JPS5737336A - Automatic focus detector for camera - Google Patents

Automatic focus detector for camera

Info

Publication number
JPS5737336A
JPS5737336A JP11306380A JP11306380A JPS5737336A JP S5737336 A JPS5737336 A JP S5737336A JP 11306380 A JP11306380 A JP 11306380A JP 11306380 A JP11306380 A JP 11306380A JP S5737336 A JPS5737336 A JP S5737336A
Authority
JP
Japan
Prior art keywords
focus
circuit
photoelectric conversion
lens
self
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.)
Granted
Application number
JP11306380A
Other languages
Japanese (ja)
Other versions
JPS6344205B2 (en
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 JP11306380A priority Critical patent/JPS5737336A/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 JPS5737336A publication Critical patent/JPS5737336A/en
Priority to GB08412315A priority patent/GB2141892B/en
Publication of JPS6344205B2 publication Critical patent/JPS6344205B2/ja
Granted 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

Abstract

PURPOSE:To improve focus detection accuracy by providing a self-scanning type photoelectric conversion part, a contrast detecting circuit and a focus effective area decision circuit, and deciding in-focus when two ontrast signal levels go larger than an effective area limit level simultaneously. CONSTITUTION:The signals of a self-scanning type photoelectric conversion part U1 which has plural pieces of photoelectric element arrays, and a scanning circuit, and outputs the time-serial photoelectric conversion signals corresponding to the illuminance distribution of an object image and photoelectrically converted with a video circuit U2 and are extracted with a contrast detecting circuit U3. Thence, a focus indication signal is obtained by a focus decision circuit U4 and a focus display element 6 is flickered by a display driving circuit U5; at the same time, a driver U6 controlling the rate of extension of a lens system 2 is driven. Therefore, the focus detection accuracy is made higher, and the range of object luminances is widened. This device is effectively adaptable to each lens of a single lens reflex camera when its lens is interchanged.
JP11306380A 1980-08-07 1980-08-19 Automatic focus detector for camera Granted JPS5737336A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP11306380A JPS5737336A (en) 1980-08-19 1980-08-19 Automatic focus detector for 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
JP11306380A JPS5737336A (en) 1980-08-19 1980-08-19 Automatic focus detector for camera

Publications (2)

Publication Number Publication Date
JPS5737336A true JPS5737336A (en) 1982-03-01
JPS6344205B2 JPS6344205B2 (en) 1988-09-02

Family

ID=14602552

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11306380A Granted JPS5737336A (en) 1980-08-07 1980-08-19 Automatic focus detector for camera

Country Status (1)

Country Link
JP (1) JPS5737336A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6159407A (en) * 1984-08-31 1986-03-26 Canon Inc Automatic focus adjusting device
JPS6215372U (en) * 1985-07-10 1987-01-29
US7345706B2 (en) 2002-08-23 2008-03-18 Fuji Photo Optical Co., Ltd. Auto focus system
JP2014520397A (en) * 2011-06-24 2014-08-21 ボリーメディアコミュニケーションズ（シンチェン）カンパニーリミテッド Multi-depth-of-field photosensitive device, system, depth-of-field expansion method and optical imaging system
WO2016013410A1 (en) * 2014-07-22 2016-01-28 ソニー株式会社 Solid-state imaging element, and electronic device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4958826A (en) * 1972-10-04 1974-06-07
JPS5154432A (en) * 1974-11-07 1976-05-13 Asahi Optical Co Ltd Shotenkenshutsusochi
JPS5518652A (en) * 1978-07-28 1980-02-08 Canon Inc Imaging state detecting system of image

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4958826A (en) * 1972-10-04 1974-06-07
JPS5154432A (en) * 1974-11-07 1976-05-13 Asahi Optical Co Ltd Shotenkenshutsusochi
JPS5518652A (en) * 1978-07-28 1980-02-08 Canon Inc Imaging state detecting system of image

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6159407A (en) * 1984-08-31 1986-03-26 Canon Inc Automatic focus adjusting device
JPS6215372U (en) * 1985-07-10 1987-01-29
JPH0423575Y2 (en) * 1985-07-10 1992-06-02
US7345706B2 (en) 2002-08-23 2008-03-18 Fuji Photo Optical Co., Ltd. Auto focus system
JP2014520397A (en) * 2011-06-24 2014-08-21 ボリーメディアコミュニケーションズ（シンチェン）カンパニーリミテッド Multi-depth-of-field photosensitive device, system, depth-of-field expansion method and optical imaging system
WO2016013410A1 (en) * 2014-07-22 2016-01-28 ソニー株式会社 Solid-state imaging element, and electronic device
JPWO2016013410A1 (en) * 2014-07-22 2017-06-08 ソニーセミコンダクタソリューションズ株式会社 Solid-state imaging device and electronic device
US10554874B2 (en) 2014-07-22 2020-02-04 Sony Semiconductor Solutions Corporation Solid-state imaging device and electronic equipment
US11728357B2 (en) 2014-07-22 2023-08-15 Sony Semiconductor Solutions Corporation Solid-state imaging device and electronic equipment

Also Published As

Publication number Publication date
JPS6344205B2 (en) 1988-09-02

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