JPS55115057A - Lighting device of electrophotographic copier - Google Patents

Lighting device of electrophotographic copier

Info

Publication number
JPS55115057A
JPS55115057A JP2268379A JP2268379A JPS55115057A JP S55115057 A JPS55115057 A JP S55115057A JP 2268379 A JP2268379 A JP 2268379A JP 2268379 A JP2268379 A JP 2268379A JP S55115057 A JPS55115057 A JP S55115057A
Authority
JP
Japan
Prior art keywords
reflector
revolution
light source
scanning
plane mirror
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
JP2268379A
Other languages
Japanese (ja)
Inventor
Toyokazu Satomi
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 JP2268379A priority Critical patent/JPS55115057A/en
Publication of JPS55115057A publication Critical patent/JPS55115057A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To improve high speed copying characteristic without impairing lighting efficiency by using plane mirrors and cylindrical guadratic surface mirrors.
CONSTITUTION: The light source part consisting of a spot or linear light source 4 and a reflector 5 having a quadratic surface of revolution such as paraboloid of revolution or ellipsoidal surface is fixedly disposed below the portion near an original rest glass plate 2. Below this are disposed a plane mirror 6 and a reflector 7 having a quadratic surface of revolution such as paraboloid of revolution or ellipsoidal surface. The plane mirror 6 and reflector 7 are made movable respectively from the scanning start position up to the scanning end position while being turned in the arrow C, D directions. As a result of this, the lighting light from the light source part is condensed on the original surface while being reflected by the plane mirror 6 and reflector 7 and lights and scans from the focus point E up to F in synchronization with the exposure scanning by the lens 3. Hence, the scanning movement distance of the reflecting mirror 6 and reflector 7 is reduced without impairment of the lighting efficiency and the high speed copying characteristic improves.
COPYRIGHT: (C)1980,JPO&Japio
JP2268379A 1979-02-28 1979-02-28 Lighting device of electrophotographic copier Pending JPS55115057A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2268379A JPS55115057A (en) 1979-02-28 1979-02-28 Lighting device of electrophotographic copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2268379A JPS55115057A (en) 1979-02-28 1979-02-28 Lighting device of electrophotographic copier

Publications (1)

Publication Number Publication Date
JPS55115057A true JPS55115057A (en) 1980-09-04

Family

ID=12089654

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2268379A Pending JPS55115057A (en) 1979-02-28 1979-02-28 Lighting device of electrophotographic copier

Country Status (1)

Country Link
JP (1) JPS55115057A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5742058A (en) * 1980-08-27 1982-03-09 Canon Inc Scanning and lighting device
JPH0534840A (en) * 1991-08-01 1993-02-12 Canon Inc Lighting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5742058A (en) * 1980-08-27 1982-03-09 Canon Inc Scanning and lighting device
JPH0534840A (en) * 1991-08-01 1993-02-12 Canon Inc Lighting device

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