GB1239774A - Variable magnification exposure device for photo-copying apparatus - Google Patents
Variable magnification exposure device for photo-copying apparatusInfo
- Publication number
- GB1239774A GB1239774A GB4640568A GB4640568A GB1239774A GB 1239774 A GB1239774 A GB 1239774A GB 4640568 A GB4640568 A GB 4640568A GB 4640568 A GB4640568 A GB 4640568A GB 1239774 A GB1239774 A GB 1239774A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mirror
- movable
- focusing element
- photo
- copying apparatus
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
- G03G15/26—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the charge pattern is obtained by projection of the entire image, i.e. whole-frame projection
-
- 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
- G03B27/523—Projection optics for full time exposure
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
- G03G15/041—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with variable magnification
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Systems Of Projection Type Copiers (AREA)
Abstract
1,239,774. Photo-copying apparatus. RICOH K.K. Sept.30, 1968 [Sept.29, 1967(3)], No.46405/68. Headings G2A and G2H. Photo-copying apparatus having an original support surface and a copy sheet support surface is provided with an optical projection system comprising a focusing element and at least two mirrors, at least two of the focusing element and the mirrors being displaceable to alter the magnification. The focusing element comprises a lens and a mirror. As shown, the first mirror 4 is stationary and the element 5 and a second mirror 6 are movable in the direction indicated. The arrangement is provided in an electrostatic printer having a cutter 10 and a developing chamber 1d. In another embodiment Fig. 3 (not shown), the light from the original falls first on a movable focusing element (27) and then on to two movable mirrors (29), (30) before impinging on the copy material. In a further embodiment Figs.4, 5 (not shown), the light path consists of a first movable mirror (44), a fixed focusing element (47) and a second movable mirror (46).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6268967 | 1967-09-29 | ||
JP6269067 | 1967-09-29 | ||
JP6269167 | 1967-09-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1239774A true GB1239774A (en) | 1971-07-21 |
Family
ID=27297925
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4640568A Expired GB1239774A (en) | 1967-09-29 | 1968-09-30 | Variable magnification exposure device for photo-copying apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1239774A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2201252A (en) * | 1986-12-15 | 1988-08-24 | Brother Ind Ltd | Imaging device |
US4816873A (en) * | 1986-10-27 | 1989-03-28 | Brother Kogyo Kabushiki Kaisha | Imaging device |
-
1968
- 1968-09-30 GB GB4640568A patent/GB1239774A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4816873A (en) * | 1986-10-27 | 1989-03-28 | Brother Kogyo Kabushiki Kaisha | Imaging device |
GB2201252A (en) * | 1986-12-15 | 1988-08-24 | Brother Ind Ltd | Imaging device |
GB2201252B (en) * | 1986-12-15 | 1990-11-14 | Brother Ind Ltd | Imaging device |
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