GB1239774A - Variable magnification exposure device for photo-copying apparatus - Google Patents

Variable magnification exposure device for photo-copying apparatus

Info

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
Application number
GB4640568A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Publication of GB1239774A publication Critical patent/GB1239774A/en
Expired legal-status Critical Current

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).
GB4640568A 1967-09-29 1968-09-30 Variable magnification exposure device for photo-copying apparatus Expired GB1239774A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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