JPS55115057A - Lighting device of electrophotographic copier - Google Patents
Lighting device of electrophotographic copierInfo
- 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
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
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)
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 |
-
1979
- 1979-02-28 JP JP2268379A patent/JPS55115057A/en active Pending
Cited By (2)
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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