JPS56106226A - Focusing detector of single lens reflex camera - Google Patents

Focusing detector of single lens reflex camera

Info

Publication number
JPS56106226A
JPS56106226A JP921380A JP921380A JPS56106226A JP S56106226 A JPS56106226 A JP S56106226A JP 921380 A JP921380 A JP 921380A JP 921380 A JP921380 A JP 921380A JP S56106226 A JPS56106226 A JP S56106226A
Authority
JP
Japan
Prior art keywords
focusing
optical system
mirror
moving mirror
constitution
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
JP921380A
Other languages
Japanese (ja)
Inventor
Kunio Kawamura
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.)
Minolta Co Ltd
Original Assignee
Minolta 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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP921380A priority Critical patent/JPS56106226A/en
Publication of JPS56106226A publication Critical patent/JPS56106226A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/36—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)

Abstract

PURPOSE:To obtain an optical system of irreducible necessary consitution, by performing focusing detection by extending as a focusing detecting block a part, which should be at a focus position, to a position optically equivalent to a film surface at the lower part or side part behind a moving mirror. CONSTITUTION:The optical system, reflecting a luminous flux from an object passed through photographic lens 2 to a finder system by moving mirror 6, enables the focusing state to be observed facing to the object via focusing plate 10 and also displays the exposure by the output of the photometric element 14. In this state, part of the luminous flux of the object from photographic lens 2 passes through light transmission part 6a of moving mirror 6 and is led to focusing detecting block 15, extending to a position optically equivalent to the film 5 surface under mirror 6, by auxiliary mirror 8 provided behind the part 6a. Consequently, the optical system has irreducible necessary constitution and its light loss can be minimized.
JP921380A 1980-01-28 1980-01-28 Focusing detector of single lens reflex camera Pending JPS56106226A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP921380A JPS56106226A (en) 1980-01-28 1980-01-28 Focusing detector of single lens reflex camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP921380A JPS56106226A (en) 1980-01-28 1980-01-28 Focusing detector of single lens reflex camera

Publications (1)

Publication Number Publication Date
JPS56106226A true JPS56106226A (en) 1981-08-24

Family

ID=11714174

Family Applications (1)

Application Number Title Priority Date Filing Date
JP921380A Pending JPS56106226A (en) 1980-01-28 1980-01-28 Focusing detector of single lens reflex camera

Country Status (1)

Country Link
JP (1) JPS56106226A (en)

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