GB2039064B - Light digitizing circuit for an electrictronic flashdevice - Google Patents

Light digitizing circuit for an electrictronic flashdevice

Info

Publication number
GB2039064B
GB2039064B GB7939786A GB7939786A GB2039064B GB 2039064 B GB2039064 B GB 2039064B GB 7939786 A GB7939786 A GB 7939786A GB 7939786 A GB7939786 A GB 7939786A GB 2039064 B GB2039064 B GB 2039064B
Authority
GB
United Kingdom
Prior art keywords
flashdevice
electrictronic
digitizing circuit
light digitizing
light
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
GB7939786A
Other languages
English (en)
Other versions
GB2039064A (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.)
Rollei of America Inc
Original Assignee
Rollei of America Inc
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 Rollei of America Inc filed Critical Rollei of America Inc
Publication of GB2039064A publication Critical patent/GB2039064A/en
Application granted granted Critical
Publication of GB2039064B publication Critical patent/GB2039064B/en
Expired legal-status Critical Current

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
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene
    • G03B15/03—Combinations of cameras with lighting apparatus; Flash units
    • G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
    • 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
    • G03B2215/00—Special procedures for taking photographs; Apparatus therefor
    • G03B2215/05—Combinations of cameras with electronic flash units

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Stroboscope Apparatuses (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Exposure Control For Cameras (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Analogue/Digital Conversion (AREA)
GB7939786A 1979-01-04 1979-11-16 Light digitizing circuit for an electrictronic flashdevice Expired GB2039064B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/000,999 US4249109A (en) 1979-01-04 1979-01-04 Light digitizing circuit for an electronic flash device

Publications (2)

Publication Number Publication Date
GB2039064A GB2039064A (en) 1980-07-30
GB2039064B true GB2039064B (en) 1983-07-20

Family

ID=21693905

Family Applications (2)

Application Number Title Priority Date Filing Date
GB7939786A Expired GB2039064B (en) 1979-01-04 1979-11-16 Light digitizing circuit for an electrictronic flashdevice
GB08224192A Expired GB2115165B (en) 1979-01-04 1982-08-23 Light digitizing circuit for an electronic flash device

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB08224192A Expired GB2115165B (en) 1979-01-04 1982-08-23 Light digitizing circuit for an electronic flash device

Country Status (6)

Country Link
US (1) US4249109A (US20110232667A1-20110929-C00004.png)
JP (2) JPS5593133A (US20110232667A1-20110929-C00004.png)
CA (1) CA1124314A (US20110232667A1-20110929-C00004.png)
DE (1) DE2951128A1 (US20110232667A1-20110929-C00004.png)
FR (1) FR2446049A1 (US20110232667A1-20110929-C00004.png)
GB (2) GB2039064B (US20110232667A1-20110929-C00004.png)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4333718A (en) * 1980-01-16 1982-06-08 Rollei Of America, Inc. Photographic flash control circuitry having selectively operable internal sensor
SE441867B (sv) * 1984-04-05 1985-11-11 Ericsson Telefon Ab L M Forfarande och anordning for metning av effekten hos infallande ljus
US4843419A (en) * 1987-04-21 1989-06-27 Olympus Optical Co., Ltd. Light quantity measuring system
JPH0656325B2 (ja) * 1987-12-15 1994-07-27 株式会社精工舎 測光回路
JPH06308585A (ja) * 1993-04-27 1994-11-04 Nikon Corp 光電流周波数変換回路
US5497001A (en) * 1994-09-15 1996-03-05 Dittler Brothers Incorporated Flash tube devices
US6295413B1 (en) 1999-02-24 2001-09-25 Nikon Corporation Digitizing circuit of light amount receiving from strobe and control circuit of light amount emitted from strobe
US7476840B2 (en) * 2006-05-08 2009-01-13 Slicex, Inc. Sensing light and sensing the state of a memory cell an aid of a switch controlled by a schmidt trigger
DE102013112553A1 (de) * 2013-11-14 2015-06-03 Odos Imaging Ltd. Beleuchtungsvorrichtung und Verfahren zum Beleuchten eines Objekts

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2232373A (en) * 1938-08-08 1941-02-18 Lithographic Technical Foundat Integrating light meter apparatus
GB1038454A (en) * 1962-12-20 1966-08-10 British Telecomm Res Ltd Improvements in control devices responsive to solar radiation
US3269287A (en) * 1963-07-22 1966-08-30 Clarence S Ost Electronic mechanical system for integrating radiant energy
US3509422A (en) * 1967-10-31 1970-04-28 Research Corp Automatic photographic fill-in flash circuit
US3783336A (en) * 1968-02-13 1974-01-01 Ponder & Best Automatic photoflash devices
GB1275650A (en) * 1968-07-12 1972-05-24 Asahi Optical Co Ltd Exposure and shutter control systems for cameras
US3651744A (en) * 1969-01-13 1972-03-28 Copal Co Ltd Photographic camera
DE2330734A1 (de) * 1973-06-16 1975-01-09 Agfa Gevaert Ag Elektronische belichtungssteuervorrichtung
US4035814A (en) * 1974-09-02 1977-07-12 Asahi Kogaku Kogyo Kabushiki Kaisha Electronic flash apparatus controlled by a digital memory system

Also Published As

Publication number Publication date
JPS5593133A (en) 1980-07-15
GB2115165A (en) 1983-09-01
FR2446049A1 (fr) 1980-08-01
DE2951128C2 (US20110232667A1-20110929-C00004.png) 1990-10-04
JPS5933842B2 (ja) 1984-08-18
FR2446049B1 (US20110232667A1-20110929-C00004.png) 1984-01-27
DE2951128A1 (de) 1980-07-17
GB2115165B (en) 1984-02-01
US4249109A (en) 1981-02-03
JPS58113727A (ja) 1983-07-06
CA1124314A (en) 1982-05-25
GB2039064A (en) 1980-07-30

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
746 Register noted 'licences of right' (sect. 46/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19991115