JPH09298760A - Stereoscopic photographing adapter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To previously invert the left and right sides of any one of stereo images for left eye and right eye by fetching the external image through two times of reflection through a mirror or a prism for the field of view on one side and through three times of reflection for the field of view on the opposite side. SOLUTION: A square pole shaped prism 1 is used for a right eye image and a perpendicular prism 2 is used for a left eye image. A mirror 3 is provided for the right eye image and the normal of its inclination is set to 50.4 deg. from an optical axis. A mirror 4 is provided for the left eye image and its normal is set at 52.5 deg. form the optical axis. A light beam (a) of the right eye image is reflected on the mirror 3, vertically made incident on a slope AB of the prism 1, reflected on a slope BC inside the prism, fully reflected on the slope AB again, vertically transmitted through a slope DA and made incident on a lens still as a vertical light beam. Namely, that light beam is made incident parallelly on the optical axis and that image is projected near the center of a screen. A light beam (d) of the left eye image is reflected on the mirror 4, turned to a horizontal light beam, made incident on the perpendicular prism 2, fully reflected on the slope at 45 deg., turned to a vertical light beam and made incident on the lens.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は写真撮影用カメラ又は家
庭用ホームビデオカメラに装着して使用する立体撮影用
アダプタに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic photographing adapter which is mounted on a camera for photographing or a home video camera for home use.

【０００２】[0002]

【従来の技術】従来主として写真撮影の分野で人間の左
右の目に対応する写真を撮ることによる立体撮影は行わ
れていた。立体撮影用のカメラ用アダプタ、立体撮影専
用の２眼カメラ、また使い捨てカメラ用の視野を２分割
するアダプタ等も商品化され、市販されている。市販さ
れているものの多くは写真を左右に２分割し、右目の画
面を写真の右に、左目の画面を写真の左に写し込むタイ
プであり、これを立体視するときは専用の眼鏡を使うか
または右目で右の画面を左目で左の画面を見る平行視と
呼ばれる見方を訓練して見るという方法であった。2. Description of the Related Art Conventionally, in the field of photography, stereoscopic photography has been performed by taking photographs corresponding to the left and right eyes of human beings. A camera adapter for stereoscopic photography, a twin-lens camera dedicated to stereoscopic photography, and an adapter for dividing a visual field for a disposable camera into two parts have been commercialized and are on the market. Most of the products on the market divide the photo into two parts, the right eye screen is shown on the right side of the photo, and the left eye screen is shown on the left side of the photo. Special glasses are used for stereoscopic viewing. Or the right eye was used to see the right screen and the left eye was used to see the left screen.

【０００３】また出願人は特願平７−３２２５８５にお
いて右目で左の画面を、左目で右の画面を見る交差視と
呼ばれる方法に対応する画像を撮影するための立体撮影
アダプタを提案している。この方法は画面が大きくなっ
ても裸眼で見ることが可能であるという利点がある。In addition, the applicant proposes in Japanese Patent Application No. 7-322585 a stereoscopic photographing adapter for photographing an image corresponding to a method called cross view in which the right eye sees the left screen and the left eye sees the right screen. . This method has the advantage that it can be seen with the naked eye even if the screen becomes large.

【０００４】[0004]

【発明が解決しようとする課題】しかし一眼レフカメラ
やビデオカメラの場合は撮影中にズームを使う場合が多
い。従来の方法でズームを使用した場合アダプタのミラ
ーが固定だと左右の画面の写っているところが違ってし
まうという問題を生ずる。そこで出願人は特願平７−３
２２５８５においてビデオカメラ用立体撮影アダプタで
ズームに対応するための調整機構を出願している。しか
したとえ調整をモータ等で行ったとしても一眼レフカメ
ラやビデオカメラのズームに常に追従することはできな
いのでシャッターチャンスを逃すことにもなる。However, in the case of single-lens reflex cameras and video cameras, zooming is often used during shooting. When zoom is used in the conventional method, if the mirror of the adapter is fixed, there occurs a problem that the left and right screens are different. Therefore, the applicant is Japanese Patent Application No. 7-3
22585 filed an application for an adjusting mechanism for zooming in a stereoscopic video camera adapter. However, even if the adjustment is performed by a motor or the like, it is not possible to always follow the zoom of the single-lens reflex camera or the video camera, so that a photo opportunity is missed.

【０００５】一方特開昭６３−２５３３２５において
「左眼用ステレオ画像または右眼用ステレオ画像のどち
らか一方をあらかじめ左右反転」する発明か公開されて
いる。これはステレオ画像を重ねたとき再生用テレビモ
ニターが真四角でないことによって発生するすれを防止
することを目的とする発明であるが、「左眼用ステレオ
画像または右眼用ステレオ画像のどちらか一方をあらか
じめ左右反転」するための具体的手段が示されていなか
った。On the other hand, Japanese Patent Laid-Open No. 63-253325 discloses an invention of "inverting left or right stereo image in right and left in advance". This is an invention that aims to prevent the occurrence of a blur caused by the fact that the playback TV monitor is not a square when the stereo images are overlaid. However, "either one of the left-eye stereo image or the right-eye stereo image is displayed. No specific means for "reversing left and right in advance" was shown.

【０００６】[0006]

【課題を解決するための手段】本発明はこれらの課題を
解決するためなされたものであり以下に説明する。ミラ
ーまたはプリズムを用いてレンズの光軸を中心に視野を
左右２つに分け、片側の視野はミラーまたはプリズムに
よる２回の反射を経て外部の画像を取り込みその反対側
の視野はミラーまたはプリズムによる３回の反射を経て
外部の画像を取り込むこととした。The present invention has been made to solve these problems and will be described below. The field of view is divided into two parts, left and right, centering on the optical axis of the lens by using a mirror or prism. One field of view captures an external image through two reflections by the mirror or prism, and the other field of view is by the mirror or prism. It was decided to capture an external image through three reflections.

【０００７】また３回反射する側の光路中に少なくとも
１個のプリズムを用い、プリズムのうち同じ１面を全反
射面及び透過面として用いることとした。また当該プリ
ズムを光路に沿って展開したときに平行平面板となるよ
う作るものとした。Further, at least one prism is used in the optical path on the side where the light is reflected three times, and the same one surface of the prism is used as the total reflection surface and the transmission surface. Further, the prism is made so as to become a plane parallel plate when developed along the optical path.

【０００８】さらに具体的には約６４度の内角Ａ、約３
２度の内角Ｂ、約１２９度の内角Ｃ、約１３５度の内角
Ｄをもち、内角Ａが内角Ｂの２倍である４角柱プリズム
であって内角Ｂと内角Ｃを結ぶ面に反射膜を施したプリ
ズムを用いることとした立体撮影アダプタである。More specifically, an internal angle A of about 64 degrees, about 3
It is a quadratic prism having an interior angle B of 2 degrees, an interior angle C of about 129 degrees, and an interior angle D of about 135 degrees, and the interior angle A is twice the interior angle B, and a reflection film is formed on the surface connecting the interior angle B and the interior angle C. It is a stereoscopic imaging adapter that uses a prism provided.

【０００９】[0009]

【作用】片側の視野は２回反射であるので正像が写るが
反対側の視野は３回反射であるので左右反転して写る。
そのため特開昭６３−２５３３２５で示される利点が得
られるのはいうまでもないが最大の利点はズームをした
場合にアダプタの調整の必要が無くなることである。Since the field of view on one side is reflected twice, a normal image is reflected, but the field of view on the other side is reflected three times, so that it is mirror-reversed.
Therefore, it goes without saying that the advantage shown in JP-A-63-253325 is obtained, but the greatest advantage is that the need for adjusting the adapter is eliminated when zooming.

【００１０】カメラあるいはビデオカメラでズーム操作
を行い望遠側にすると視野は中心付近に絞られる。その
とき左目側が２回反射側とすると、左目側の視野につい
ては中心付近に絞ることは左目側の視野の中の右側に絞
られることである。一方右目側が３回反射側であれば中
心付近に視野を絞る事は右目側の視野の中のやはり右側
に視野が絞られることになる。つまりズームを望遠側に
した場合に視野は左右とも右側に絞られるのでおなじ画
像を映すことになりミラーを調整する必要が無くなる。When the zoom operation is performed by the camera or the video camera to the telephoto side, the field of view is narrowed to the center. At that time, if the left-eye side is a double-reflection side, narrowing the visual field on the left-eye side near the center means narrowing it to the right side in the visual field on the left-eye side. On the other hand, if the right-eye side is the three-reflection side, narrowing the visual field near the center also narrows the visual field to the right side of the right-eye visual field. That is, when the zoom is set to the telephoto side, the field of view is narrowed to the right and left, so the same image is displayed, and it is not necessary to adjust the mirror.

【００１１】また３回反射を行うに当たりミラーを用い
ても良いのだがその場合光路が長くなりかなり大型にな
る。そこでプリズムを用いそのうち同じ１面を全反射及
び透過面として使用することとしたのでミラーを使って
３回反射をさせる場合に比べ大幅な小型化が可能とな
る。さらに当該プリズムを光路に沿って展開したときに
平行平面板となるようにしたので色収差の発生がない。A mirror may be used for performing the reflection three times, but in that case the optical path becomes long and the size becomes considerably large. Therefore, since it is decided to use the same one surface as a total reflection and transmission surface using a prism, it is possible to make the size much smaller than the case where a mirror is used to perform three reflections. Further, since the parallel flat plate is formed when the prism is developed along the optical path, no chromatic aberration occurs.

【００１２】具体的に約６４度の内角Ａ、約３２度の内
角Ｂ、約１２９度の内角Ｃ、約１３５度の内角Ｄをも
ち、内角Ａが内角Ｂの２倍である４角柱プリズムであっ
て内角Ｂと内角Ｃを結ぶ面に反射膜を施したプリズム１
を用いた場合光線は以下のように進行する。Specifically, it is a quadrangular prism having an interior angle A of about 64 degrees, an interior angle B of about 32 degrees, an interior angle C of about 129 degrees, and an interior angle D of about 135 degrees, and the interior angle A is twice the interior angle B. There is a prism 1 with a reflective film on the surface that connects interior angle B and interior angle C.
With, the ray travels as follows.

【００１３】前方から来た光はミラー３に反射されて例
えば面ＡＢに面の法線を基準として入射角２０度で入射
する。ガラス材が一般的なＢＫ７、屈折率約１．５２と
すると入射した光は出射角１３度でプリズム内に入り、
入射角１９．１度で面ＢＣに入射する。ここには反射コ
ーティングが施されているので光線は同じ１９．１度で
プリズム内に反射する。そして再び面ＡＢに入射角５
１．２度で入射する。ところが臨界角が４１．１度であ
りこれを上回るため光線は面ＡＢで全反射され出射角５
１．２度でプリズム内に反射される。そして面ＤＡに入
射角１３度で入射し、臨界角以下なので透過し、出射角
２０度で出射してレンズに入射する。The light coming from the front is reflected by the mirror 3 and is incident on the surface AB, for example, at an incident angle of 20 degrees with reference to the normal of the surface. If the glass material is a general BK7 and the refractive index is about 1.52, the incident light enters the prism at an exit angle of 13 degrees,
It is incident on the surface BC at an incident angle of 19.1 degrees. Since a reflective coating is applied here, light rays are reflected into the prism at the same 19.1 degree. Then, the incident angle 5 is again applied to the surface AB.
It is incident at 1.2 degrees. However, since the critical angle is 41.1 degrees and exceeds this, the ray is totally reflected by the surface AB and the exit angle is 5
It is reflected into the prism at 1.2 degrees. Then, it is incident on the surface DA at an incident angle of 13 degrees, is transmitted because it is less than the critical angle, is emitted at an emission angle of 20 degrees, and is incident on the lens.

【００１４】このように辺ＡＢを透過面かつ反射面とし
て使用しており反射面を迂回しないで透過できるのでミ
ラーを使用した場合に比べ大幅に小型化できる。また入
射角と出射角が同じ事からもわかるとおりこのような光
路で通過した場合本プリズムは平行平面板と等価である
ので色収差は発生しない。As described above, since the side AB is used as both the transmitting surface and the reflecting surface and the light can be transmitted without bypassing the reflecting surface, the size can be greatly reduced as compared with the case where the mirror is used. Further, as can be seen from the fact that the incident angle and the exit angle are the same, when passing through such an optical path, the present prism is equivalent to a plane-parallel plate and no chromatic aberration occurs.

【００１５】[0015]

【実施例】以下図面を参照しながら本発明の実施例を説
明する。図１は本発明の第１の実施例の上面断面図、図
２は本発明の第１の実施例の正面図である。図中１は本
発明にかかる四角柱プリズムであり上面から見たときそ
の内角は６４．２度（Ａ）、３２．１度（Ｂ）、１２
８．７度（Ｃ）、１３５度（Ｄ）となっている。本実施
例では右目映像用に用いている。２は直角プリズムであ
り左目映像用に用いている。Embodiments of the present invention will be described below with reference to the drawings. 1 is a top sectional view of a first embodiment of the present invention, and FIG. 2 is a front view of the first embodiment of the present invention. In the figure, reference numeral 1 is a quadrangular prism according to the present invention, and when viewed from above, its internal angle is 64.2 degrees (A), 32.1 degrees (B), 12
It is 8.7 degrees (C) and 135 degrees (D). In this embodiment, it is used for the right eye image. Reference numeral 2 is a right-angle prism, which is used for the left-eye image.

【００１６】３、４はミラーであり、３は右目映像用で
その傾きはその法線が光軸から５０．４度に設定されて
いる。４は左目映像用でその法線が光軸から５２．５度
に設定されている。５，６はミラー固定板、７はベー
ス、８は全体をカメラ、ビデオカメラ等の先端部に固定
するためのアダプタであり、フィルタ等と同様な方法で
固定できるようになっている。Reference numerals 3 and 4 are mirrors, 3 is for a right-eye image, and its inclination is set such that its normal is 50.4 degrees from the optical axis. No. 4 is for the left-eye image, and its normal is set to 52.5 degrees from the optical axis. Reference numerals 5 and 6 are mirror fixing plates, 7 is a base, and 8 is an adapter for fixing the whole to a tip portion of a camera, a video camera or the like, which can be fixed by a method similar to that of a filter or the like.

【００１７】本実施例ではカメラの画角を片側３０度、
立体映像の画角を片側１５度として設計してある。また
プリズム１，２の材質の屈折率を１．５２としてある。
全体の幅は約１３０ｍｍであり、特願平７−３２２５８
５の実施例では約２００ｍｍだったのでかなり小型化さ
れている。In this embodiment, the angle of view of the camera is 30 degrees on one side,
The angle of view of the stereoscopic image is designed to be 15 degrees on one side. The refractive index of the material of the prisms 1 and 2 is 1.52.
The overall width is about 130 mm, and Japanese Patent Application No. 7-32258
In the fifth embodiment, the size is about 200 mm, so the size is considerably reduced.

【００１８】次に光線の経路について説明する。立体画
像の最大画角である右側１５度の方向から入射する光線
を考えると右目映像は光線ａ、左目映像は光線ｄとな
る。光線ａはミラー３に入射角６５．４度で入射し反射
する。次にプリズム１の斜面ＡＢに垂直に入射し、プリ
ズム内で斜面ＢＣに３２．１度で入射、反射し再び斜面
ＡＢに内側から入射角６４．２度で入射するが臨界角４
１．１度を越えるので全反射し、斜面ＤＡを垂直に透過
して垂直光線のままレンズに入射する。つまり光軸と平
行に入射するのでこの光線による画像は画面の中心付近
に写ることになる。Next, the path of light rays will be described. Considering a light ray incident from the direction of 15 degrees on the right side, which is the maximum angle of view of a stereoscopic image, the right-eye image is the light ray a and the left-eye image is the light ray d. The light ray a is incident on the mirror 3 at an incident angle of 65.4 degrees and is reflected. Next, the light is vertically incident on the slope AB of the prism 1, is incident on the slope BC at 32.1 degrees within the prism, is reflected, and is again incident on the slope AB from the inside at an incident angle of 64.2 degrees, but the critical angle is 4 degrees.
Since it exceeds 1.1 degrees, it is totally reflected, passes through the slope DA vertically, and enters the lens as a vertical ray. In other words, since the light is incident parallel to the optical axis, the image formed by this light ray appears near the center of the screen.

【００１９】同じ方向から来た左目映像の光線ｄはミラ
ー４に入射角３７．５度で入射反射し、水平光線となっ
て直角プリズム２に入射し４５度斜面で全反射されて垂
直光線となってレンズに入射する。この場合も映像の中
心付近に像を結ぶことになる。The light ray d of the left-eye image coming from the same direction is incident and reflected on the mirror 4 at an incident angle of 37.5 degrees, becomes a horizontal ray, enters the rectangular prism 2 and is totally reflected on a 45 degree inclined surface to become a vertical ray. And enters the lens. In this case as well, the image is formed near the center of the image.

【００２０】左右片側１５度の範囲の光線は上記と同様
の経路を通り、各面での入射、出射角は以下のようにな
る。 経路 左１５度 中央 右１５度 右ミラー ３５．４ ５０．４ ６５．４ 右プリズムＡＢ面入射 ３０ １５ ０ 右プリズムＡＢ面出射 １９．２ ９．８ ０ 右プリズムＢＣ面 １２．９ ２２．３ ３２．１ 右プリズムＡＢ面 ４５ ５４．４ ６４．２ 右プリズムＤＡ面入射 １９．２ ９．８ ０ 右プリズムＤＡ面出射 ３０ １５ ０ 左ミラー ６７．５ ５２．５ ３７．５ 左プリズム垂直面入射 ３０ １５ ０ 左プリズム垂直面出射 １９．２ ９．８ ０ 左プリズム斜面 ６４．２ ５４．８ ４５ 左プリズム底面入射 １９．２ ９．８ ０ 左プリズム底面出射 ３０ １５ ０ またこの光路にそってプリズム１を展開すると図３のよ
うになり平行平面板と等価であることがわかる。Light rays in the range of 15 ° on one side on either side pass through the same path as above, and the incident and exit angles on each surface are as follows. Path Left 15 degrees Center right 15 degrees Right mirror 35.4 50.4 65.4 Right prism AB plane incident 30 15 0 Right prism AB plane exit 19.2 9.8 0 Right prism BC plane 12.9 22.3 32 .1 Right prism AB surface 45 54.4 64.2 Right prism DA surface incidence 19.2 9.8 0 Right prism DA surface emission 30 15 0 Left mirror 67.5 52.5 37.5 Left prism vertical surface incidence 30 15 0 Left prism vertical plane exit 19.2 9.8 0 Left prism slope 64.2 54.8 45 Left prism bottom entrance 19.2 9.8 0 Left prism bottom exit 30 15 0 Also prism 1 along this optical path When is expanded, it becomes as shown in FIG. 3, and it can be seen that it is equivalent to a plane parallel plate.

【００２１】図４は本発明の第２の実施例であり３回反
射側のプリズム１を６０度、３０度の角をもつ直角三角
プリズムとしてある。また、２回反射側の直角プリズム
２は斜面に反射膜を施し、ミラーとして用いている。ま
た２回反射側のミラー４の傾きは第１の実施例と同じで
あるが３回反射側のミラー３の傾きは５２．５度とな
る。この場合両プリズムとも直角プリズムであるので製
作、組立が容易であるという利点がある。FIG. 4 shows a second embodiment of the present invention in which the prism 1 on the three-reflection side is a right-angled triangular prism having angles of 60 degrees and 30 degrees. Further, the right-angled prism 2 on the twice-reflection side has a reflection film on the slope and is used as a mirror. The tilt of the mirror 4 on the twice-reflection side is the same as that of the first embodiment, but the tilt of the mirror 3 on the three-reflection side is 52.5 degrees. In this case, both prisms are right-angled prisms, which is advantageous in that they can be easily manufactured and assembled.

【００２２】この場合の光路も第１の実施例と同様であ
り、光線の入射角等は下記のようになる。 経路 左１５度 中央 右１５度 右ミラー ５２．５ ６７．５ ８２．５ 右プリズムＡＢ面入射 ３０ １５ ０ 右プリズムＡＢ面出射 １９．２ ９．８ ０ 右プリズムＢＣ面 １０．８ ２０．２ ３０ 右プリズムＡＢ面 ４０．８ ５０．２ ６０ 右プリズムＤＡ面入射 １９．２ ９．８ ０ 右プリズムＤＡ面出射 ３０ １５ ０ 左ミラー ６７．５ ５２．５ ３７．５ 左プリズム斜面 ７５ ６０ ４５The optical path in this case is also the same as that of the first embodiment, and the incident angle of light rays and the like are as follows. Path Left 15 degrees Center right 15 degrees Right mirror 52.5 67.5 82.5 Right prism AB plane entrance 30 15 0 Right prism AB plane exit 19.2 9.8 0 Right prism BC plane 10.8 20.2 30 Right prism AB surface 40.8 50.2 60 Right prism DA surface incidence 19.2 9.8 0 Right prism DA surface exit 30 15 0 Left mirror 67.5 52.5 37.5 Left prism slope 75 60 60 45

【００２２】また３回反射側のプリズムを光路に従って
展開すると図５のようになり平行平面板と等価であり、
色収差は発生しない。When the prism on the three-reflection side is expanded along the optical path, it becomes as shown in FIG. 5, which is equivalent to a plane parallel plate.
No chromatic aberration occurs.

【００２３】上記各実施例に示すアダプタを装着した場
合の再生像の鑑賞は片側の画面が左右反転しているので
裸眼で見ることは不可能であるが図６に示す特開昭６３
−２５３３２５に例示されている倒立プリズム９等を用
いた方法で行うことができる。When the adapter shown in each of the above embodiments is attached, the reproduced image cannot be viewed with the naked eye because the screen on one side is flipped horizontally, but it is not possible to see it with the naked eye.
It can be performed by a method using the inverted prism 9 and the like exemplified in −253325.

【００２４】さらにより簡易な方法として図７のように
画面の分割されているところにミラー１０を垂直にた
て、そのミラー１０が両目間にくるような位置で鑑賞す
る方法がある。この方法は構成が簡単でまた誰でも比較
的容易に立体視ができるという利点がある。一方画面と
鑑賞位置が固定されているので鑑賞中に自由がきかな
い、画面が大きいと大きなミラーが必要になる等の問題
点もある。As a simpler method, there is a method of vertically placing the mirror 10 in a divided screen as shown in FIG. 7 and viewing at a position where the mirror 10 is located between both eyes. This method has the advantages that the configuration is simple and that anyone can view stereoscopically with relative ease. On the other hand, since the screen and the viewing position are fixed, there is a problem in that there is no freedom during viewing, and a large screen requires a large mirror.

【００２５】さらに簡易な方法として図８のよう片方の
眼のわずかに内側に３ｃｍ四方程度のミラー１１を垂直
に置き、ミラー１１のある側の目でミラー１１に映った
左右反転像を、ミラー１１の無い側では直接正立像を見
るという方法がある。この方法は特開昭６３−２５３３
２５の倒立プリズムよりさらに簡易な１枚のミラーで鑑
賞可能となるところにメリットがある。ただし小さいミ
ラーで反転像を見るためには両眼を交差視のように寄せ
る必要があり、誰でもが容易にできる方法ではない。As a simpler method, as shown in FIG. 8, a mirror 11 of about 3 cm square is vertically placed slightly inside one eye, and a left-right inverted image reflected on the mirror 11 by the eye with the mirror 11 On the side without 11, there is a method to see the erect image directly. This method is disclosed in JP-A-63-2533.
There is a merit that it can be viewed with a single mirror that is simpler than the 25 inverted prisms. However, in order to see an inverted image with a small mirror, it is necessary to bring both eyes close to each other as if they were crossing, and this is not a method that anyone can easily do.

【００２６】以上のように本立体アダプタで撮影された
画像を立体視する方法については様々な方法があり各個
人に最も合った方法を選択することができる。なおいず
れの方法でも左右反転する側を撮影時と合わせる必要が
ある。各実施例については撮影時も鑑賞時も右目側映像
を反転する場合を示した。As described above, there are various methods for stereoscopically viewing the image taken by the stereoscopic adapter, and the method most suitable for each individual can be selected. In either method, it is necessary to match the left-right inverted side with the time of shooting. In each of the examples, the case where the right-eye side image is reversed during shooting and viewing is shown.

【００２７】[0027]

【発明の効果】以上詳細に説明したように本発明によれ
ば片側の視野は２回反射であるので正像が写るが反対側
の視野は３回反射であるので左右反転して写る。そのた
め再生画像を表示する際曲率のあるようなテレビモニタ
ーで再生したとしても倒立像を折り返すため左右の画像
を正確に重ね合わすことができ立体像の違和感を低減す
る事ができる。As described above in detail, according to the present invention, since the visual field on one side is reflected twice, a normal image is shown, but the visual field on the opposite side is reflected three times, so that the image is horizontally reversed. Therefore, even when a reproduced image is displayed on a TV monitor having a curvature, the inverted image is folded back so that the left and right images can be accurately overlapped with each other, and the sense of discomfort in the stereoscopic image can be reduced.

【００２８】またカメラあるいはビデオカメラでズーム
操作を行い望遠側にすると視野は中心付近に絞られ、そ
のとき左目側が２回反射側とすると、左目側の視野につ
いては中心付近に絞られることは左目側の視野の中の右
側に絞られることであり一方右目側が３回反射側であれ
ば中心付近に視野が絞られる事は右目側の視野の中のや
はり右側に視野が絞られることになり、つまりズームを
望遠側にした場合に視野は左右とも右側に絞られるので
おなじ画像を映すことになりズームを変化させてもミラ
ー調整無く立体像を撮影することができる。When the camera or the video camera is used for zooming to the telephoto side, the field of view is narrowed to the center, and when the left-eye side is the double reflection side, the left-eye side is narrowed to the center to the left eye. Is narrowed to the right side of the field of view of the right eye, while on the other hand, if the right eye side is three reflection side, the field of view is narrowed to the center, which means that the field of view of the right eye is also narrowed to the right side. That is, when the zoom is set to the telephoto side, the field of view is narrowed to the right and left, so the same image is displayed, and even if the zoom is changed, a stereoscopic image can be taken without mirror adjustment.

【００２９】また３回反射を行うに当たりプリズムを用
い、そのうち同じ１面を全反射及び透過面として使用す
ることとし、反射面を迂回しないで透過できるのでミラ
ーを使って３回反射をさせる場合に比べ大幅な小型化が
可能となる。さらに当該プリズムを光路に沿って展開し
たときに平行平面板となるようにしたので色収差の発生
がない。In addition, a prism is used to perform three reflections, and the same one surface is used as the total reflection and transmission surfaces. Since the light can be transmitted without bypassing the reflection surface, when three reflections are performed using a mirror. Compared to this, it is possible to make it much smaller. Further, since the parallel flat plate is formed when the prism is developed along the optical path, no chromatic aberration occurs.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の第１の実施例の上面断面図FIG. 1 is a top sectional view of a first embodiment of the present invention.

【図２】本発明の第１の実施例の正面図FIG. 2 is a front view of the first embodiment of the present invention.

【図３】本発明の第１の実施例に用いるプリズムの光路
展開図FIG. 3 is an optical path development view of a prism used in the first embodiment of the present invention.

【図４】本発明の第２の実施例の上面断面図FIG. 4 is a cross-sectional top view of the second embodiment of the present invention.

【図５】本発明の第２の実施例に用いるプリズムの光路
展開図FIG. 5 is an optical path development view of a prism used in a second embodiment of the present invention.

【図６】本発明の立体撮影アダプタにより撮影した画像
の第１の鑑賞方法説明図FIG. 6 is an explanatory view of a first viewing method of an image taken by the stereoscopic shooting adapter of the present invention.

【図７】本発明の立体撮影アダプタにより撮影した画像
の第２の鑑賞方法説明図FIG. 7 is an explanatory diagram for a second viewing method of an image taken by the stereoscopic shooting adapter of the present invention.

【図８】本発明の立体撮影アダプタにより撮影した画像
の第３の鑑賞方法説明図FIG. 8 is an explanatory diagram of a third viewing method of an image taken by the stereoscopic shooting adapter of the present invention.

【符号の説明】[Explanation of symbols]

１ プリズム ２ 直角プリズム ３、４ ミラー ５、６ ミラー取付板 ７ ベース ８ アダプタ ９ 倒立プリズム １０、 １１ 観賞用ミラー 1 Prism 2 Right angle prism 3,4 Mirror 5,6 Mirror mounting plate 7 Base 8 Adapter 9 Inverted prism 10, 11 Ornamental mirror

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】ミラーまたはプリズムを用いてレンズ１の
光軸を中心に視野を左右２つに分け、片側の視野はミラ
ーまたはプリズムによる２回の反射を経て外部の画像を
取り込みその反対側の視野はミラーまたはプリズムによ
る３回の反射を経て外部の画像を取り込むことを特徴と
する立体撮影アダプタ。1. A mirror or a prism is used to divide the visual field into two right and left with the optical axis of the lens 1 as the center, and the visual field on one side captures an external image through two reflections by the mirror or prism and captures an external image. The field of view is a stereoscopic photography adapter characterized by capturing an external image after being reflected three times by a mirror or prism. 【請求項２】ミラーまたはプリズムを用いてレンズ１の
光軸を中心に視野を２つに分け、片側の視野はミラーま
たはプリズムによる２回の反射を経て外部の画像を取り
込みその反対側の視野はミラーまたはプリズムによる３
回の反射を経て外部の画像を取り込む立体撮影アダプタ
において３回反射する側の光路中に少なくとも１個のプ
リズムを用い、プリズムのうち同じ１面を全反射面及び
透過面として用いることを特徴とする立体撮影アダプ
タ。2. A mirror or prism is used to divide the field of view into two parts centering on the optical axis of the lens 1. One field of view captures an external image through two reflections by the mirror or prism and the other field of view. 3 by mirror or prism
In a stereoscopic photography adapter that captures an external image through multiple reflections, at least one prism is used in the optical path on the side that reflects three times, and one of the prisms is used as a total reflection surface and a transmission surface. 3D shooting adapter. 【請求項３】ミラーまたはプリズムを用いてレンズ１の
光軸を中心に視野を２つに分け、片側の視野はミラーま
たはプリズムによる２回の反射を経て外部の画像を取り
込みその反対側の視野はミラーまたはプリズムによる３
回の反射を経て外部の画像を取り込む立体撮影アダプタ
であって３回反射する側の光路中に少なくとも１個のプ
リズムを用い、プリズムのうち同じ１面を全反射面及び
透過面として用いる立体撮影アダプタにおいて当該プリ
ズムを光路に沿って展開したときに平行平面板となるこ
とを特徴とする立体撮影アダプタ。3. A mirror or prism is used to divide the field of view into two parts centering on the optical axis of the lens 1. One field of view captures an external image through two reflections by the mirror or prism and the other field of view. 3 by mirror or prism
Stereoscopic imaging adapter that captures an external image through multiple reflections and uses at least one prism in the optical path on the side that reflects three times, and uses the same one surface of the prisms as a total reflection surface and a transmission surface. A stereoscopic imaging adapter, which becomes a plane parallel plate when the prism is developed along the optical path in the adapter. 【請求項４】約６４度の内角Ａ、約３２度の内角Ｂ、約
１２９度の内角Ｃ、約１３５度の内角Ｄをもち、内角Ａ
が内角Ｂの２倍である４角柱プリズムであって内角Ｂと
内角Ｃを結ぶ面に反射膜を施したプリズムを用いること
を特徴とする立体撮影アダプタ。4. An interior angle A having an interior angle A of about 64 degrees, an interior angle B of about 32 degrees, an interior angle C of about 129 degrees, and an interior angle D of about 135 degrees.
Is a quadratic prism having twice the internal angle B, and a prism having a reflecting film on the surface connecting the internal angle B and the internal angle C is used.