Printer beam position feedback sensor

A beam feedback synchronization system for optical sweeping systems is disclosed. The system includes a multi-faceted rotating reflection mirror which acts on a collimated light beam such as a laser beam, to cause it to sweep periodically in parallel straight lines across a rotating photoconducting...

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Bibliographic Details
Main Author PHILLIPS; EDWIN R
Format Patent
LanguageEnglish
Published 13.12.1983
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
HANDLING RECORD CARRIERS
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
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Summary:A beam feedback synchronization system for optical sweeping systems is disclosed. The system includes a multi-faceted rotating reflection mirror which acts on a collimated light beam such as a laser beam, to cause it to sweep periodically in parallel straight lines across a rotating photoconducting drum. A circular reflector is positioned at a critical position between the rotating reflection mirror and the rotating photoconducting drum. This circular reflector causes a portion of this light to be split off from the main beam and reflected back upon a photodetection device which is positioned in close proximity to the rotating reflection mirror. The electrical signals from the photodetection device are amplified and modified before being applied as periodic synchronizing feedback signals to the character generator from which the data information is emanating.
Bibliography:Application Number: US19820371757