JPS5753736A - Automatic exposure photographic device for endoscope - Google Patents
Automatic exposure photographic device for endoscopeInfo
- Publication number
- JPS5753736A JPS5753736A JP55129479A JP12947980A JPS5753736A JP S5753736 A JPS5753736 A JP S5753736A JP 55129479 A JP55129479 A JP 55129479A JP 12947980 A JP12947980 A JP 12947980A JP S5753736 A JPS5753736 A JP S5753736A
- Authority
- JP
- Japan
- Prior art keywords
- delay
- shutter
- delay time
- closed
- circuit
- 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.)
- Pending
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
- G03B7/081—Analogue circuits
- G03B7/083—Analogue circuits for control of exposure time
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Exposure Control For Cameras (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
- Endoscopes (AREA)
Abstract
PURPOSE:To correct operation delay when a shutter is closed, by providing a delay circuit which starts exposure calculation (exposure integration) within prescribed operation delay time from releasing operation to the closure of the shutter. CONSTITUTION:When a release button 3 is pushed with a light source 16ON, a synchro switch 6 is closed to generate a release signal. The release signal actuates a delay circuit 25 and a delay signal is outputted delay time TD2 later to turn off an analog switch 23 through a switch driving circuit 24, so that an integrating circuit 22 starts integrating the quantity of light. A shutter 5, on the other hand, is opened delay time TD1 after the release button is pushed. As the integral output goes up to a prescribed value, a solenoid 19 is driven and a light-source shutter 18 is closed delay time TD3 later. Then, TD2 is set equal to TD1-TD3 to compensate operation delay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55129479A JPS5753736A (en) | 1980-09-18 | 1980-09-18 | Automatic exposure photographic device for endoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55129479A JPS5753736A (en) | 1980-09-18 | 1980-09-18 | Automatic exposure photographic device for endoscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5753736A true JPS5753736A (en) | 1982-03-30 |
Family
ID=15010494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55129479A Pending JPS5753736A (en) | 1980-09-18 | 1980-09-18 | Automatic exposure photographic device for endoscope |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5753736A (en) |
-
1980
- 1980-09-18 JP JP55129479A patent/JPS5753736A/en active Pending
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