JPS54121122A - Focusing detector of single lens reflex camera - Google Patents

Focusing detector of single lens reflex camera

Info

Publication number
JPS54121122A
JPS54121122A JP2779278A JP2779278A JPS54121122A JP S54121122 A JPS54121122 A JP S54121122A JP 2779278 A JP2779278 A JP 2779278A JP 2779278 A JP2779278 A JP 2779278A JP S54121122 A JPS54121122 A JP S54121122A
Authority
JP
Japan
Prior art keywords
lens
focusing
optical axis
optical path
enlarging
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
JP2779278A
Other languages
Japanese (ja)
Inventor
Norio Sakagami
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 JP2779278A priority Critical patent/JPS54121122A/en
Publication of JPS54121122A publication Critical patent/JPS54121122A/en
Pending legal-status Critical Current

Links

Landscapes

  • Focusing (AREA)
  • Viewfinders (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE: To perform highly accurate focusing detection without enlarging the camera body by letting an eyepiece lens also make lens action in the direction orthogonal to the optical axis for observation.
CONSTITUTION: The image of the subject formed by a photographic lens 22, quick return mirror 25, condenser lens 26 is observed through a pentagonal prism 27 and the eyepiece lens 28 of the optical axis 01. This lens 28 is also given lens action even for the optical axis 02 in the direction orthogonal to the optical axis 01 and the imaging light is received in a photo detection part 32 by a half mirror 29 provided with a lens 26, a total reflecting mirror 30, a lens 28 and a total reflecting mirror 31, whereby the focusing is detected. Hence, the focusing detection may be performed highly accurately without enlarging the camera body by the focusing detecting optical path of the long optical path in the same vertical direction of the observation optical path.
COPYRIGHT: (C)1979,JPO&Japio
JP2779278A 1978-03-13 1978-03-13 Focusing detector of single lens reflex camera Pending JPS54121122A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2779278A JPS54121122A (en) 1978-03-13 1978-03-13 Focusing detector of single lens reflex camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2779278A JPS54121122A (en) 1978-03-13 1978-03-13 Focusing detector of single lens reflex camera

Publications (1)

Publication Number Publication Date
JPS54121122A true JPS54121122A (en) 1979-09-20

Family

ID=12230816

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2779278A Pending JPS54121122A (en) 1978-03-13 1978-03-13 Focusing detector of single lens reflex camera

Country Status (1)

Country Link
JP (1) JPS54121122A (en)

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