JPH0164608U

JPH0164608U -

Info

Publication number: JPH0164608U
Application number: JP1987159454U
Authority: JP
Priority date: 1987-10-19
Filing date: 1987-10-19
Publication date: 1989-04-25

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す概略図である
。第２図は本考案に用いられる投光プリズムの形
状を示す説明図である。第３図Ａ，Ｂは、それぞ
れ投光部、受光部の作用説明図である。第４図は
本考案を用いたカメラの正面図である。第５図は
本考案の他の実施例を示す正面図である。第６図
Ａ，Ｂは、投・受光プリズムの他の例を示す断面
図である。５……投光部、６……受光部、７……投光プリ
ズム、８……受光プリズム、１０……ストロボ、
１１……スリツト板、１５……ＰＳＤ、２０……
被写画面、２５……透明板。 FIG. 1 is a schematic diagram showing an embodiment of the present invention. FIG. 2 is an explanatory diagram showing the shape of a light projecting prism used in the present invention. 3A and 3B are explanatory views of the functions of the light projecting section and the light receiving section, respectively. FIG. 4 is a front view of a camera using the present invention. FIG. 5 is a front view showing another embodiment of the present invention. FIGS. 6A and 6B are cross-sectional views showing other examples of the projecting/receiving prism. 5...Light emitter, 6...Light receiver, 7...Light emitter prism, 8...Light receiver prism, 10...Strobe,
11...slit plate, 15...PSD, 20...
Subject screen, 25...transparent plate.

補正昭６３．２．５実用新案登録請求の範囲を次のように補正する
。Amendment February 5, 1983 The scope of claims for utility model registration is amended as follows.

【実用新案登録請求の範囲】 (1) 被写体に向けて測距用の光ビームを照射す
る投光部と、前記光ビームのうち被写体によつて
反射されてきた光を受光する受光部とを備えたオ
ートフオーカスカメラにおいて、前記投光部と受光部とをカメラボデイの正面に
一定の基線長だけ離して配置するとともに、投光
部からの光ビームを撮影画面に対して傾斜した方
向に複数に分割するために前記投光部の前面に配
置され、角度が異なる複数の光射出面を備えた光
分割プリズムと、前記受光部の前面に配置され、
前記光分割プリズムの各々の光射出面と共役関係
にある複数の光入射面を備えた分割光合成プリズ
ムとを設けたことを特徴とするカメラの測距装置
。 (2) 前記光分割プリズム及び分割光合成プリズ
ムは、フアインダ対物窓と前記投光部及び受光部
の前面を覆う透明板に一体成形されていることを
特徴とする実用新案登録請求の範囲第１項記載の
カメラの測距装置。 (3) 前記光分割プリズム及び分割光合成プリズ
ムは、フレネルプリズムであることを特徴とする
実用新案登録請求の範囲第１項もしくは第２項記
載のカメラの測距装置。 (4) 前記撮影画面に対して傾斜した方向は、撮
影画面の対角線方向に一致していることを特徴と
する実用新案登録請求の範囲第１項ないし第３項
いずれか記載のカメラの測距装置。 (5) 前記光ビームは縦長のスリツトパターンを
もつ光ビームであることを特徴とする実用新案登
録請求の範囲第４項記載のカメラの測距装置。[Scope of Claim for Utility Model Registration] (1) A light projector that emits a light beam for distance measurement toward a subject, and a light receiver that receives light reflected by the subject from among the light beams. In the autofocus camera equipped with the above-mentioned autofocus camera, the light emitting section and the light receiving section are arranged in front of the camera body with a distance of a certain base line length, and the light beam from the light emitting section is directed in a direction inclined with respect to the photographing screen. a light splitting prism disposed on the front surface of the light projecting section to split the light into a plurality of light beams, the light splitting prism having a plurality of light exit surfaces having different angles, and a light splitting prism disposed on the front surface of the light receiving section;
A distance measuring device for a camera, comprising: a split light combining prism having a plurality of light incident surfaces in a conjugate relationship with the light exit surfaces of each of the light splitting prisms. (2) Claim 1 of the Utility Model Registration Claim, characterized in that the light splitting prism and the splitting light combining prism are integrally formed with a transparent plate that covers the front surface of the front objective window and the light projecting section and the light receiving section. Distance measuring device for the camera described. (3) The distance measuring device for a camera according to claim 1 or 2, wherein the light splitting prism and the splitting light combining prism are Fresnel prisms. (4) Distance measurement of a camera according to any one of claims 1 to 3 of the utility model registration claim, wherein the direction of inclination with respect to the photographic screen corresponds to the diagonal direction of the photographic screen. Device. (5) The distance measuring device for a camera according to claim 4, wherein the light beam is a light beam having a vertically long slit pattern.

Claims

[Scope of Claim for Utility Model Registration] (1) A light projector that emits a light beam for distance measurement toward a subject, and a light receiver that receives light reflected by the subject from among the light beams. In an autofocus camera equipped with the above-mentioned autofocus camera, the light emitting section and the light receiving section are arranged horizontally or vertically in front of the camera body with a distance of a certain base line length, and the light beam from the light emitting section is oriented with respect to the base line length. a light splitting prism disposed on the front surface of the light projecting section for splitting the light into a plurality of light beams in an inclined direction, and having a plurality of light exit surfaces having different angles; 1. A distance measuring device for a camera, comprising: a split light combining prism having a plurality of light incident surfaces in a conjugate relationship with each light exit surface. (2) Claim 1 of the Utility Model Registration Claim, characterized in that the light splitting prism and the splitting light combining prism are integrally formed with a transparent plate that covers the front surface of the front objective window and the light projecting section and the light receiving section. Distance measuring device for the camera described. (3) The distance measuring device for a camera according to claim 1 or 2, wherein the light splitting prism and the splitting light combining prism are Fresnel prisms. (4) Distance measurement of a camera according to any one of claims 1 to 3 of the utility model registration claim, wherein the direction inclined with respect to the base line length corresponds to the diagonal direction of the photographing screen. Device. (5) The distance measuring device for a camera according to claim 4, wherein the light beam is a light beam having a vertically long slit pattern.