JPS55138737A - Oscillating mirror lighting device - Google Patents

Oscillating mirror lighting device

Info

Publication number
JPS55138737A
JPS55138737A JP4672779A JP4672779A JPS55138737A JP S55138737 A JPS55138737 A JP S55138737A JP 4672779 A JP4672779 A JP 4672779A JP 4672779 A JP4672779 A JP 4672779A JP S55138737 A JPS55138737 A JP S55138737A
Authority
JP
Japan
Prior art keywords
mirrors
original surface
luminous fluxes
line positions
oscillating
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
JP4672779A
Other languages
Japanese (ja)
Inventor
Junichi Kitabayashi
Ikuo Maeda
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 JP4672779A priority Critical patent/JPS55138737A/en
Publication of JPS55138737A publication Critical patent/JPS55138737A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain less illuminance unevenness and bright slit exposure by using two oscillating mirrors and so rotating the same that the two luminous fluxes produced on account of vignetting of lense scan while overlapping on the original platen.
CONSTITUTION: The luminous flux emitted from a main lighting system 3 is focused on the original surface 5 by way of oscillating mirrors 4, 4'. When the oscillating mirrors 4, 4' are placed in the solid line positions respectively, the bisected respective luminous fluxes are reflected by the mirrors 4, 4' and focus at one point S1 on the original surface 5, but when they are in the dotted line positions where the mirrors are rotated in the clockwise and counterclockwise directions respectively, it turns out that the luminous fluxes focus as the S2, S2' or S3, S3' points respectively near the original surface. Hence, if the two plane mirrors 4, 4' are disposed in the solid line positions and the plane mirrors 4, 4' are rotated associatedly in such a manner that the both luminous fluxes scan while overalapping on the original surface 5, there is no more dark part in the slit central part owing to vignetting of lens, hence the bright slit exposure of less illuminance unevenness may be obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP4672779A 1979-04-18 1979-04-18 Oscillating mirror lighting device Pending JPS55138737A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4672779A JPS55138737A (en) 1979-04-18 1979-04-18 Oscillating mirror lighting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4672779A JPS55138737A (en) 1979-04-18 1979-04-18 Oscillating mirror lighting device

Publications (1)

Publication Number Publication Date
JPS55138737A true JPS55138737A (en) 1980-10-29

Family

ID=12755363

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4672779A Pending JPS55138737A (en) 1979-04-18 1979-04-18 Oscillating mirror lighting device

Country Status (1)

Country Link
JP (1) JPS55138737A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH035570B2 (en) * 1981-03-30 1991-01-25 Fuji Xerox Co Ltd
US20140072088A1 (en) * 2012-09-11 2014-03-13 Ge-Hitachi Nuclear Energy Americas Llc Method and system for external alternate suppression pool cooling for a bwr

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH035570B2 (en) * 1981-03-30 1991-01-25 Fuji Xerox Co Ltd
US20140072088A1 (en) * 2012-09-11 2014-03-13 Ge-Hitachi Nuclear Energy Americas Llc Method and system for external alternate suppression pool cooling for a bwr
US10395784B2 (en) * 2012-09-11 2019-08-27 Ge-Hitachi Nuclear Energy Americas Llc Method and system for external alternate suppression pool cooling for a BWR

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