Recorders – Printing – dotting – or punching marker – Ink transfer support or moving means
Patent
1984-11-26
1986-09-23
Evans, A.
Recorders
Printing, dotting, or punching marker
Ink transfer support or moving means
346108, 358293, 350 68, 354 4, G01D 1514
Patent
active
046138773
ABSTRACT:
A high resolution laser printer utilizes a first cylindrical lens to focus a laser beam in the sagittal direction prior to the facets of a rotating polygon. The light reflected from the polygon is focused in the horizontal direction at the photoconductor drum of an electrophotographic process by a scan lens assembly. Following the scan lens assembly, there is a second cylindrical lens which also focuses the laser beam in the horizontal direction at the photoconductor. The first and second cylindrical lenses are positioned to eliminate errors in the facets of the polygon. Scan velocity deviations resulting from the optical design are corrected by storing correction information in a memory and using this information to vary the rate at which the laser is modulated with data.
REFERENCES:
patent: 4270131 (1981-05-01), Tompkins et al.
patent: 4410234 (1983-10-01), Mikami et al.
Balchunas Theodore G.
Goldstein Amnon
Grey David
Kaplan Arthur B.
Spencer David R.
Data Recording Systems, Inc.
Evans A.
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