US Patent 7545547 Scanning unit and image forming apparatus

Patent 7545547 was granted and assigned to RICOH COMPANY,LTD. on June, 2009 by the United States Patent and Trademark Office.

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Patent Inventor Names

Daisuke Ichii0

Naoto Watanabe0

Nobuaki Kubo0

Yoshinori Hayashi0

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Patent abstract

A scanning optical system leads the light fluxes deflected by the polygon mirror to a photosensitive drum. An absolute value of a lateral magnification in a main scanning direction is larger than an absolute value of a lateral magnification in a sub-scanning direction. Moreover, a beam diameter in the sub-scanning direction on a surface of the photosensitive drum is equal to or smaller than a beam diameter in the main scanning direction and larger than a scan line interval.

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Official Website

https://pdfpiw.uspto.gov/.piw?Docid=075455470

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