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CONTROL OF ROS OUTPUT POWER BY ROTATION OF LASER PLANE OF POLARIZATION

IP.com Disclosure Number: IPCOM000025321D
Original Publication Date: 1984-Aug-31
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal

Abstract

In most Raster Output Scanner (ROS) designs, it is necessary to match the oDtical power of the writing beam to that required by the photoreceptor. This requires some type of optical power control since it is necessary to account for variations in laser output power and scanner to scanner variations in throwhput or transmit-tance of the optical system. In past systems, this control has been accomolished by placing either fixed or variable neutral density filters in the optical beam path or by an adjustment of the beam modulator drive power.