JP2015143785A - Stereoscopic image display device and stereoscopic image display method - Google Patents

Stereoscopic image display device and stereoscopic image display method Download PDF

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JP2015143785A
JP2015143785A JP2014017274A JP2014017274A JP2015143785A JP 2015143785 A JP2015143785 A JP 2015143785A JP 2014017274 A JP2014017274 A JP 2014017274A JP 2014017274 A JP2014017274 A JP 2014017274A JP 2015143785 A JP2015143785 A JP 2015143785A
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JP6014063B2 (en
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誠 大坪
Makoto Otsubo
誠 大坪
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Asukanet Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a stereoscopic image display device and stereoscopic image display method capable of forming a stereoscopic image when viewing the device from the front.SOLUTION: The stereoscopic image display device includes a partial transmission mirror 14 in which light transmission parts 14a and light reflection parts 14b are mixed, provided at an incident side of a retroreflective material 13 formed by aligning a large number of cubic corner bodies 12 with their axes parallelized, where each cubic corner body 12 includes three reflection surfaces 17-19 orthogonally crossing with each other, and reflection light exits 11a at corner-part sides of the three reflection surfaces 17-19. Light from an object 26, passing through the light transmission parts 14a and reflected by the retroreflective material 13 is reflected by the light reflection parts 14b, exits from the reflection light exits 11a to the outside, and forms an image.

Description

本発明は立法体の３面を有するコーナーキューブ（以下、キュービックコーナー体と称する）を用いた立体像表示装置及び立体像表示方法に関する。 The present invention relates to a stereoscopic image display device and a stereoscopic image display method using a corner cube (hereinafter referred to as a cubic corner body) having three surfaces of a legislative body.

従来、立体画像を表示する装置及び方法として、特許文献１記載の立体像の表示装置、及び特許文献２記載の光学結像装置及び方法が知られている。特許文献１記載の技術は、多数のキュービックミラーを格子状に並べ、各キュービックミラーの一面で反射した光をキュービックミラーの直交面で反射させて、表示装置の反対側の空間に実像として立体像を形成させるものである。 Conventionally, as an apparatus and method for displaying a stereoscopic image, a stereoscopic image display apparatus described in Patent Document 1 and an optical imaging apparatus and method described in Patent Document 2 are known. In the technique described in Patent Document 1, a large number of cubic mirrors are arranged in a lattice pattern, and light reflected by one surface of each cubic mirror is reflected by an orthogonal surface of the cubic mirror to form a stereoscopic image as a real image in the space on the opposite side of the display device. Is formed.

また、特許文献２記載の光学結像装置６０は、図７に示すように、表裏面に対して直交する帯状の平面反射部６３、６４を多数備えた第１、第２の光制御部材６５、６６を、それぞれの平面反射部６３、６４が直交するようにして並べ、表裏面の一方側に配置された立体像６７を他方側に実像６８として形成するものであった。 In addition, as shown in FIG. 7, the optical imaging device 60 described in Patent Document 2 includes first and second light control members 65 each including a large number of strip-like planar reflecting portions 63 and 64 that are orthogonal to the front and back surfaces. , 66 are arranged so that the plane reflecting portions 63, 64 are orthogonal to each other, and a three-dimensional image 67 arranged on one side of the front and back surfaces is formed as a real image 68 on the other side.

特開２００９−３００６２３号公報JP 2009-300623 A ＷＯ２００９／１３１１２８号公報WO2009 / 131128 publication

しかしながら、特許文献２記載の光学結像装置６０（特許文献１記載の表示装置においても同じ）においては、立体像６７を表裏面に対して斜め方向に配置し、立体像６７からの光を入れて、表裏面から斜め方向に実像６８を形成させることが基本原理であるので、光学結像装置６０の表裏面の正面（対向位置）にある立体像の実像形成は困難であるという問題があった。
勿論、鏡等を置いて、結像位置を変えることは可能であるが、構造が複雑となり、全体として装置自体が厚みを有するという問題点があった。 However, in the optical imaging device 60 described in Patent Document 2 (the same applies to the display device described in Patent Document 1), the stereoscopic image 67 is arranged obliquely with respect to the front and back surfaces, and light from the stereoscopic image 67 is entered. Since the basic principle is to form the real image 68 obliquely from the front and back surfaces, there is a problem that it is difficult to form a real image of a stereoscopic image on the front (opposite position) of the front and back surfaces of the optical imaging device 60. It was.
Of course, it is possible to change the imaging position by placing a mirror or the like, but there is a problem that the structure becomes complicated and the apparatus itself has a thickness.

本発明はかかる事情に鑑みてなされたもので、装置を正面視して立体像（実像）を形成可能な立体像表示装置及び立体像表示方法を提供することを目的とする。 The present invention has been made in view of such circumstances, and an object thereof is to provide a stereoscopic image display device and a stereoscopic image display method capable of forming a stereoscopic image (real image) when the apparatus is viewed from the front.

前記目的に沿う第１の発明に係る立体像表示装置は、表裏に抜ける反射光出口をそれぞれ有するキュービックコーナー体を軸心を平行にして配置した再帰性反射材の入光側に、光反射部と光透過部が混在した部分透過ミラーを設け、前記光透過部を通って、前記再帰性反射材によって反射した対象物からの光を前記光反射部で再反射させ、前記反射光出口から外部に出光させて結像した。 The stereoscopic image display device according to the first invention that meets the above object is characterized in that a light reflecting portion is provided on a light incident side of a retroreflecting material in which cubic corner bodies each having reflected light exits that pass through the front and back are arranged in parallel. And a partially transmissive mirror in which a light transmissive portion is mixed, light from the object reflected by the retroreflecting material through the light transmissive portion is rereflected by the light reflective portion, and externally from the reflected light exit The light was emitted and imaged.

第１の発明に係る立体像表示装置において、前記キュービックコーナー体は、互いに直角に交わる３つの反射面（直角２等辺三角形の一部）を有し、該３つの反射面の角部側に前記反射光出口が設けられているのが好ましい。 In the stereoscopic image display device according to the first aspect of the present invention, the cubic corner body has three reflecting surfaces (a part of a right-angled isosceles triangle) intersecting at right angles to each other, and the corners of the three reflecting surfaces are on the corner side. A reflected light exit is preferably provided.

なお、部分透過ミラーの透光率（透過領域面積／全面積）は３０〜７０％の範囲であるのが好ましい。また、光透過部と光反射部の形状は多角形（三角形を含む）であるのが好ましいが、縞状、散在状であってもよい。一つの光透過部又は光反射部の大きさは、一つのキュービックコーナー体の入光面（例えば、正三角形の平面）の１／１０００〜１／５０程度（より好ましくは、１／２００〜１／５０）であるのが好ましい。 In addition, it is preferable that the transmissivity (transmission area area / total area) of the partial transmission mirror is in the range of 30 to 70%. Moreover, although it is preferable that the shape of a light transmission part and a light reflection part is a polygon (a triangle is included), it may be striped and scattered. The size of one light transmitting portion or light reflecting portion is about 1/1000 to 1/50 (more preferably 1/200 to 1) of the light incident surface (for example, a regular triangular plane) of one cubic corner body. / 50).

第１の発明に係る立体像表示装置において、前記反射光出口は、前記キュービックコーナー体の仮想角部から一定高さ位置まで除去されて形成されているのが好ましい。 In the stereoscopic image display device according to the first aspect of the present invention, it is preferable that the reflected light exit is formed by removing the reflected light exit from a virtual corner of the cubic corner body to a certain height position.

第１の発明に係る立体像表示装置において、前記キュービックコーナー体は該キュービックコーナー体の仮想角部を基準とした高さをｈとした場合、前記反射光出口が前記仮想角部から（０．３〜０．８）ｈの高さ範囲の位置に形成されているのが好ましい。 In the stereoscopic image display device according to the first aspect of the present invention, when the cubic corner body has a height relative to the virtual corner portion of the cubic corner body as h, the reflected light exit exits from the virtual corner portion (0. It is preferably formed at a position in the height range of 3 to 0.8) h.

第１の発明に係る立体像表示装置において、前記キュービックコーナー体は透明プラスチック又はガラスからなって、前記３つの反射面は鏡面処理が行われているのが好ましい。 In the stereoscopic image display device according to the first aspect of the present invention, it is preferable that the cubic corner body is made of transparent plastic or glass, and the three reflecting surfaces are mirror-finished.

そして、第２の発明に係る立体像表示方法は、互いに直角に交わる３つの反射面を有し、該３つの反射面の角部側に反射光出口が設けられたキュービックコーナー体を、該キュービックコーナー体の軸心を平行にして平面状に複数並べて再帰性反射材を形成し、前記再帰性反射材の入光面に光反射部と光透過部が混在した部分透過ミラーを配置した立体像表示装置を用い、前記キュービックコーナー体に前記光透過部から対象物からの光を入れて前記キュービックコーナー体で再帰反射をさせ、その再帰反射光を前記光反射部で反射させて、前記反射光出口から外部に出光して結像させる。 In the stereoscopic image display method according to the second invention, a cubic corner body having three reflecting surfaces intersecting at right angles to each other, and having a reflected light exit provided on a corner side of the three reflecting surfaces, is connected to the cubic corner body. A three-dimensional image in which a retroreflective material is formed by arranging a plurality of planar shapes in parallel with the axis of the corner body in parallel, and a partially transmissive mirror in which a light reflecting portion and a light transmitting portion are mixed is arranged on the light incident surface of the retroreflective material Using a display device, light from an object is put into the cubic corner body from the light transmitting portion, retroreflected by the cubic corner body, the retroreflected light is reflected by the light reflecting portion, and the reflected light Light is emitted from the exit to the outside to form an image.

第１、第２の発明に係る立体像表示装置及び立体像表示方法は、例えば、対象物（被写体及び光源を含む）からの光を再帰性反射材で入射方向に反射させ、再度部分透過ミラーで反射させているので、立体像表示装置に対して一方側の垂直位置に置いた立体像（対象物）を、立体像表示装置の他方側の垂直位置に実像として形成させることができる。
ここで、部分透過ミラーを使用することによって、通常のハーフミラーに比較して光を通過する領域と光を反射する領域を明確に分けることができ、設計製作が容易となる。 In the stereoscopic image display device and the stereoscopic image display method according to the first and second inventions, for example, light from an object (including a subject and a light source) is reflected in an incident direction by a retroreflecting material, and then a partially transmissive mirror is used again. Therefore, the stereoscopic image (object) placed at the vertical position on one side with respect to the stereoscopic image display device can be formed as a real image at the vertical position on the other side of the stereoscopic image display device.
Here, by using the partial transmission mirror, it is possible to clearly separate the region through which light passes and the region through which light is reflected, as compared with a normal half mirror, which facilitates design and manufacture.

従って、立体像表示装置を正面視して立体像を鑑賞することができ、装置全体の薄型化が可能となる。
特に、本発明においては、立体像表示装置の裏面側に配置された対象物（電気信号等による仮想画像も含む）を、立体像表示装置の表面側に結像できるので、例えば、携帯電話又は他のディスプレイに容易に利用できる。 Therefore, the stereoscopic image display apparatus can be viewed from the front and the stereoscopic image can be viewed, and the entire apparatus can be thinned.
In particular, in the present invention, an object (including a virtual image by an electric signal or the like) arranged on the back side of the stereoscopic image display device can be imaged on the surface side of the stereoscopic image display device. Easy to use for other displays.

（Ａ）は本発明の一実施の形態に係る立体像表示装置の正断面図、（Ｂ）は図１（Ａ）における矢視Ｋ−Ｋ拡大図である。(A) is a front sectional view of a stereoscopic image display device according to an embodiment of the present invention, and (B) is an enlarged view of arrow KK in FIG. 1 (A). 同立体像表示装置の底面図である。It is a bottom view of the same three-dimensional image display device. （Ａ）〜（Ｃ）はそれぞれ異なるタイプの部分透過ミラーの説明図である。(A)-(C) are explanatory drawings of the partial transmission mirror of a respectively different type. （Ａ）、（Ｂ）はそれぞれ同立体像表示装置の動作説明図である。(A), (B) is operation | movement explanatory drawing of the same stereoscopic image display apparatus, respectively. 同立体像表示装置のキュービックコーナー体の説明図である。It is explanatory drawing of the cubic corner body of the same three-dimensional image display apparatus. 同立体像表示装置の動作説明図である。It is operation | movement explanatory drawing of the same three-dimensional image display apparatus. 従来例に係る立体像表示装置の説明図である。It is explanatory drawing of the three-dimensional image display apparatus which concerns on a prior art example.

続いて、添付した図面を参照しながら、本発明を具体化した実施の形態について説明する。
図１（Ａ）、（Ｂ）、図２、図５に示すように、本発明の一実施の形態に係る立体像表示装置１０は、頂部１１が欠損して反射光出口１１ａを形成する多数のキュービックコーナー体１２が隙間なく隣接して配置された光制御部材１３と、光制御部材１３の入光側に設けられた部分透過ミラー１４とを有している。なお、キュービックコーナー体１２はコーナーキューブと称され、多数並べて再帰性反射材として一般に利用されている。なお、反射光出口１１ａはキュービックコーナー体１２の表裏を光が抜ける構造となっている。 Next, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in FIGS. 1A, 1B, 2 and 5, the stereoscopic image display apparatus 10 according to the embodiment of the present invention has a large number of reflected light exits 11a with the top portion 11 missing. The cubic corner body 12 has a light control member 13 disposed adjacently without a gap, and a partial transmission mirror 14 provided on the light incident side of the light control member 13. Note that the cubic corner body 12 is called a corner cube, and is generally used as a retroreflector by arranging a large number thereof. The reflected light exit 11a has a structure that allows light to pass through the front and back of the cubic corner body 12.

キュービックコーナー体１２は、ガラス又はプラスチックからなる透明体を主体とし、図４（Ａ）、（Ｂ）、図５に示すように立方体１６の直交する３つの面（反射面）１７〜１９を有している。３つの面１７〜１９は、直角２等辺三角形の頂部１１が一定の高さｈ１で水平に切除されている（図４（Ａ））。これによって、キュービックコーナー体１２は等脚台形からなる３つの面１７〜１９と、３つの面１７〜１９の底辺（又は天井辺）２０〜２２によって囲まれる正三角形２３と、３つの面１７〜１９の角部側の頂部平面２４とを有している。 The cubic corner body 12 is mainly a transparent body made of glass or plastic, and has three orthogonal surfaces (reflection surfaces) 17 to 19 of the cube 16 as shown in FIGS. 4 (A), (B), and FIG. doing. In the three surfaces 17 to 19, the apex 11 of the right isosceles triangle is horizontally cut at a constant height h1 (FIG. 4A). As a result, the cubic corner body 12 has three equilaterally trapezoidal surfaces 17 to 19, an equilateral triangle 23 surrounded by the bases (or ceiling sides) 20 to 22 of the three surfaces 17 to 19, and the three surfaces 17 to 17. 19 and a top plane 24 on the corner side.

図５においては、立方体１６の角部をそれぞれＡ〜Ｈとして以下の説明を行う。立方体１６の一陵（辺）の長さをａとし、ＡＥの中点をＱとすると、ＡＱ＝ａ／√２となり、ＱＣ＝ａ・√（３／２）、ＱＢ＝ａ／√２、ｃｏｓθ＝ＱＢ／ＱＣ＝１／√３となる。従って、キュービックコーナー体１２の仮想角部（立方体１６の角部Ｂ）を基準として、垂直に中心線ｍを配置した場合、水平面Ｎに対する各面１７〜１９の傾きθは、ａｒｃｃｏｓ（１／√３）≒５４．７３６度となる。 In FIG. 5, the following description will be given with the corners of the cube 16 being A to H, respectively. When the length of one side (side) of the cube 16 is a and the midpoint of AE is Q, AQ = a / √2, QC = a · √ (3/2), QB = a / √2, cos θ = QB / QC = 1 / √3. Therefore, when the center line m is arranged vertically with respect to the virtual corner portion of the cubic corner body 12 (corner portion B of the cube 16), the inclination θ of each of the surfaces 17 to 19 with respect to the horizontal plane N is arccos (1 / √ 3) ≈ 54.736 degrees.

キュービックコーナー体１２は中心線ｍを垂直にした場合、平面視して正三角形となるので、図１（Ａ）に示すように多数のキュービックコーナー体１２を軸心ｍを平行にして平面状に隙間なく敷きつめることができる。この場合、キュービックコーナー体１２の頂部には、図４（Ａ）に示すように角部Ｂから高さｈ１の位置で頂部１１を除去し、中心線ｍに垂直な頂部平面２４を形成している。この頂部平面２４はこの実施の形態においては表裏に抜ける反射光出口１１ａとなる。また、キュービックコーナー体１２の外側の面１７〜１９には鏡面処理（ハーフミラーではない、通常は蒸着処理によって）が行われて、反射面が形成される。これによって、光制御部材１３は入射光と反射光が水平又は垂直に対して同一角度（平行）にある再帰性反射材として機能する。 Since the cubic corner body 12 becomes a regular triangle in plan view when the center line m is vertical, as shown in FIG. 1 (A), the cubic corner bodies 12 are planarized with the axis m parallel. Can be laid without gaps. In this case, at the top of the cubic corner body 12, the top 11 is removed from the corner B at a height h1 as shown in FIG. 4A, and a top plane 24 perpendicular to the center line m is formed. Yes. In this embodiment, the top flat surface 24 becomes the reflected light exit 11a that passes through the front and back surfaces. Further, the outer surfaces 17 to 19 of the cubic corner body 12 are subjected to a mirror surface treatment (not a half mirror, usually by vapor deposition treatment) to form a reflection surface. Accordingly, the light control member 13 functions as a retroreflecting material in which incident light and reflected light are at the same angle (parallel) with respect to horizontal or vertical.

頂部平面２４を形成するカット高さｈ１は、キュービックコーナー体１２を中心線ｍを垂直にして立てた場合の角Ｂを基準とした高さｈ（＝ＢＳ）の０．３〜０．８倍（より好ましくは０．３５〜０．５倍）の高さとするのが好ましい。高さｈ１を大きくすると、キュービックコーナー体１２の反射面積が減少し、高さｈ１を小さくすると、反射光出口１１ａを通る反射光が減少し結像された実像の光量が不足する。 The cut height h1 that forms the top plane 24 is 0.3 to 0.8 times the height h (= BS) with the corner B as a reference when the cubic corner body 12 is erected with the center line m vertical. The height is preferably (more preferably 0.35 to 0.5 times). When the height h1 is increased, the reflection area of the cubic corner body 12 is decreased, and when the height h1 is decreased, the reflected light passing through the reflected light exit 11a is decreased and the amount of light of the formed real image is insufficient.

この状態で、多数敷きつめられたキュービックコーナー体１２によって構成される光制御部材１３の入光側は正三角形の平面１３ａ（入光面）から構成されるので、その上に部分透過ミラー１４を形成又は配置する。部分透過ミラー１４の一つを図１（Ｂ）に示すが、それぞれ多数の三角形の光透過部１４ａと三角形の光反射部１４ｂが隣り合って配置されている。部分透過ミラー１４は、光透過部１４ａにマスクをかけて非マスク部に銀、アルミニウム、チタン等の白色金属を蒸着して、その後マスクを除去して形成される。 In this state, since the light incident side of the light control member 13 constituted by the cubic corner bodies 12 arranged in a large number is composed of a regular triangular plane 13a (light incident surface), a partial transmission mirror 14 is formed thereon. Or arrange. One of the partial transmission mirrors 14 is shown in FIG. 1B, and a large number of triangular light transmission portions 14a and triangular light reflection portions 14b are arranged next to each other. The partial transmission mirror 14 is formed by masking the light transmission part 14a, evaporating a white metal such as silver, aluminum, titanium or the like on the non-mask part and then removing the mask.

光透過部１４ａと光反射部１４ｂの一辺の長さは、正三角形の平面１３ａの１／１０００〜１／５０程度（より好ましくは、１／２００〜１／５０）となっている。
光透過部１４ａと光反射部１４ｂの一辺の長さを小さくすると、製造が難しくなり、光の干渉が生じる。また、光透過部１４ａと光反射部１４ｂの一辺の長さを大きくすると、像が不鮮明になるので、適正範囲にするのが好ましいが、キュービックコーナー体１２の大きさによって異なるので、本発明はこの範囲に限定されるものではない。 The length of one side of the light transmission part 14a and the light reflection part 14b is about 1/1000 to 1/50 (more preferably 1/200 to 1/50) of the regular triangular plane 13a.
If the length of one side of the light transmission part 14a and the light reflection part 14b is reduced, manufacturing becomes difficult and light interference occurs. Further, if the length of one side of the light transmitting portion 14a and the light reflecting portion 14b is increased, the image becomes unclear, so it is preferable to set the appropriate range, but the present invention differs depending on the size of the cubic corner body 12, It is not limited to this range.

これによって、対象物（平面又は立体のディスプレイ画像を含む）２６からの光は部分透過ミラー１４の光透過部１４ａを介して光制御部材１３に入り、同一角度で反射するが、部分透過ミラー１４の光反射部１４ｂで反射し、反射光出口１１ａから出て、立体像表示装置１０の外側位置で実像２７を結像する。 As a result, light from the object 26 (including a flat or three-dimensional display image) 26 enters the light control member 13 through the light transmission portion 14a of the partial transmission mirror 14 and is reflected at the same angle. Is reflected by the light reflecting portion 14b, exits from the reflected light exit 11a, and forms a real image 27 at a position outside the stereoscopic image display device 10.

図３（Ａ）〜（Ｃ）には、部分透過ミラー１４の変形例を示すが、（Ａ）は光透過部１４ｃと光反射部ｄの形状を四角形としたもの、（Ｂ）は光透過部１４ｅと光反射部１４ｆの形状を縞状としたもの、（Ｃ）は多角形を同心状に配置して光透過部１４ｇと光反射部１４ｈを形成したものである。
それぞれの光透過部と光反射部の最小寸法は平面１３ａの１／１０００〜１／５０程度（より好ましくは、１／２００〜１／５０）とするのがよい。
この場合の部分透過ミラー１４の光透過率は５０％となるが、光透過部と光反射部の割り合い、又は形状を変えて４０〜６０％とすることもできる。 FIGS. 3A to 3C show modified examples of the partial transmission mirror 14. FIG. 3A shows a light transmission portion 14c and a light reflection portion d having a rectangular shape, and FIG. 3B shows light transmission. The part 14e and the light reflection part 14f are striped, and (C) is a polygon in which polygons are arranged concentrically to form a light transmission part 14g and a light reflection part 14h.
The minimum dimension of each light transmitting portion and light reflecting portion is preferably about 1/1000 to 1/50 (more preferably 1/200 to 1/50) of the plane 13a.
In this case, the light transmittance of the partial transmission mirror 14 is 50%, but the ratio or shape of the light transmission part and the light reflection part may be changed to 40 to 60%.

なお、キュービックコーナー体１２の入光側に直接部分透過ミラーを形成するのが好ましいが、光制御部材１３の入光側に光反射部を散在させた透明板材（シート材、フィルムを含む）を配置することもできる。この透明板材の裏面（場合によっては表面）に部分透過ミラーを形成することになる。
また、多数のキュービックコーナー体１２を並べた状態で金型成形すると共に、これらの入光面を連結する部材を透明にして、部分透過ミラーを形成する。各キュービックコーナー体１２の頂部（仮想角部）を切断して頂部平面２４を形成することもできる。 In addition, although it is preferable to form a partial transmission mirror directly on the light incident side of the cubic corner body 12, a transparent plate material (including a sheet material and a film) in which light reflecting portions are scattered on the light incident side of the light control member 13 is used. It can also be arranged. A partial transmission mirror is formed on the back surface (in some cases, the front surface) of the transparent plate.
In addition, a mold is formed in a state where a large number of cubic corner bodies 12 are arranged, and a member that connects these light incident surfaces is made transparent to form a partial transmission mirror. The top plane 24 can also be formed by cutting the top (virtual corner) of each cubic corner body 12.

続いて、この立体像表示装置１０の動作を説明し、本発明の一実施の形態に係る立体像表示方法についても説明する。
以上の構成となった立体像表示装置１０の表側に、図１、図４、図６に示すように、対象物２６を一定距離離しておくと、対象物２６からの光は、部分透過ミラー１４を通過して光制御部材１３に入光する。光制御部材１３自体は再帰性反射材となっているので、キュービックコーナー体１２の３つの面１７〜１９を介して入射方向に再帰性反射材で光（即ち、再帰反射光）を反射し、部分透過ミラー１４に届く。即ち、対象物２６からの光Ｌが、１）部分透過ミラー１４の光透過部１４ａを通り抜けて、２）面１９のＰ１点で反射、３）面１８のＰ２点で反射、４）面１７のＰ３点で反射する。面１７のＰ３点での反射光は、光Ｌと平行になり、部分透過ミラー１４の光反射部１４ｂであるＰ４点で反射して、反射光出口１１ａから外部に出て結像する。 Subsequently, the operation of the stereoscopic image display device 10 will be described, and a stereoscopic image display method according to an embodiment of the present invention will also be described.
As shown in FIGS. 1, 4, and 6, when the object 26 is separated by a certain distance on the front side of the stereoscopic image display apparatus 10 having the above configuration, the light from the object 26 is partially transmitted by the mirror. 14 enters the light control member 13. Since the light control member 13 itself is a retroreflective material, the light is reflected by the retroreflective material in the incident direction through the three surfaces 17 to 19 of the cubic corner body 12 (that is, retroreflected light), It reaches the partially transmissive mirror 14. That is, the light L from the object 26 passes through the light transmission part 14a of the partial transmission mirror 14, 2) reflected at the point P1 of the surface 19, 3) reflected at the point P2 of the surface 18, and 4) the surface 17 Reflected at point P3. The reflected light at the point P3 on the surface 17 is parallel to the light L, is reflected at the point P4 that is the light reflecting portion 14b of the partial transmission mirror 14, and is formed outside through the reflected light exit 11a.

部分透過ミラー１４の光透過部１４ａによって一部の光は透過するが、他の光は光反射部１４ｂで反射し、反射光出口１１ａから図１で示す下側（外部）に抜けて、実像（立体像）２７を結像する。この場合の実像２７は部分透過ミラー１４の光反射部１４ｂの反射率が高いほど、反射光出口１１ａの面積が大きい程、理論的には明るくなるが、部分透過ミラー１４の反射率を上げると対象物２６からの光が減少し、反射光出口１１ａの面積が大きくなると、再帰性反射材の機能が低下する。従って、部分透過ミラー１４の透過率は４０〜６０％に近い程良く、反射光出口１１ａの面積は正三角形２３の面積の２０〜３６％とするのがよい。正三角形２３の面積は高さｈ１の二乗に比例する。 Although a part of the light is transmitted by the light transmission part 14a of the partial transmission mirror 14, the other light is reflected by the light reflection part 14b and passes through the reflected light outlet 11a to the lower side (outside) shown in FIG. (Stereoscopic image) 27 is formed. The real image 27 in this case is theoretically brighter as the reflectance of the light reflecting portion 14b of the partial transmission mirror 14 is higher and the area of the reflected light exit 11a is larger, but when the reflectance of the partial transmission mirror 14 is increased. When the light from the object 26 decreases and the area of the reflected light exit 11a increases, the function of the retroreflecting material decreases. Therefore, the transmittance of the partial transmission mirror 14 is preferably close to 40 to 60%, and the area of the reflected light exit 11a is preferably 20 to 36% of the area of the equilateral triangle 23. The area of the equilateral triangle 23 is proportional to the square of the height h1.

なお、頂部をカットされていないキュービックコーナー体を軸心を平行にして平面状に並べて、光制御部材を設け、この光制御部材と対象物との間に、一枚のハーフミラー又は部分透過ミラーを斜めに配置すると、対象物からの光はハーフミラー又は部分透過ミラーを通過し、光制御部材内に進入して、再帰性反射を行い、ハーフミラー又は部分透過ミラーによって反射して、実像を形成することになるが、光制御部材と対象物の間でその外側位置に結像するので、実像を正面視できない。従って、本発明に係る立体像表示装置１０の場合は、実像を正面視できるので、より応用範囲が広い。 In addition, the cubic corner bodies whose tops are not cut are arranged in a plane with the axes parallel to each other, a light control member is provided, and a half mirror or a partial transmission mirror is provided between the light control member and the object. Is obliquely arranged, the light from the object passes through the half mirror or partial transmission mirror, enters the light control member, performs retroreflection, and is reflected by the half mirror or partial transmission mirror to produce a real image. Although it will be formed, an image is formed at the outer position between the light control member and the object, so that the real image cannot be viewed from the front. Therefore, in the case of the stereoscopic image display device 10 according to the present invention, since the real image can be viewed from the front, the application range is wider.

また、前記実施の形態においては、部分透過ミラーの代わりに、従来からのハーフミラーを使用することもできるが、ハーフミラーの場合、透光率の制御が難しく、部分透過ミラーの方が均一な製品を製造できる。
本発明は前記した実施の形態に限定されるものではなく、本発明の要旨を変更しない範囲でその構成を変更することもできる。 In the above embodiment, a conventional half mirror can be used instead of the partial transmission mirror. However, in the case of a half mirror, it is difficult to control the transmissivity, and the partial transmission mirror is more uniform. Can produce products.
The present invention is not limited to the above-described embodiment, and the configuration thereof can be changed without changing the gist of the present invention.

１０：立体像表示装置、１１：頂部、１１ａ：反射光出口、１２：キュービックコーナー体、１３：光制御部材、１３ａ：平面、１４：部分透過ミラー、１４ａ：光透過部、１４ｂ：光反射部、１４ｃ：光透過部、１４ｄ：光反射部、１４ｅ：光透過部、１４ｆ：光反射部、１４ｇ：光透過部、１４ｈ：光反射部、１６：立方体、１７〜１９：面、２０〜２２：底辺、２３：正三角形、２４：頂部平面、２６：対象物、２７：実像 10: Stereoscopic image display device, 11: Top portion, 11a: Reflected light exit, 12: Cubic corner body, 13: Light control member, 13a: Plane, 14: Partially transmitting mirror, 14a: Light transmitting portion, 14b: Light reflecting portion , 14c: light transmission part, 14d: light reflection part, 14e: light transmission part, 14f: light reflection part, 14g: light transmission part, 14h: light reflection part, 16: cube, 17-19: surface, 20-22 : Bottom, 23: equilateral triangle, 24: top plane, 26: object, 27: real image

Claims (6)

表裏に抜ける反射光出口をそれぞれ有するキュービックコーナー体を軸心を平行にして配置した再帰性反射材の入光側に、光反射部と光透過部が混在した部分透過ミラーを設け、前記光透過部を通って、前記再帰性反射材によって反射した対象物からの光を前記光反射部で再反射させ、前記反射光出口から外部に出光させて結像したことを特徴とする立体像表示装置。 Provided on the light incident side of the retroreflective material in which cubic corner bodies each having reflected light exits that pass through the front and back are arranged in parallel with each other are provided with a partially transmissive mirror in which a light reflecting portion and a light transmissive portion are mixed. A three-dimensional image display device characterized in that light from an object reflected by the retroreflecting material passes through a part, is re-reflected by the light reflecting part, and is emitted outside from the reflected light outlet to form an image. . 請求項１記載の立体像表示装置において、前記キュービックコーナー体は、互いに直角に交わる３つの反射面を有し、該３つの反射面の角部側に前記反射光出口が設けられていることを特徴とする立体像表示装置。 The stereoscopic image display device according to claim 1, wherein the cubic corner body includes three reflecting surfaces that intersect at right angles to each other, and the reflected light exit is provided on a corner portion side of the three reflecting surfaces. A three-dimensional image display device. 請求項２記載の立体像表示装置において、前記反射光出口は、前記キュービックコーナー体の仮想角部から一定高さ位置まで除去されて形成されていることを特徴とする立体像表示装置。 3. The stereoscopic image display device according to claim 2, wherein the reflected light exit is formed by removing the reflected light exit from a virtual corner portion of the cubic corner body to a certain height position. 請求項３記載の立体像表示装置において、前記キュービックコーナー体は該キュービックコーナー体の仮想角部を基準とした高さをｈとした場合、前記反射光出口が前記仮想角部から（０．３〜０．８）ｈの高さ範囲の位置に形成されていることを特徴とする立体像表示装置。 4. The stereoscopic image display device according to claim 3, wherein when the cubic corner body has a height with respect to the virtual corner portion of the cubic corner body as h, the reflected light exit extends from the virtual corner portion to (0.3). A stereoscopic image display device formed at a position in a height range of .about.0.8) h. 請求項２〜４のいずれか１項に記載の立体像表示装置において、前記キュービックコーナー体は透明プラスチック又はガラスからなって、前記３つの反射面は鏡面処理が行われていることを特徴とする立体像表示装置。 5. The stereoscopic image display device according to claim 2, wherein the cubic corner body is made of transparent plastic or glass, and the three reflecting surfaces are mirror-finished. Stereoscopic image display device. 互いに直角に交わる３つの反射面を有し、該３つの反射面の角部側に反射光出口が設けられたキュービックコーナー体を、該キュービックコーナー体の軸心を平行にして平面状に複数並べて再帰性反射材を形成し、前記再帰性反射材の入光面に光反射部と光透過部が混在した部分透過ミラーを配置した立体像表示装置を用い、前記キュービックコーナー体に前記光透過部から対象物からの光を入れて前記キュービックコーナー体で再帰反射をさせ、その再帰反射光を前記光反射部で反射させて、前記反射光出口から外部に出光して結像させることを特徴とする立体像表示方法。 A plurality of cubic corner bodies having three reflecting surfaces intersecting each other at right angles and having reflected light exits provided on the corners of the three reflecting surfaces are arranged in a plane with the axes of the cubic corner bodies being parallel. Using a stereoscopic image display device in which a retroreflective material is formed and a partial transmission mirror in which a light reflecting portion and a light transmitting portion are mixed is arranged on the light incident surface of the retroreflecting material, the light transmitting portion is provided in the cubic corner body. The light from the object is put in, retroreflected by the cubic corner body, the retroreflected light is reflected by the light reflecting portion, and emitted from the reflected light outlet to the outside to form an image. 3D image display method.
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