JP5085631B2 - Optical imaging apparatus and optical imaging method using the same - Google Patents

Description

The present invention relates to an optical imaging apparatus that forms a real image in the air and an optical imaging method using the same.

As a method of forming a real image using light emitted from the object surface, a plurality of double-sided reflective bands having a width of several μ to several tens of μ are arranged in parallel with each other at a minute pitch so that adjacent reflective surfaces face each other, An imaging element (for example, see Patent Document 1) in which the convergence area of the reflected light reflected by the reflecting surface is reduced, and an optical transmission path (rod lens) in which the incident angle and the reflection angle are equal to each other are parallel to the optical axis. A compound lens (see, for example, Patent Document 2) that arranges a plurality (for example, concentric radiation) and converges light that is incident on each light transmission path and passes through the light transmission path is proposed. . In addition, optical imaging in which a number of reflective elements having reflective surfaces orthogonal to the panel are arranged on the panel, light from the object is reflected once by each reflective surface, and the resulting reflected light is converged to form a real image An apparatus has been proposed (see, for example, Patent Document 3). Furthermore, as an optical element that causes bending of light when light passes through an element surface constituting one plane, light is reflected by one or more mirror surfaces arranged at an angle perpendicular to or close to the element surface. An imaging element is configured by arranging a plurality of unit optical elements, and light emitted from a projection object arranged on one side of the element surface is reflected on a mirror surface when passing through the element surface, thereby It has been disclosed to form a real image in a space without a physical entity on the other side and to construct a display device including such an imaging element (see, for example, Patent Document 4).

JP 58-21702 A JP 61-25104 A Japanese Patent Laid-Open No. 9-5503 WO2007 / 116639

However, the imaging element of Patent Document 1 has a problem that light from an object does not necessarily converge to one point after passing through the imaging element, and a clear real image cannot be obtained. Further, when observing a real image, depending on the observation position, a mirror image by reflected light reflected by the reflecting surface of the imaging element is simultaneously observed in addition to the real image, which also hinders observation of the real image. The compound lens of Patent Document 2 has no problem in the field of optical communication or the like. However, when reproducing an image, there is a problem that a clear real image cannot be obtained due to the influence of aberration and diffraction of the lens. Further, the optical imaging apparatus of Patent Document 3 has a problem that even if light from an object is reflected by a reflecting surface, it does not necessarily converge to one point and a clear real image cannot be obtained. Further, when observing a real image, depending on the observation position, a mirror image by reflected light reflected by the reflecting surface of the imaging element is simultaneously observed in addition to the real image, which also hinders observation of the real image. Furthermore, the imaging element of Patent Document 4 first forms a cylindrical body aligned with a metal mold by nano-processing, for example, and has a rough surface on the side surfaces corresponding to the first and second inner wall surfaces orthogonal to each other. Since it is formed by forming a smooth mirror surface with a thickness of 50 nm or less, there are problems that it is very difficult to manufacture the imaging element and that the cost of the imaging element is increased.

The present invention has been made in view of such circumstances, and an optical imaging apparatus that can be relatively easily manufactured and can easily form a clear real image in the air on the side of an observer viewing an object, and the same. An object is to provide an optical imaging method.

An optical imaging apparatus according to a first invention that meets the above object reflects light from an object on a first reflecting surface, and is arranged in a step with the first reflecting surface in a plan view. And a flat light control panel having a number of light reflecting elements that are reflected by the second reflecting surface that intersects with the first reflecting surface and passes therethrough. An optical imaging apparatus that forms a real image of the object at a plane-symmetric position,
A bisector that bisects the intersection angle between the first reflecting surface and the second reflecting surface of the light reflecting element disposed in the light control panel in plan view of the light control panel Intersect at a point on the light control panel.

In the optical imaging apparatus according to the first aspect of the present invention, a flat light-shielding portion in which the light reflecting element is not disposed around the one point where the bisectors intersect is formed, and the object passes through the one point and passes through the one point. It is preferable that the light source is disposed on one side of the light shielding part in a cylindrical body having a perpendicular perpendicular to the light shielding part as a central axis and a cross section as the light shielding part.

An optical imaging apparatus according to a second invention that meets the above object reflects light from an object on a first reflecting surface, and is arranged in a step with the first reflecting surface in a plan view. And a flat light control panel having a number of light reflecting elements that are reflected by the second reflecting surface that intersects with the first reflecting surface and passes therethrough. An optical imaging apparatus that forms a real image of the object at a plane-symmetric position,
The light control panel includes a plurality of divided light control panels in which the first reflective surface and the second reflective surface included are divided in parallel, and each of the divided light control panels in a plan view. The center line intersects at one point on the light control panel, and the intersection angle between the first reflecting surface and the second reflecting surface of the light reflecting element on the center line in plan view is equal to two. The dividing bisector coincides with the center line.

In the optical imaging apparatus according to the second aspect of the present invention, the first and second reflecting surfaces included in the divided light control panel are respectively disposed inside the first and second divided transparent flat plates. A plurality of light reflecting elements are arranged in a vertical and vertical direction on one side of the two divided transparent flat plates, and a plurality of the light reflecting elements are arranged on one side of each of the first and second divided transparent flat plates, It is preferable that the first and second reflecting surfaces are formed so as to intersect each other and face each other.

In the optical imaging apparatus according to a second aspect of the present invention, a flat light-shielding portion in which the light reflecting element is not disposed around the one point where the center lines of the divided light control panels intersect is formed, and the object is the one point It is preferable to be disposed on one side of the light-shielding part in a cylinder having a perpendicular line to the light-shielding part as a central axis and a cross-section as the light-shielding part.

An optical imaging method according to a third aspect of the present invention that meets the above-described object is that the light from the object is reflected by the first reflecting surface, and further arranged in a pair with the first reflecting surface so as to be seen in plan view. Then, a plate-like light control panel having a number of light reflecting elements that are reflected by the second reflecting surface that intersects with the first reflecting surface and passes therethrough, An optical imaging method for forming a real image of an object at a plane-symmetric position,
When the light control panel is viewed in plan, a bisector that bisects the intersection angle between the first reflection surface and the second reflection surface of the light reflection element included in the light control panel, Crossing at one point on the light control panel, the light reflecting element is reflected once each by the first reflecting surface and the second reflecting surface in the light passing through the light reflecting element. Increase the light passing through.

In the optical imaging method according to a third aspect of the present invention, a flat light-shielding portion in which the light reflecting element is not disposed around the one point where the bisectors intersect is formed, and the object passes through the one point and passes through the one point. It is preferable to arrange on one side of the light-shielding part in a cylindrical body having a perpendicular perpendicular to the light-shielding part as a central axis and a cross section as the light-shielding part.

An optical imaging method according to a fourth aspect of the present invention that meets the above-mentioned object is that light from an object is reflected by a first reflecting surface, further arranged in a pair with the first reflecting surface, and viewed in plan view. Then, a plate-like light control panel having a number of light reflecting elements that are reflected by the second reflecting surface that intersects with the first reflecting surface and passes therethrough, An optical imaging method for forming a real image of an object at a plane-symmetric position,
The light control panel is divided into a plurality of divided light control panels in which the first reflective surface and the second reflective surface included are parallel to each other, and a center line of each of the divided light control panels in plan view is obtained. Two intersecting at one point on the light control panel and bisecting the angle of intersection between the first reflecting surface and the second reflecting surface of the light reflecting element on the center line in plan view The light reflection in which the equipartition line is made to coincide with the center line, and is reflected by the first reflecting surface and the second reflecting surface once in each of the divided light control panels. The ratio of the light reflecting element that is reflected once by the first reflecting surface or the second reflecting surface and allows light to pass through the element is decreased.

In the optical imaging method according to a fourth aspect of the present invention, a flat light-shielding portion in which the light reflecting element is not disposed is formed around the one point where the center lines of the divided light control panels intersect, and the object is defined as the one point. It is preferable to arrange on one side of the light-shielding part in a cylinder having a perpendicular line to the light-shielding part as a central axis and a cross-section as the light-shielding part.

In the optical imaging apparatus according to the first aspect of the invention, the light from the object incident on the light reflecting element in the light control panel is reflected by the first reflecting surface, and further intersected with the first reflecting surface. Since the light is reflected by the second reflecting surface and passes through, the light passing through different light reflecting elements among the light emitted radially from one point of the object can be converged and a real image can be formed. become. Then, when the light control panel is viewed in plan, a bisector that bisects the intersection angle between the first reflection surface and the second reflection surface of the light reflection element intersects at one point on the light control panel. Thus, in each light reflecting element, the first reflecting surface or the second reflecting light is reflected by the first reflecting surface and the second reflecting surface once and passes through the light reflecting element. The ratio of light that is reflected only once on the reflecting surface and passes through the light reflecting element (transmitted light that is reflected once) is greatly reduced, and a mirror image of the object due to the transmitted light that is reflected once appears as ghost or noise. And a light control panel capable of obtaining a bright real image can be realized.

In the optical imaging apparatus according to the first aspect of the present invention, a flat light-shielding portion on which no light reflecting element is arranged is formed around one point where the bisectors intersect, and the object passes through this point and is perpendicular to the light-shielding portion. When arranged on one side of a light-shielding part in a cylinder having a perpendicular line as a central axis and a cross-section as a light-shielding part, the light from the object is not reflected by the first and second reflecting surfaces as it is. Transmitted light (non-reflected transmitted light) can be blocked, and transmitted light that is reflected once in the light from the object can be blocked efficiently.

In the optical imaging apparatus according to the second aspect of the invention, the light from the object incident on the light reflecting element in the light control panel is reflected by the first reflecting surface, and is further arranged to intersect with the first reflecting surface. Since the light is reflected by the second reflecting surface and passes through, the light passing through different light reflecting elements among the light emitted radially from one point of the object can be converged and a real image can be formed. become. The light control panel includes a plurality of divided light control panels in which the first reflection surface and the second reflection surface included are divided in parallel, and the center line of each divided light control panel in plan view Is a bisector that intersects at one point on the light control panel and bisects the intersection angle between the first reflecting surface and the second reflecting surface of the light reflecting element on the center line in plan view. By matching the center line with each other, each of the split light control panels reflects the first reflection on the first reflecting surface and the second reflecting surface once, and passes through the light reflecting element, the first reflection. The ratio of the light reflecting element that is reflected only once by the surface or the second reflecting surface and the light passes through is reduced, and the mirror image of the object due to the transmitted light that is reflected once is prevented from appearing as ghost or noise. Light control panel that can form bright real images easily Rukoto can.

In the optical imaging apparatus according to the second aspect of the present invention, the first and second reflecting surfaces included in the divided light control panel are arranged in the first and second divided transparent flat plates, respectively. A large number of light reflecting elements are arranged in a strip at a constant pitch perpendicular to one surface of the transparent flat plate, and a large number of light reflecting elements are arranged on the first and second sides of each of the first and second divided transparent flat plates. In the case where the reflecting surfaces are formed so as to cross and face each other, a large number of light reflecting elements can be easily and inexpensively manufactured.

In the optical imaging apparatus according to the second aspect of the present invention, a flat light-shielding portion in which no light reflecting element is arranged is formed around one point where the center lines of the divided light control panels intersect, and the object passes through one point and the light-shielding portion When the light source is disposed on one side of the light shielding part in a cylinder having a perpendicular line as a central axis and a cross section as a light shielding part, it is reflected by the first reflecting surface and the second reflecting surface in the light from the object. In addition, it is possible to block light that is transmitted without reflection (non-reflected transmitted light), and to efficiently block transmitted light that is reflected once among the light from the object.

In the optical imaging method according to the third aspect of the invention, the light from the object incident on the light reflecting element in the light control panel is reflected by the first reflecting surface, and further intersected with the first reflecting surface. Since the light is reflected by the second reflecting surface and passes through, the light passing through different light reflecting elements among the light emitted radially from one point of the object can be converged and a real image can be formed. become. Then, when the light control panel is viewed in plan, a bisector that bisects the intersection angle between the first reflection surface and the second reflection surface of the light reflection element included in the light control panel is defined as the light control panel. Among the light passing through the light reflecting element at the top point, the light reflected by the first reflecting surface and the second reflecting surface once and passing through the light reflecting element is Since the ratio of light that is reflected once by the first reflecting surface or the second reflecting surface and passes through the light reflecting element (transmitted light that is reflected once) is reduced, a mirror image of the object by the transmitted light that is reflected once is a real image. It is possible to greatly suppress the occurrence of overlapping with the image, and it is possible to obtain a bright real image in which ghost or noise is greatly reduced.

In the optical imaging method according to the third aspect of the present invention, a flat light-shielding portion in which no light reflecting element is arranged is formed around one point where the bisectors intersect, and the object passes through one point and is perpendicular to the light-shielding portion. When the light source is disposed on one side of the light-shielding portion in a cylinder having a cross-section as a central axis and passing through the light-shielding portion, the light is transmitted as it is without being reflected by the first reflecting surface and the second reflecting surface. Light (non-reflective transmitted light) can be blocked and transmitted light that is reflected once can be efficiently blocked out of light from an object.

In the optical imaging method according to the fourth aspect of the invention, the light from the object incident on the light reflecting element in the light control panel is reflected by the first reflecting surface, and is further arranged to intersect the first reflecting surface. Since the light is reflected by the second reflecting surface and passes through, the light passing through different light reflecting elements among the light emitted radially from one point of the object can be converged and a real image can be formed. become. Then, the light control panel is divided into a plurality of divided light control panels in which the included first reflection surface and second reflection surface are parallel to each other, and the center line of each divided light control panel in plan view is subjected to light control. A bisector that bisects the intersection angle between the first reflecting surface and the second reflecting surface of the light reflecting element that is crossed at one point on the panel and is on the center line in plan view is the center line. In the divided light control panel, the first reflecting surface or the second reflecting surface is used for the light reflecting element that reflects the light once by the first reflecting surface and the second reflecting surface and passes the light once. Since the ratio of the light reflecting element that reflects light once by the reflection surface 2 and transmits light is reduced, the mirror image of the object due to the light reflected once is suppressed from appearing as a ghost or noise, and a bright real image is formed. It becomes possible to form an image.

In the optical imaging method according to the fourth aspect of the present invention, a flat light-shielding portion in which no light reflecting element is arranged is formed around one point where the center lines of the respective divided light control panels intersect, and the object passes through one point and the light-shielding portion In the case where it is arranged on one side of the light-shielding part in a cylinder having a perpendicular line to the central axis and a cross-section as the light-shielding part, it is not reflected by the first reflecting surface and the second reflecting surface in the light from the object In addition, it is possible to block light that is transmitted as it is (non-reflective transmitted light), and to efficiently block transmitted light that is reflected once among the light from the object.

It is explanatory drawing of the light reflection element provided in the light control panel of the optical imaging device which concerns on the 1st Embodiment of this invention. (A) and (B) are a plan view and a side sectional view of the optical imaging apparatus. (A), (B) is sectional drawing and a top view of a division | segmentation light control panel. It is explanatory drawing of a composite panel. (A), (B) is explanatory drawing of the preparation methods of the same optically divided light control panel. (A)-(C) are explanatory drawings of the preparation methods of the same optically divided light control panel. It is explanatory drawing of the light reflection element provided in the light control panel of the optical imaging device which concerns on the 2nd Embodiment of this invention. (A), (B) is the X arrow sectional drawing of FIG. 7, and the Y arrow sectional drawing, respectively. (A) and (B) are a plan view and a side sectional view of an optical imaging apparatus according to a third embodiment of the present invention. It is explanatory drawing of the light reflection element provided in the light control panel of the optical imaging device. (A) and (B) are a plan view and a side sectional view of an optical imaging apparatus according to a fourth embodiment of the present invention. It is explanatory drawing of the light reflection element provided in the light control panel of the optical imaging device. (A) and (B) are a plan view and a side sectional view of an optical imaging apparatus according to a fifth embodiment of the present invention. (A), (B) is explanatory drawing of the preparation methods of the same optically divided light control panel. (A)-(C) are explanatory drawings of the preparation methods of a split light control panel.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIGS. 1 and 2, the optical imaging apparatus 10 according to the first embodiment of the present invention reflects the light from the object 11 by the first reflecting surface 12, respectively, A large number of light reflecting elements 14 that are arranged in a pair with the reflecting surface 12 and that are reflected by the second reflecting surface 13 that intersects the first reflecting surface 12 in plan view, for example, is arranged orthogonally, and passes therethrough. A flat light control panel 15 is provided, and a real image 16 of the object 11 is formed at a position symmetrical to the object 11 around the light control panel 15. Here, the adjacent light reflecting elements 14 are in close contact, and the first and second reflecting surfaces 12 and 13 of each light reflecting element 14 are parallel to each other. Therefore, the first and second reflecting surfaces 12 and 13 are in close contact with each other. In FIG. 1, only the first reflecting surface 12 corresponding to the light reflecting element 14 is shown in order to clarify the light reflecting element 14. Details will be described below.

As shown in FIGS. 2A and 2B, the light control panel 15 includes a plurality of, for example, N, in which the first reflection surface 12 and the second reflection surface 13 included are divided in parallel. The center line P of each split light control panel 17 in plan view has a single point on the light control panel 15 and has a center line in plan view. The bisector that bisects the intersection angle between the first reflecting surface 12 and the second reflecting surface 13 of the light reflecting element 14 on P coincides with the center line P. Here, when the divided light control panel 17 is a trapezoid of the same size, the light control panel 15 formed by arranging the divided light control panels 17 so that the center lines P of the divided light control panel 17 intersect at one point is as follows. When viewed from above, it is a regular N-gon.

Further, a flat light-shielding portion 18 where the light reflecting element 14 is not disposed is formed around one point where the center lines P of the divided light control panels 17 intersect, and the object 11 passes through this point and is perpendicular to the light-shielding portion 18. It is arranged on one side of the light shielding part 18 (below the light shielding part 18 in FIG. 2B) in a cylindrical body 19 having a perpendicular line as a central axis and a cross section of the light shielding part 18. Here, when the shape of the split light control panel 17 is a trapezoid, the light-shielding portion 18 in plan view is, for example, a regular N-square shape that circumscribes the circumcircle of the object 11 in plan view. By providing the light shielding part 18, light that passes through the light reflecting element 14 without being reflected by the first reflecting surface 12 and the second reflecting surface 13 in the light from the object 11 (non-reflecting passing light). Can be cut off. Further, in the light from the object 11, the light enters the light control panel 15 at a small incident angle, is reflected only once by the first reflecting surface 12 or the second reflecting surface 13, and passes through the light reflecting element 14. Light can also be blocked efficiently. Accordingly, it is possible to suppress the mirror image of the object 11 caused by the single reflection on the first reflecting surface 12 or the second reflecting surface 13 from appearing as a ghost or noise on the real image 16.

N is an integer in the range of 4 to 100, for example. And the ratio of the light reflection element 14 which exists on the centerline P with respect to the light reflection element 14 contained in the light control panel 15 improves, so that N is large. By improving the ratio of the light reflecting element 14 on the center line P, the ratio of the light reflected by the first reflecting surface 12 and the second reflecting surface 13 and passing through the light reflecting element 14 is reduced. Can be relatively increased (relatively reducing the proportion of light that is reflected once by the first reflecting surface 12 or the second reflecting surface 13 and passes through the light reflecting element 14). Brightness can be achieved and the appearance of a mirror image of the object 11 can be suppressed.

As shown in FIGS. 3A and 3B, the first and second reflecting surfaces 12 and 13 included in the divided light control panel 17 are inside the first and second divided transparent flat plates 20 and 21, respectively. In addition, the first and second divided transparent flat plates 20 and 21 are formed so as to be arranged in a large number and vertically in a strip shape at a constant pitch (for example, 0.1 to 1 mm). A large number of the light reflecting elements 14 are brought into close contact with each other, with the first and second reflecting surfaces 12 and 13 orthogonal to each other of the first and second divided transparent flat plates 20 and 21. It is formed by arranging. Accordingly, a large number of light reflecting elements 14 can be manufactured easily and inexpensively.

The trapezoidal divided light control panel 17 can be manufactured, for example, as follows.
First, for example, a plate-shaped transparent synthetic resin plate having a constant thickness, in which a metal reflecting surface (and thus a double-sided reflecting surface) made of a metal vapor deposition layer (or plating layer) such as aluminum or silver is formed on one surface side ( For example, a large number of acrylic resin plates or glass plates) are laminated so that the metal reflecting surfaces are arranged on one side, or the metal reflecting surfaces are in close contact with each other to produce a laminate. Next, as shown in FIG. 4, first and second panels 22 and 23 are produced by cutting out from this laminate so that a cut-out surface perpendicular to each metal reflecting surface is formed. Then, the metal reflecting surface 24 formed on the second panel 23 is in close contact with the metal reflecting surface 24 formed on the first panel 22 so as to be orthogonal to each other, for example, transparent adhesion. The composite panel 26 is formed by fixing with an agent. The thickness of the transparent synthetic resin plate or the glass plate corresponds to the pitch of the metal reflecting surface, and the thicknesses of the first and second panels are determined by the thickness at the time of cutting out from the laminate.

Next, as shown in FIG. 5A, the composite panel 26 is disposed horizontally, and formed on the metal reflective surface 24 and the second panel 23 formed on the first panel 22 in the composite panel 26 in plan view. The composite panel 26 is rotated around its center so that the direction of each bisector that bisects the intersecting angle (90 degrees) with the metal reflecting surface 25 is orthogonal to the left-right direction. Then, as shown in FIG. 5B, the split light control panel so that the upper base and the lower base of the trapezoid are parallel to the left and right direction, and the center line of the trapezoid coincides with one of the bisectors. 17 is cut out from the composite panel 26. Here, when the radius R _I of the circumscribed circle of the object 11 in plan view and the distance between the center of the regular N-gonal light control panel 15 and each vertex in plan view are R _O , the length L _{U of the} upper base is 2R _I sin (180 / N), the length L _D of the lower base is 2R _O sin (180 / N). Thereby, for example, the first divided transparent flat plate 20 is formed by the first panel 22, and the metal reflecting surface 24 formed on the first panel 22 becomes the first reflecting surface 12. Further, the second divided transparent flat plate 21 is formed by the second panel 23, and the metal reflecting surface 25 formed on the second panel 23 becomes the second reflecting surface 13. In addition, all side surfaces of the divided light control panel 17 are shielded to prevent light from entering through the side surfaces of the divided light control panel 17 between the adjacent divided light control panels 17.

The cut-out trapezoidal divided light control panels 17 are arranged so as to be connected so that the center lines P of the divided light control panels 17 intersect at one point, and a regular N-gonal shape in which a regular N-shaped hole is formed at the center. The light control panel 15 is manufactured by inserting a regular N-shaped light shielding portion 18 formed of an opaque member into a regular N-shaped hole. Here, the metal reflecting surfaces 24 and 25 respectively formed on the first and second panels 22 and 23 are parallel, and the first divided transparent flat plate 20 is formed by the first panel 22 and the second panel 23. Since the second divided transparent flat plate 21 is formed, respectively, when the divided light control panel 17 is formed by the first and second divided transparent flat plates 20, 21, the first reflection included in the divided light control panel 17. The surface 12 (the metal reflecting surface 24 of the first panel 22) and the second reflecting surface 13 (the metal reflecting surface 25 of the second panel 23) are parallel to each other.

Furthermore, the trapezoidal divided light control panel 17 can be manufactured as follows, for example.
First, the composite panel 26 is disposed horizontally, and the crossing angle between the metal reflection surface 24 formed on the first panel 22 and the metal reflection surface 25 formed on the second panel 23 in the composite panel 26 in plan view. The composite panel 26 is rotated around its center so that the direction of each bisector that bisects (90 degrees) is orthogonal to the left-right direction. 6A, from the composite panel 26, for example, one side is parallel to a bisector that bisects the intersection angle between the metal reflecting surface 24 and the metal reflecting surface 25, and The base material panel 27 having a rectangular shape in which the other side perpendicular to the side is perpendicular to the bisector is cut out. Next, as shown in FIG. 6B, the height from the base panel 27 is equal to the length of one side of the base panel 27, and each vertex is present on the opposite side, and the center line The isosceles triangle-shaped panel piece 28 is cut out so as to coincide with one of the bisectors that bisect the intersection angle between the metal reflecting surface 24 and the metal reflecting surface 25, as shown in FIG. The split light control panel 17 is formed by combining the isosceles triangular panel pieces 28 in a trapezoidal shape. Here, when the split light control panel 17 is formed, the center lines of the isosceles triangular panel pieces 28 arranged in the central portion are continuously linear, and the trapezoidal split light control panel 17 is formed. To match the centerline of Thereby, for example, the first divided transparent flat plate 20 is formed by the first panel 22, the metal reflecting surface 24 formed on the first panel becomes the first reflecting surface 12, and the second panel 23 The second divided transparent flat plate 21 is formed, and the metal reflecting surface 25 formed on the second panel 23 becomes the second reflecting surface 13. In addition, all the side surfaces of each panel piece 28 are subjected to light shielding treatment to prevent light from entering through the side surfaces of the panel pieces 28 between adjacent panel pieces 28.

Here, as the angle θ of the apex facing the base of the isosceles triangular panel piece 28 is reduced, N can be increased in the regular N-gonal light control panel 15 formed by the combination of the divided light control panels 17. The ratio of the light reflecting elements 14 on the center line P to the light reflecting elements 14 included in the light control panel 15 can be improved. As a result, the ratio of the light that is reflected only once by the first reflecting surface 12 and the second reflecting surface 13 and passes through the light reflecting element 14 can be relatively increased, and the real image can be brightened. Appearance of the mirror image of the object 11 can be suppressed.

Here, the thicknesses of the first and second panels 22 and 23 that determine the thickness of the first and second divided transparent flat plates 20 and 21 need to be adjusted according to the strength and size of the divided light control panel 17. For example, it is 0.5 to 10 mm. In addition, the width of the first and second reflecting surfaces 12 and 13 is, for example, 0.5q to 3q (preferably 0.9q to the pitch q of the first and second reflecting surfaces 12 and 13). 1.1q, more preferably q). When the width of the first and second reflecting surfaces 12 and 13 exceeds 3q, the light reflected by the first and second reflecting surfaces 12 and 13 is reflected by the adjacent first and second reflecting surfaces 12 and 13. Then, reflection by the first and second reflecting surfaces 12 and 13 is repeated again, and a clear image cannot be obtained. On the other hand, when the widths of the first and second reflecting surfaces 12 and 13 are less than 0.5q, the light reflected by the first and second reflecting surfaces 12 and 13 is reduced and a clear image cannot be obtained. .

Since the real image 16 of the object 11 is formed in a plane-symmetrical position with respect to the object 11 with the light control panel 15 as the center, the size of the light control panel 15 is the size of the object 11 in plan view, the object 11 and the light control panel. 15 is determined in consideration of the distance to 15. When the size of the light control panel 15 is determined, the pitch q of the first and second reflecting surfaces 12 and 13 is desirably adjusted according to the size of the light control panel 15, and the size of the light control panel 15 is When the size is small, the pitch q of the first and second reflecting surfaces 12 and 13 is set small. When the size of the light control panel 15 is large, the pitch q of the first and second reflecting surfaces 12 and 13 is set large. For example, when the size of the light control panel 15 is a square with a side of 100 mm, it is 0.3 to 0.4 mm, and when the size of the light control panel 15 is a square with a side of 400 mm, it is about 0.6 to 0.8 mm. .

Subsequently, an optical imaging method by the optical imaging apparatus 10 according to the first embodiment of the present invention will be described.
As shown in FIG. 2B, when light from the object 11 disposed on one side of the light shielding portion 18 in the cylindrical body 19 enters a flat light control panel 15 having a large number of light reflecting elements 14. The light having a small incident angle with respect to the light control panel 15 is blocked by the light shielding unit 18, and the light having a large incident angle (incidently incident on the light control panel 15) enters the split light control panel 17. As shown in FIG. 3, the light incident on the split light control panel 17 enters the light reflecting element 14 in the split light control panel 17 and is reflected by the first reflecting surface 12. Then, the reflected light reflected by the first reflecting surface 12 further proceeds in the light reflecting element 14. Here, the reflected light reflected at points a ₁ , a ₂ , and a _{3 on} the first reflecting surface 12 is reflected at points b ₁ , b ₂ , and b _{3 on} the second reflecting surface 13. Then, the light travels through the light reflecting element 14 and is emitted from the light reflecting element 14 to the outside. Further, a part of the reflected light reflected by the first reflecting surface 12 travels through the light reflecting element 14 without being reflected by the second reflecting surface 13 and is emitted to the outside.

Here, since the first and second reflecting surfaces 12 and 13 are arranged in a state of being orthogonal to each other, the first reflecting surface 12 has a ₁ point, a ₂ point, and a ₃ points. When the second reflection is performed and the reflected light is reflected for the second time at points b ₁ , b ₂ , and b _{3 on} the second reflecting surface 13, as shown in FIG. The reflected light becomes parallel to the incident light incident on the first reflecting surface 12 in plan view. For this reason, among the light incident on the optical imaging apparatus 10 from the object 11, the reflected light continuously reflected by the first and second reflecting surfaces 12 and 13 is symmetrical to the object 11 with the light control panel 15 in between. The real image 16 of the object 11 is formed at a position symmetrical with respect to the object 11 with the light control panel 15 interposed therebetween.

On the other hand, light that is reflected by the first reflecting surface 12 in the light reflecting element 14 and travels in the light reflecting element 14, travels in the light reflecting element 14 as it is, and is emitted to the outside, in the light reflecting element 14. Any of the light that enters, is reflected by the second reflecting surface 13, and is directly emitted from the light reflecting element 14 to the outside is not parallel to incident light incident on the light reflecting element 14 in plan view. For this reason, the light emitted to the outside from the light reflecting element 14 does not intersect and an image is not formed. In the optical imaging apparatus 10, the first and second reflecting surfaces 12 and 13 are metal reflecting surfaces, so that there is no limitation on the incident angle of light reflected by the first and second reflecting surfaces 12 and 13. The reflection angle is arbitrary. For this reason, an image can be formed at a wide range of angles.

Here, the light control panel 15 is divided into a plurality of divided light control panels 17 in which the first reflection surface 12 and the second reflection surface 13 included are parallel to each other. The center line P intersects at one point (the center of the light control panel 15), and the first reflecting surface 12 and the second reflecting surface 13 of the light reflecting element 14 on the center line P in plan view. One of the bisectors that bisect the intersection angle is made to coincide with the center line P. Thereby, the ratio of the light reflecting element 14 on the center line P to the light reflecting element 14 included in the light control panel 15 is improved. By improving the ratio of the light reflecting element 14 on the center line P, the ratio of the light reflected by the first reflecting surface 12 and the second reflecting surface 13 and passing through the light reflecting element 14 is reduced. It can be relatively increased, the real image 16 can be brightened, and the appearance of a mirror image of the object 11 can be suppressed.

Further, the object 11 passes through one point where the center lines P of the divided light control panels 17 intersect and passes through one point of the light shielding portion 18 in the cylindrical body 19 having a perpendicular line to the light shielding portion 18 as a central axis and a cross section as the light shielding portion 18. By disposing on the side (below the light shielding portion 18 in FIG. 2B), the light reflected from the object 11 is reflected by the first reflecting surface 12 and the second reflecting surface 13 of the light reflecting element 14. Therefore, it is possible to block the light passing through the light reflecting element 14 as it is. Thereby, it can prevent that the background of the area | region in which the real image 16 is formed becomes carelessly bright. Furthermore, the light that enters the light control panel 15 at a small incident angle, is reflected once by the first reflecting surface 12 or the second reflecting surface 13, and passes through the light reflecting element 14 can be efficiently blocked. . Thereby, it is possible to greatly suppress the appearance of the mirror image of the object 11 due to the transmitted light reflected once, overlapping the real image 16.

As shown in FIGS. 7 and 8, the optical imaging device 29 according to the second embodiment of the present invention is divided light control panel as compared with the optical imaging device 10 according to the first embodiment. It is characterized in that the configuration of 30 is different. For this reason, the split light control panel 30 will be described in detail, and the same components as those of the optical imaging apparatus 10 will be denoted by the same reference numerals and detailed description thereof will be omitted.

The first and second reflecting surfaces 31 and 32 included in the split light control panel 30 are made of first and second split transparent flat plates 33 and 34 (for example, acrylic resin plates) each having a thickness of 0.5 to 10 mm. A large number of strips are formed in the inside of the first and second divided transparent flat plates 33 and 34 and arranged in a strip shape at a constant pitch (for example, 0.1 to 1 mm). A large number of light reflecting elements 35 are in close contact with each other, with the first and second reflecting surfaces 31 and 32 orthogonal to each other of the first and second divided transparent flat plates 33 and 34. It is formed by arranging (an example of cross arrangement). Thereby, a large number of light reflecting elements 35 can be manufactured easily and inexpensively. In FIG. 7, the first and second divided transparent flat plates 33 and 34 are shown separately in order to clearly show the light traveling path.

As shown in FIGS. 8A and 8B, each of the first and second divided transparent flat plates 33 and 34 has a vertical cross section having a vertical surface extending in the thickness direction from one surface of the transparent synthetic resin plate. Triangular grooves 36 and 37 are formed at a predetermined pitch that is the same as the pitch of the first and second reflecting surfaces 31 and 32. The vertical surfaces of the grooves 36 and 37 are first and second reflecting surfaces 31 and 32 that reflect light incident obliquely into the first and second divided transparent flat plates 33 and 34. Between the grooves 36 and 37, light transmitting portions 38 and 39 constituting light passing surfaces that allow the reflected light reflected from the first and second reflecting surfaces 31 and 32 to pass therethrough are formed. The vertical surfaces of the grooves 36 and 37 may be formed with a metal (for example, silver) plating layer or a metal vapor deposition layer (which constitutes a metal reflection surface).

The first and second divided transparent flat plates 33 and 34 can be manufactured by press molding using a mold, but are manufactured by injecting a transparent synthetic resin into a mold having a predetermined shape and solidifying it. Is preferred. The bases of the grooves 36 and 37 are formed in advance in the mold, and one of the first and second divided transparent flat plates 33 and 34 is produced when the first and second divided transparent flat plates 33 and 34 are manufactured. It is formed on the side surface. The surface of the mold part that forms the slopes 40 and 41 of the grooves 36 and 37 is subjected to, for example, shot blasting or matte treatment that forms uneven portions of 3 to 50 μm, thereby forming the slopes 40 and 41 of the grooves 36 and 37. Is formed with convex and concave portions to which the concave and convex portions of the mold are transferred and subjected to the scattered light treatment. In this embodiment, the end of the first reflecting surface 31 of the first divided transparent flat plate 33 and the end of the second reflecting surface 32 of the second divided transparent flat plate 34 are brought into contact with each other. Arranged.

Here, as shown in FIG. 7, the width w of the first and second reflecting surfaces 31 and 32 in the form of strips is relative to the pitch p of the first and second reflecting surfaces 31 and 32 (grooves 36 and 37). For example, it is 0.5p or more and 3p or less (preferably 0.9p-1.1p, more preferably p). When the width of the first and second reflecting surfaces 31 and 32 exceeds 3p, the light reflected by the first and second reflecting surfaces 31 and 32 is scattered by the inclined surfaces 40 and 41 , and a part of the scattered light is once again obtained. 1. The reflection on the first and second reflecting surfaces 31 and 32 is repeated, and a clear image cannot be obtained. On the other hand, when the widths of the first and second reflecting surfaces 31 and 32 are less than 0.5 p, the light reflected by the first and second reflecting surfaces 31 and 32 is reduced and a clear image cannot be obtained. .

Subsequently, an optical imaging method by the optical imaging device 29 according to the second embodiment will be described with reference to FIGS.
As shown in FIG. 2, when light from the object 11 arranged on one side of the perpendicular passing through the center of the light shielding portion 18 enters the flat light control panel 15 having a large number of light reflecting elements 35, Light having a small incident angle with respect to the control panel 15 is blocked by the light shielding unit 18, and light having a large incident angle (incident obliquely) with respect to the light control panel 15 enters the split light control panel 30 shown in FIG. The light incident on the split light control panel 30 enters the first split transparent flat plate 33 of the light reflecting element 35 from the incident point A and travels. Here, since the inner groove 37 of the sectional right-angled triangle (outer region of the vertical plane) are present air, refractive index n _m of the inner split light control panel 30 (the inner area of the vertical surface), the outer region of the vertical plane, i.e. greater than refractive index n _a of the air. Therefore, when the light that has traveled a light reflecting element 35 is incident at an incident angle theta in a vertical plane, the vertical plane at an angle greater than the angle theta _c incident angle theta satisfies the relation of sinθ _{c =} n m _/ n _a In this case, total reflection of light occurs on the vertical surface, and at this time, the vertical surface becomes the first reflection surface 31.

Then, for example, the light totally reflected at the reflection point B on the first reflection surface 31 reaches the light transmission part 38 and exits from the light emission point C. Here, since the 1st division | segmentation transparent flat plate 33 and the 2nd division | segmentation transparent flat plate 34 are closely_contact | adhered, the light emitted from the light emission point c is from the light incident point d (contact | adherence with the light emission point c) of the light passage part 39. FIG. It enters into the second divided transparent flat plate 34. A part of the light totally reflected by the first reflecting surface 31 through the light passing portions 38 and 39 that are in contact with each other enters the second divided transparent flat plate 34, and the remaining portion is subjected to the scattered light processing. It is scattered and attenuated on the slope 40. The light that has entered the second divided transparent flat plate 34 travels through the second divided transparent flat plate 34 and reaches the vertical surface of the groove 37 having a right-angled triangular section. The vertical surface acts as the second reflection surface 32 only with respect to the light incident on the reflection point e at an incident angle causing total reflection among the light reaching the vertical surface of the groove 37, The totally reflected light further travels in the second divided transparent flat plate 34 and reaches the light exit point on the other side (the side where the second reflecting surface 32 is not formed) in the second divided transparent flat plate 34. To the outside.

Incidentally, the light incident angle is incident at less than theta _c in a vertical plane of the first divided transparent plate 33 enters into the groove 36 while being refracted in the vertical plane, the inclined surface 40 a part of the light is scattered light treatment has been performed The remaining portion passes through the light transmitting portion 39 of the second divided transparent flat plate 34 and enters the second divided transparent flat plate 34. Of the light that has entered the second divided transparent flat plate 34, the light totally reflected by the vertical surface of the groove 37 and the light that travels as it is in the second divided transparent flat plate 34 are the second divided transparent flat plate 34. It progresses to the other side of 34 and is discharged | emitted outside from the surface of the other side. The light incident angle is incident at theta _c in a vertical plane of the groove 36 of the first divided transparent plate 33, the second split a light along the vertical plane is reflected on the vertical surface of the groove 36 The light enters from the light transmission part 39 of the transparent flat plate 34 into the second divided transparent flat plate 34. A part of the light that has entered the second divided transparent flat plate 34 is scattered and attenuated by the inclined surface 41 of the groove 37 subjected to the scattered light treatment, and the remaining part is the other of the second divided transparent flat plate 34. Released from the side surface. Further, the light enters the second divided transparent flat plate 34 directly from the first divided transparent flat plate 33 via the light passing portions 38 and 39, proceeds in the second divided transparent flat plate 34, and enters the second divided transparent flat plate 34. There is also light emitted to the outside from the surface on the other side of 34.

Here, since the first and second reflecting surfaces 31 and 32 are arranged in a state of being orthogonally opposed to each other, the first and second reflecting surfaces 31 and 32 travel in the second divided transparent flat plate 34 to form the second divided transparent flat plate 34. Of the light emitted to the outside from the other surface, the incident light incident on the first reflecting surface 31 is reflected by the first reflecting surface 31 for the first time, and the reflected light is the second reflecting surface. When the second reflection occurs at 32, the second reflected light is radiated at the same angle as the incident angle of the incident light incident on the first reflecting surface 31. For this reason, among the light incident on the light control panel 15 from the object 11, the reflected light continuously reflected by the first and second reflecting surfaces 31 and 32 is symmetrical to the object 11 with the light control panel 15 in between. The real image 16 of the object 11 is generated at a position symmetrical with respect to the object 11 with the light control panel 15 interposed therebetween.

On the other hand, after passing through the groove 36 of the first divided transparent flat plate 33, it enters the second divided transparent flat plate 34, proceeds to the other side of the second divided transparent flat plate 34, and is released to the outside from the other side surface. light, at an incident angle theta _c in a vertical plane of the groove 36 of the first divided transparent plate 33, first enters the second divided transparent plate 34 becomes light along the vertical surface of the groove 36 Light that travels to the other side of the second divided transparent flat plate 34 and is emitted to the outside from the other side surface, and enters the second divided transparent flat plate 34 directly from the first divided transparent flat plate 33, and enters the second divided flat plate 34. The light that travels through the transparent flat plate 34 and is emitted to the outside from the other surface of the second divided transparent flat plate 34 does not reflect the incident light incident on the first divided transparent flat plate 33 at the same angle. . For this reason, the light emitted to the outside from the surface on the other side of the second divided transparent flat plate 34 does not intersect, and an image is not formed.

Here, as shown in FIGS. 2 and 7, the light control panel 15 is divided into a plurality of divided light control panels 30 in which the first reflection surface 31 and the second reflection surface 32 included are parallel, The center line P of each divided light control panel 30 in plan view intersects at the center of the light control panel, and the first reflecting surface 31 and the second reflecting surface 35 of the light reflecting element 35 on the center line P in plan view. The bisector that bisects the angle of intersection with the reflecting surface 32 is made to coincide with the center line P. Thereby, the ratio of the light reflecting element 35 on the center line P to the light reflecting element 35 included in the light control panel is improved. By improving the ratio of the light reflecting element 35 on the center line P, the ratio of the light reflected by the first reflecting surface 31 and the second reflecting surface 32 and passing through the light reflecting element 35 is reduced. It can be relatively increased, the real image 16 can be brightened, and the appearance of a mirror image of the object 11 can be suppressed.

Further, the object 11 passes through a point where the center lines P of the divided light control panels 30 intersect and passes through one point of the light shielding unit 18 in the cylindrical body 19 whose vertical axis is perpendicular to the light shielding unit 18 (FIG. 2B ) Below the light-shielding portion 18), so that in the light from the object 11, the light reflecting element 35 is not reflected by the first reflecting surface 31 or the second reflecting surface 32 of the light reflecting element 35 as it is. It is possible to efficiently block the light passing through 35 and the light reflected once by the first reflecting surface 31 or the second reflecting surface 32 and passing through the light reflecting element 35. Thereby, it is possible to greatly suppress the appearance of the mirror image of the object due to the transmitted light reflected once, overlapping the real image 16.

The optical imaging apparatus 42 according to the third embodiment of the present invention reflects light from the object 11 by the first reflecting surface 43 as shown in FIGS. 9 (A), (B), and FIG. Further, the first reflection surface 43 is paired with the first reflection surface 43 and is reflected by a second reflection surface 44 that is orthogonally arranged as an example of a cross arrangement with the first reflection surface 43 in plan view. A flat light control panel 46 having a large number of light reflecting elements 45 to be passed is provided, and the real image 16 of the object 11 is formed at a position symmetrical to the object 11 with the light control panel 46 as a center.

Here, when the light control panel 46 is viewed in plan, the intersection angle between the first reflection surface 43 and the second reflection surface 44 of the light reflection element 45 disposed in the light control panel 46 is divided into two equal parts. The equal lines intersect at one point on the light control panel 46. Further, a flat light-shielding portion 47 in which the light reflecting element 45 is not disposed is formed around one point on the light control panel 46 where the bisectors intersect, and the object 11 passes through one point and is perpendicular to the light-shielding portion 47. Is disposed on one side (downward in FIG. 9B) of the light-shielding portion 47 in the cylindrical body 48 having the cross-section as the central axis. Details will be described below.

The light control panel 46 includes first and second light control panels 49 and 50 formed of, for example, a circular transparent flat plate. The first and second light control panels 49 and 50 are circular regions having the same area as the circumscribed circle of the object 11 in plan view concentrically with the centers of the first and second light control panels 49 and 50. An opaque member is disposed on the light shielding regions 51 and 52. In the first and second light control panels 49 and 50, the outer regions of the light shielding regions 51 and 52 have a large number of rectangular cross sections perpendicular to the thickness direction of the first and second light control panels 49 and 50. Holes 53 and 54 are formed side by side. When the first and second light control panels 49 and 50 are overlapped so that the centers of the holes 53 and 54 having a rectangular cross section coincide with each other and the holes 53 and 54 intersect at right angles, the first and second lights are overlapped. One diagonal line Q of each through hole formed in the thickness direction of the control panels 49 and 50 intersects at the center of the first light control panel 49, and in the second light control panel 50 in plan view, each hole One diagonal S of 54 intersects at the center of the second light control panel 50, respectively.

Here, the holes 53 formed in the first light control panel 49 are arranged on both sides of the diagonal line Q, and the side surfaces facing the center of the first light control panel 49 are made of, for example, aluminum or silver. A metal reflecting surface (and hence a double-sided reflecting surface) made of a metal vapor deposition layer (or plating layer) is formed. Further, the holes 54 formed in the second light control panel 50 are arranged on both sides with the diagonal S interposed therebetween, and the side surface facing the center of the second light control panel 50 has, for example, aluminum or silver. The metal reflective surface (hence, it becomes a double-sided reflective surface) which consists of this metal vapor deposition layer (or plating layer) is formed. The first and second light control panels 49 and 50 align the center of the first light control panel 49 with the center of the second light control panel 50, and the first and second light control panels. The first and second light control panels 49 and 50 are positioned so as to be in close contact so that the center positions of the holes 53 and 54 formed in the holes 49 and 50 coincide with each other.

As a result, the metal reflecting surface formed on the first light control panel 49 becomes the first reflecting surface 43, and the metal reflecting surface formed on the second light control panel 50 becomes the second reflecting surface 44. A large number of light reflecting elements 45 having the second reflecting surface 44 arranged in a pair with the first reflecting surface 43 and the first reflecting surface 43 can be formed in the light control panel 46. In addition, the diagonal lines Q and S of the holes of the first and second light control panels 49 and 50 in plan view indicate the first reflection surface 43 and the second reflection surface 43 of the light reflection element 45 when the light control panel 46 is viewed in plan view. Therefore, the bisector intersects at one point (that is, the center) on the light control panel 46. Further, the light shielding portions 47 are formed by overlapping the light shielding regions 51 and 52.
Note that the first and second light control panels can be formed of an opaque member. In this case, a circular area having the same area as the circumscribed circle of the object 11 viewed from the center concentrically with the centers of the first and second light control panels is directly used as the light shielding area.

Subsequently, an optical imaging method by the optical imaging device 42 according to the third embodiment will be described.
As shown in FIG. 9B, when light from the object 11 disposed on one side of the light blocking portion 47 in the cylindrical body 48 is incident on a flat light control panel 46 having a large number of light reflecting elements 45. The light having a small incident angle with respect to the light control panel 46 is blocked by the light blocking unit 47, and the light having a large incident angle (incident obliquely) with respect to the light control panel 46 is incident on the first light control panel 49. The light incident on the first light control panel 49 enters the first light control panel 49 and is reflected by the first reflecting surface 43. A part of the reflected light reflected by the first reflecting surface 43 enters the second light control panel 50 from the first light control panel 49, and the second light control panel 50 receives the second light from the second light control panel 50. The light is reflected by the reflecting surface 44 and emitted from the second light control panel 50 to the outside.

Here, since the first and second reflecting surfaces 43 and 44 are arranged so as to be orthogonal to each other, the first reflecting surface 43 reflects the first time, and the reflected light is second. When the second reflection is caused by the reflection surface 44, the second reflection light becomes parallel to the incident light incident on the first reflection surface 43 in plan view. For this reason, among the light incident on the optical imaging device 42 from the object 11, the reflected light continuously reflected by the first and second reflecting surfaces 43 and 44 is separated from the object 11 with the light control panel 46 interposed therebetween. The light beam converges at a symmetric position, and a real image 16 of the object 11 is formed at a plane symmetric position with the object 11 with the light control panel 46 interposed therebetween.

On the other hand, the light is reflected by the first reflecting surface 43 of the first light control panel 49, travels through the first light control panel 49, enters the second light control panel 50 as it is, and enters the second light control panel. The light that travels through 50 and is emitted to the outside passes through the first light control panel 49, enters the second light control panel 50, is reflected by the second reflecting surface 44, and is reflected by the second light control panel. The light emitted from the inside to the outside is not parallel to the incident light incident on the first light control panel 49 in plan view. For this reason, the light emitted to the outside from the second light control panel 50 does not intersect and an image is not formed.

In the light control panel 46, the bisector that bisects the intersection angle between the first reflection surface 43 and the second reflection surface 44 of each light reflection element 45 in plan view is the center of the light control panel 46. We are in a cross. As a result, the ratio of the light reflected by the first reflecting surface 43 and the second reflecting surface 44 only once and passing through the light reflecting element 45 is relatively increased, the real image 16 can be brightened, and the object 11 Appearance of the mirror image can be suppressed. Then, the object 11 passes through the center of the light control panel 46 and is perpendicular to the light-shielding portion 47, and the one side of the light-shielding portion 47 in the cylindrical body 48 having the cross-section as the light-shielding portion 47 (FIG. 9B). Then, the light reflecting element 45 is not reflected by the first reflecting surface 43 or the second reflecting surface 44 of the light reflecting element 45 in the light from the object 11 as it is. Light that passes through the light control panel 46 and has a small incident angle with respect to the light control panel 46 and can be efficiently blocked by the light reflected by the first reflecting surface 43 or the second reflecting surface 44 and passing through the light reflecting element 45. . Thereby, it is possible to greatly suppress the appearance of the mirror image of the object 11 due to the transmitted light reflected once, overlapping the real image 16.

The optical imaging apparatus 55 according to the fourth embodiment of the present invention reflects light from the object 11 by the first reflecting surface 56 as shown in FIGS. 11 (A), (B), and FIG. And a flat light control panel 59 having a large number of light reflecting elements 58 that are reflected and passed by a second reflecting surface 57 that is arranged to intersect the first reflecting surface 56, for example, orthogonally arranged. A real image 16 of the object 11 is formed at a position symmetrical with respect to the object 11 with respect to 59. Here, when the light control panel 59 is viewed in plan, the intersection angle between the first reflection surface 56 and the second reflection surface 57 of each light reflection element 58 disposed in the light control panel 59 is divided into two equal parts. The bisectors intersect at one point on the light control panel 59. In addition, a flat light-blocking portion 60 in which the light reflecting element 58 is not disposed in a circular region having the same radius as the circumscribed circle of the object 11 in plan view, centered on one point on the light control panel 59 where the bisectors intersect. Is formed. The object 11 is arranged on one side of the light shielding unit 60 (downward in FIG. 11B) in a cylindrical body 61 having a perpendicular passing through the center of the light shielding unit 60 as a central axis and a cross section as the light shielding unit 60. . Details will be described below.

The light control panel 59 has, for example, a disk shape, and a plurality of square holes 62 having a square cross section are formed in the outer region of the light shielding unit 60 in a direction perpendicular to the thickness direction of the light control panel 59. When the hole 62 having a square cross section is viewed in plan, one of the diagonal lines T is the radial direction of the light control panel 59 and the other diagonal line is orthogonal to the radial direction of the light control panel 59. doing. Here, each hole 62 is disposed on both sides across the diagonal T, and a metal reflection made of a metal deposition layer (or plating layer) such as aluminum or silver is formed on a side surface facing the center of the light control panel 59. Surfaces (thus becoming double-sided reflective surfaces) are formed respectively.

Thus, in each hole 62 formed in the light control panel 59, the metal reflection surface formed on one side surface across the diagonal T is changed to the first reflection surface 56, the side surface on the other side with respect to the diagonal T. The formed metal reflecting surface can be used as the second reflecting surface 57, and the light reflecting element 58 having the first reflecting surface 56 and the second reflecting surface 57 arranged orthogonal to the first reflecting surface 56 is provided. Many light control panels 59 can be formed. When the hole 62 formed in the light control panel 59 is viewed in plan, the diagonal line T of the hole 62 intersects the first reflecting surface 56 and the second reflecting surface 57 of the light reflecting element 58 in plan view. It coincides with the bisector that bisects the angle.

Subsequently, an optical imaging method by the optical imaging device 55 according to the fourth embodiment will be described.
As shown in FIG. 11B, the light from the object 11 disposed on one side of the light shielding portion 60 in the cylindrical body 61 enters a flat light control panel 59 having a large number of light reflecting elements 58. Light having a small incident angle with respect to the light control panel 59 is blocked by the light shielding unit 60, and light having a large incident angle (incident obliquely) with respect to the light control panel 59 enters the light control panel 59. The light incident on the light control panel 59 enters the light reflecting element 58 of the light control panel 59. A part of the light is reflected by the first reflecting surface 56, and the reflected light is further reflected by the second reflecting surface 57 and further travels in the light reflecting element 58 and is emitted to the outside. Here, among the reflected light reflected by the first reflecting surface 56, a part of the light travels in the light reflecting element 58 and is emitted from the light control panel 59 to the outside. On the other hand, part of the light that enters the light reflecting element 58 and is not reflected by the first reflecting surface 56 is reflected by the second reflecting surface 57, travels inside the light reflecting element 58, and is emitted to the outside. Further, the remainder of the light that is not reflected by the first reflecting surface 56 travels through the light reflecting element 58 without being reflected by the second reflecting surface 57, and is emitted to the outside from the light control panel 59.

Here, since the first and second reflecting surfaces 56 and 57 are arranged so as to be orthogonal to each other, the incident light that has traveled through the light reflecting element 58 and entered the first reflecting surface 56 is obtained. Is reflected on the first reflecting surface 56 for the first time, and the reflected light causes a second reflection on the second reflecting surface 57, the second reflected light is incident on the first reflecting surface 56. Parallel to the light in plan view. For this reason, among the light incident on the optical imaging device 55 from the object 11, the reflected light continuously reflected by the first and second reflecting surfaces 56 and 57 is separated from the object 11 across the light control panel 59. The light beam converges at a symmetric position, and a real image 16 of the object 11 is formed at a plane symmetric position with the object 11 with the light control panel 59 interposed therebetween.

On the other hand, the light reflected by the first reflecting surface 56 of the light reflecting element 58 travels in the light reflecting element 58 and is directly emitted to the outside from the light reflecting element 58 (light control panel 59). Light that is not reflected by the first reflecting surface 56 but is reflected by the second reflecting surface 57 and is directly emitted from the light reflecting element 58 (light control panel 59) enters the first reflecting surface 56 as it is. The incident light is not parallel in plan view. For this reason, the light emitted to the outside from the light control panel 59 does not intersect, and an image is not formed.

Here, in the light control panel 59, the bisector that bisects the intersection angle between the first reflection surface 56 and the second reflection surface 57 of each light reflection element 58 in plan view is the light control panel. Intersect at the center of 59. As a result, the ratio of light reflected by the first reflecting surface 56 and the second reflecting surface 57 only once and passing through the light reflecting element 58 is relatively increased, and the real image 16 can be brightened, and the first It is possible to suppress the appearance of the mirror image of the object 11 due to the light that is reflected only once by the reflecting surface 56 or the second reflecting surface 57 and passes through the light reflecting element 58. Further, in the light from the object 11 arranged on one side of the light shielding unit 60 in the cylindrical body 61, the light is not reflected by the first reflecting surface 56 or the second reflecting surface 57 of the light reflecting element 58 as it is. The light passing through the light reflecting element 58 and the light reflected once by the first reflecting surface 56 or the second reflecting surface 57 and passing through the light reflecting element 58 can be effectively blocked. Thereby, it is possible to greatly suppress the appearance of the mirror image of the object due to the transmitted light reflected once, overlapping the real image 16.

As shown in FIGS. 13A and 13B, the optical imaging apparatus 63 according to the fifth embodiment of the present invention reflects light from the object 11 by the first reflecting surface 64, and further A flat light control panel 67 having a large number of light reflecting elements 66 that are reflected and passed by a second reflecting surface 65 arranged orthogonally to the first reflecting surface 64, for example, the orthogonally arranged second reflecting surface 65. The real image 16 of the object 11 is formed at a position symmetrical to the object 11. Here, the light control panel 67 includes a plurality of divided light control panels 68 in which the first reflection surface 64 and the second reflection surface 65 included are divided in parallel, and each divided light in plan view. The center line V of the control panel 68 intersects at one point on the light control panel 67, and the first reflecting surface 64 and the second reflecting surface 65 of the light reflecting element 66 on the center line V in plan view. The bisector that bisects the crossing angle of the line coincides with the center line V. Here, when the shape of the split light control panel 68 is a trapezoid of the same size, the light control panel is formed by arranging the split light control panels 68 with no gap so that the center lines V of the split light control panel 68 intersect at one point. 67 becomes a regular M-gon in plan view.

Further, in the light control panel 67, a flat light-shielding portion 69 in which the light reflecting element 66 is not disposed is formed around one point where the center lines V of the divided light control panels 68 intersect, and the object 11 passes through this one point. It is arranged on one side of the light shielding part 69 (downward in FIG. 13B) in a cylindrical body 70 having a perpendicular perpendicular to the light shielding part 69 as a central axis and a cross section as a light shielding part 69. Here, when the shape of the split light control panel 68 is a trapezoid, the light shielding unit 69 in plan view is, for example, a regular M square circumscribing the circumscribed circle of the object 11 in plan view. By providing the light shielding unit 69, light that passes through the light reflecting element 66 without being reflected by the first reflecting surface 64 and the second reflecting surface 65 in the light from the object 11 (non-reflected passing light). Can be cut off. Further, among the light from the object 11, the incident angle with respect to the light control panel 67 is small, and the light that is reflected only once by the first reflecting surface 64 or the second reflecting surface 65 and passes through the light reflecting element 66 is also efficient. Can be blocked. Accordingly, it is possible to suppress the mirror image of the object 11 due to the single reflection at the first reflecting surface 64 or the second reflecting surface 65 from appearing as a ghost or noise with respect to the real image 16.

Note that M is an integer in the range of 4 to 100, for example. And the ratio of the light reflection element 66 which exists on the centerline V with respect to the light reflection element 66 contained in the light control panel 67 improves, so that M is large. By improving the ratio of the light reflecting element 66 on the center line V, the ratio of the light reflected by the first reflecting surface 64 and the second reflecting surface 65 and passing through the light reflecting element 66 is reduced. It is possible to relatively increase (relatively reduce the proportion of light that is reflected only once by the first reflecting surface 64 or the second reflecting surface 65 and passes through the light reflecting element 66), and brightens the real image. And the appearance of a mirror image of the object 11 can be suppressed.

Here, the trapezoidal split light control panel 68 can be manufactured as follows, for example.
First, as shown in FIG. 14A, a plurality of square holes 72 having a square cross section are formed in the original panel 71 in parallel with a predetermined interval in a direction perpendicular to the thickness direction. Then, when the hole 72 having a square section is viewed in plan, one of the two sets of side surfaces disposed on both sides of the one diagonal line G of the two pairs of diagonal lines of each hole 72. In addition, for example, metal reflecting surfaces 73 and 74 (thus forming double-sided reflecting surfaces) made of a metal deposition layer (or plating layer) such as aluminum or silver are formed. Next, the original panel 71 is horizontally disposed, and each of the two halves divides the intersection angle (90 degrees) between the metal reflecting surface 73 and the metal reflecting surface 74 formed in the hole 72 in the original panel 71 in plan view. The original panel 71 is rotated around its center so that the direction of the line (diagonal line G) is orthogonal to the left-right direction. Then, as shown in FIG. 14B, the upper base and the lower base of the trapezoid are parallel to the left-right direction so that the center line of the trapezoid coincides with one of the bisectors (diagonal line G). The split light control panel 68 is cut out from the original panel 71. Here, when the radius R _I of the circumscribed circle of the object 11 in plan view and the distance between the center of the regular M-gonal light control panel 15 and each vertex in plan view are R _O , the length L _{U of the} upper base is 2R _I sin (180 / M), the length L _D of the lower base is 2R _O sin (180 / M). Thereby, for example, the metal reflecting surface 73 becomes the first reflecting surface 64 and the metal reflecting surface 74 becomes the second reflecting surface 65.

Note that the cut-out trapezoidal divided light control panels 68 are arranged so as to be connected so that the center lines V of the divided light control panels 68 intersect at one point, and a regular M square having a regular M square hole formed at the center. The light control panel 67 is manufactured by inserting a regular M-shaped light shielding portion 69 formed of an opaque member into a regular M-shaped hole. Here, since the metal reflection surfaces 73 and 74 formed in each hole 72 are parallel to each other, the first reflection surface 64 (the metal reflection surface 73 of the original panel 71) and the second reflection included in the split light control panel 68. The surface 65 (the metal reflecting surface 74 of the original panel 71) is parallel to it.

Furthermore, the trapezoidal divided light control panel 68 can be manufactured as follows, for example.
First, the direction of each bisector that bisects the intersection angle (90 degrees) between the metal reflection surface 73 and the metal reflection surface 74 in the original panel 71 in a plan view when the original panel 71 is arranged horizontally, The original panel 71 is rotated around its center so as to be orthogonal to the left-right direction. Then, as shown in FIG. 15A, from the original panel 71, for example, one side is parallel to a bisector that bisects the intersection angle between the metal reflecting surface 73 and the metal reflecting surface 74. A rectangular base panel 75 in which the other side orthogonal to this side is perpendicular to the bisector is cut out. Next, as shown in FIG. 15B, the height from the base panel 75 is equal to the length of one side of the base panel 75, each vertex is present on the opposite side, and the center line is metal. An isosceles triangular panel piece 76 is cut out so as to coincide with one of the bisectors that bisect the angle of intersection between the reflecting surface 73 and the metal reflecting surface 74, and as shown in FIG. The split light control panel 68 is formed by combining the equilateral triangular panel pieces 76 in a trapezoidal shape. Here, when the split light control panel 68 is formed, the center lines of the isosceles triangular panel pieces 76 arranged in the center portion are continuously linear, and the trapezoidal split light control panel 68 is formed. To match the centerline of Thereby, for example, the metal reflecting surface 73 formed in each hole 72 becomes the first reflecting surface 64, and the metal reflecting surface 74 becomes the second reflecting surface 65. In addition, the entire side surface of the panel piece 76 is subjected to a light shielding process to prevent light from entering through the side surface of the panel piece 76 between the adjacent panel pieces 76.

Here, as the angle φ of the apex facing the bottom of the isosceles triangular panel piece 76 is reduced, M can be increased in the regular M-gonal light control panel 67 formed by the combination of the divided light control panels 68. The ratio of the light reflecting elements 66 on the center line V to the light reflecting elements 66 included in the light control panel 67 can be improved. This makes it possible to relatively increase the proportion of light that is reflected only once by the first reflecting surface 64 and the second reflecting surface 65 and passes through the light reflecting element 66, and can brighten the real image. Appearance of the mirror image of the object 11 can be suppressed.

Subsequently, an optical imaging method by the optical imaging device 63 according to the fifth embodiment will be described.
As shown in FIG. 13B, the light from the object 11 arranged on one side of the light shielding portion 69 in the cylindrical body 70 enters a flat light control panel 67 having a large number of light reflecting elements 66. Light having a small incident angle with respect to the light control panel 67 is blocked by the light shielding unit 69, and light having a large incident angle (incident obliquely) with respect to the light control panel 67 enters the light control panel 67. The light incident on the light control panel 67 enters the light reflecting element 66 of the light control panel 67. A part of the light is reflected by the first reflecting surface 64, and the reflected light is further reflected by the second reflecting surface 65 and further travels in the light reflecting element 66 and is emitted to the outside. Here, of the reflected light reflected by the first reflecting surface 64, a part of the light travels inside the light reflecting element 66 and is emitted from the light control panel 67 to the outside. On the other hand, part of the light that enters the light reflecting element 66 and is not reflected by the first reflecting surface 64 is reflected by the second reflecting surface 65, travels through the light reflecting element 66, and is emitted to the outside. Further, the remainder of the light that is not reflected by the first reflecting surface 64 travels through the light reflecting element 66 without being reflected by the second reflecting surface 65, and is emitted from the light control panel 67 to the outside.

Here, the light control panel 67 is divided into a plurality of divided light control panels 68 in which the first reflection surface 64 and the second reflection surface 65 included are parallel to each other. The center line V intersects at the center of the light control panel 67, and the intersection angle between the first reflecting surface 64 and the second reflecting surface 65 of the light reflecting element 66 on the center line V in plan view is determined. The bisector that bisects is made to coincide with the center line V. Thereby, the ratio of the light reflecting element 66 on the center line V to the light reflecting element 66 included in the light control panel 67 is improved. By improving the ratio of the light reflecting element 66 on the center line V, the ratio of the light reflected by the first reflecting surface 64 and the second reflecting surface 65 and passing through the light reflecting element 66 is reduced. It can be relatively increased, the real image 16 can be brightened, and the appearance of a mirror image of the object 11 can be suppressed.

In addition, the object 11 passes through one point where the center lines V of the respective divided light control panels 68 intersect, and is perpendicular to the light shielding unit 69. By disposing on the side (below the light shielding portion 69 in FIG. 13B), the light from the object 11 is reflected by the first reflecting surface 64 or the second reflecting surface 65 of the light reflecting element 66. Therefore, the light that passes through the light reflecting element 66 as it is, the light that is reflected once by the first reflecting surface 64 or the second reflecting surface 65 and passes through the light reflecting element 66 can be efficiently blocked. Thereby, it is possible to greatly suppress the appearance of the mirror image of the object 11 due to the transmitted light reflected once, overlapping the real image 16.

As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above-described embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included.
For example, in the first to third embodiments, the end of the first reflecting surface and the end of the second reflecting surface are brought into close contact with each other, but the end of the first reflecting surface and the second reflecting surface are in close contact with each other. A gap may be formed between the two. Here, the width of the gap can be, for example, 100 times or less the width of the first and second reflecting surfaces.
In the first embodiment, the metal reflection surface is formed on one side of the transparent synthetic resin plate. However, the metal reflection surface may be formed on both side surfaces of the transparent synthetic resin plate or the glass plate. And a laminated body is produced by laminating a large number of transparent synthetic resin plates or glass plates having metal reflecting surfaces formed on both side surfaces, and cut-out surfaces perpendicular to the respective metal reflecting surfaces are formed from this laminated body. The first and second divided transparent flat plates can also be formed by cutting out like this.
Furthermore, although the pitches of the first and second reflecting surfaces are the same in the first and second embodiments, the pitches of the first and second reflecting surfaces may be different.

In the first, second, and fifth embodiments, the light control panels of the same N size and the right M square are arranged by arranging the divided light control panels of the same size around one point where the center lines of the divided light control panels intersect. Although each is formed, a fan-shaped light control panel may be formed by arranging divided light control panels of the same size around a point where the center lines of the divided light control panels intersect each other in an angle range of 90 ° to 180 ° without a gap. .
Further, the divided light control panels may have different sizes as long as they are arranged without a gap so that the center lines of the divided light control panels intersect at one point.
In the real image of the object reproduced by the optical imaging apparatus of the present invention, the unevenness is reversed. For this reason, the two optical imaging devices of the present invention are arranged side by side in the traveling direction of the light emitted from the object, and the unevenness of the real image reproduced by the first optical imaging device (arranged on the object side) By inverting again with the second optical imaging device, the unevenness of the real image can be made normal.

10: Optical imaging device, 11: Object, 12: First reflecting surface, 13: Second reflecting surface, 14: Light reflecting element, 15: Light control panel, 16: Real image, 17: Split light control panel, 18: light shielding part, 19: cylindrical body, 20: first divided transparent flat plate, 21: second divided transparent flat plate, 22: first panel, 23: second panel, 24, 25: metal reflecting surface, 26: composite panel, 27: base panel, 28: panel piece, 29: optical imaging device, 30: split light control panel, 31: first reflecting surface, 32: second reflecting surface, 33: first Divided transparent flat plate, 34: second divided transparent flat plate, 35: light reflecting element, 36, 37: groove, 38, 39: light transmitting portion, 40, 41: slope, 42: optical imaging device, 43: first 1 reflecting surface, 44: second reflecting surface, 45: light reflecting element, 46: light control panel, 47: light shielding portion, 48 Cylindrical body, 49: 1st light control panel, 50: 2nd light control panel, 51, 52: Light-shielding area | region, 53, 54: Hole, 55: Optical imaging device, 56: 1st reflective surface, 57 : Second reflecting surface, 58: light reflecting element, 59: light control panel, 60: light shielding unit, 61: cylindrical body, 62: hole, 63: optical imaging device, 64: first reflecting surface, 65: Second reflection surface, 66: light reflection element, 67: light control panel, 68: split light control panel, 69: light shielding unit, 70: cylindrical body, 71: original panel, 72: hole, 73, 74: metal reflection Surface, 75: base panel, 76: panel piece

Claims (9)

Light from an object is reflected by the first reflecting surface, and further arranged in a pair with the first reflecting surface, and is arranged in a stepwise manner and crossed with the first reflecting surface in plan view. An optical imaging system comprising a plate-like light control panel having a number of light reflecting elements that are reflected by a reflecting surface and passed therethrough, and forms a real image of the object at a position symmetrical to the object with the light control panel as a center. A device,
A bisector that bisects the intersection angle between the first reflecting surface and the second reflecting surface of the light reflecting element disposed in the light control panel in plan view of the light control panel Is an optical imaging device characterized by intersecting at one point on the light control panel. 2. The optical imaging apparatus according to claim 1 , wherein a flat light-shielding portion on which the light reflecting element is not disposed is formed around the one point where the bisectors intersect, and the object passes through the one point and the light shielding An optical imaging apparatus, wherein the optical imaging apparatus is disposed on one side of the light shielding portion in a cylindrical body having a perpendicular perpendicular to the portion as a central axis and a cross section as the light shielding portion. Light from an object is reflected by the first reflecting surface, and further arranged in a pair with the first reflecting surface, and is arranged in a stepwise manner and crossed with the first reflecting surface in plan view. An optical imaging system comprising a plate-like light control panel having a number of light reflecting elements that are reflected by a reflecting surface and passed therethrough, and forms a real image of the object at a position symmetrical to the object with the light control panel as a center. A device,
The light control panel includes a plurality of divided light control panels in which the first reflective surface and the second reflective surface included are divided in parallel, and each of the divided light control panels in a plan view. The center line intersects at one point on the light control panel, and the intersection angle between the first reflecting surface and the second reflecting surface of the light reflecting element on the center line in plan view is equal to two. An optical imaging apparatus, wherein a bisector to be divided coincides with the center line. 4. The optical imaging apparatus according to claim 3, wherein the first and second reflecting surfaces included in the split light control panel are respectively provided in the first and second split transparent plates. A plurality of the light reflecting elements are arranged vertically at a constant pitch in a strip shape perpendicularly to the surface on one side of the divided transparent flat plate, and each of the light reflecting elements has one surface side of each of the first and second divided transparent flat plates, An optical imaging apparatus formed by arranging the first and second reflecting surfaces so as to cross each other and face each other. 5. The optical imaging apparatus according to claim 3 , wherein a flat light-shielding portion in which the light reflecting element is not disposed around the one point where the center lines of the divided light control panels intersect is formed, and the object is An optical imaging apparatus, wherein the optical imaging apparatus is disposed on one side of the light shielding portion in a cylindrical body having a perpendicular line passing through one point and perpendicular to the light shielding portion as a central axis and having a cross section as the light shielding portion. Light from an object is reflected by the first reflecting surface, and further arranged in a pair with the first reflecting surface, and is arranged in a stepwise manner and crossed with the first reflecting surface in plan view. Optical imaging that uses a plate-like light control panel having a number of light reflecting elements that are reflected by a reflecting surface to pass through, and forms a real image of the object at a position symmetrical to the object with the light control panel as a center. A method,
When the light control panel is viewed in plan, a bisector that bisects the intersection angle between the first reflection surface and the second reflection surface of the light reflection element included in the light control panel, Crossing at one point on the light control panel, the light reflecting element is reflected once each by the first reflecting surface and the second reflecting surface in the light passing through the light reflecting element. An optical imaging method characterized by increasing light passing therethrough. The optical imaging method according to claim 6 , wherein a flat light-shielding portion where the light reflecting element is not disposed is formed around the one point where the bisectors intersect, and the object passes through the one point and the light shielding. An optical imaging method comprising: arranging a perpendicular perpendicular to a central axis as a central axis and placing the cross section in the light shielding part on one side of the light shielding part. Light from an object is reflected by the first reflecting surface, and further arranged in a pair with the first reflecting surface, and is arranged in a stepwise manner and crossed with the first reflecting surface in plan view. Optical imaging that uses a plate-like light control panel having a number of light reflecting elements that are reflected by a reflecting surface to pass through, and forms a real image of the object at a position symmetrical to the object with the light control panel as a center. A method,
The light control panel is divided into a plurality of divided light control panels in which the first reflective surface and the second reflective surface included are parallel to each other, and a center line of each of the divided light control panels in plan view is obtained. Two intersecting at one point on the light control panel and bisecting the angle of intersection between the first reflecting surface and the second reflecting surface of the light reflecting element on the center line in plan view The light reflection in which the equipartition line is made to coincide with the center line, and is reflected by the first reflecting surface and the second reflecting surface once in each of the divided light control panels. An optical imaging method, characterized in that a ratio of the light reflecting element that is reflected once by the first reflecting surface or the second reflecting surface and allows light to pass through the element is reduced. 9. The optical imaging method according to claim 8 , wherein a flat light-shielding portion where the light reflecting element is not disposed is formed around the one point where a center line of each of the divided light control panels intersects, and the object is placed on the one point. An optical imaging method, comprising: a cylindrical body having a perpendicular line passing through and perpendicular to the light shielding portion as a central axis and having a cross section as the light shielding portion on one side of the light shielding portion.

Images