GB2286499B - Automatic focusing apparatus - Google Patents

Automatic focusing apparatus

Info

Publication number
GB2286499B
GB2286499B GB9505187A GB9505187A GB2286499B GB 2286499 B GB2286499 B GB 2286499B GB 9505187 A GB9505187 A GB 9505187A GB 9505187 A GB9505187 A GB 9505187A GB 2286499 B GB2286499 B GB 2286499B
Authority
GB
United Kingdom
Prior art keywords
automatic focusing
focusing apparatus
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
GB9505187A
Other versions
GB2286499A (en
GB9505187D0 (en
Inventor
Masahiro Nakata
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 JP20660591A external-priority patent/JP3140500B2/en
Priority claimed from JP20660891A external-priority patent/JP3140501B2/en
Priority claimed from JP20660991A external-priority patent/JP3193404B2/en
Priority claimed from JP20660691A external-priority patent/JP3222497B2/en
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Priority claimed from GB9210487A external-priority patent/GB2255870B/en
Publication of GB9505187D0 publication Critical patent/GB9505187D0/en
Publication of GB2286499A publication Critical patent/GB2286499A/en
Application granted granted Critical
Publication of GB2286499B publication Critical patent/GB2286499B/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)
GB9505187A 1991-05-15 1992-05-15 Automatic focusing apparatus Expired - Fee Related GB2286499B (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP20660591A JP3140500B2 (en) 1991-05-15 1991-05-15 Focus detection device
JP20660891A JP3140501B2 (en) 1991-05-15 1991-05-15 Automatic focusing device
JP20660991A JP3193404B2 (en) 1991-05-15 1991-05-15 Camera auto focus device
JP20660691A JP3222497B2 (en) 1991-05-15 1991-05-15 Autofocus device
JP20660791 1991-05-15
GB9210487A GB2255870B (en) 1991-05-15 1992-05-15 Automatic focusing apparatus

Publications (3)

Publication Number Publication Date
GB9505187D0 GB9505187D0 (en) 1995-05-03
GB2286499A GB2286499A (en) 1995-08-16
GB2286499B true GB2286499B (en) 1995-11-01

Family

ID=27547163

Family Applications (3)

Application Number Title Priority Date Filing Date
GB9505186A Expired - Fee Related GB2286498B (en) 1991-05-15 1992-05-15 Automatic focusing apparatus
GB9505187A Expired - Fee Related GB2286499B (en) 1991-05-15 1992-05-15 Automatic focusing apparatus
GB9505185A Expired - Fee Related GB2286497B (en) 1991-05-15 1992-05-15 Automatic focusing apparatus

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB9505186A Expired - Fee Related GB2286498B (en) 1991-05-15 1992-05-15 Automatic focusing apparatus

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB9505185A Expired - Fee Related GB2286497B (en) 1991-05-15 1992-05-15 Automatic focusing apparatus

Country Status (1)

Country Link
GB (3) GB2286498B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0349736A2 (en) * 1988-05-13 1990-01-10 Minolta Co., Ltd. Automatic focusing apparatus of a camera
US5005039A (en) * 1988-05-17 1991-04-02 Minolta Camera Kabushiki Kaisha Autofocusing camera
US5012267A (en) * 1987-10-21 1991-04-30 Canon Kabushiki Kaisha Focus adjusting apparatus
GB2250828A (en) * 1990-11-29 1992-06-17 Asahi Optical Co Ltd Automatic focusing device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4537487A (en) * 1983-09-01 1985-08-27 Minolta Camera Kabushiki Kaisha Automatic focus control system with backlash correcting arrangement
US4783677A (en) * 1986-06-21 1988-11-08 Minolta Camera Kabushiki Kaisha Automatic focus control device
JPS6318312A (en) * 1986-07-10 1988-01-26 Canon Inc Focus detector
JPH0616132B2 (en) * 1987-01-12 1994-03-02 キヤノン株式会社 Optical device with drive
JP2956703B2 (en) * 1988-05-06 1999-10-04 ミノルタ株式会社 Lens drive
EP0347042B1 (en) * 1988-05-13 1995-01-25 Nikon Corporation Automatic focusing apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5012267A (en) * 1987-10-21 1991-04-30 Canon Kabushiki Kaisha Focus adjusting apparatus
EP0349736A2 (en) * 1988-05-13 1990-01-10 Minolta Co., Ltd. Automatic focusing apparatus of a camera
US5005039A (en) * 1988-05-17 1991-04-02 Minolta Camera Kabushiki Kaisha Autofocusing camera
GB2250828A (en) * 1990-11-29 1992-06-17 Asahi Optical Co Ltd Automatic focusing device

Also Published As

Publication number Publication date
GB2286498B (en) 1995-11-01
GB2286498A (en) 1995-08-16
GB2286497A (en) 1995-08-16
GB9505185D0 (en) 1995-05-03
GB2286499A (en) 1995-08-16
GB9505186D0 (en) 1995-05-03
GB9505187D0 (en) 1995-05-03
GB2286497B (en) 1995-11-01

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)

Effective date: 20060508

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20070515