DE2951128C2 - - Google Patents

Info

Publication number
DE2951128C2
DE2951128C2 DE2951128A DE2951128A DE2951128C2 DE 2951128 C2 DE2951128 C2 DE 2951128C2 DE 2951128 A DE2951128 A DE 2951128A DE 2951128 A DE2951128 A DE 2951128A DE 2951128 C2 DE2951128 C2 DE 2951128C2
Authority
DE
Germany
Prior art keywords
capacitor
quantity measuring
light quantity
measuring device
voltage
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 - Lifetime
Application number
DE2951128A
Other languages
German (de)
English (en)
Other versions
DE2951128A1 (de
Inventor
Francis Tsutomu Lakewood Col. Us Ogawa
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 DE2951128A1 publication Critical patent/DE2951128A1/de
Application granted granted Critical
Publication of DE2951128C2 publication Critical patent/DE2951128C2/de
Granted 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)
  • Analogue/Digital Conversion (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
DE19792951128 1979-01-04 1979-12-19 Verfahren zum umwandeln von empfangenem licht in digitale impulssignale und vorrichtung zur durchfuehrung des verfahrens Granted DE2951128A1 (de)

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
DE2951128A1 DE2951128A1 (de) 1980-07-17
DE2951128C2 true DE2951128C2 (US20020051482A1-20020502-M00012.png) 1990-10-04

Family

ID=21693905

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19792951128 Granted DE2951128A1 (de) 1979-01-04 1979-12-19 Verfahren zum umwandeln von empfangenem licht in digitale impulssignale und vorrichtung zur durchfuehrung des verfahrens

Country Status (6)

Country Link
US (1) US4249109A (US20020051482A1-20020502-M00012.png)
JP (2) JPS5593133A (US20020051482A1-20020502-M00012.png)
CA (1) CA1124314A (US20020051482A1-20020502-M00012.png)
DE (1) DE2951128A1 (US20020051482A1-20020502-M00012.png)
FR (1) FR2446049A1 (US20020051482A1-20020502-M00012.png)
GB (2) GB2039064B (US20020051482A1-20020502-M00012.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3511376A1 (de) * 1984-04-05 1985-10-24 Telefonaktiebolaget L M Ericsson, Stockholm Verfahren und vorrichtung zur messung der beleuchtungsstaerke von einfallendem licht

Families Citing this family (8)

* 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
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
WO2007134062A2 (en) * 2006-05-08 2007-11-22 Slicex, Inc. Sensing light and sensing the state of a memory cell
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3511376A1 (de) * 1984-04-05 1985-10-24 Telefonaktiebolaget L M Ericsson, Stockholm Verfahren und vorrichtung zur messung der beleuchtungsstaerke von einfallendem licht

Also Published As

Publication number Publication date
GB2115165A (en) 1983-09-01
FR2446049B1 (US20020051482A1-20020502-M00012.png) 1984-01-27
US4249109A (en) 1981-02-03
GB2039064A (en) 1980-07-30
JPS58113727A (ja) 1983-07-06
DE2951128A1 (de) 1980-07-17
JPS5933842B2 (ja) 1984-08-18
FR2446049A1 (fr) 1980-08-01
GB2039064B (en) 1983-07-20
JPS5593133A (en) 1980-07-15
GB2115165B (en) 1984-02-01
CA1124314A (en) 1982-05-25

Similar Documents

Publication Publication Date Title
DE3842279C2 (de) Lichtintensitätsdetektorschaltung
DE1937550C3 (de) Blitzlichtgerät für fotografische Aufnahmen
DE3420264C2 (US20020051482A1-20020502-M00012.png)
DE1966984A1 (de) Elektronenblitzgeraet mit fremdblitzsperre
DE3007625A1 (de) Elektronische blitzlichtvorrichtung
DE2951128C2 (US20020051482A1-20020502-M00012.png)
DE2727904B2 (de) Kamera mit einem Synchronanschluß und einem damit Kuppelbaren, von der Kamera aus steuerbaren Computerblitzgerät
DE1937405A1 (de) Lichtempfindliche Steuerschaltung
DE1288428B (de) Vorrichtung zur Steuerung der von einem fotografischen Elektronenblitzgeraet ausgestrahlten Lichtmenge
DE1764204B1 (de) Elektronenbli/tzgeraet
DE2051244A1 (de) Elektronenblitzgerät
DE2309170A1 (de) Anordnung zur belichtungssteuerung fuer fotografische kameras
DE2202750C3 (de) Beleuchtungseinrichtung, insbesondere Elektronenblitzgerät mit automatischer Blitzbegrenzung für fotografische Zwecke
DE3019071C2 (US20020051482A1-20020502-M00012.png)
DE3928809A1 (de) Schaltungsanordnung zum speisen einer last
DE3490472T1 (de) Schaltungsanordnung eines Strom-Impuls-Konverters mit veränderbarer Zeitkonstante
DE2939139A1 (de) Entfernungsmessvorrichtung
DE2728150C2 (de) Analog/Digital-Umsetzer
DE2219087C3 (de) Schaltungsanordnung für photographische Geräte mit diskreten Anzeige- und/oder Steuerelementen zur Belichtungsmessung und/oder -Steuerung
DE3225557A1 (de) Schaltung fuer eine computer-blitzsteuerung
DE2166613B2 (de) Elektronenblitzgerät mit einer Blitzauslöse- und einer Blitzbegrenzervorrichtung
DE2423527A1 (de) Elektronenblitzgeraet mit belichtungsmess- und blitzbegrenzungseinrichtung
DE1772239B2 (de) Geraet zur automatischen steuerung der von einer elektronischen blitzlichtroehre auszustrahlenden lichtmenge
DE2729439C2 (de) Elektronen-Blitzgerät
DE2738984A1 (de) Elektronenblitzgeraet fuer fotografische aufnahmezwecke

Legal Events

Date Code Title Description
8127 New person/name/address of the applicant

Owner name: ASAHI OPTICAL CO. LTD., TOKYO, JP

8128 New person/name/address of the agent

Representative=s name: GRAMM, W., DIPL.-ING. LINS, E., DIPL.-PHYS., PAT.-

8110 Request for examination paragraph 44
8120 Willingness to grant licences paragraph 23
D2 Grant after examination
8364 No opposition during term of opposition