JPS554056A - Focusing optical device for single-lens reflex camera - Google Patents

Focusing optical device for single-lens reflex camera

Info

Publication number
JPS554056A
JPS554056A JP7693878A JP7693878A JPS554056A JP S554056 A JPS554056 A JP S554056A JP 7693878 A JP7693878 A JP 7693878A JP 7693878 A JP7693878 A JP 7693878A JP S554056 A JPS554056 A JP S554056A
Authority
JP
Japan
Prior art keywords
detecting element
quick return
return mirror
focus detecting
photographic
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
JP7693878A
Other languages
Japanese (ja)
Inventor
Kazuo Yamamoto
Shoji Yoshida
Yoshihiro Matsumoto
Hideko Takimoto
Akimasa Wakabayashi
Akiteru Kimura
Tetsuya Kimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olympus Corp
Original Assignee
Olympus Optical Co Ltd
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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP7693878A priority Critical patent/JPS554056A/en
Publication of JPS554056A publication Critical patent/JPS554056A/en
Pending legal-status Critical Current

Links

Landscapes

  • Camera Bodies And Camera Details Or Accessories (AREA)
  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)

Abstract

PURPOSE: To make production and construction simple and eliminate the need for increased sizes of cameras by providing a focus detecting element forming a part of the image of the subject between the photographic lens and quick return mirror and deviating the same from photographic luminous flux in cooperation to shutter release operation.
CONSTITUTION: An arm 24 is mounted to the turning axis 23 of the quick return mirror 22 positioned between a photographic lens 20 and shutter 21 on the outer side thereof by way of a spring means. A focus detecting element 25 is mounted to this arm 24 in the state before shutter release so as to position on the optical axis between the photographic lens 20 and quick return mirror 22. The focus detecting element 25 is constituted by mounting an auxiliary lens 27 to the front of a photo detecting element 25 and is formed on the film plane 28 by the photographic lens 20. Light is received to a part of the same image as the image of the subject. When the release button is pushed, the quick return mirror 22 turns and in cooperation to this the arm 24 and focus detecting element 25 also turn and approach to stoppers 29b, 30b respectively and stop by being respectively detained by these stoppers in the position of not vignetting the photographic luminous flux to the film plane 28.
COPYRIGHT: (C)1980,JPO&Japio
JP7693878A 1978-06-27 1978-06-27 Focusing optical device for single-lens reflex camera Pending JPS554056A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7693878A JPS554056A (en) 1978-06-27 1978-06-27 Focusing optical device for single-lens reflex camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7693878A JPS554056A (en) 1978-06-27 1978-06-27 Focusing optical device for single-lens reflex camera

Publications (1)

Publication Number Publication Date
JPS554056A true JPS554056A (en) 1980-01-12

Family

ID=13619669

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7693878A Pending JPS554056A (en) 1978-06-27 1978-06-27 Focusing optical device for single-lens reflex camera

Country Status (1)

Country Link
JP (1) JPS554056A (en)

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