US Patent 7755822 Multibeam optical scanning device and image forming apparatus
Patent 7755822 was granted and assigned to RICOH COMPANY,LTD. on July, 2010 by the United States Patent and Trademark Office.
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Patent abstract
A multibeam optical scanning device includes a plurality of light sources; a collimating lens; an aperture; a cylinder lens; a light deflecting unit; a scanning optical system; and a phase adjusting element. The phase adjusting element performs phase adjustments of wavefronts of the light beams to expand a depth allowance without substantially increasing a beam spot size of each of the beam spots on the scanning surface.
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US Patent 07755822 Multibeam optical scanning device and image forming apparatus US Patent 7755822 Multibeam optical scanning device and image forming apparatus
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Patent Number
0775582200
Patent Number
775582200
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Official Website
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Infobox
Is a
Current Assignee
0
Patent Jurisdiction
Patent Number
077558220
Date of Patent
July 13, 2010
0Patent Application Number
122084790
Date Filed
September 11, 2008
0Official Website
Patent Primary Examiner
Edits on 25 Sep, 2022
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Infobox
Is a
Current Assignee
0
Patent Jurisdiction
Patent Number
077558220
Date of Patent
July 13, 2010
0Patent Application Number
122084790
Date Filed
September 11, 2008
0Official Website
Patent Primary Examiner
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US Patent 07755822 Multibeam optical scanning device and image forming apparatus
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
07755822
Date of patent
July 13, 2010
Patent application number
12208479
Date Filed
September 11, 2008
Patent primary examiner
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