JPS5646219A - Optical device of variable magnification - Google Patents
Optical device of variable magnificationInfo
- Publication number
- JPS5646219A JPS5646219A JP12181879A JP12181879A JPS5646219A JP S5646219 A JPS5646219 A JP S5646219A JP 12181879 A JP12181879 A JP 12181879A JP 12181879 A JP12181879 A JP 12181879A JP S5646219 A JPS5646219 A JP S5646219A
- Authority
- JP
- Japan
- Prior art keywords
- disk
- projection
- projection lens
- lenses
- point symmetry
- 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.)
- Granted
Links
Landscapes
- Variable Magnification In Projection-Type Copying Machines (AREA)
- Facsimile Scanning Arrangements (AREA)
- Lens Barrels (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Lenses (AREA)
Abstract
PURPOSE:To obtain an optical device of variable magnificaion that is easily operated and durable and further provides smooth operation, by varying the magnification by rotating a reversibly usable projection lens around a center position of point symmetry before or after the displacement of the projection lens by about 180 deg.. CONSTITUTION:Projection lenses 1 and 1' show states before and after a change in magnification and projection lens 1 is at about 180 deg. to projection lens 1'. Then, lens 1 is fitted to disk is rotary motion around centers of point symmetry of lenses 1 and 1'. Photographic paper is supplied onto the face that includes image points 4 and 4' of object point 3 off the optical axis. Then, disk 5 is pivoted on center 6 of point symmetry of main body 10 and teeth 7 of gear 9 are provided to its outer circumference. Motor 8 is engaged with disk 5 via gear 9. Adjustment screw 11 fitted in main body 10 is engaged with projection 12 of disk 5 to make fine adjustments of positions and directions of projection lenses 1 and 1'. Because of this constitution, the structure is simple and its operation is pivot motion, providing smoothness.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12181879A JPS5847682B2 (en) | 1979-09-21 | 1979-09-21 | variable magnification optical device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12181879A JPS5847682B2 (en) | 1979-09-21 | 1979-09-21 | variable magnification optical device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5646219A true JPS5646219A (en) | 1981-04-27 |
JPS5847682B2 JPS5847682B2 (en) | 1983-10-24 |
Family
ID=14820684
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12181879A Expired JPS5847682B2 (en) | 1979-09-21 | 1979-09-21 | variable magnification optical device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5847682B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6097316A (en) * | 1983-10-31 | 1985-05-31 | Mita Ind Co Ltd | Variable power optical system and power varying method using this system |
JPS62150213A (en) * | 1985-12-24 | 1987-07-04 | Asahi Optical Co Ltd | Photographing lens mechanism |
JPS63138331A (en) * | 1986-12-01 | 1988-06-10 | Fuji Photo Film Co Ltd | Mask device for photographic printing |
-
1979
- 1979-09-21 JP JP12181879A patent/JPS5847682B2/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6097316A (en) * | 1983-10-31 | 1985-05-31 | Mita Ind Co Ltd | Variable power optical system and power varying method using this system |
JPS62150213A (en) * | 1985-12-24 | 1987-07-04 | Asahi Optical Co Ltd | Photographing lens mechanism |
JPS63138331A (en) * | 1986-12-01 | 1988-06-10 | Fuji Photo Film Co Ltd | Mask device for photographic printing |
Also Published As
Publication number | Publication date |
---|---|
JPS5847682B2 (en) | 1983-10-24 |
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