JPS5559411A - Focus point detector - Google Patents

Focus point detector

Info

Publication number
JPS5559411A
JPS5559411A JP13355878A JP13355878A JPS5559411A JP S5559411 A JPS5559411 A JP S5559411A JP 13355878 A JP13355878 A JP 13355878A JP 13355878 A JP13355878 A JP 13355878A JP S5559411 A JPS5559411 A JP S5559411A
Authority
JP
Japan
Prior art keywords
optical system
focus position
differential signals
supplied
polarity
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
JP13355878A
Other languages
English (en)
Inventor
Yoshio Nakajima
Shuichi Takayama
Kosaku Tsuboshima
Teruo Iwazawa
Masabumi Yamazaki
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 JP13355878A priority Critical patent/JPS5559411A/ja
Priority to US06/086,674 priority patent/US4331864A/en
Priority to DE19792943793 priority patent/DE2943793A1/de
Publication of JPS5559411A publication Critical patent/JPS5559411A/ja
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C3/00—Measuring distances in line of sight; Optical rangefinders
    • G01C3/32—Measuring distances in line of sight; Optical rangefinders by focusing the object, e.g. on a ground glass screen
    • 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)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Optics & Photonics (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)
JP13355878A 1978-10-30 1978-10-30 Focus point detector Pending JPS5559411A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP13355878A JPS5559411A (en) 1978-10-30 1978-10-30 Focus point detector
US06/086,674 US4331864A (en) 1978-10-30 1979-10-19 Apparatus for detecting an in-focused condition of optical systems
DE19792943793 DE2943793A1 (de) 1978-10-30 1979-10-30 Vorrichtung zur feststellung der schaerfeeinstellung eines optischen systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13355878A JPS5559411A (en) 1978-10-30 1978-10-30 Focus point detector

Publications (1)

Publication Number Publication Date
JPS5559411A true JPS5559411A (en) 1980-05-02

Family

ID=15107607

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13355878A Pending JPS5559411A (en) 1978-10-30 1978-10-30 Focus point detector

Country Status (3)

Country Link
US (1) US4331864A (ja)
JP (1) JPS5559411A (ja)
DE (1) DE2943793A1 (ja)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4358674A (en) * 1980-12-04 1982-11-09 Honeywell, Inc. Steered low cost auto focus system
EP0054349A3 (en) * 1980-12-10 1983-03-16 EMI Limited Automatically focussed optical system
US4432622A (en) * 1981-06-16 1984-02-21 Ricoh Company, Ltd. Focusing-position-detection circuit
JPS5852607A (ja) * 1981-09-24 1983-03-28 Nippon Kogaku Kk <Nikon> 自動焦点調節装置
JP2761391B2 (ja) * 1988-10-04 1998-06-04 オリンパス光学工業株式会社 焦点検出装置
JP4181724B2 (ja) * 2000-03-03 2008-11-19 日本電気株式会社 証明付再暗号シャッフル方法と装置、再暗号シャッフル検証方法と装置、入力文列生成方法と装置及び記録媒体
DE10018312C2 (de) * 2000-04-13 2003-10-09 Stn Atlas Elektronik Gmbh Verfahren und Vorrichtung zum Fokussieren eines Bildes
WO2020095366A1 (ja) * 2018-11-06 2020-05-14 オリンパス株式会社 撮像装置、内視鏡装置及び撮像装置の作動方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3875401B1 (en) * 1973-07-09 1994-02-01 Honeywell Inc. Focus detecting apparatus
JPS53116852A (en) * 1977-03-23 1978-10-12 Olympus Optical Co Ltd Automatic focus adjusting system
US4185191A (en) * 1978-06-05 1980-01-22 Honeywell Inc. Range determination system

Also Published As

Publication number Publication date
DE2943793A1 (de) 1980-05-08
US4331864A (en) 1982-05-25

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