Title:
【発明の名称】ラスタ出力スキャナビートの除去方法および装置
Document Type and Number:
Japanese Patent JP3316010
Kind Code:
B2
Abstract:
A method and apparatus which eliminates beat like artifacts that occur when an RF signal is mixed with a pulsed signal of similar, but not identical, frequency to the RF signal. A controller for synchronizing the phase of a RF carrier signal to a video signal provides beat elimination in a high pixel rate laser printer. The video signal and RF carrier signal are multiplied and sent to an acousto-optic modulator for pulsing a uniform burst of energy in the form of a laser beam to a photoconductor. The controller may include a synchronous gateable crystal oscillator with logic such as TTL, CMOS, ECL or equivalent logic functions using discrete transistors, where the synchronous gateable crystal oscillator is frequency dependent upon a laser printing speed. Eliminating imaging defects such as variable pixel width and density provides a sharper, uniform pixel printout.
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Inventors:
Michael Esthioshi
Robert peel
Jean Michael Geerin
Aaron Nakman
Robert peel
Jean Michael Geerin
Aaron Nakman
Application Number:
JP31040292A
Publication Date:
August 19, 2002
Filing Date:
November 19, 1992
Export Citation:
Assignee:
Xerox Corporation
International Classes:
H04N5/76; B41J2/44; H01S5/068; H04N1/40; (IPC1-7): B41J2/44; H04N5/76
Attorney, Agent or Firm:
Minoru Nakamura (6 outside)