B - Operations – Transporting – 41 – L
Patent
B - Operations, Transporting
41
L
178/3
B41L 19/00 (2006.01) G06K 15/12 (2006.01) H04N 1/053 (2006.01) H04N 1/113 (2006.01) H04N 1/12 (2006.01)
Patent
CA 1186237
ABSTRACT 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 photo- detection 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.
414617
Fetherstonhaugh & Co.
Sperry Corporation
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