Polygon signature correction

Details Polygon signature correction Polygon signature correction

1984-05-29

1986-11-11

Groody, James J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358280, 358288, 350484, 250235, H04N 140, H04N 117

Patent

active

046225935

ABSTRACT:
A circuit for correcting the data rate to compensate for polygon facet irregularities in a flying spot scanner is described. A crystal controlled oscillator is used to generate the system clock. As each facet becomes the current facet, a number of pulses appropriate for that facet are subtracted from the bit clock stream so that there will always be a constant ratio between data speed and scan speed regardless of the scan speed variations between individual facets.

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patent: 4404596 (1983-09-01), Jurgensen et al.
"Correcting Method for Light Scanning Error of Rotating Polygon Mirror", IECE-Denshi Tsushin Gakkai of Japan, vol. J66, No. 2, Tadashi Matsuda et al.
"A Correction Method for Laser Scanning Errors in High Speed Laser Printers", Fujitsu Sci. and Tech., vol. 18, No. 4, pp. 579-594, Tomohisa Mikami et al.

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