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
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)
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 (US07655746-20100202-C00011.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)
Cited By (1)
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)
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)
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 |
-
1979
- 1979-01-04 US US06/000,999 patent/US4249109A/en not_active Expired - Lifetime
- 1979-11-13 CA CA339,662A patent/CA1124314A/en not_active Expired
- 1979-11-16 GB GB7939786A patent/GB2039064B/en not_active Expired
- 1979-12-19 DE DE19792951128 patent/DE2951128A1/de active Granted
- 1979-12-21 JP JP16673679A patent/JPS5593133A/ja active Pending
- 1979-12-28 FR FR7932007A patent/FR2446049A1/fr active Granted
-
1982
- 1982-08-23 GB GB08224192A patent/GB2115165B/en not_active Expired
- 1982-12-10 JP JP57216772A patent/JPS5933842B2/ja not_active Expired
Cited By (1)
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 |
---|---|
JPS5933842B2 (ja) | 1984-08-18 |
GB2115165A (en) | 1983-09-01 |
DE2951128A1 (de) | 1980-07-17 |
GB2039064B (en) | 1983-07-20 |
GB2039064A (en) | 1980-07-30 |
JPS5593133A (en) | 1980-07-15 |
JPS58113727A (ja) | 1983-07-06 |
FR2446049A1 (fr) | 1980-08-01 |
CA1124314A (en) | 1982-05-25 |
FR2446049B1 (US07655746-20100202-C00011.png) | 1984-01-27 |
US4249109A (en) | 1981-02-03 |
GB2115165B (en) | 1984-02-01 |
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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 |