Scanner optics with no cross scan field curvature

Details Scanner optics with no cross scan field curvature Scanner optics with no cross scan field curvature

G - Physics

02

B

314/28, 88/96.8

G02B 27/00 (2006.01) G02B 26/12 (2006.01) H04N 1/113 (2006.01)

Patent

CA 1247898

ABSTRACT A lens system is described which allows a scan spot in a flying spot scanning system on the image surface to be focused in the cross scan plane and at the same time correcting field curvature distortion. The use of a first lens element having negative power in the scan direction and a second lens element having positive power in the cross scan plane on the front surface and positive power in scan plane on the rear surface allows a light from a laser to be reflected from a rotating polygon to be reflected from a concave cylindrical mirror onto a xerographic or other photosensitive surface.

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