JPS55138737A - Oscillating mirror lighting device - Google Patents
Oscillating mirror lighting deviceInfo
- 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
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
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)
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 |
-
1979
- 1979-04-18 JP JP4672779A patent/JPS55138737A/en active Pending
Cited By (3)
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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