JPS5746233A - Automatic focus detector of camera - Google Patents

Automatic focus detector of camera

Info

Publication number
JPS5746233A
JPS5746233A JP12176180A JP12176180A JPS5746233A JP S5746233 A JPS5746233 A JP S5746233A JP 12176180 A JP12176180 A JP 12176180A JP 12176180 A JP12176180 A JP 12176180A JP S5746233 A JPS5746233 A JP S5746233A
Authority
JP
Japan
Prior art keywords
circuit
mirror
focusing
behind
light intensity
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
JP12176180A
Other languages
Japanese (ja)
Inventor
Harumi Aoki
Masahiro Kawasaki
Koji Suzuki
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.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo 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 Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Priority to JP12176180A priority Critical patent/JPS5746233A/en
Priority to DE3131053A priority patent/DE3131053C2/en
Priority to US06/290,415 priority patent/US4410258A/en
Priority to GB8124181A priority patent/GB2082010B/en
Publication of JPS5746233A publication Critical patent/JPS5746233A/en
Priority to GB08412315A priority patent/GB2141892B/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/10—Power-operated focusing
    • 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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2217/00—Details of cameras or camera bodies; Accessories therefor
    • G03B2217/005—Blur detection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To compensate a difference of transmission factors of an optical separator, by increasing or decreasing one element output, in a focusing detector by which separated luminous fluxes are made incident to photoelectric elements placed before and behind the film transmission surface. CONSTITUTION:A luminous flux E which has been led by a submirror is separted into 2 luminous fluxes by an optical separator 16, and is made incident to a phtoelectric element string SA (rear) and SR (front) placed before and behind by an equal distance from the film transmission surface. In this case, an output difference between the transmission light intensity gammaaE of a half mirror 16a, and the light intensity gammabE reflected by said mirror and a mirror 16b is compensated by a compensating circuit. That is to say, 2 element outputs 75, 76 put their characteristics in order by amplifying or attenuating one of them by the compensating circuit, attain to a focusing state deciding circuit 82 through a focus detecting circuit 78, a direction detecting circuit, a detection not available deciding circuit 80, and a focus effective area deciding circuit 81, and each signal of a front pin 83, a rear pin 85 and focusing 84 is outputted.
JP12176180A 1980-08-07 1980-09-04 Automatic focus detector of camera Pending JPS5746233A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP12176180A JPS5746233A (en) 1980-09-04 1980-09-04 Automatic focus detector of camera
DE3131053A DE3131053C2 (en) 1980-08-07 1981-08-05 Automatic focusing detection device for a camera
US06/290,415 US4410258A (en) 1980-08-07 1981-08-06 Automatic focus detecting device for camera
GB8124181A GB2082010B (en) 1980-08-07 1981-08-07 Automatic focus detecting devices for cameras
GB08412315A GB2141892B (en) 1980-08-07 1984-05-14 Automatic focus detecting devices for cameras

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12176180A JPS5746233A (en) 1980-09-04 1980-09-04 Automatic focus detector of camera

Publications (1)

Publication Number Publication Date
JPS5746233A true JPS5746233A (en) 1982-03-16

Family

ID=14819224

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12176180A Pending JPS5746233A (en) 1980-08-07 1980-09-04 Automatic focus detector of camera

Country Status (1)

Country Link
JP (1) JPS5746233A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59155809A (en) * 1983-02-24 1984-09-05 Olympus Optical Co Ltd Automatic focus detecting device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4958826A (en) * 1972-10-04 1974-06-07
JPS5518652A (en) * 1978-07-28 1980-02-08 Canon Inc Imaging state detecting system of image

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4958826A (en) * 1972-10-04 1974-06-07
JPS5518652A (en) * 1978-07-28 1980-02-08 Canon Inc Imaging state detecting system of image

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59155809A (en) * 1983-02-24 1984-09-05 Olympus Optical Co Ltd Automatic focus detecting device
JPH0541965B2 (en) * 1983-02-24 1993-06-25 Olympus Optical Co

Similar Documents

Publication Publication Date Title
JPS5576312A (en) Focus detecting system of image
JPS5764217A (en) Automatic focusing camera
JPS5799604A (en) Focus detector
JPS57108810A (en) Focus detector
JPS5723911A (en) Optical splitter
US4876565A (en) Apparatus and method of underwater optical recording
US4307947A (en) Focus detecting device for camera
JPS5746233A (en) Automatic focus detector of camera
JPS5767904A (en) Deciding system for adjusting state of focus
US4716284A (en) Photographic optical system having enhanced spectral transmittance characteristics
JPS5687818A (en) Reflex type position detector
JPS5347851A (en) Coupling element for optical branching
JPS57130006A (en) Focus detector
SU1377811A1 (en) Device for automatic focusing of a reflex camera
JPS5766535A (en) Focus detector
JPS5669606A (en) Focus detector
JPS5793328A (en) Photometric distribution switching device of camera
JPS57148710A (en) Focus detector
JPS56106226A (en) Focusing detector of single lens reflex camera
JPS5727227A (en) Optical separator
JPS5564219A (en) Focus detecting optical device for camera
RU1807582C (en) Tv camera
JPS57158816A (en) Focusing detector
JPS55110228A (en) Focus detector of camera
JPS5720079A (en) Solid color image pickup device