Method of reducing average data rate in rotating mirror laser re

Details Method of reducing average data rate in rotating mirror laser re Method of reducing average data rate in rotating mirror laser re

1988-08-25

1990-02-06

Reynolds, Bruce A.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

358302, 358481, 350 67, 346 76L, G01D 942, G02B 2608, H04N 123

Patent

active

048991767

ABSTRACT:
A laser printer records an image on a medium as a function of digital data which is received at an input data rate. A laser beam is used for recording pixels of the image on the medium while the medium is advanced in a longitudinal direction at a controlled uniform rate. The pixels are recorded by scanning the beam across the medium in a transverse direction, at a scan velocity, using a multifaceted, rotating mirror which reflects the beam onto the medium. The scan velocity is proportional to the angular velocity of the rotating mirror. Beam intensity is modulated as a function of the input digital data. In order for the average data rate of recording to be compatible with the input data rate while maintaining a high instantaneous scan velocity, the beam is scanned across the medium by only one of every N-facets of the rotating mirror.

REFERENCES:
patent: 4583128 (1986-04-01), Anderson, Jr. et al.

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