FR2637990A1 - - Google Patents

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Publication number
FR2637990A1
FR2637990A1 FR8913522A FR8913522A FR2637990A1 FR 2637990 A1 FR2637990 A1 FR 2637990A1 FR 8913522 A FR8913522 A FR 8913522A FR 8913522 A FR8913522 A FR 8913522A FR 2637990 A1 FR2637990 A1 FR 2637990A1
Authority
FR
France
Prior art keywords
distance
lens
limit
automatic focusing
focusing device
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
FR8913522A
Other languages
English (en)
French (fr)
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
Priority claimed from JP1988135835U external-priority patent/JPH0714969Y2/ja
Priority claimed from JP27281688A external-priority patent/JPH02118610A/ja
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Publication of FR2637990A1 publication Critical patent/FR2637990A1/fr
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)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)
FR8913522A 1988-10-18 1989-10-17 Pending FR2637990A1 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1988135835U JPH0714969Y2 (ja) 1988-10-18 1988-10-18 カメラの自動焦点装置
JP27281688A JPH02118610A (ja) 1988-10-28 1988-10-28 自動焦点カメラのフォーカスリミッター

Publications (1)

Publication Number Publication Date
FR2637990A1 true FR2637990A1 (ja) 1990-04-20

Family

ID=26469589

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8913522A Pending FR2637990A1 (ja) 1988-10-18 1989-10-17

Country Status (3)

Country Link
DE (1) DE3934767C2 (ja)
FR (1) FR2637990A1 (ja)
GB (1) GB2224126B (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3103587B2 (ja) * 1990-04-25 2000-10-30 オリンパス光学工業株式会社 自動合焦装置
US5291235A (en) * 1990-11-29 1994-03-01 Asahi Kogaku Kogyo Kabushiki Kaisha Automatic focusing device
USRE36546E (en) * 1990-11-29 2000-02-01 Asahi Kogaku Kogyo Kabushiki Kaisha Automatic focusing device
DE4139400C2 (de) * 1990-11-29 1996-08-29 Asahi Optical Co Ltd Automatische Fokussierungseinrichtung
FR2676552B1 (fr) * 1991-05-15 1996-01-12 Asahi Optical Co Ltd Dispositif de mise au point automatique.
US8134597B2 (en) * 2008-12-05 2012-03-13 Sony Ericsson Mobile Communications Ab Camera system with touch focus and method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4557577A (en) * 1982-12-25 1985-12-10 Canon Kabushiki Kaisha Auto focus apparatus for a camera
US4639588A (en) * 1983-09-05 1987-01-27 Canon Kabushiki Kaisha Automatic focusing device with range boundary setting
US4768054A (en) * 1986-02-14 1988-08-30 Minolta Camera Kabushiki Kaisha Focus condition detecting device

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5732409A (en) * 1980-08-06 1982-02-22 Chinon Kk Focusing controller
DE3141182A1 (de) * 1980-10-16 1982-05-19 Canon K.K., Tokyo "scharfeinstellungs-ermittlungssystem"
JPS58132205A (ja) * 1982-01-30 1983-08-06 Ricoh Co Ltd オ−トフオ−カスシステムにおけるレンズ駆動方式
JPS5964816A (ja) * 1982-10-05 1984-04-12 Olympus Optical Co Ltd レンズ鏡筒
US4671640A (en) * 1984-08-09 1987-06-09 Minolta Camera Kabushiki Kaisha Automatic focus control camera
DE3437145C2 (de) * 1984-10-10 1996-03-28 Ricoh Kk Automatische Scharfeinstellvorrichtung für photographische Kameras
JP2572372B2 (ja) * 1985-05-23 1997-01-16 株式会社ニコン 焦点検出装置
JPS62169113A (ja) * 1986-01-21 1987-07-25 Minolta Camera Co Ltd 自動焦点調節装置
JPH0820582B2 (ja) * 1986-07-16 1996-03-04 株式会社ニコン カメラ
JPS6347742A (ja) * 1986-08-15 1988-02-29 Nikon Corp 自動焦点調節カメラ
DE68920782T2 (de) * 1988-05-13 1995-08-10 Nippon Kogaku Kk Automatisches Scharfeinstellgerät.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4557577A (en) * 1982-12-25 1985-12-10 Canon Kabushiki Kaisha Auto focus apparatus for a camera
US4639588A (en) * 1983-09-05 1987-01-27 Canon Kabushiki Kaisha Automatic focusing device with range boundary setting
US4768054A (en) * 1986-02-14 1988-08-30 Minolta Camera Kabushiki Kaisha Focus condition detecting device

Also Published As

Publication number Publication date
DE3934767C2 (de) 1996-05-30
GB2224126A (en) 1990-04-25
DE3934767A1 (de) 1990-04-19
GB2224126B (en) 1993-03-31
GB8923297D0 (en) 1989-12-06

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