JPS59114526U - Focus point detection device for single-lens reflex camera - Google Patents

Focus point detection device for single-lens reflex camera

Info

Publication number
JPS59114526U
JPS59114526U JP684083U JP684083U JPS59114526U JP S59114526 U JPS59114526 U JP S59114526U JP 684083 U JP684083 U JP 684083U JP 684083 U JP684083 U JP 684083U JP S59114526 U JPS59114526 U JP S59114526U
Authority
JP
Japan
Prior art keywords
lens
reflective surface
light beam
detection device
camera
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP684083U
Other languages
Japanese (ja)
Inventor
望 北岸
Original Assignee
キヤノン株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by キヤノン株式会社 filed Critical キヤノン株式会社
Priority to JP684083U priority Critical patent/JPS59114526U/en
Publication of JPS59114526U publication Critical patent/JPS59114526U/en
Pending legal-status Critical Current

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Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は二次結像光学系を用いる合焦点距離検出装置の
概念的な光路説明図、第2図、第3図は夫々第1図の光
路を組み込んだ一眼レフレタスカメラの従来例の概要図
、第4図、第5図は本考案の異る実施例の概要図、第6
図は第5図の一部の斜視図である。 1・・・対物レンズ、3・・・二次結像レンズ、4・・
・光電素子アレー、5・・・フィールドレンズ、6川主
ミラー、7・・・サブミラー、8・・・反射鏡、9・・
・凹面鏡、10・・・光学部材、11・・・アーム、1
2・・・長筒。 ′17(″ 3
Fig. 1 is a conceptual optical path explanatory diagram of a focusing distance detection device using a secondary imaging optical system, and Figs. 2 and 3 are illustrations of conventional examples of single-lens reflex lettuce cameras incorporating the optical path shown in Fig. 1, respectively. Schematic diagrams, Figures 4 and 5 are schematic diagrams of different embodiments of the present invention, Figure 6
The figure is a perspective view of a part of FIG. 5. 1... Objective lens, 3... Secondary imaging lens, 4...
・Photoelectric element array, 5...Field lens, 6 Main mirror, 7...Sub mirror, 8...Reflector, 9...
・Concave mirror, 10... Optical member, 11... Arm, 1
2...Long tube. '17(''3

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 撮影レンズたる対物レンズを通過した光束をカメラの主
ミラーの後方において下方に曲げる反射面と、該反射面
で曲げられた光束を受けて前記対物レンズにより形成さ
れた像を再結像させる二次結像レンズと、該二次結像レ
ンズによる再結像面jこ配置された光電気変換素子と、
眩光・電気変換素子に至る光束のケラレを防ぐために上
記反射面と二次結像レンズの間の光軸上に設けられたフ
ィールドレンズとして機能する屈折部材とを具えた一眼
レフレタスカメラの合焦点検出装置において、前記反射
面はフィルム面の直前に位置し、前記フィールドレンズ
として機能する屈折部材はその屈折面が該反射面の直近
に位置し且つその先軸が前記光軸と一致するように配置
されており、これら反射面及び屈折部材は相互に固定さ
れており、撮影時には該反射面及び屈折部材を共に撮影
光束外へ退避させる機構が設けられていることを特徴と
する一眼レフレタスカメラの合焦点検出装置。
A reflective surface that bends the light beam that has passed through the objective lens, which is the photographic lens, downward behind the main mirror of the camera, and a secondary surface that receives the light beam bent by the reflective surface and re-forms the image formed by the objective lens. an imaging lens; a photoelectric conversion element disposed on a reimaging surface by the secondary imaging lens;
A focusing point of a single-lens reflex lettuce camera comprising a refractive member functioning as a field lens provided on the optical axis between the reflecting surface and the secondary imaging lens in order to prevent vignetting of the light beam reaching the dazzling and electrical conversion element. In the detection device, the reflective surface is located immediately in front of the film surface, and the refractive member functioning as the field lens is configured such that its refractive surface is located in the immediate vicinity of the reflective surface and its front axis coincides with the optical axis. A single-lens reflex lettuce camera characterized in that the reflective surface and the refracting member are fixed to each other, and a mechanism is provided for retracting both the reflective surface and the refractive member out of the photographing light beam during photographing. Focus point detection device.
JP684083U 1983-01-21 1983-01-21 Focus point detection device for single-lens reflex camera Pending JPS59114526U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP684083U JPS59114526U (en) 1983-01-21 1983-01-21 Focus point detection device for single-lens reflex camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP684083U JPS59114526U (en) 1983-01-21 1983-01-21 Focus point detection device for single-lens reflex camera

Publications (1)

Publication Number Publication Date
JPS59114526U true JPS59114526U (en) 1984-08-02

Family

ID=30138380

Family Applications (1)

Application Number Title Priority Date Filing Date
JP684083U Pending JPS59114526U (en) 1983-01-21 1983-01-21 Focus point detection device for single-lens reflex camera

Country Status (1)

Country Link
JP (1) JPS59114526U (en)

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