HK114493A - Circuit for detecting back light - Google Patents

Circuit for detecting back light

Info

Publication number
HK114493A
HK114493A HK1144/93A HK114493A HK114493A HK 114493 A HK114493 A HK 114493A HK 1144/93 A HK1144/93 A HK 1144/93A HK 114493 A HK114493 A HK 114493A HK 114493 A HK114493 A HK 114493A
Authority
HK
Hong Kong
Prior art keywords
circuit
back light
detecting back
detecting
light
Prior art date
Application number
HK1144/93A
Other languages
English (en)
Inventor
Sinji Nagaoka
Yoichi Seki
Hiroyuki Saito
Michio Taniwaki
Original Assignee
Seikosha Kk
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 Seikosha Kk filed Critical Seikosha Kk
Publication of HK114493A publication Critical patent/HK114493A/xx

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
    • G03B7/099—Arrangement of photoelectric elements in or on the camera

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Exposure Control For Cameras (AREA)
HK1144/93A 1987-12-29 1993-10-28 Circuit for detecting back light HK114493A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62336678A JP2526958B2 (ja) 1987-12-29 1987-12-29 逆光検出回路

Publications (1)

Publication Number Publication Date
HK114493A true HK114493A (en) 1993-11-05

Family

ID=18301666

Family Applications (1)

Application Number Title Priority Date Filing Date
HK1144/93A HK114493A (en) 1987-12-29 1993-10-28 Circuit for detecting back light

Country Status (5)

Country Link
US (1) US4945378A (ja)
JP (1) JP2526958B2 (ja)
DE (1) DE3844245A1 (ja)
GB (1) GB2211292B (ja)
HK (1) HK114493A (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7029473B2 (en) * 1998-10-20 2006-04-18 St. Francis Medical Technologies, Inc. Deflectable spacer for use as an interspinous process implant and method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6056332B2 (ja) * 1976-06-23 1985-12-10 株式会社日立製作所 Ａ−ｄ変換回路
JPS533260A (en) * 1976-06-29 1978-01-12 Mitsubishi Electric Corp Film thickness measuring device of transparent thin film
JPS5629253A (en) * 1979-08-15 1981-03-24 Ricoh Co Ltd Automatic original position correcting device of automatic copying machine
JPS5946521A (ja) * 1982-09-08 1984-03-15 Canon Inc 測光回路
JPS60134567A (ja) * 1983-12-22 1985-07-17 Canon Inc 撮像装置
US4690536A (en) * 1985-09-09 1987-09-01 Minolta Camera Kabushiki Kaisha Exposure control device for a camera in flash photography
DE3542511A1 (de) * 1985-12-02 1987-06-04 Leitz Ernst Gmbh Verfahren und schaltungsanordnung zur automatischen bestimmung eines lichtwertes
US4809031A (en) * 1986-12-11 1989-02-28 Ricoh Company, Ltd. Photometer for use in a camera

Also Published As

Publication number Publication date
US4945378A (en) 1990-07-31
GB2211292A (en) 1989-06-28
JP2526958B2 (ja) 1996-08-21
GB2211292B (en) 1991-10-30
JPH01179025A (ja) 1989-07-17
DE3844245A1 (de) 1989-07-13
GB8830295D0 (en) 1989-02-22

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