JPS57188068A - Variable magnification optical system for copying machine - Google Patents

Variable magnification optical system for copying machine

Info

Publication number
JPS57188068A
JPS57188068A JP7310481A JP7310481A JPS57188068A JP S57188068 A JPS57188068 A JP S57188068A JP 7310481 A JP7310481 A JP 7310481A JP 7310481 A JP7310481 A JP 7310481A JP S57188068 A JPS57188068 A JP S57188068A
Authority
JP
Japan
Prior art keywords
pulley
cam
variable magnification
fixed
optical system
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
Application number
JP7310481A
Other languages
Japanese (ja)
Inventor
Tadao Koike
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
Priority to JP7310481A priority Critical patent/JPS57188068A/en
Publication of JPS57188068A publication Critical patent/JPS57188068A/en
Pending legal-status Critical Current

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
    • 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)
  • Variable Magnification In Projection-Type Copying Machines (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)

Abstract

PURPOSE:To simplify a mechanism, to reduce the number of parts and to simplify the assembly and the adjustment, by driving an exposure scan driving sytem and a variable magnification position controlling system selectively with the same driving source. CONSTITUTION:In the exposure scanning, a clutch 45 of a motor 38 rotates only a pulley 39, and a pulley 44 and a cam 50 are braked, and a wire part stretched between a fixed pulley 43 and the pulley 44 is fixed, and a supporting material 31 is moved to the right in a speed twice as high as the speed of a supporting material 32. When magnifications are varied, the clutch 45 rotates the pulley 44 and the cam 50 as one body, and the pulley 39 is braked, and a wire part stretched between fixed pulleys 37 and 40 is fixed, and only a movable pulley 34 is moved to the left to move mirrors 7 and 8 to the left for a length required for a prescribed variable magnification, and the cam 50 moves a lens 9 through a cam follower 49 to the right by a prescribed extent.
JP7310481A 1981-05-15 1981-05-15 Variable magnification optical system for copying machine Pending JPS57188068A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7310481A JPS57188068A (en) 1981-05-15 1981-05-15 Variable magnification optical system for copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7310481A JPS57188068A (en) 1981-05-15 1981-05-15 Variable magnification optical system for copying machine

Publications (1)

Publication Number Publication Date
JPS57188068A true JPS57188068A (en) 1982-11-18

Family

ID=13508662

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7310481A Pending JPS57188068A (en) 1981-05-15 1981-05-15 Variable magnification optical system for copying machine

Country Status (1)

Country Link
JP (1) JPS57188068A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0110345A2 (en) * 1982-11-30 1984-06-13 Mita Industrial Co., Ltd. Variable magnification electrostatic copying apparatus
JPS59125720A (en) * 1983-01-06 1984-07-20 Fuji Photo Optical Co Ltd Device for converting magnification of image of copying machine
JPS61278834A (en) * 1985-06-04 1986-12-09 Konishiroku Photo Ind Co Ltd Zoom copying machine
JPS6383715A (en) * 1986-09-29 1988-04-14 Matsushita Electric Ind Co Ltd Optical device for variable power copying machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0110345A2 (en) * 1982-11-30 1984-06-13 Mita Industrial Co., Ltd. Variable magnification electrostatic copying apparatus
US4582418A (en) * 1982-11-30 1986-04-15 Mita Industrial Co., Ltd. Variable magnification electrostatic copying apparatus
JPS59125720A (en) * 1983-01-06 1984-07-20 Fuji Photo Optical Co Ltd Device for converting magnification of image of copying machine
JPS61278834A (en) * 1985-06-04 1986-12-09 Konishiroku Photo Ind Co Ltd Zoom copying machine
JPS6383715A (en) * 1986-09-29 1988-04-14 Matsushita Electric Ind Co Ltd Optical device for variable power copying machine

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