JPS5494323A - Optical device for copying machine - Google Patents

Optical device for copying machine

Info

Publication number
JPS5494323A
JPS5494323A JP102978A JP102978A JPS5494323A JP S5494323 A JPS5494323 A JP S5494323A JP 102978 A JP102978 A JP 102978A JP 102978 A JP102978 A JP 102978A JP S5494323 A JPS5494323 A JP S5494323A
Authority
JP
Japan
Prior art keywords
mirror
document
shifts
drum
speed
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
JP102978A
Other languages
Japanese (ja)
Inventor
Hiroyuki Miyake
Hiroshi Ogawa
Hirotoshi Kishi
Kazumi Umezawa
Seiji Sagara
Yutaka Hara
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 JP102978A priority Critical patent/JPS5494323A/en
Publication of JPS5494323A publication Critical patent/JPS5494323A/en
Pending legal-status Critical Current

Links

Landscapes

  • Optical Systems Of Projection Type Copiers (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)

Abstract

PURPOSE: To make it possible to dispose the position of an image projection unit with the range of some shiftable allowance on the drum by using the first mirror which shifts parallel together with an original document, the second mirror which shifts in the same direction at its 1/2 speed and compensates the length of an optical path definitely, and in-mirror lens and a change mirror.
CONSTITUTION: Original document is placed on the document tray glass 2 comprising the plane on which the document is placed. Image of the document is focused on the drum 8 by the optical system comprising illuminating lamp 3, the first mirror 4 which shifts together with the lamp 3 parallel with the document glass at scanning speed V, the second mirror 5 which shifts in the same direction at 1/2 speed of that of the first mirror 4 and compensates in order that the optical path length may be constant, the stationary in-mirror lens 6, and change mirror 7. The forming process of the good quality image can be done by inclining the optical axis of the above in-mirror lens 6 with some angle to the document tray glass 2, disposing the focusing unit 10 somewhat below the side of the drum 8, and disposing destaticizer 9" and primary charger 9 between cleaner 22 and focusing unit 10.
COPYRIGHT: (C)1979,JPO&Japio
JP102978A 1978-01-09 1978-01-09 Optical device for copying machine Pending JPS5494323A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP102978A JPS5494323A (en) 1978-01-09 1978-01-09 Optical device for copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP102978A JPS5494323A (en) 1978-01-09 1978-01-09 Optical device for copying machine

Publications (1)

Publication Number Publication Date
JPS5494323A true JPS5494323A (en) 1979-07-26

Family

ID=11490127

Family Applications (1)

Application Number Title Priority Date Filing Date
JP102978A Pending JPS5494323A (en) 1978-01-09 1978-01-09 Optical device for copying machine

Country Status (1)

Country Link
JP (1) JPS5494323A (en)

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