High efficiency symmetrical scanning optics

Details High efficiency symmetrical scanning optics High efficiency symmetrical scanning optics

G - Physics

02

B

88/96.8

G02B 5/09 (2006.01)

Patent

CA 1143971

D/773441 ABSTRACT OF THE DISCLOSURE To provide a relatively compact and linear underfilled multi- faceted rotating polygon beam scanning system, there are imaging optics for bringing a input light beam to a tangentially extending line-like focus on suc- cessive facets of a rotating polygonal scanning element and for restoring the light beam reflected from the facets to a generally circular focus on an image plane. Each of the facets subtends a sufficient angle about the axis of rotation of the scanner to ensure that the input beam remains fully seated on a single facet while the reflected beam is being scanned through a desired scan angle. Furthermore, improved linearity is achieved because the scan- ning system is symmetrical in the tangential and sagittal planes at all points between the imaging optics and the polygonal scanning element.

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