b> C is preferably disposed so as to overlap the second reflector 21 when viewed in the thickness direction. The width of the second reflector 21 is, for example, 0.03 [μm], and the diameter of the ink spacer 40C in a plan view is, for example, 0.04 [μm].

  With such a configuration, when the ink spacer 40C is located in a part of the internal space S sandwiched between the imaging contribution region 2 of the first reflection element 10 and the imaging contribution region 2 of the second reflection element 20. Even so, since the ink spacer 40C can be prevented from blocking the optical path of the light contributing to the image formation, it is possible to prevent the deterioration of the quality of the real image of the imaged object.

  Furthermore, with this configuration, when the imaging element 1F is viewed from the second main surface 1b side, the ink spacer 40C becomes inconspicuous, so that a real image of the object imaged by the imaging element 1F can be obtained. Even when it is visually recognized, it is possible to prevent the eye from being focused on the imaging element 1F located on the rear side of the real image, and the real image can be visually recognized more easily.

  In addition, when the size of the ink spacer 40C is configured to be smaller than the width of the second reflector 21, the ink spacer 40C can be configured not to protrude from the second reflector 21, and the above-described effects. Can be further increased.

  In the present embodiment, the case where the ink spacer 40C is provided on the inner main surface 10b of the first reflective element 10 has been described as an example. However, the ink spacer 40C is disposed on the inner side of the second reflective element 20. It may be provided on the main surface 20b.

(Embodiment 7)
FIG. 14 is a schematic plan view of the imaging element according to Embodiment 7 of the present invention with the frame-like frame and the second reflecting element removed, and FIG. 15 shows the main part of the imaging element according to this embodiment. FIG. 15 is a schematic cross-sectional view taken along line XV-XV shown in FIG. Hereinafter, the imaging element 1G in the present embodiment will be described with reference to FIGS.

  As shown in FIGS. 14 and 15, the imaging element 1G in the present embodiment has a plurality of transparent film spacers 40D as the first reflecting element when compared with the imaging element 1A in the first embodiment described above. The configuration is different only in that it is further provided in a part of the internal space S sandwiched between the ten imaging contribution regions 2 and the imaging contribution region 2 of the second reflecting element 20.

  Specifically, each of the plurality of transparent film spacers 40D is located at a predetermined position in the internal space S sandwiched between the imaging contribution region 2 of the first reflection element 10 and the imaging contribution region 2 of the second reflection element 20. For example, they are arranged in an array as shown in the figure. Each of the transparent film spacers 40D has a transparent substrate and a transparent adhesive layer provided on one surface of the substrate, and the inside of the first reflective element 10 via the adhesive layer. It is affixed to the main surface 10b.

  These transparent film spacers 40D are for arranging the first reflective element 10 and the second reflective element 20 at a distance from each other while ensuring the parallelism between the first reflective element 10 and the second reflective element 20. It is. For this reason, the thicknesses of the individual transparent film spacers 40D are configured to be equal to each other, for example, 10 [μm] or more and 1000 [μm] or less.

  Even in such a configuration, the first reflective element 10 and the second reflective element 20 are spaced apart from each other by the transparent film spacer 40D, and the first reflective element 10 and the second reflective element 20 are disposed. The air layer 4 is formed in a portion where the transparent film spacer 40D is not disposed in the space between the two.

  Therefore, by adopting the above configuration, the same effect as the effect in the first embodiment described above can be obtained, and an imaging element capable of displaying a high-quality aerial image as compared with the conventional one is obtained. be able to.

  Here, when the above configuration is adopted, there is a possibility that interference fringes may occur due to the direct contact between the transparent film spacer 40D and the inner main surface 20b of the second reflective element 20, but the transparent film spacer 40D is sufficient. In addition, when the interference fringes are generated, the interference fringes can be made inconspicuous even if they are scattered in an island shape as illustrated.

  Moreover, in order to prevent generation | occurrence | production of an interference fringe reliably, the adhesion layer of transparent film spacer 40D was provided so that it might be located between transparent film spacer 40D and the inner main surface 20b of the 2nd reflective element 20. Matching oil may be applied to the surface opposite to the surface on the side, or transparent by providing an adhesive layer on the surface opposite to the surface on which the adhesive layer of the transparent film spacer 40D is provided. The film spacer 40D may be configured to be affixed not only to the inner main surface 10b of the first reflecting element 10 but also to the inner main surface 20b of the second reflecting element 20.

  Here, when each transparent film spacer 40D is viewed along the thickness direction, the outer peripheral edge of the transparent film spacer 40D is on the first reflector 11 of the first reflective element 10 and the second reflector 21. It is preferable that the second reflector 21 is disposed so as to overlap. By comprising in this way, when the outer periphery of transparent film spacer 40D is seen along the thickness direction, the 1st transparent body 12 of the 1st reflective element 10, and the 2nd transparent body 22 of the 2nd reflective element 20 It will not overlap any of the above.

  Therefore, since the interface between the transparent film spacer 40D and the air layer 4 is not positioned on the optical path of light that contributes to image formation, the quality of the imaged object may be degraded. Can be prevented.

  In the present embodiment, the case where the transparent film spacer 40D is attached to the inner main surface 10b of the first reflective element 10 has been described as an example. However, the transparent film spacer 40D is a second reflective element. 20 may be affixed to the inner main surface 20b.

  In the present embodiment, the case where the transparent film spacers 40D are arranged in an array (island shape) has been described as an example. However, the transparent film spacer 40D includes the first reflective element 10 and the second reflective element. You may arrange | position in the strip | belt shape so that it may extend toward the other position of the said outer peripheral part from the predetermined value of the outer peripheral part of the element 20. FIG.

(Embodiment 8)
16 is a schematic plan view of the imaging element according to Embodiment 8 of the present invention with the frame-like frame removed, and FIG. 17 is an enlarged view of the main part of the imaging element shown in FIG. It is a schematic cross section along the XVII-XVII line shown in the inside. FIG. 18 is an exploded view of the first reflecting element of the imaging element shown in FIG. Hereinafter, the imaging element 1H in the present embodiment will be described with reference to FIGS.

  As shown in FIGS. 16 to 18, the imaging element 1H in the present embodiment has the first reflecting element 10 and the second reflecting element 20 compared to the imaging element 1F in the sixth embodiment described above. The configuration is mainly different in that each is composed of a composite reflective element in which unit reflective elements are connected.

  Specifically, as shown in FIG. 18, the first reflecting element 10 includes four unit reflecting elements 10A having a square shape in plan view and eight unit reflecting elements 10B having a right angled isosceles triangle shape in plan view. According to this rule, they are arranged side by side on the same plane, and these end portions are joined together to form a single-sided compound reflection element in plan view. The method of connecting a plurality of unit reflection elements in this way is generally called tiling, and is a method that is preferably used when manufacturing an imaging element with a large area.

  For example, an adhesive is used for joining the end portions of the unit reflecting elements 10A and 10B, and an epoxy-based adhesive can be preferably used. As shown in FIG. 17, by joining the end portions of the unit reflecting elements 10A and 10B with an adhesive, an adhesive layer 60a as a joint portion is provided between the end portions of the adjacent unit reflecting elements 10A and 10B. Will be located.

  The adhesive layer 60a is sandwiched between reflection films (not shown) that cover the end surfaces of the adjacent unit reflection elements 10A and 10B, and these reflection films are bonded to each other. Thereby, in the joint part of unit reflection element 10A, 10B, the 1st reflector 11 is comprised by these adhesive films 60a located between a pair of these reflective films, and the said pair of reflective films. .

  As shown in FIG. 16, the second reflecting element 20 also has four unit reflecting elements 20A having a square shape in plan view and eight units having a right isosceles triangle shape in plan view, similarly to the first reflecting element 10. It is comprised by the composite reflective element which consists of reflective element 20B. Therefore, in the joint part of unit reflection element 20A, 20B, the 2nd reflector 21 is comprised by a pair of reflection film 21a and the contact bonding layer 60b located between the said pair of reflection film 21a. .

  As shown in FIGS. 16 and 17, each of the plurality of ink spacers 40 </ b> C is provided in a spot shape at a predetermined position on the inner main surface 10 b of the first reflective element 10 made of a composite reflective element. More specifically, some of the plurality of ink spacers 40C are dots between the outer peripheral region 3 of the first reflective element 10 made of a composite reflective element and the outer peripheral region 3 of the second reflective element 20 made of a composite reflective element. The rest of the plurality of ink spacers 40C are arranged in a row, and the rest of the imaging contribution region 2 of the first reflection element 10 made of a composite reflection element and the image formation contribution region of the second reflection element 20 made of a composite reflection element 2 are arranged in an array as shown, for example, at a predetermined position in the internal space S sandwiched between the two.

  Even in such a configuration, the first reflective element 10 made of the composite reflective element and the second reflective element 20 made of the composite reflective element are spaced apart from each other by the ink spacer 40C and the composite reflective element is arranged. The air layer 4 is formed in a portion where the ink spacer 40C is not disposed in the space between the first reflective element 10 made of an element and the second reflective element 20 made of a composite reflective element.

  Therefore, by adopting the above configuration, the same effect as the effect in the above-described sixth embodiment can be obtained, and an imaging element capable of displaying a high-quality aerial image as compared with the prior art is obtained. be able to.

  Here, as shown in FIGS. 16 and 17, a portion of ink located in the internal space S sandwiched between the imaging contribution region 2 of the first reflection element 10 and the imaging contribution region 2 of the second reflection element 20. Each of the spacers 40C preferably overlaps the adhesive layers 60a and 60b serving as the above-described joint portions of the first reflective element 10 and the second reflective element 20 when viewed along the thickness direction.

  With such a configuration, when the ink spacer 40C is located in a part of the internal space S sandwiched between the imaging contribution region 2 of the first reflection element 10 and the imaging contribution region 2 of the second reflection element 20. Even so, since the ink spacer 40C can be prevented from blocking the optical path of the light contributing to the image formation, it is possible to prevent the deterioration of the quality of the real image of the imaged object.

  Furthermore, with this configuration, when the imaging element 1H is viewed from the second main surface 1b side, the ink spacer 40C becomes inconspicuous, so that a real image of the object imaged by the imaging element 1H can be obtained. Even when it is visually recognized, it is possible to prevent the eye from being focused on the imaging element 1H located on the rear side of the real image, and the real image can be visually recognized more easily.

  In addition, when the size of the ink spacer 40C is configured to be smaller than the width of the second reflector 21 including the adhesive layer 60b as a joint portion of the second reflective element 20, the ink spacer 40C corresponds to the adhesive layer 60b. Thus, the second reflector 21 can be configured not to protrude from the second reflector 21, and the above-described effects can be further enhanced.

  In the present embodiment, the case where the ink spacer 40C is provided on the inner main surface 10b of the first reflective element 10 made of a composite reflective element has been described as an example. However, the ink spacer 40C has a composite reflective element. You may provide in the inner side main surface 20b of the 2nd reflective element 20 which consists of elements.

  Here, the characteristic configurations disclosed in the above-described first to eighth embodiments of the present invention are summarized as follows.

  The imaging element has a first main surface and a second main surface that are positioned relative to each other in the thickness direction, and a real image of an object disposed at a spatial position on the first main surface side is on the second main surface side. An image is formed at a spatial position, and includes a flat plate-like first reflective element arranged on the first main surface side and a flat plate-like second reflective element arranged on the second main surface side. ing. The first reflective element includes a plurality of first reflectors arranged in parallel to each other so as to be aligned along a first direction orthogonal to the thickness direction, and an adjacent first of the plurality of first reflectors. A plurality of first transparent bodies filling between the reflectors. The second reflecting element includes a plurality of second reflectors arranged in parallel to each other so as to be aligned along a second direction orthogonal to both the thickness direction and the first direction, and the plurality of second reflectors. And a plurality of second transparent bodies filling between adjacent second reflectors. In the imaging element, at least one or more spacers are arranged in a part of the space between the first reflective element and the second reflective element, so that the first reflective element and the first reflective element are arranged. The two reflecting elements are spaced apart from each other, and an air layer is formed in a portion of the space between the first reflecting element and the second reflecting element where the spacer is not disposed. .

  In the imaging element, each of the first reflecting element and the second reflecting element has an imaging contribution region contributing to imaging and an imaging provided to surround the imaging contribution region. It is preferable to have a non-contributing outer peripheral region, in which case the spacer is disposed at least between the outer peripheral region of the first reflective element and the outer peripheral region of the second reflective element. It is preferable to surround a space sandwiched between the imaging contribution region of the first reflection element and the imaging contribution region of the second reflection element.

  In the imaging element, when viewed along the thickness direction, the first reflecting element and the second reflecting element may have the same polygonal shape, in which case The spacer in the portion disposed between the outer peripheral area of the first reflective element and the outer peripheral area of the second reflective element is at least an angle of the polygonal first reflective element and the second reflective element. It is preferable to be located in the middle of the position and the side.

  In the imaging element, the first main surface, the second main surface, and the end surface of the portion corresponding to the outer peripheral region of the first reflective element and the outer peripheral region of the second reflective element are frame-shaped frames. It is preferable that the first reflective element and the second reflective element are held by the frame-like frame.

  In the imaging element, even if the spacer is located in a part of a space sandwiched between the imaging contribution region of the first reflection element and the imaging contribution region of the second reflection element. Good.

  In the imaging element, a portion of the spacer disposed in a space sandwiched between the imaging contribution region of the first reflection element and the imaging contribution region of the second reflection element is configured by a wire. May be.

  In the imaging element, when viewed along the thickness direction, the wire extends along one of the extending direction of the first reflector and the extending direction of the second reflector. Thus, it is preferable to overlap the first reflector or the second reflector.

  In the imaging element, it is preferable that the wire does not overlap either the first transparent body or the second transparent body when viewed along the thickness direction.

  In the imaging element, the spacer in a portion arranged in a space sandwiched between the imaging contribution region of the first reflection element and the imaging contribution region of the second reflection element is the first reflection element. You may comprise in the ink part provided in the surface of either an element and the said 2nd reflective element.

  In the imaging element, it is preferable that the ink portion overlaps at least one of the first reflector and the second reflector when viewed along the thickness direction.

  In the imaging element, the spacer in the portion disposed in the space sandwiched between the imaging contribution area of the first reflection element and the imaging contribution area of the second reflection element is made of a transparent film. It may be configured.

  In the imaging element, it is preferable that the outer peripheral edge of the transparent film overlaps the first reflector and the second reflector when viewed along the thickness direction.

  In the imaging element, each of the first reflecting element and the second reflecting element includes a plurality of flat unit reflecting elements arranged side by side on the same plane, and ends of the plurality of unit reflecting elements. You may be comprised with the composite reflective element containing the seam part which connects parts. In that case, when viewed along the thickness direction, the portion of the portion disposed in the space sandwiched between the imaging contribution region of the first reflection element and the imaging contribution region of the second reflection element It is preferable that the spacer overlaps the seam portion.

  The imaging element is disposed in a space sandwiched between the imaging contribution region of the first reflection element and the imaging contribution region of the second reflection element when viewed along the thickness direction. It is preferable that the above-mentioned spacer in the part does not overlap any of the unit reflection elements.

  In the imaging element, it is preferable that the thickness of the spacer is 10 [μm] or more and 1000 [μm] or less.

  In the imaging element, it is preferable that the thickness of the spacer is the same between the first reflective element and the second reflective element.

  The individual characteristic configurations disclosed in the first to eighth embodiments of the present invention described above can naturally be combined with each other without departing from the spirit of the present invention. For example, the first reflective element and the second reflective element may be fixed in a state where they are separated by a flat spacer and an ink spacer, or the first reflective element and the second reflective element are a wire spacer and a transparent film spacer. It may be fixed in a state separated by. Further, in the case of using an ink spacer, the above-described layout exemplified in the case of using a wire spacer can be applied to the layout of the ink spacer.

  Thus, the above-described embodiment disclosed herein is illustrative in all respects and is not restrictive. The technical scope of the present invention is defined by the scope of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 1A-1H An imaging element, 1a 1st main surface, 1b 2nd main surface, 2 Imaging contribution area | region, 3 Outer periphery area | region, 4 Air layer, 10 1st reflection element, 10A, 10B Unit reflection element, 10a Outer main surface 10b inner main surface, 11 first reflector, 11b adhesive layer, 12 first transparent body, 20 second reflective element, 20A, 20B unit reflective element, 20a outer main surface, 20b inner main surface, 21 second reflector , 21a Reflective film, 21b Adhesive layer, 22 Second transparent body, 30 Frame-shaped frame, 30a Spacer part, 31 Buffer material, 40A Flat plate spacer, 40B Wire spacer, 40C Ink spacer, 40D Transparent film spacer, 50A, 50B Protection Member, 60a, 60b adhesive layer, 100 object, 200 real image, S internal space.

Claims (16)

A real image of an object having a first main surface and a second main surface positioned relative to each other in the thickness direction and disposed at a spatial position on the first main surface side is formed at a spatial position on the second main surface side An imaging element to cause
A flat plate-like first reflecting element disposed on the first main surface side;
A flat plate-like second reflective element disposed on the second main surface side,
The first reflecting element includes a plurality of first reflectors arranged in parallel to each other so as to be aligned along a first direction orthogonal to the thickness direction, and an adjacent first of the plurality of first reflectors. A plurality of first transparent bodies filling between the reflectors,
The second reflective element includes a plurality of second reflectors arranged in parallel to each other so as to be aligned along a second direction orthogonal to both the thickness direction and the first direction, and the plurality of second reflectors A plurality of second transparent bodies filling between adjacent second reflectors,
By disposing at least one spacer in a part of the space between the first reflective element and the second reflective element, the first reflective element and the second reflective element have a distance from each other. An imaging element that is spaced apart and has an air layer formed in a portion of the space between the first reflective element and the second reflective element where the spacer is not disposed. Each of the first reflective element and the second reflective element has an imaging contribution region that contributes to imaging and an outer peripheral region that is provided so as to surround the imaging contribution region and does not contribute to imaging.
The spacer is disposed at least between the outer peripheral region of the first reflective element and the outer peripheral region of the second reflective element, so that the imaging contribution region of the first reflective element and the second reflective element are connected. The imaging element according to claim 1, surrounding a space sandwiched between the image contribution regions. When viewed along the thickness direction, the first reflective element and the second reflective element have the same polygonal shape,
A portion of the spacer disposed between an outer peripheral region of the first reflective element and an outer peripheral region of the second reflective element is at least an angular position of the polygonal first reflective element and the second reflective element, and The imaging element according to claim 2, wherein the imaging element is located at an intermediate position of the side.   The first main surface, the second main surface, and the end surface of a portion corresponding to the outer peripheral region of the first reflective element and the outer peripheral region of the second reflective element are covered with a frame-shaped frame, thereby the first The imaging element according to claim 2, wherein the reflective element and the second reflective element are held by the frame-shaped frame.   5. The device according to claim 2, wherein the spacer is also located in a part of a space sandwiched between the imaging contribution region of the first reflection element and the imaging contribution region of the second reflection element. The imaging element as described.   The imaging element according to claim 5, wherein the spacer in a portion disposed in a space sandwiched between the imaging contribution region of the first reflection element and the imaging contribution region of the second reflection element is made of a wire. .   When viewed along the thickness direction, the wire extends along either the direction in which the first reflector extends or the direction in which the second reflector extends, whereby the first reflector or the The imaging element according to claim 6, wherein the imaging element overlaps the second reflector.   The imaging element according to claim 6, wherein the wire does not overlap any of the first transparent body and the second transparent body when viewed along the thickness direction.   The spacer disposed in the space sandwiched between the imaging contribution region of the first reflection element and the imaging contribution region of the second reflection element is any of the first reflection element and the second reflection element. The imaging element according to claim 5, comprising an ink portion provided on the surface.   The imaging element according to claim 9, wherein the ink portion overlaps at least one of the first reflector and the second reflector when viewed along the thickness direction.   The imaging element according to claim 5, wherein the spacer in a portion disposed in a space sandwiched between the imaging contribution region of the first reflection element and the imaging contribution region of the second reflection element is made of a transparent film. Child.   The imaging element according to claim 11, wherein an outer peripheral edge of the transparent film overlaps the first reflector and the second reflector when viewed along the thickness direction. Each of the first reflecting element and the second reflecting element includes a plurality of flat unit reflecting elements arranged side by side on the same plane, and a seam portion that joins ends of the plurality of unit reflecting elements. A composite reflective element including
When viewed along the thickness direction, the spacer in a portion arranged in a space sandwiched between the imaging contribution region of the first reflection element and the imaging contribution region of the second reflection element is the seam. The imaging element according to claim 5, wherein the imaging element overlaps a portion.   When viewed along the thickness direction, the spacer in a portion disposed in a space sandwiched between the imaging contribution region of the first reflection element and the imaging contribution region of the second reflection element is the unit. 14. An imaging element according to claim 13, which does not overlap any of the reflective elements.   The imaging element according to claim 1, wherein a thickness of the spacer is 10 [μm] or more and 1000 [μm] or less.   The imaging element according to claim 1, wherein the spacer has the same thickness between the first reflective element and the second reflective element.

Images