JPS5721643B2 - - Google Patents
Info
- Publication number
- JPS5721643B2 JPS5721643B2 JP4095373A JP4095373A JPS5721643B2 JP S5721643 B2 JPS5721643 B2 JP S5721643B2 JP 4095373 A JP4095373 A JP 4095373A JP 4095373 A JP4095373 A JP 4095373A JP S5721643 B2 JPS5721643 B2 JP S5721643B2
- Authority
- JP
- Japan
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/44—Electric circuits
-
- 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
- G03B7/081—Analogue circuits
- G03B7/083—Analogue circuits for control of exposure time
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Exposure Control For Cameras (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2217659A DE2217659C3 (de) | 1972-04-12 | 1972-04-12 | Belichtungsmefigerät |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4918079A JPS4918079A (en:Method) | 1974-02-18 |
| JPS5721643B2 true JPS5721643B2 (en:Method) | 1982-05-08 |
Family
ID=5841746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4095373A Expired JPS5721643B2 (en:Method) | 1972-04-12 | 1973-04-12 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3873827A (en:Method) |
| JP (1) | JPS5721643B2 (en:Method) |
| BE (1) | BE798152A (en:Method) |
| DE (1) | DE2217659C3 (en:Method) |
| NL (1) | NL7217228A (en:Method) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4034384A (en) * | 1973-01-24 | 1977-07-05 | Canon Kabushiki Kaisha | Exposure meter circuit of camera with matching network for flash device |
| DE2639199C2 (de) * | 1975-09-01 | 1983-12-01 | Nippon Kogaku K.K., Tokyo | TTL-Meßvorrichtung für eine einäugige Spiegelreflexkamera |
| JPS6024410B2 (ja) * | 1976-06-28 | 1985-06-12 | 日本電気株式会社 | 光電変換回路 |
| US4636053A (en) * | 1978-02-24 | 1987-01-13 | Canon Kabushiki Kaisha | Distance detecting device |
| US5541706A (en) * | 1992-10-22 | 1996-07-30 | Nikon Corporation | Exposure calculation device for a camera |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3116673A (en) * | 1961-07-27 | 1964-01-07 | Bogopolsky Raphael | Automatic regulating device for the lighting of a photo-sensitive film during filming |
| US3424908A (en) * | 1966-10-19 | 1969-01-28 | Gen Electric | Amplifier for photocell |
| US3605030A (en) * | 1967-06-26 | 1971-09-14 | Beckman Instruments Inc | High sensitivity amplifier with peak detector and storage means |
| DE2006025A1 (de) * | 1970-02-11 | 1971-08-26 | Leitz Ernst Gmbh | Schaltungsanordnung fur Behchtungs messer |
| US3670184A (en) * | 1970-02-13 | 1972-06-13 | Tokyo Shibaura Electric Co | Light sensitive amplifier circuit having improved feedback arrangement |
| FR2138340B1 (en:Method) * | 1971-05-24 | 1973-05-25 | Trt Telecom Radio Electr | |
| US3723651A (en) * | 1971-12-27 | 1973-03-27 | Rca Corp | Optically-scanned liquid-crystal projection display |
-
1972
- 1972-04-12 DE DE2217659A patent/DE2217659C3/de not_active Expired
- 1972-12-18 NL NL7217228A patent/NL7217228A/xx not_active Application Discontinuation
-
1973
- 1973-03-02 US US337768A patent/US3873827A/en not_active Expired - Lifetime
- 1973-04-12 BE BE129959A patent/BE798152A/xx unknown
- 1973-04-12 JP JP4095373A patent/JPS5721643B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2217659C3 (de) | 1978-09-21 |
| BE798152A (fr) | 1973-10-12 |
| DE2217659B2 (de) | 1978-02-02 |
| NL7217228A (en:Method) | 1973-10-16 |
| DE2217659A1 (de) | 1973-10-18 |
| JPS4918079A (en:Method) | 1974-02-18 |
| US3873827A (en) | 1975-03-25 |