Aerial image formation device

Abstract

To provide an aerial image formation device that can be easily manufactured even when an optical panel becomes large.SOLUTION: An aerial image formation device 1 comprises an optical panel 2 that forms a stereoscopic image in the air at a z-axis position different from that of a subject when the subject is placed on the positive direction side of an x-axis of three-dimensional orthogonal coordinates comprising the x-axis, a y-axis, and a z-axis. The optical panel 2 includes elongated first light reflection planes 22 and second light reflection planes 23, both extending in the z-axis direction and repeatedly arranged along the y-axis. The first light reflection plane 22 is provided so as to be inclined at a predetermined inclination angle with respect to the positive direction of the y-axis, and the second light reflection plane 23 is provided so as to be orthogonal to the first light reflection plane 22 located on the positive side of the y-axis.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an aerial imaging device having one optical panel. [Background technology]

[0002] There is a known aerial imaging device that uses an optical panel for aerial imaging to form a three-dimensional image of a subject (actual object) in the air at a position different from the subject when light from the subject is incident on the panel. Such an aerial imaging device can be deployed in application devices such as digital signage.

[0003] Aerial imaging devices include those having a structure consisting of two overlapping optical panels, as disclosed in Patent Document 1, for example, and those having a structure consisting of a single optical panel, as disclosed in Patent Document 2, for example.

[0004] 13 shows an aerial imaging device 101 having a structure composed of one optical panel 102. This aerial imaging device 101 has a structure basically similar to that described in Patent Document 2. The optical panel 102 has a large number of transparent rectangular rods 121 (extending in the z-axis direction of a three-dimensional orthogonal coordinate system consisting of the x-axis, y-axis, and z-axis) made of glass or the like, a first light reflecting portion 122 and a second light reflecting portion 123 such as a metal film attached to two adjacent side surfaces of each of the large number of rectangular rods 121, and an adhesive sealing portion 124 that bonds and seals the large number of rectangular rods 121 arranged in the y-axis direction such that the second light reflecting portion 123 is inclined (angle is Φ) with respect to the negative direction of the y-axis and the first light reflecting portion 122 is sandwiched between the rectangular rods 121, 121.

[0005] As shown in FIG. 14, the optical panel 102 is configured such that light from a subject (actual object) N enters the optical panel 102 from the positive side of the x-axis, is refracted according to the refractive index of the adhesive seal portion 124, is reflected by either the first light reflecting portion 122 or the second light reflecting portion 123 (point indicated by r in FIG. 14), and the reflected light is reflected again by either the first light reflecting portion 122 or the second light reflecting portion 123 (point indicated by r' in FIG. 14), is refracted according to the refractive index of the adhesive seal portion 124, and is emitted to the positive side of the x-axis of the optical panel 102 at an emission angle equal to the incidence angle. The emitted light forms a stereoscopic image N' in the air at a position on the z-axis different from that of the subject N. Then, the reflected light that has been formed travels straight and enters the human eye, so that the viewer can recognize the stereoscopic image N' in the air as if the subject N were at that position. Note that the adhesive seal portion 124 is not shown in FIG. 14. For ease of understanding, the hidden portion of the lower left corner of the rectangular rod 121 is illustrated by a fine dashed line. Also, light from the subject N is illustrated diagrammatically by a solid line outside the optical panel 102 and by a dashed line inside the optical panel 102.

[0006] The aerial imaging device disclosed in Patent Document 2 can reduce the number of parts, thereby enabling cost reduction, and can also reduce the space required in the depth direction while providing clear stereoscopic images. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2011-175297 A [Patent Document 2] JP 2020-027228 A Summary of the Invention [Problem to be solved by the invention]

[0008] Incidentally, in recent years, large-scale application devices such as digital signage (for example, for use in stadiums, etc.) are often desired. However, the optical panel of the aerial imaging device of Patent Document 2 uses a large number of transparent rectangular rods made of glass or the like, to which a light reflecting part such as a metal film is attached, so the larger the size, the more difficult it becomes to manufacture.

[0009] The present invention has been made in consideration of the above circumstances, and has an object to provide an aerial imaging device that is easy to manufacture even when the optical panel is large. [Means for solving the problem]

[0010] In order to achieve the above object, the aerial imaging device according to claim 1 is an aerial imaging device including an optical panel that forms a stereoscopic image in the air at a position on the z axis different from that of a subject when the subject is placed on the positive side of the x axis of a three-dimensional orthogonal coordinate system consisting of the x axis, the y axis, and the z axis, and The optical panel has long first and second light reflecting planes, both of which extend in the z-axis direction, repeated along the y-axis, with the first light reflecting plane being inclined at a predetermined angle with respect to the positive direction of the y-axis, and the second light reflecting plane being tangent to and perpendicular to the first light reflecting plane, which is located on the positive side of the y-axis.

[0011] The aerial imaging device according to claim 2 is the aerial imaging device according to claim 1, wherein the tilt angle is the same for the entire optical panel.

[0012] An aerial imaging device according to a third aspect of the present invention is the aerial imaging device according to the first aspect, wherein the tilt angle increases as the value on the y-axis increases.

[0013] The aerial imaging device according to claim 4 is the aerial imaging device according to claim 3, wherein, when a distance from the optical panel to a predetermined point away from the optical panel in the x-axis direction is L and a position on the optical panel on the y-axis is d, the inclination angle θ is expressed as θ=45°+tan -1 Satisfies (d / L) / 2.

[0014] The aerial imaging device according to claim 5 is the aerial imaging device according to claim 4, wherein the inclination angle θ is θ=45°+tan -1 Satisfies (d / L) / 2.

[0015] The aerial imaging device described in claim 6 is an aerial imaging device described in any one of claims 1 to 5, in which the optical panel has the first light reflecting plane and the second light reflecting plane located on the positive side of the y axis, which are continuous when viewed from the positive side of the x axis.

[0016] The aerial imaging device described in claim 7 is an aerial imaging device described in any one of claims 1 to 5, in which, when viewed from the positive side of the x-axis, the first light reflecting plane and the second light reflecting plane located on the positive side of the y-axis are separated by a predetermined distance in the y-axis direction, and a long separation space is formed in the z-axis direction.

[0017] The aerial imaging device described in claim 8 is the aerial imaging device described in claim 7, in which the optical panel is formed by masking the portion of the separation space and selectively attaching a light reflecting film to an optical panel body made of a transparent synthetic resin, thereby forming the first light reflecting plane and the second light reflecting plane. Effect of the Invention

[0018] According to the aerial imaging device of the present invention, even if the optical panel is large, it can be easily manufactured. [Brief description of the drawings]

[0019] [Figure 1] FIG. 2 is a front view showing an optical panel of the aerial imaging device according to the embodiment of the present invention. [Diagram 2] FIG. 2 is a side view showing the optical panel of the same. [Diagram 3] FIG. 11 is a side view showing the optical panel of the above with another shape. [Figure 4] 3 is a reduced side view showing a schematic diagram of a relationship between the optical panel and a predetermined point (a point constituting a subject). FIG. [Diagram 5] 3 is a reduced front view showing a schematic diagram of a relationship between the optical panel and a predetermined point (and a point of the stereoscopic image). FIG. [Figure 6] 11 is a side view of the optical panel of the same embodiment, where (a) shows light that is incident, reflected by the first light reflecting plane, and then re-reflected by the second light reflecting plane, and (b) shows light that is incident, reflected by the second light reflecting plane, and then re-reflected by the first light reflecting plane. [Figure 7] 10 is a side view showing an example of the optical panel of the above in which the inclination angle increases as the y-axis value increases. FIG. [Figure 8] 8 is a side view showing the optical panel of FIG. 7, where (a) shows light that is incident, reflected by the first light reflecting plane, and then re-reflected by the second light reflecting plane, and (b) shows light that is incident, reflected by the second light reflecting plane, and then re-reflected by the first light reflecting plane. [Figure 9] FIG. 2 is a front view showing an example of the optical panel according to the first embodiment in which a separation space is formed. [Figure 10] FIG. 10 is a side view showing the optical panel of FIG. [Figure 11] 11 is a side view showing the optical panel of FIG. 10 together with a display device. [Figure 12] 10 is a front view showing the optical panel of FIG. 9 together with a light emitting element of a display device. [Figure 13] FIG. 1 is a side view of an example of an optical panel of a conventional aerial imaging device. [Figure 14] 14 is a three-dimensional diagram that illustrates the state of light in the optical panel of FIG. 13. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] An embodiment of the present invention will be described below. An aerial imaging device 1 according to an embodiment of the present invention includes one optical panel 2. When a subject (actual object) N is placed on the positive side of the x-axis of a three-dimensional orthogonal coordinate system consisting of the x-axis, y-axis, and z-axis, the optical panel 2 images a stereoscopic image N' in the air at a different position on the z-axis from the subject N. In this respect, the optical panel 2 is similar to the optical panel 102 described in the background art section.

[0021] 1 and 2, the optical panel 2 has a large number of first light reflecting planes 22 and second light reflecting planes 23 on the front side (the positive side of the x-axis) of the optical panel body 21. The first light reflecting planes 22 and second light reflecting planes 23 are both elongated surfaces extending in the z-axis direction. The first light reflecting planes 22 and second light reflecting planes 23 are repeatedly formed in this order along the y-axis.

[0022] The size of the optical panel 2 is not particularly limited, but it can be large, for example, with a size of 3 m or more in the y-axis direction and 4 m or more in the z-axis direction. Both the first light reflecting plane 22 and the second light reflecting plane 23 can have a length of 5 mm to 15 mm in a cross section perpendicular to the z-axis and a size of 4 m or more in the z-axis direction.

[0023] 2, the first light reflecting plane 22 is provided so as to be inclined at a predetermined inclination angle θ with respect to the positive direction of the y-axis. The details of the inclination angle θ will be described later. Note that the inclination angle θ is an acute angle.

[0024] The second light reflecting plane 23 is provided in contact with and perpendicular to the first light reflecting plane 22 located on the positive side of the y-axis. In other words, the first light reflecting plane 22 and the second light reflecting plane 23 are provided such that the angle of their inner corners when viewed from the positive side of the x-axis is 90°.

[0025] The first light reflecting plane 22 and the second light reflecting plane 23 are planes that can reflect light well. For example, the optical panel body 21 is made of metal or synthetic resin (e.g., acrylic resin, etc.), and the first light reflecting plane 22 and the second light reflecting plane 23 can be formed by attaching a light reflecting film such as a metal film to the optical panel body 21 by deposition or the like. Also, the optical panel body 21 is made of metal (e.g., aluminum, etc.), and the first light reflecting plane 22 and the second light reflecting plane 23 can be formed by polishing the optical panel body 21.

[0026] In the optical panel 2, the first light reflecting plane 22 and the second light reflecting plane 23 located on the positive side of the y axis are continuous when viewed from the positive side of the x axis. In other words, in the optical panel 2, the first light reflecting plane 22 and the second light reflecting plane 23 are in contact with each other on the rear side when viewed from the positive side of the x axis as described above, and also in contact with each other on the front side when viewed from the positive side of the x axis. In other words, the multiple first light reflecting planes 22 and the second light reflecting planes 23 are continuous in a sawtooth shape along the y axis in a cross section perpendicular to the z axis. This is a point that differs from the optical panel 2' described later.

[0027] Typically, the corners of the first light reflecting plane 22 and the second light reflecting plane 23 of the optical panel 2 on the near side when viewed from the positive direction of the x-axis are all aligned along the y-axis (i.e., they have the same position on the x-axis).

[0028] The optical panel main body 21 can be formed into a desired shape as shown in FIG. 2 by cutting the surface (the surface on the front side (the side facing the positive x-axis) of the optical panel main body 21) of a plate material (a relatively thick plate material). Alternatively, the optical panel main body 21 can be formed into a desired shape as shown in FIG. 3 by bending the optical panel main body 21, which is a plate material (a relatively thin plate material). After these cutting or bending processes, the above-mentioned light reflecting film is attached or polished. In this way, the optical panel 2 can be easily manufactured even if it is large.

[0029] When subject N is placed on the positive side of the x-axis, light from subject N enters the optical panel 2 and is reflected by either the first light reflecting plane 22 or the second light reflecting plane 23, and the reflected light is reflected again by the other of the first light reflecting plane 22 or the second light reflecting plane 23 and emitted on the positive side of the x-axis at an emission angle equal to the incidence angle. The emitted light forms a stereoscopic image N' in the air at a different position on the z-axis from subject N. Then, the reflected light that has formed the image travels straight and enters the human eye, allowing the viewer to recognize the stereoscopic image N' in the air as if subject N were at that position.

[0030] Next, the inclination angle θ of the first light reflecting plane 22 will be described. As shown in FIG. 4, light from a given point n that is a distance L away from the optical panel 2 in the x-axis direction is incident on the optical panel 2 at an incidence angle α (angle based on the x-axis direction) according to the position on the y-axis when viewed from the z-axis direction. The given point n is a point that constitutes the subject N. Here, it is assumed that the light is incident on the optical panel 2 perpendicularly (i.e., at an incidence angle α of 0°) when the y-axis position d is 0. As the y-axis position d moves away from 0 (i.e., as it approaches the ends), the absolute value of the incidence angle α increases. For example, if L=2.6 m and the y-axis positions d at both ends are ±1.5 m, the incidence angle α near both ends is tan -1(±1.5 / 2.6)=±30°. Light incident on the optical panel 2 from a specific point n is reflected by either the first light reflecting portion 22 or the second light reflecting portion 23, and the reflected light is reflected again by the other of the first light reflecting portion 22 or the second light reflecting portion 23 to be emitted from the optical panel 2, forming a point n' of a stereoscopic image (a point constituting a stereoscopic image N'). In FIG. 4, the point n' of the stereoscopic image is formed at a position overlapping with the specific point n, that is, at a position with a different z-axis position as shown in FIG. 5. The z-axis position of the point n' of the stereoscopic image differs depending on the position at which the light is incident on the optical panel 2. FIG. 5 shows a case where the light is incident on the central portion of the optical panel 2 at the z-axis position. Light that enters the optical panel 2 from a position to the left of that shown in the figure forms a stereoscopic image at point n' at a position shifted to the left of that shown in the figure, and light that enters the optical panel 2 from a position to the right of that shown in the figure forms a stereoscopic image at point n' at a position shifted to the right of that shown in the figure.

[0031] Furthermore, when the position d on the y axis is 0, the inclination angle θ can be set to 45°.

[0032] As shown in the center of Figures 6(a) and (b), in the vicinity of the position d on the y axis being 0, light from a given point n is perpendicularly incident on the optical panel 2. Then, substantially all of the incident light (indicated by a solid line with an arrow in the figure) is reflected by either the first light reflecting portion 22 or the second light reflecting portion 23, and the reflected light is reflected again by the other of the first light reflecting portion 22 or the second light reflecting portion 23 to be emitted from the optical panel 2, forming a stereoscopic image at point n'. Note that in Figure 6 (and Figure 8 described later), (a) shows the case where the incident light is first reflected by the first light reflecting portion 22, and (b) shows the case where the incident light is first reflected by the second light reflecting portion 23, out of the first light reflecting portion 22 and the second light reflecting portion 23.

[0033] As shown in the upper and lower parts of FIG. 6(a) and (b), when the inclination angle θ is the same throughout the optical panel 2, when the position d on the y axis is away from the position 0, the light incident on the optical panel 2 forms an image of a point n' of a stereoscopic image (indicated by a solid line with an arrow in the figure), and in addition, even if the light is reflected by either the first light reflecting portion 22 or the second light reflecting portion 23, the reflected light is not reflected again by either the first light reflecting portion 22 or the second light reflecting portion 23 (indicated by a dashed line with an arrow in the figure). Then, when the position d on the y axis is away from the position 0, the proportion of the light incident on the optical panel 2 that contributes to the formation of an image of a point n' of a stereoscopic image becomes slightly smaller. Note that the upper and lower parts of FIG. 6 depict the case where the incident angle α is about ±30°. In addition, when the inclination angle θ is the same throughout the optical panel 2, there is an advantage in that the optical panel 2 is easy to manufacture.

[0034] The inclination angle θ can be set to increase as the y-axis value increases, as shown in Fig. 7. In other words, if the y-axis position d is 45° at position 0, when the y-axis value is positive, the inclination angle θ increases as the y-axis position d moves away from position 0, and when the y-axis value is negative, the inclination angle θ decreases as the y-axis position d moves away from position 0. Note that "the inclination angle θ increases as the y-axis value increases" means that the inclination angle θ increases overall as the y-axis value increases, and there may be some portions where the inclination angle θ does not change.

[0035] For example, the inclination angle θ can be set to satisfy the following (Equation 1), where L is the distance in the x-axis direction between the optical panel 2 and the given point n, and d is the position on the y-axis of the optical panel 2. -1 (d / L) is the angle of incidence α. θ=45°+tan -1 (d / L) / 2 (Equation 1)

[0036] 8(a) and 8(b), when the inclination angle θ is set as shown in (Equation 1), the reflected light, when reflected by either the first light reflecting portion 22 or the second light reflecting portion 23, travels in the y-axis direction (positive or negative direction), is reflected again by the other of the first light reflecting plane 22 or the second light reflecting plane 23, and is emitted at the same emission angle as the incident angle. Then, when the values ​​of the x-axis positions of the corners on the near side as viewed from the positive direction side of the x-axis by the first light reflecting plane 22 and the second light reflecting plane 23 are all the same value, substantially all of the light incident on the optical panel 2 from a predetermined point n is reflected by either the first light reflecting plane 22 or the second light reflecting plane 23, and the reflected light is reflected again by the other of the first light reflecting plane 22 or the second light reflecting plane 23 and is emitted from the optical panel 2, so that a stereoscopic image point n' can be formed. Therefore, the amount of light that forms an image of point n' of the stereoscopic image increases, and thus the point n' of the stereoscopic image becomes clearer than when the inclination angle θ is the same across the entire optical panel 2.

[0037] When applying (Equation 1), for example, if L = 2.6 m and the y-axis position d at both ends is ±1.5 m, the inclination angle θ near both ends will be approximately 60° when the y-axis position d is in the vicinity of 1.5 m, and approximately 30° when the y-axis position d is in the vicinity of -1.5 m.

[0038] With regard to the distance L in the x-axis direction between the optical panel 2 and the predetermined point n, the exact position within the optical panel 2 may be the x-axis position of the near side corner as viewed from the positive direction of the x-axis of the first light reflecting plane 22 and the second light reflecting plane 23, or the x-axis position of the far side corner as viewed from the positive direction of the x-axis of the first light reflecting plane 22 and the second light reflecting plane 23, or may be somewhere in between. This is because, in reality, if the thickness of the optical panel 2 is thin (for example, about 10 mm), it has almost no effect on the calculation of (Equation 1).

[0039] Furthermore, regarding the position d on the y-axis in the optical panel 2, the strict position within a pair of the first light reflecting plane 22 and the second light reflecting plane 23 may be the y-axis position of the near side corner as viewed from the positive direction of the x-axis of the first light reflecting plane 22 and the second light reflecting plane 23, or the y-axis position of the far side corner as viewed from the positive direction of the x-axis of the first light reflecting plane 22 and the second light reflecting plane 23, or may be anywhere in between. This is because, in reality, if the combined length of the first light reflecting plane 22 and the second light reflecting plane 23 in the y-axis direction is short (for example, about 20 mm), it has almost no effect on the calculation of (Equation 1).

[0040] In addition, it is not necessary to satisfy (Formula 1) for all pairs of the first light reflecting plane 22 and the second light reflecting plane 23, and it is also possible to satisfy (Formula 1) for at least two pairs of the first light reflecting plane 22 and the second light reflecting plane 23. For example, the inclination angle θ can be set to 45° near the position d on the y axis of 0, and (Formula 1) can be satisfied for the first light reflecting plane 22 and the second light reflecting plane 23 near both ends (the position d on the y axis is near ±1.5 m), and the inclination angle θ can be interpolated from the position d on the y axis of 0 to the vicinity of both ends. Even in this case, the point n' of the stereoscopic image becomes clearer than when the inclination angle θ is the same angle for the entire optical panel 2, because the amount of light forming the point n' of the stereoscopic image increases.

[0041] In this way, by making the tilt angle θ larger as the value on the y-axis increases, the amount of light forming the image of point n' in the stereoscopic image can be increased, making the image clearer, compared to when the tilt angle θ is the same across the entire optical panel 2.

[0042] Next, a description will be given of an optical panel 2' that is effective when the aerial imaging device 1 is used in combination with another display device 3. The display device 3 has light-emitting elements 31, such as LEDs and EL elements, arranged two-dimensionally at a predetermined pitch. In the description of the optical panel 2', the same reference numerals will be used for parts of the optical panel 2' when there are corresponding parts in the optical panel 2.

[0043] In this optical panel 2', the first light reflecting plane 22 and the second light reflecting plane 23 are in contact with each other at the rear side when viewed from the positive direction of the x-axis, but are not in contact with each other at the front side when viewed from the positive direction of the x-axis. That is, as shown in Figs. 9 and 10, in the optical panel 2', the first light reflecting plane 22 and the second light reflecting plane 23 located on the positive direction of the y-axis are spaced apart from each other by a predetermined distance S in the y-axis direction when viewed from the positive direction of the x-axis, and a long separation space 2s is formed in the z-axis direction. As described above, this is a difference from the optical panel 2. Unless otherwise specified, the other points are the same as those of the optical panel 2. Note that Figs. 9 and 10 (and Figs. 11 and 12 to be described later) show the inclination angle θ being the same throughout the optical panel 2, but the inclination angle θ may be increased as the value of the y-axis increases.

[0044] Here, as shown in Fig. 11, the display device 3 is located behind the optical panel 2' when viewed from the positive side of the x-axis (i.e., on the negative side of the x-axis). The above-mentioned predetermined distance S is set so as not to hide the light-emitting elements 31, so that the light-emitting elements 31 of the display device 3 appear in the separation space 2s of the optical panel 2' when viewed from the positive side of the x-axis, as shown in Fig. 12. Note that in Fig. 12, the reference numerals of the light-emitting elements 31 are attached only to the light-emitting elements that appear on the leftmost side.

[0045] The optical panel 2' forms a long separation space 2s, and the optical panel body 21 is made of a transparent synthetic resin (e.g., transparent acrylic resin) so that light from the light emitting element 31 of the display device 3 passes through the separation space 2s, and the separation space 2s is masked and a light reflecting film is selectively attached to form the first light reflecting plane 22 and the second light reflecting plane 23. In this way, the optical panel 2' can be easily manufactured even if it is large.

[0046] When such an optical panel 2' is used, the amount of light that forms a stereoscopic image N' is theoretically less than that of the optical panel 2 under the same conditions, but it becomes possible to display an image from the display device 3 at the position of the optical panel 2' at the same time as the stereoscopic image N' is formed or at a different time from when the stereoscopic image N' is formed.

[0047] It is also possible to arrange the optical panels 2' and 2 side by side, or to provide optical panels 2 above and below and / or to the left and right of the optical panel 2'.

[0048] The above describes an aerial imaging device according to an embodiment of the present invention. However, the present invention is not limited to the above-described embodiment, and various design modifications are possible within the scope of the matters described in the claims. [Explanation of symbols]

[0049] 1 Aerial imaging device 2, 2' Optical Panel 21 Optical panel body 22 1st light reflection plane 23 Second light reflection plane 2s Separation space 3. Display device 31 Light emitting element d y-axis position on the optical panel L is the x-axis distance from the optical panel to a given point N Subject N' Stereo image of the subject n Predetermined points (points that compose the subject) n' 3D image point of a given point S is the specified distance in the y-axis direction of the separation space θ Tilt angle α angle of incidence

Claims

1. An aerial imaging device including an optical panel for forming a stereoscopic image in the air at a position on the z-axis different from a position of a subject when the subject is placed on the positive side of the x-axis of a three-dimensional orthogonal coordinate system consisting of the x-axis, y-axis, and z-axis, The optical panel has a first light reflecting plane and a second light reflecting plane, each of which is elongated and extends in the z-axis direction, and which are repeatedly formed along the y-axis, the first light reflecting plane is provided so as to be inclined at a predetermined inclination angle with respect to the positive direction of the y-axis; An aerial imaging device, wherein the second light reflecting plane is arranged in contact with and perpendicular to the first light reflecting plane, which is located on the positive side of the y axis.

2. 2. The aerial imaging device according to claim 1, An aerial imaging device in which the tilt angle is the same across the optical panel.

3. 2. The aerial imaging device according to claim 1, An aerial imaging device in which the tilt angle increases with increasing y-axis value.

4. 4. The aerial imaging device according to claim 3, When the distance from the optical panel to a predetermined point away from the optical panel in the x-axis direction is L and the position of the optical panel on the y-axis is d, the inclination angle θ in at least two pairs of the first light reflecting flat surface and the second light reflecting flat surface is expressed as follows: <h2 style=";text-align:left;direction:ltr">θ=45°+tan<h2 style=";text-align:left;direction:ltr"> －１ <h2 style=";text-align:left;direction:ltr"> (d / L) / 2 An aerial imaging device that satisfies the needs of our customers.

5. 5. The aerial imaging device according to claim 4, In all pairs of the first light reflecting flat surface and the second light reflecting flat surface, the inclination angle θ is <h2 style=";text-align:left;direction:ltr">θ=45°+tan<h2 style=";text-align:left;direction:ltr"> －１ <h2 style=";text-align:left;direction:ltr"> (d / L) / 2 An aerial imaging device that satisfies the needs of our customers.

6. The aerial imaging device according to any one of claims 1 to 5, The optical panel is an aerial imaging device in which the first light reflecting plane and the second light reflecting plane located on the positive side of the y axis are continuous when viewed from the positive side of the x axis.

7. The aerial imaging device according to any one of claims 1 to 5, The optical panel is an aerial imaging device in which, when viewed from the positive side of the x-axis, the first light reflecting plane and the second light reflecting plane located on the positive side of the y-axis are separated by a predetermined distance in the y-axis direction, forming a long separation space in the z-axis direction.

8. 8. The aerial imaging device according to claim 7, The optical panel is an aerial imaging device in which the first light reflecting plane and the second light reflecting plane are formed by selectively masking the space between the optical panel and the optical panel body made of a transparent synthetic resin and attaching a light reflecting film thereto.

Images