JPS5998421U

JPS5998421U - optical device

Info

Publication number: JPS5998421U
Application number: JP19223282U
Authority: JP
Inventors: 孝之坪井
Original assignee: キヤノン株式会社
Priority date: 1982-12-21
Filing date: 1982-12-21
Publication date: 1984-07-03
Also published as: JPH0121284Y2

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

[Brief explanation of drawings]

図は本考案の一実施例を示すもので、第１図はカメラの
レンズ鏡筒部と関連機構の要部分解斜視図、第２図はそ
の要部の光軸上断面図、第３図および第４図はカム筒と
前群レンズとの関係を説明する展開図で、第３図は近距
離位置、第４図は遠距離位置、をそれぞれ示し、第５図
は本実施例に用いたレンズ系の像面湾曲の収差図を、通
常撮影モードとブリフォーカス撮影モードとについて、
近距離、遠距離別に示し、第６図は本実施例のカ　　　
　　□メラが撮影効果のあるファインダ視野図の一例を
示す。１．２，３．４・・・レンズ、７，８・・・レンズ筒、
・７ｂ・・・カム穴、９・・ｈカム１．９ｃ・・・カム
穴、１０゜１１・・・カムピン、１２・・・キーレバー
、１３・・・ブリフォーカスレバー、１４・・・投光素
子走査カム板、１５・・・ストップレバー、１７・・・
電磁石、１８・・・投光素子レバー、２０・・・投光素
子、３０・・・カメラ本／体の構造部材。The figures show one embodiment of the present invention, in which Fig. 1 is an exploded perspective view of the main parts of the camera lens barrel and related mechanisms, Fig. 2 is a sectional view of the main parts on the optical axis, and Fig. 3 and Fig. 4 are developed views for explaining the relationship between the cam barrel and the front group lens, Fig. 3 shows the close-range position, Fig. 4 shows the far-distance position, and Fig. 5 is used for this example. The aberration diagrams of the field curvature of the lens system used in the normal shooting mode and the pre-focus shooting mode are shown below.
The figures are shown separately for short distance and long distance.
□ Shows an example of a viewfinder field diagram with a camera effect. 1.2, 3.4... Lens, 7, 8... Lens tube,
・7b...Cam hole, 9...h cam 1.9c...cam hole, 10°11...cam pin, 12...key lever, 13...brifocus lever, 14...light emission Element scanning cam plate, 15...stop lever, 17...
Electromagnet, 18... Light projecting element lever, 20... Light projecting element, 30... Camera book/body structural member.

Claims

[Scope of utility model registration request]

In a camera with a built-in automatic focus adjustment device that allows the position of the subject to be focused to be laid out at locations other than the center of the screen, e.g. A variable field curvature device characterized by displacing a part of a photographic lens system in order to smooth the focal position of the periphery.