JPS532567B2 - - Google Patents
Info
- Publication number
- JPS532567B2 JPS532567B2 JP9367972A JP9367972A JPS532567B2 JP S532567 B2 JPS532567 B2 JP S532567B2 JP 9367972 A JP9367972 A JP 9367972A JP 9367972 A JP9367972 A JP 9367972A JP S532567 B2 JPS532567 B2 JP S532567B2
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K21/00—Details of pulse counters or frequency dividers
-
- 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
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/60—Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers
- G06F7/62—Performing operations exclusively by counting total number of pulses ; Multiplication, division or derived operations using combined denominational and incremental processing by counters, i.e. without column shift
Landscapes
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Optimization (AREA)
- Mathematical Analysis (AREA)
- Computing Systems (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Computational Mathematics (AREA)
- Exposure Control For Cameras (AREA)
- Shutters For Cameras (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9367972A JPS532567B2 (US06544258-20030408-M00015.png) | 1972-09-20 | 1972-09-20 | |
| US39670573 US3824608A (en) | 1972-09-20 | 1973-09-13 | Electric shutter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9367972A JPS532567B2 (US06544258-20030408-M00015.png) | 1972-09-20 | 1972-09-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4955326A JPS4955326A (US06544258-20030408-M00015.png) | 1974-05-29 |
| JPS532567B2 true JPS532567B2 (US06544258-20030408-M00015.png) | 1978-01-30 |
Family
ID=14089079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9367972A Expired JPS532567B2 (US06544258-20030408-M00015.png) | 1972-09-20 | 1972-09-20 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3824608A (US06544258-20030408-M00015.png) |
| JP (1) | JPS532567B2 (US06544258-20030408-M00015.png) |
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4015274A (en) * | 1972-11-13 | 1977-03-29 | Ricoh Co., Ltd. | Memory device of an electrical shutter for single lens reflex camera |
| DE2364866C2 (de) * | 1972-12-29 | 1983-11-24 | Minolta Camera K.K., Osaka | Automatischer Belichtungszeitsteuerstromkreis |
| US4047189A (en) * | 1973-02-05 | 1977-09-06 | Ernst Leitz Gmbh | Electronic storage, indicator and exposure time control device for photographic cameras |
| US4125846A (en) * | 1973-03-07 | 1978-11-14 | Canon Kabushiki Kaisha | Electronic exposure control apparatus |
| DE2462472C2 (de) * | 1973-03-07 | 1983-01-13 | Canon K.K., Tokyo | Belichtungssteuerschaltung in einer Kamera |
| JPS5433151B2 (US06544258-20030408-M00015.png) * | 1973-04-12 | 1979-10-18 | ||
| US4081805A (en) * | 1973-08-10 | 1978-03-28 | Ricoh Co., Ltd. | Apparatus for displaying the amount of exposure in a single lens reflex camera using an electronic shutter |
| JPS5631572B2 (US06544258-20030408-M00015.png) * | 1973-08-24 | 1981-07-22 | ||
| JPS5045629A (US06544258-20030408-M00015.png) * | 1973-08-24 | 1975-04-23 | ||
| US4191459A (en) * | 1973-08-24 | 1980-03-04 | Seiko Koki Kabushiki Kaisha | Digital camera shutter control circuit having memory read-out/shutter opening synchronization |
| US4106033A (en) * | 1973-10-17 | 1978-08-08 | Canon Kabushiki Kaisha | System for indicating photographing conditions |
| US4090208A (en) * | 1973-12-11 | 1978-05-16 | Canon Kabushiki Kaisha | Electronic exposure control apparatus for cameras |
| DE2408908A1 (de) * | 1974-02-25 | 1975-09-04 | Leitz Ernst Gmbh | Digitaler zeitbildner fuer den verschluss einer fotografischen kamera |
| JPS50123337A (US06544258-20030408-M00015.png) * | 1974-03-14 | 1975-09-27 | ||
| US4047187A (en) * | 1974-04-01 | 1977-09-06 | Canon Kabushiki Kaisha | System for exposure measurement and/or focus detection by means of image senser |
| US4034383A (en) * | 1974-04-23 | 1977-07-05 | Canon Kabushiki Kaisha | Exposure control device |
| JPS5720607B2 (US06544258-20030408-M00015.png) * | 1974-05-16 | 1982-04-30 | ||
| US4092652A (en) * | 1974-07-27 | 1978-05-30 | Canon Kabushiki Kaisha | Exposure information indicating device for a camera |
| US4162839A (en) * | 1974-08-30 | 1979-07-31 | Canon Kabushiki Kaisha | Dual preference camera for digitally displaying preset and computered valves |
| JPS5127053A (en) * | 1974-08-30 | 1976-03-06 | Canon Kk | Tanyuryokuyo aad henkansochi |
| US3952253A (en) * | 1974-11-21 | 1976-04-20 | The United States Of America As Represented By The United States Energy Research And Development Administration | Method and means for generating a synchronizing pulse from a repetitive wave of varying frequency |
| JPS51140725A (en) * | 1975-05-30 | 1976-12-03 | Fuji Photo Optical Co Ltd | Exposure time control unit |
| DE2644205A1 (de) * | 1976-09-30 | 1978-04-06 | Agfa Gevaert Ag | Fotografische kamera mit einer digitalen belichtungsregelvorrichtung |
| US4306786A (en) * | 1980-12-19 | 1981-12-22 | Polaroid Corporation | Photographic exposure control with scene light integration level determined as function of pre-exposure ambient scene light detect |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3742826A (en) * | 1970-01-07 | 1973-07-03 | Canon Kk | Exposure control device |
| DE2006025A1 (de) * | 1970-02-11 | 1971-08-26 | Leitz Ernst Gmbh | Schaltungsanordnung fur Behchtungs messer |
| JPS5211223B1 (US06544258-20030408-M00015.png) * | 1970-04-06 | 1977-03-29 | ||
| US3748979A (en) * | 1970-12-28 | 1973-07-31 | Copal Co Ltd | Electronic shutter apparatus for cameras |
-
1972
- 1972-09-20 JP JP9367972A patent/JPS532567B2/ja not_active Expired
-
1973
- 1973-09-13 US US39670573 patent/US3824608A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US3824608A (en) | 1974-07-16 |
| JPS4955326A (US06544258-20030408-M00015.png) | 1974-05-29 |
