JPS64909A - Optical device in image forming device - Google Patents
Optical device in image forming deviceInfo
- Publication number
- JPS64909A JPS64909A JP62155497A JP15549787A JPS64909A JP S64909 A JPS64909 A JP S64909A JP 62155497 A JP62155497 A JP 62155497A JP 15549787 A JP15549787 A JP 15549787A JP S64909 A JPS64909 A JP S64909A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- laser beams
- passed
- image
- laser beam
- 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 eliminate the fluctuation in the distortion over the entire part of an image and to improve image quality by unifying the characteristics of the distortions among plural laser beams to the same direction thereby minimizing the deviations in the images among the respective laser beams.
CONSTITUTION: The 1st laser beam 18a is reflected by the surface of a polygonal mirror 21 and is then passed through a 1st lens 24 from which the beam is inverted and deflected by mirrors 28, 30 and is passed through a 2nd lens 26 so as to be projected to a photosensitive body 23. On the other hand, the 2nd laser beam 20a is reflected by the surface of the polygonal mirror 21 and is then passed through the 1st lens 24 in the optical path symmetrical with the optical path of the 1st laser beam 18a. The beam is then inverted and deflected by a 3rd mirror 31 and is imaged by a 3rd lens 27 so as to be projected onto the photosensitive body 23. The laser beams in the arbitrary directions are directionally changed in such a manner to unify the characteristics of the distortions of the laser beams to the same direction, by which the functuation in the distortion over the entire part of the image is eliminated and the image quality is improved.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62-155497A JPH01909A (en) | 1987-06-24 | Optical device in image forming apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62-155497A JPH01909A (en) | 1987-06-24 | Optical device in image forming apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS64909A true JPS64909A (en) | 1989-01-05 |
JPH01909A JPH01909A (en) | 1989-01-05 |
Family
ID=
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5157533A (en) * | 1990-02-26 | 1992-10-20 | Minolta Camera Co., Ltd. | Multi-beam optical system |
US5218413A (en) * | 1991-07-31 | 1993-06-08 | Minolta Camera Kabushiki Kaisha | Optical device for image forming apparatus |
JP2000155279A (en) * | 1998-11-19 | 2000-06-06 | Canon Inc | Scanning optical system and image forming device |
JP2005288825A (en) * | 2004-03-31 | 2005-10-20 | Sharp Corp | Light beam scanning device and image forming apparatus |
WO2006014023A1 (en) * | 2004-08-05 | 2006-02-09 | Canon Kabushiki Kaisha | Optical scanning device |
JP2007010868A (en) * | 2005-06-29 | 2007-01-18 | Ricoh Co Ltd | Optical scanner and image forming apparatus |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5157533A (en) * | 1990-02-26 | 1992-10-20 | Minolta Camera Co., Ltd. | Multi-beam optical system |
US5218413A (en) * | 1991-07-31 | 1993-06-08 | Minolta Camera Kabushiki Kaisha | Optical device for image forming apparatus |
JP2000155279A (en) * | 1998-11-19 | 2000-06-06 | Canon Inc | Scanning optical system and image forming device |
JP2005288825A (en) * | 2004-03-31 | 2005-10-20 | Sharp Corp | Light beam scanning device and image forming apparatus |
WO2006014023A1 (en) * | 2004-08-05 | 2006-02-09 | Canon Kabushiki Kaisha | Optical scanning device |
JP2006072339A (en) * | 2004-08-05 | 2006-03-16 | Canon Inc | Optical scanning device |
US7355771B2 (en) | 2004-08-05 | 2008-04-08 | Canon Kabushiki Kaisha | Optical scanning apparatus |
JP2007010868A (en) * | 2005-06-29 | 2007-01-18 | Ricoh Co Ltd | Optical scanner and image forming apparatus |
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