JPS64909A - Optical device in image forming device - Google Patents

Optical device in image forming device

Info

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
Application number
JP62155497A
Other languages
Japanese (ja)
Other versions
JPH01909A (en
Inventor
Toshiharu Takahashi
Kazuhiko Kikuchi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP62-155497A priority Critical patent/JPH01909A/en
Priority claimed from JP62-155497A external-priority patent/JPH01909A/en
Publication of JPS64909A publication Critical patent/JPS64909A/en
Publication of JPH01909A publication Critical patent/JPH01909A/en
Pending legal-status Critical Current

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
JP62-155497A 1987-06-24 Optical device in image forming apparatus Pending JPH01909A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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