High resolution laser printer

Details High resolution laser printer High resolution laser printer

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.

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