JPS5776569A - Control circuit of scanning system - Google Patents
Control circuit of scanning systemInfo
- Publication number
- JPS5776569A JPS5776569A JP15303280A JP15303280A JPS5776569A JP S5776569 A JPS5776569 A JP S5776569A JP 15303280 A JP15303280 A JP 15303280A JP 15303280 A JP15303280 A JP 15303280A JP S5776569 A JPS5776569 A JP S5776569A
- Authority
- JP
- Japan
- Prior art keywords
- scanning system
- return
- turned
- time
- short
- 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
- 239000003990 capacitor Substances 0.000 abstract 2
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
- G03B27/00—Photographic printing apparatus
- G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
- G03B27/52—Details
- G03B27/522—Projection optics
- G03B27/525—Projection optics for slit exposure
- G03B27/526—Projection optics for slit exposure in which the projection optics move
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Optical Systems Of Projection Type Copiers (AREA)
Abstract
PURPOSE:To always return a scanning system to the same position, by extending an operation time of a driving means of the scanning system in accordance with a return time of the scanning system. CONSTITUTION:A transistor TR3 is turned on by a return signal sent from a control part, a return clutch CL is turned on, and return of a scanning system such as a copying machine, etc. is started. As a result, a relay RA is turned on, a contact RA-a is closed, a transistor TR1 whose base becomes high potential is turned off, a capacitor C is discharged, and in case when a return time is short at the time of returning from a short distance, the on-period of the clutch CL is extended from a constant position until the scanning system is returned at a constant speed in accordance with a time constant decided by the capacitor C and a resistance R5. Accordingly, even in case when the return distance is short, the scanning system is returned to the same position without stopping before reaching the fixed position by low inertia.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15303280A JPS5776569A (en) | 1980-10-31 | 1980-10-31 | Control circuit of scanning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15303280A JPS5776569A (en) | 1980-10-31 | 1980-10-31 | Control circuit of scanning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5776569A true JPS5776569A (en) | 1982-05-13 |
Family
ID=15553470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15303280A Pending JPS5776569A (en) | 1980-10-31 | 1980-10-31 | Control circuit of scanning system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5776569A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59100429A (en) * | 1982-11-30 | 1984-06-09 | Mita Ind Co Ltd | Driving device for moving body for exposure |
-
1980
- 1980-10-31 JP JP15303280A patent/JPS5776569A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59100429A (en) * | 1982-11-30 | 1984-06-09 | Mita Ind Co Ltd | Driving device for moving body for exposure |
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