FR2331047B1 - - Google Patents
Info
- Publication number
- FR2331047B1 FR2331047B1 FR7633507A FR7633507A FR2331047B1 FR 2331047 B1 FR2331047 B1 FR 2331047B1 FR 7633507 A FR7633507 A FR 7633507A FR 7633507 A FR7633507 A FR 7633507A FR 2331047 B1 FR2331047 B1 FR 2331047B1
- Authority
- FR
- France
- 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
- 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
- G03B7/091—Digital circuits
- G03B7/093—Digital circuits for control of exposure time
-
- 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
- G01J1/4209—Photoelectric exposure meters for determining the exposure time in recording or reproducing
- G01J1/4214—Photoelectric exposure meters for determining the exposure time in recording or reproducing specially adapted for view-taking apparatus
-
- 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
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/18—Signals indicating condition of a camera member or suitability of light
- G03B17/20—Signals indicating condition of a camera member or suitability of light visible in viewfinder
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Indication In Cameras, And Counting Of Exposures (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 |
|---|---|---|---|
| JP50133375A JPS6018927B2 (ja) | 1975-11-06 | 1975-11-06 | カメラのデイジタル表示回路 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2331047A1 FR2331047A1 (fr) | 1977-06-03 |
| FR2331047B1 true FR2331047B1 (US20050192411A1-20050901-C00001.png) | 1978-10-20 |
Family
ID=15103249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7633507A Granted FR2331047A1 (fr) | 1975-11-06 | 1976-11-05 | Circuit indicateur numerique de temps d'exposition pour un appareil de prise de vues |
Country Status (5)
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5421337A (en) * | 1977-07-18 | 1979-02-17 | Hitachi Ltd | Display method for level check and its circuit |
| DE2829656A1 (de) * | 1978-07-06 | 1980-01-17 | Rollei Werke Franke Heidecke | Schaltungsanordnung zur belichtungszeitmessung und/oder belichtungszeitsteuerung fuer eine fotografische kamera |
| US4309692A (en) * | 1978-11-14 | 1982-01-05 | Beckman Instruments, Inc. | Integrating analog-to-digital converter |
| US4306785A (en) * | 1979-02-01 | 1981-12-22 | Asahi Kogaku Kogyo Kabushiki Kaisha | Camera exposure time control circuit |
| JPS55118026A (en) * | 1979-03-07 | 1980-09-10 | Asahi Optical Co Ltd | Focus instruction device of camera |
| JPS5756828A (en) * | 1980-09-22 | 1982-04-05 | Olympus Optical Co Ltd | Automatic exposure control camera |
| JPS60148281U (ja) * | 1984-03-13 | 1985-10-02 | 凸版印刷株式会社 | 二重圧力容器 |
| GB8516207D0 (en) * | 1985-06-26 | 1985-07-31 | Samuelson D W | Cinematograph camera flicker control device |
| JPH03187875A (ja) * | 1989-12-16 | 1991-08-15 | Toyo Seikan Kaisha Ltd | 二室型賦圧容器 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2364866C2 (de) * | 1972-12-29 | 1983-11-24 | Minolta Camera K.K., Osaka | Automatischer Belichtungszeitsteuerstromkreis |
| US3972626A (en) * | 1975-06-17 | 1976-08-03 | General Electric Company | Autoranging digital luxmeter |
-
1975
- 1975-11-06 JP JP50133375A patent/JPS6018927B2/ja not_active Expired
-
1976
- 1976-11-02 GB GB45463/76A patent/GB1534326A/en not_active Expired
- 1976-11-04 US US05/738,994 patent/US4089012A/en not_active Expired - Lifetime
- 1976-11-05 DE DE2650788A patent/DE2650788C3/de not_active Expired
- 1976-11-05 FR FR7633507A patent/FR2331047A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| DE2650788B2 (de) | 1978-12-07 |
| GB1534326A (en) | 1978-11-29 |
| FR2331047A1 (fr) | 1977-06-03 |
| DE2650788A1 (de) | 1977-05-18 |
| JPS5256924A (en) | 1977-05-10 |
| US4089012A (en) | 1978-05-09 |
| JPS6018927B2 (ja) | 1985-05-13 |
| DE2650788C3 (de) | 1979-08-16 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |