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RETROREFLECTOR TO MINIMIZE INTERFERENCE EFFECTS IN LAYERED PHOTORECEPTORS

IP.com Disclosure Number: IPCOM000026239D
Original Publication Date: 1990-Dec-31
Included in the Prior Art Database: 2004-Apr-05

Publishing Venue

Xerox Disclosure Journal

Abstract

Under coherent illumination, a layered photoreceptor exhibits a problem called plywooding due to interference from reflections of the laser beam within the layers. The interference appears in prints as random patterns of light and dark fringes over regions which should have uniform reflectance. The effect arises from variations in the thickness of the amount of light reflected at the photoreceptor surface and hence transmitted to the generator layer. Proposed is a method to even out the light absorbed in the generator layer by sending the reflected beam back in.