Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Patent
1994-12-09
1998-06-02
Le, N.
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
347116, 25022728, 250235, B41J 247, B41J 2435, G11B 700, G11B 708
Patent
active
057608156
ABSTRACT:
A fiber optic detection system is used in a color reproduction device to generate color image registration signals. In one embodiment a retroreflector is positioned beneath the photoreceptor belt, the retroreflector being periodically visible through holes formed in a non-image area of the belt. An optical fiber directs flux from a light source onto the photoreceptor belt and periodically illuminates the retroreflector. Light is preferentially reflected back into the fiber with a portion being coupled to a photosensor to provide a signal used for registration purposes. In another embodiment, a plurality of optical fibers are bundled together to form a trunk at the belt illumination end with two branches functioning as the light input and detecting ends. In a still further embodiment, retroreflective marks are formed directly on the surface of a photoreceptor; the several fiber optic embodiments are used to detect the formed marks.
REFERENCES:
patent: 4071754 (1978-01-01), Roulund
patent: 5175570 (1992-12-01), Haneda et al.
Gordon Raquel Yvette
Le N.
Xerox Corporation
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