Bow-free telecentric optical system for multiple beam...

Details Bow-free telecentric optical system for multiple beam... Bow-free telecentric optical system for multiple beam...

2005-12-07

2008-12-16

Meier, Stephen D (Department: 2853)

Incremental printing of symbolic information

Light or beam marking apparatus or processes

C347S241000, C359S215100, C359S217200, C359S362000, C359S741000

Reexamination Certificate

active

07466331

ABSTRACT:
A multiple beam scanning system for scanning light beams onto a photoreceptor of an image forming apparatus. A pre-polygon input and output telecentric optical subsystem includes a beam conditioning system that focuses the light beams in a cross-scan direction, collimates the beams in the scan direction, and individually focuses the beams on a polygonal mirror deflector, which reflects the beams along a first scan path. A post-polygon input and output telecentric optical subsystem redirects the scanned beams along a second scan path and through an output window onto the photoreceptor, wherein the post-polygon subsystem includes a positive cross-scan cylindrical first optical element, a negative cross-scan cylindrical second optical element, and a positive cross-scan cylindrical third optical element. In one embodiment, the three cylindrical optical elements are cylinder mirrors. In another embodiment, one or more of the optical elements are cylinder lenses.

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