【０００１】[0001]
【産業上の利用分野】この発明は、自動車等に用いられ
る後方視認装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear visual recognition device used in automobiles and the like.
【０００２】[0002]
【従来の技術】従来、自動車等において後方を視認する
ために、フロントフェンダー又はサイドドアに突設した
バックミラーが用いられている。また、テレビカメラを
車体後部に配設して後方の情景を撮影させ、その画像を
ダッシュボードに配設したテレビ画面に写し出すように
したものもある。2. Description of the Related Art Conventionally, a front fender or a rearview mirror protruding from a side door has been used for visually recognizing the rear of an automobile or the like. There is also a TV camera installed in the rear part of the vehicle body to photograph the scene behind and display the image on the TV screen installed on the dashboard.
【０００３】[0003]
【発明が解決しようとする課題】ところが、運転者がフ
ロントフェンダー又はサイドドアに突設したバックミラ
ーを見るためには、視線を大きく動かさなければなら
ず、そのため前方への注意がおろそかになるという問題
がある。また、テレビカメラを用いたものは高価である
という難点がある。However, in order for the driver to see the rearview mirror protruding from the front fender or the side door, he or she has to move his or her line of sight greatly, which neglects the attention to the front. There's a problem. Further, there is a drawback that the one using a television camera is expensive.
【０００４】[0004]
【課題を解決するための手段】本発明では、自動車の車
体等の外部に、互いに直交した２個の平面部と、これら
にそれぞれ45°で交差する斜面部とを有する直角二等辺
三角形断面の外部プリズムを配設すると共に、同車体等
の内部に、互いに直交した２個の平面部と、これらにそ
れぞれ 112.5°で交差する２個の斜面部と、各斜面部の
後端に形成した平面部よりなる五角形断面を有する内部
プリズムを配設して、車体等の後方からの光線を外部プ
リズムの斜面部で全反射させて内部プリズムに投射さ
せ、外部プリズムからの光線を、内部プリズムの２個の
斜面部で各１回全反射させて後方に投射させるべく構成
してなる後方視認装置を提供せんとするものである。According to the present invention, an isosceles right triangle cross section having two plane portions orthogonal to each other and slope portions intersecting each other at 45 ° is provided on the outside of the body of an automobile or the like. In addition to the external prism, inside the same car body, etc., two planes orthogonal to each other, two slopes intersecting each at 112.5 °, and a plane formed at the rear end of each slope An internal prism having a pentagonal cross section is arranged so that a light ray from the rear of a vehicle body or the like is totally reflected by the inclined surface portion of the external prism and projected onto the internal prism. An object of the present invention is to provide a rear-viewing device configured to perform total reflection once on each of the slopes and project the light backward.
【０００５】[0005]
【実施例】本発明の実施例を、本発明を自動車に適用し
たものを例にとり、添付図を参照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described with reference to the accompanying drawings by taking the application of the present invention to an automobile as an example.
【０００６】図１は、本発明に係る後方視認装置Ａを自
動車に適用した場合の構成を示しており、同装置Ａは自
動車の車体Ｂの前部外側面に突設した外部プリズム１
と、ダッシュボード２の運転席５前方位置に配設した内
部プリズム３とで構成されている。FIG. 1 shows the configuration of a rear view device A according to the present invention applied to an automobile. The device A is an external prism 1 projectingly provided on a front outer surface of a vehicle body B of the automobile.
And an internal prism 3 arranged in front of the driver's seat 5 of the dashboard 2.
【０００７】図２は外部プリズム１及び内部プリズム３
を示しており、外部プリズム１は、互いに直角に交差し
た平面部 11,12とこれらに45°で交差する斜面部13より
なる直角二等辺三角形断面を有しており、平面部12から
入射した後方からの光線L1を斜面部13で全反射して、平
面部11から内部プリズム３方向に投射するものである。FIG. 2 shows an outer prism 1 and an inner prism 3.
The outer prism 1 has a right-angled isosceles triangular cross-section consisting of flat surface portions 11 and 12 intersecting each other at a right angle and inclined surface portions 13 intersecting each other at 45 °, and is incident from the flat surface portion 12. The light ray L1 from the rear is totally reflected by the inclined surface portion 13 and projected from the flat surface portion 11 toward the internal prism 3.
【０００８】内部プリズム３は直交した二つの平面部 3
1,32と、これらにそれぞれ 112.5°で交差する斜面部 3
3,34と、斜面部 33,34の後部に形成した平面部35よりな
る五角形断面を有しており、平面部31から入射した外部
プリズム１からの光線L2を斜面部33で全反射し、次いで
斜面部34で全反射して平面部32から後方の運転席方向の
投射L3するものである。The inner prism 3 has two plane portions 3 which are orthogonal to each other.
1,32 and the slopes that intersect these at 112.5 ° 3
It has a pentagonal cross section composed of a flat portion 35 formed at the rear portion of the inclined surface portions 33, 34 and 3, 34, and the light ray L2 from the external prism 1 incident from the flat portion 31 is totally reflected at the inclined portion 33, Next, the light is totally reflected by the slope portion 34 and is projected L3 from the flat portion 32 toward the rear driver's seat.
【０００９】したがって、車体Ｂ後方の情景は、外部プ
リズム１で１回全反射して内部プリズム３に投射され、
内部プリズム３の斜面部33、34で各１回全反射して平面
部32の前方に像を結ぶことになり、内部プリズム３が運
転席５前方のダッシュボード２に配設されているので、
運転者が視線を大きく動かさなくても後方の情景を視認
することができる。Therefore, the scene behind the vehicle body B is totally reflected once by the outer prism 1 and projected onto the inner prism 3.
The inclined surfaces 33 and 34 of the internal prism 3 totally reflect once to form an image in front of the flat portion 32, and since the internal prism 3 is arranged on the dashboard 2 in front of the driver's seat 5,
The driver can see the scene behind without having to move his or her line of sight significantly.
【００１０】[0010]
【発明の効果】自動車の車体等の外部に、互いに直交し
た２個の平面部と、これらにそれぞれ45°で交差する斜
面部とを有する直角二等辺三角形断面の外部プリズムを
配設すると共に、同車体等の内部に、互いに直交した２
個の平面部と、これらにそれぞれ 112.5°で交差する２
個の斜面部と、各斜面部の後端に形成した平面部よりな
る五角形断面を有する内部プリズムを配設して、車体等
の後方からの光線を外部プリズムの斜面部で全反射させ
て内部プリズムに投射させ、外部プリズムからの光線
を、内部プリズムの２個の斜面部で各１回全反射させて
後方に投射させるべく構成したことによって、車体Ｂ後
方の情景は、内部プリズム３の平面部32の前方に像を結
ぶことになり、運転者は視線を大きく動かさなくても後
方の情景を視認することができる。An external prism having a right-angled isosceles triangular cross section having two plane portions orthogonal to each other and slope portions intersecting each other at 45 ° is provided outside the vehicle body of an automobile, and the like. Inside the same car body, etc.
2 planes and intersect each at 112.5 ° 2
An internal prism having a pentagonal cross section consisting of individual sloped surfaces and a flat surface formed at the rear end of each sloped surface is disposed, and the light rays from the rear of the vehicle body etc. are totally reflected by the sloped surface of the external prism and By projecting the light rays from the external prism on the prism and reflecting the light rays from the external prism once on each of the two inclined surfaces of the internal prism and projecting the light rays backward, the scene behind the vehicle body B is the plane of the internal prism 3. By forming an image in front of the section 32, the driver can visually recognize the scene behind without having to move his or her line of sight significantly.
【００１１】特に、車体Ｂ後方からの光線は、外部プリ
ズム１で１回、内部プリズム３で２回、計３回（奇数
回）全反射して運転者に到達することになる。このよう
に、車体Ｂ後方からの光線を３回反射させているので、
反射像の左右が車体等の左右と一致するので、後方視野
の左右を誤認するのを防止することができる。In particular, the light beam from the rear of the vehicle body B reaches the driver after being totally reflected once by the outer prism 1 and twice by the inner prism 3 (an odd number). In this way, since the light rays from the rear of the vehicle body B are reflected three times,
Since the left and right of the reflected image match the left and right of the vehicle body and the like, it is possible to prevent the left and right of the rear visual field from being mistakenly recognized.
【００１２】なお、車体Ｂ後方からの光線を偶数回反射
させると反射像の左右が車体等の左右と反転し、後方視
野の左右を誤認させるおそれがある。If the light rays from the rear of the vehicle body B are reflected an even number of times, the left and right of the reflected image may be reversed from the left and right of the vehicle body and the like, and the left and right of the rear visual field may be mistakenly recognized.
【００１３】また、車体等後方からの光線を、外部及び
内部プリズムによって全反射させている。周知のよう
に、全反射は鏡面等の反射に比べて反射率が極めて高い
ので、鮮明な後方情景の像を結ぶことができる。Light rays from the rear of the vehicle body are totally reflected by external and internal prisms. As is well known, since the total reflection has a much higher reflectance than the reflection of a mirror surface or the like, a clear image of the rear scene can be formed.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明に係る後方視認装置の自動車内における
配設状態を示す説明図。FIG. 1 is an explanatory view showing a disposition state of a rear visual recognition device according to the present invention in an automobile.
【図２】同後方視認装置の構成を示す説明図。FIG. 2 is an explanatory diagram showing a configuration of the rear visual recognition device.
１ 外部プリズム ３ 内部プリズム 11 平面部 12 平面部 13 斜面部 31 平面部 32 平面部 33 斜面部 34 斜面部 1 Outer prism 3 Inner prism 11 Plane 12 Plane 13 Slope 31 Plane 32 Plane 33 Slope 34 Slope
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12940791AJPH05330383A (en) | 1991-05-31 | 1991-05-31 | Rearviewer |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12940791AJPH05330383A (en) | 1991-05-31 | 1991-05-31 | Rearviewer |
| Publication Number | Publication Date |
|---|---|
| JPH05330383Atrue JPH05330383A (en) | 1993-12-14 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12940791APendingJPH05330383A (en) | 1991-05-31 | 1991-05-31 | Rearviewer |
| Country | Link |
|---|---|
| JP (1) | JPH05330383A (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2723347A1 (en)* | 1994-08-05 | 1996-02-09 | Ung Ly Weng | MIRROR FOR MOTOR VEHICLE WITH NON-DEFORMING MIRROR FOR DEAD ANGLE |
| US5617245A (en)* | 1991-04-10 | 1997-04-01 | Milner; Peter J. | Rear view mirror unit |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5617245A (en)* | 1991-04-10 | 1997-04-01 | Milner; Peter J. | Rear view mirror unit |
| FR2723347A1 (en)* | 1994-08-05 | 1996-02-09 | Ung Ly Weng | MIRROR FOR MOTOR VEHICLE WITH NON-DEFORMING MIRROR FOR DEAD ANGLE |
| WO1996004152A1 (en)* | 1994-08-05 | 1996-02-15 | Ly Weng Ung | Non-distorting blind spot mirror |
| GB2302071A (en)* | 1994-08-05 | 1997-01-08 | Ly Weng Ung | Non-distorting blind spot mirror |
| GB2302071B (en)* | 1994-08-05 | 1997-12-17 | Ly Weng Ung | Non-distorting blind spot mirror |
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