US Patent 7525561 Optical scanner and image forming apparatus
Patent 7525561 was granted and assigned to RICOH COMPANY,LTD. on April, 2009 by the United States Patent and Trademark Office.
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An optical scanner is capable of effectively correcting a difference with respect to the sub-scanning direction between the positions of optical spots for scanning photoconductor drums of a tandem type color image forming apparatus. The optical scanner includes an optical axis adjusting part. The optical axis adjusting part uses a deflecting mirror or a wedge-shaped prism to deflect the optical axis of an optical beam with respect to the sub-scanning direction. As a result, it is possible to accurately correct a resist difference among individual image forming stations and form a high-quality color image without any color displacement.
US Patent 07525561 Optical scanner and image forming apparatus US Patent 7525561 Optical scanner and image forming apparatus
US Patent 07525561 Optical scanner and image forming apparatus
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