Plywood suppression in ROS systems

Details Plywood suppression in ROS systems Plywood suppression in ROS systems

1991-07-26

1992-02-18

Ben, Loha

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359216, 359618, 250236, 2505781, 346108, G02B 2608

Patent

active

050899082

ABSTRACT:
A multiple diode laser array used in a ROS scanning system is modified to reduce the effects of undesirable spatial exposure variation at the surface of certain type of layered, semi-transparent photoreceptors. The spatial absorption variation is later manifested as a "plywooding" pattern formed on output prints derived from the exposed photoreceptor. The laser array is modified to form a merged scanning beam at the photoreceptor surface of two or more diode outputs, each output operating at a different wavelength than the other. In one embodiment, a plurality of diodes, each at a different wavelength, are sequentially addressed, and an image of each diode is scanned across the photoreceptor which results in an exposure distribution that would be similar to that formed by an incoherent beam.

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