FR2241801B1 - - Google Patents
Info
- Publication number
- FR2241801B1 FR2241801B1 FR7428975A FR7428975A FR2241801B1 FR 2241801 B1 FR2241801 B1 FR 2241801B1 FR 7428975 A FR7428975 A FR 7428975A FR 7428975 A FR7428975 A FR 7428975A FR 2241801 B1 FR2241801 B1 FR 2241801B1
- 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
- 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
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/58—Means for varying duration of "open" period of shutter
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Exposure Control For Cameras (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
- Shutters For Cameras (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9500773A JPS5631572B2 (fr) | 1973-08-24 | 1973-08-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2241801A1 FR2241801A1 (fr) | 1975-03-21 |
FR2241801B1 true FR2241801B1 (fr) | 1978-08-11 |
Family
ID=14125868
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7428975A Expired FR2241801B1 (fr) | 1973-08-24 | 1974-08-23 |
Country Status (5)
Country | Link |
---|---|
US (1) | US4025929A (fr) |
JP (1) | JPS5631572B2 (fr) |
DE (1) | DE2440638C3 (fr) |
FR (1) | FR2241801B1 (fr) |
GB (1) | GB1477875A (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5250722A (en) * | 1975-10-21 | 1977-04-23 | Canon Inc | Circuit system for preventing erroneous operation of camera |
JPS5294127A (en) * | 1976-02-04 | 1977-08-08 | Canon Inc | Bulb shooting control system for electronic shutter camera |
US4306785A (en) * | 1979-02-01 | 1981-12-22 | Asahi Kogaku Kogyo Kabushiki Kaisha | Camera exposure time control circuit |
JPS60189564U (ja) * | 1984-05-28 | 1985-12-16 | ロ−ム株式会社 | メツキ装置 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1217779B (de) * | 1964-04-10 | 1966-05-26 | Compur Werk Gmbh & Co | Schaltanordnung zur elektrischen Steuerung der Belichtungszeit eines Kameraverschlusses |
US3748979A (en) * | 1970-12-28 | 1973-07-31 | Copal Co Ltd | Electronic shutter apparatus for cameras |
US3836262A (en) * | 1971-07-07 | 1974-09-17 | Minolta Camera Kk | Indicator circuit |
JPS4831941A (fr) * | 1971-08-27 | 1973-04-26 | ||
US3827065A (en) * | 1971-08-30 | 1974-07-30 | Copal Co Ltd | Warning circuit of an electric shutter |
DE2220204C2 (de) * | 1972-04-25 | 1974-05-16 | Labtronic Ag Gesellschaft Fuer Klinische Labortechnik, Zuerich (Schweiz) | Photometer zur digitalen Anzeige der Konzentration einer Meßprobe in einer Küvette |
JPS532567B2 (fr) * | 1972-09-20 | 1978-01-30 |
-
1973
- 1973-08-24 JP JP9500773A patent/JPS5631572B2/ja not_active Expired
-
1974
- 1974-08-07 GB GB3480074A patent/GB1477875A/en not_active Expired
- 1974-08-23 FR FR7428975A patent/FR2241801B1/fr not_active Expired
- 1974-08-23 US US05/499,995 patent/US4025929A/en not_active Expired - Lifetime
- 1974-08-24 DE DE2440638A patent/DE2440638C3/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5631572B2 (fr) | 1981-07-22 |
FR2241801A1 (fr) | 1975-03-21 |
DE2440638A1 (de) | 1975-03-06 |
DE2440638B2 (de) | 1979-10-04 |
US4025929A (en) | 1977-05-24 |
GB1477875A (en) | 1977-06-29 |
JPS5045631A (fr) | 1975-04-23 |
DE2440638C3 (de) | 1980-07-10 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |