JPS5767904A - Deciding system for adjusting state of focus - Google Patents

Deciding system for adjusting state of focus

Info

Publication number
JPS5767904A
JPS5767904A JP55144782A JP14478280A JPS5767904A JP S5767904 A JPS5767904 A JP S5767904A JP 55144782 A JP55144782 A JP 55144782A JP 14478280 A JP14478280 A JP 14478280A JP S5767904 A JPS5767904 A JP S5767904A
Authority
JP
Japan
Prior art keywords
focus
decision
focus state
decided
plus
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
JP55144782A
Other languages
English (en)
Inventor
Shinji Sakai
Nobuhiko Shinoda
Takao Kinoshita
Mitsuya Hosoe
Takashi Kawabata
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP55144782A priority Critical patent/JPS5767904A/ja
Priority to US06/310,373 priority patent/US4496832A/en
Priority to DE19813141183 priority patent/DE3141183A1/de
Publication of JPS5767904A publication Critical patent/JPS5767904A/ja
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
    • G02B7/38—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals measured at different points on the optical axis, e.g. focussing on two or more planes and comparing image data
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Optics & Photonics (AREA)
  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)
JP55144782A 1980-10-16 1980-10-16 Deciding system for adjusting state of focus Pending JPS5767904A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP55144782A JPS5767904A (en) 1980-10-16 1980-10-16 Deciding system for adjusting state of focus
US06/310,373 US4496832A (en) 1980-10-16 1981-10-09 Focusing state discriminating system
DE19813141183 DE3141183A1 (de) 1980-10-16 1981-10-16 Unterscheidungssystem fuer den scharfeinstellzustand

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55144782A JPS5767904A (en) 1980-10-16 1980-10-16 Deciding system for adjusting state of focus

Publications (1)

Publication Number Publication Date
JPS5767904A true JPS5767904A (en) 1982-04-24

Family

ID=15370305

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55144782A Pending JPS5767904A (en) 1980-10-16 1980-10-16 Deciding system for adjusting state of focus

Country Status (3)

Country Link
US (1) US4496832A (ja)
JP (1) JPS5767904A (ja)
DE (1) DE3141183A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61198456A (ja) * 1985-02-28 1986-09-02 Canon Inc 光ピツクアツプ

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4538062A (en) * 1981-11-19 1985-08-27 Olympus Optical Co., Ltd. Focusing detecting device with coaxial source and detector
US4604562A (en) * 1982-09-29 1986-08-05 Eaton-Optimetrix Inc. Feedback-controlled workpiece positioning system
JPS59129813A (ja) * 1983-01-17 1984-07-26 Canon Inc 焦点調節装置
JPH05142462A (ja) * 1991-11-18 1993-06-11 Olympus Optical Co Ltd 合焦装置
JP3548213B2 (ja) * 1993-12-22 2004-07-28 キヤノン株式会社 多点測距装置およびカメラ
US5703351A (en) * 1996-11-18 1997-12-30 Eastman Kodak Company Autofocus module having a diffractively achromatized toroidal lens
JP2003270517A (ja) * 2002-03-13 2003-09-25 Fuji Photo Optical Co Ltd ピント状態検出装置
JP2004085675A (ja) * 2002-08-23 2004-03-18 Fuji Photo Optical Co Ltd オートフォーカスシステム
US9921399B2 (en) * 2015-03-31 2018-03-20 General Electric Company System and method for continuous, asynchronous autofocus of optical instruments

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5245353A (en) * 1975-10-08 1977-04-09 Hitachi Ltd Automatically focusing device
JPS54161325A (en) * 1978-06-10 1979-12-20 Ricoh Co Ltd Focus detector
JPS5576312A (en) * 1978-12-04 1980-06-09 Canon Inc Focus detecting system of image

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1547457A1 (de) * 1966-01-22 1970-02-19 Schneider Co Optische Werke Verfahren und Vorrichtung zur automatischen Scharfeinstellung optischer Systeme
JPS6052404B2 (ja) * 1975-06-13 1985-11-19 株式会社日立製作所 自動焦点調節装置
JPS5379425A (en) * 1976-12-24 1978-07-13 Yasushi Kawabe Focus discriminator
JPS55106421A (en) * 1979-02-09 1980-08-15 Ricoh Co Ltd Focusing detector
JPS55155308A (en) * 1979-05-23 1980-12-03 Canon Inc Focusing position detecting system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5245353A (en) * 1975-10-08 1977-04-09 Hitachi Ltd Automatically focusing device
JPS54161325A (en) * 1978-06-10 1979-12-20 Ricoh Co Ltd Focus detector
JPS5576312A (en) * 1978-12-04 1980-06-09 Canon Inc Focus detecting system of image

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61198456A (ja) * 1985-02-28 1986-09-02 Canon Inc 光ピツクアツプ

Also Published As

Publication number Publication date
US4496832A (en) 1985-01-29
DE3141183A1 (de) 1982-05-19

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