GB2224126B - Automatic focusing device - Google Patents

Automatic focusing device

Info

Publication number
GB2224126B
GB2224126B GB8923297A GB8923297A GB2224126B GB 2224126 B GB2224126 B GB 2224126B GB 8923297 A GB8923297 A GB 8923297A GB 8923297 A GB8923297 A GB 8923297A GB 2224126 B GB2224126 B GB 2224126B
Authority
GB
United Kingdom
Prior art keywords
automatic focusing
focusing device
automatic
focusing
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.)
Expired - Fee Related
Application number
GB8923297A
Other versions
GB8923297D0 (en
GB2224126A (en
Inventor
Tadayuki Kirigaya
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/en
Priority claimed from JP27281688A external-priority patent/JPH02118610A/en
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Publication of GB8923297D0 publication Critical patent/GB8923297D0/en
Publication of GB2224126A publication Critical patent/GB2224126A/en
Application granted granted Critical
Publication of GB2224126B publication Critical patent/GB2224126B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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)
GB8923297A 1988-10-18 1989-10-16 Automatic focusing device Expired - Fee Related GB2224126B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1988135835U JPH0714969Y2 (en) 1988-10-18 1988-10-18 Camera autofocus device
JP27281688A JPH02118610A (en) 1988-10-28 1988-10-28 Focus limiter for automatic focusing camera

Publications (3)

Publication Number Publication Date
GB8923297D0 GB8923297D0 (en) 1989-12-06
GB2224126A GB2224126A (en) 1990-04-25
GB2224126B true GB2224126B (en) 1993-03-31

Family

ID=26469589

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8923297A Expired - Fee Related GB2224126B (en) 1988-10-18 1989-10-16 Automatic focusing device

Country Status (3)

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

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3103587B2 (en) * 1990-04-25 2000-10-30 オリンパス光学工業株式会社 Automatic focusing device
USRE36546E (en) * 1990-11-29 2000-02-01 Asahi Kogaku Kogyo Kabushiki Kaisha Automatic focusing device
GB2250829B (en) * 1990-11-29 1994-08-17 Asahi Optical Co Ltd Automatic focusing device
US5291235A (en) * 1990-11-29 1994-03-01 Asahi Kogaku Kogyo Kabushiki Kaisha Automatic focusing device
DE4216073C2 (en) * 1991-05-15 1995-01-26 Asahi Optical Co Ltd Device for automatically focusing an optical system
US8134597B2 (en) 2008-12-05 2012-03-13 Sony Ericsson Mobile Communications Ab Camera system with touch focus and method

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4389106A (en) * 1980-08-06 1983-06-21 Chinon Kabushiki Kaisha Focusing control device
US4557577A (en) * 1982-12-25 1985-12-10 Canon Kabushiki Kaisha Auto focus apparatus for a camera
US4588278A (en) * 1982-01-30 1986-05-13 Ricoh Company, Ltd. Lens driving device of an auto-focus system
US4641942A (en) * 1980-10-16 1987-02-10 Canon Kabushiki Kaisha Focus detecting system
US4671640A (en) * 1984-08-09 1987-06-09 Minolta Camera Kabushiki Kaisha Automatic focus control camera
US4750013A (en) * 1986-08-15 1988-06-07 Nippon Kogaku K. K. Automatic focus adjustment camera
US4764787A (en) * 1986-01-21 1988-08-16 Minolta Camera Kabushiki Kaisha Automatic focus adjusting device
US4768054A (en) * 1986-02-14 1988-08-30 Minolta Camera Kabushiki Kaisha Focus condition detecting device
US4812636A (en) * 1985-05-23 1989-03-14 Nikon Corporation Automatic focal point control apparatus with correction of sequential defocus signals dependent on object contrast
EP0347042A1 (en) * 1988-05-13 1989-12-20 Nikon Corporation Automatic focusing apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5964816A (en) * 1982-10-05 1984-04-12 Olympus Optical Co Ltd Lens barrel
JPS6053913A (en) * 1983-09-05 1985-03-28 Canon Inc Automatic focusing device
DE3437145C2 (en) * 1984-10-10 1996-03-28 Ricoh Kk Automatic focusing device for photographic cameras
JPH0820582B2 (en) * 1986-07-16 1996-03-04 株式会社ニコン camera

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4389106A (en) * 1980-08-06 1983-06-21 Chinon Kabushiki Kaisha Focusing control device
US4641942A (en) * 1980-10-16 1987-02-10 Canon Kabushiki Kaisha Focus detecting system
US4588278A (en) * 1982-01-30 1986-05-13 Ricoh Company, Ltd. Lens driving device of an auto-focus system
US4557577A (en) * 1982-12-25 1985-12-10 Canon Kabushiki Kaisha Auto focus apparatus for a camera
US4671640A (en) * 1984-08-09 1987-06-09 Minolta Camera Kabushiki Kaisha Automatic focus control camera
US4812636A (en) * 1985-05-23 1989-03-14 Nikon Corporation Automatic focal point control apparatus with correction of sequential defocus signals dependent on object contrast
US4764787A (en) * 1986-01-21 1988-08-16 Minolta Camera Kabushiki Kaisha Automatic focus adjusting device
US4768054A (en) * 1986-02-14 1988-08-30 Minolta Camera Kabushiki Kaisha Focus condition detecting device
US4750013A (en) * 1986-08-15 1988-06-07 Nippon Kogaku K. K. Automatic focus adjustment camera
EP0347042A1 (en) * 1988-05-13 1989-12-20 Nikon Corporation Automatic focusing apparatus

Also Published As

Publication number Publication date
DE3934767C2 (en) 1996-05-30
GB8923297D0 (en) 1989-12-06
DE3934767A1 (en) 1990-04-19
FR2637990A1 (en) 1990-04-20
GB2224126A (en) 1990-04-25

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20071016