Feedback control for laser discharge system

Details Feedback control for laser discharge system Feedback control for laser discharge system

G - Physics

03

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345/57, 314/7

G03G 15/04 (2006.01) G06K 15/12 (2006.01) H04N 1/053 (2006.01) H04N 1/29 (2006.01) H04N 1/407 (2006.01) H04N 1/113 (2006.01) H04N 1/12 (2006.01)

Patent

CA 1087675

FEEDBACK CONTROL FOR LASER DISCHARGE SYSTEM Abstract of the Disclosure In a xerographic printer wherein an acousto-optic modulator is used to derive a deflected first-order beam of electromagnetic power which raster scans a charged photo- conductor to leave a selectively discharged latent image area bordered by a discharged border area; power contents of said first order beam is maintained constant by adjusting the efficiency of the acousto-optic modulator with a closed loop electrical control system. The efficiency of the acousto-optic modulator is adjusted only when the beam is scanning the discharged border area of the photoconductor. By providing a means which allows the power contents of the first order beam to be constant the quality of copies are significantly improved.

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