GB2030415B - Focus detection device - Google Patents

Focus detection device

Info

Publication number
GB2030415B
GB2030415B GB7927958A GB7927958A GB2030415B GB 2030415 B GB2030415 B GB 2030415B GB 7927958 A GB7927958 A GB 7927958A GB 7927958 A GB7927958 A GB 7927958A GB 2030415 B GB2030415 B GB 2030415B
Authority
GB
United Kingdom
Prior art keywords
detection device
focus detection
focus
detection
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
Application number
GB7927958A
Other versions
GB2030415A (en
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
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Publication of GB2030415A publication Critical patent/GB2030415A/en
Application granted granted Critical
Publication of GB2030415B publication Critical patent/GB2030415B/en
Expired 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)
  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)
GB7927958A 1978-09-01 1979-08-10 Focus detection device Expired GB2030415B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10735478A JPS5535317A (en) 1978-09-01 1978-09-01 Focus detector of camera

Publications (2)

Publication Number Publication Date
GB2030415A GB2030415A (en) 1980-04-02
GB2030415B true GB2030415B (en) 1983-03-09

Family

ID=14456927

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7927958A Expired GB2030415B (en) 1978-09-01 1979-08-10 Focus detection device

Country Status (4)

Country Link
JP (1) JPS5535317A (en)
DE (1) DE2935303C2 (en)
FR (1) FR2435054A1 (en)
GB (1) GB2030415B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5759107A (en) * 1980-09-26 1982-04-09 Hitachi Ltd Method and device for measuring plate thickness
GB2195214B (en) * 1980-12-10 1988-10-26 Emi Ltd Automatic focussing system for an optical system
JPS58189606A (en) * 1982-04-30 1983-11-05 Fuji Electric Co Ltd Automatic focus adjusting device of optical instrument

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906219A (en) * 1973-10-09 1975-09-16 Honeywell Inc Focus detecting apparatus
FR2338504A1 (en) * 1976-01-15 1977-08-12 Leitz Ernst Gmbh Auto focus with spatial filtering - has pairwise interrogation of photoelectric diodes and concentrator for optical fluxes
DE2711755A1 (en) * 1976-03-17 1977-09-22 Fuji Photo Film Co Ltd DEVICE FOR AUTOMATIC FOCUSING OF IMAGES
JPS5529878A (en) * 1978-08-24 1980-03-03 Asahi Optical Co Ltd Focus detector of camera

Also Published As

Publication number Publication date
FR2435054B1 (en) 1983-03-04
GB2030415A (en) 1980-04-02
DE2935303A1 (en) 1980-03-13
DE2935303C2 (en) 1982-05-19
JPS5535317A (en) 1980-03-12
FR2435054A1 (en) 1980-03-28

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930810