JPS5687010A - Variable magnification optical device - Google Patents

Variable magnification optical device

Info

Publication number
JPS5687010A
JPS5687010A JP16434479A JP16434479A JPS5687010A JP S5687010 A JPS5687010 A JP S5687010A JP 16434479 A JP16434479 A JP 16434479A JP 16434479 A JP16434479 A JP 16434479A JP S5687010 A JPS5687010 A JP S5687010A
Authority
JP
Japan
Prior art keywords
copying
lens
disc
optical path
original
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
JP16434479A
Other languages
Japanese (ja)
Inventor
Koichi Miyamoto
Hiroo Kobayashi
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP16434479A priority Critical patent/JPS5687010A/en
Publication of JPS5687010A publication Critical patent/JPS5687010A/en
Pending legal-status Critical Current

Links

Landscapes

  • Lenses (AREA)
  • Variable Magnification In Projection-Type Copying Machines (AREA)

Abstract

PURPOSE: To enable the reduction copying and magnification copying which are mutually in a reciprocal relation other than unmagnification copying to be performed easily and accurately by the simple constitution of rotating an imaging element 180° around the center of the entire optical path.
CONSTITUTION: An original 1 is placed on an original platen glass 2. In the case of magnification copying, a lens L1 is placed on the optical path on the side near the original 1 by the rotation controlling of a disc 4, and the image of the original 1 is formed on the outside circumferential surface of a photosenstivie drum 3 via a stationary mirror M5, the lens L1 and a stationary mirror M16. In the case of reduction copying in a reciprocal relation with this, the disc 4 rotates 180° from the state of the magnification copying and the lens L1 is placed on the side far from the original 1 in the optical path. In the case of unmagnification copying, the lens L1 is placed in the position deviated from the optical path by the rotation controlling of the disc 4 and a lens L2 for unmagnification fixed to the disc 5 is inserted into the optical path by the rotation controlling of the disc 4.
COPYRIGHT: (C)1981,JPO&Japio
JP16434479A 1979-12-18 1979-12-18 Variable magnification optical device Pending JPS5687010A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16434479A JPS5687010A (en) 1979-12-18 1979-12-18 Variable magnification optical device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16434479A JPS5687010A (en) 1979-12-18 1979-12-18 Variable magnification optical device

Publications (1)

Publication Number Publication Date
JPS5687010A true JPS5687010A (en) 1981-07-15

Family

ID=15791378

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16434479A Pending JPS5687010A (en) 1979-12-18 1979-12-18 Variable magnification optical device

Country Status (1)

Country Link
JP (1) JPS5687010A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60205532A (en) * 1984-03-30 1985-10-17 Fuji Xerox Co Ltd Optical system of copying machine
JPS6382409A (en) * 1986-09-27 1988-04-13 Fuji Photo Optical Co Ltd Optical system for copying machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60205532A (en) * 1984-03-30 1985-10-17 Fuji Xerox Co Ltd Optical system of copying machine
JPS6382409A (en) * 1986-09-27 1988-04-13 Fuji Photo Optical Co Ltd Optical system for copying machine

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