Efficient LED light geometry for optical printers

Details Efficient LED light geometry for optical printers Efficient LED light geometry for optical printers

1995-12-19

1999-10-19

Wong, Peter S.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

B41J 247

Patent

active

059697474

ABSTRACT:
A light source is disclosed for use an optical printer illuminating a spatial light modulator to efficiently and uniformly project light onto a photosensitive medium while providing a simpler design of the spatial light modulator in the optical printer. The light source uses light emitting diodes opposed across a light pipe. The light from the light emitting diodes propagates in the light pipe until striking a redirection structure which redirects the light out of lateral surface of the light pipe.

REFERENCES:
patent: 4714983 (1987-12-01), Lang
patent: 5381309 (1995-01-01), Borchardt
patent: 5420761 (1995-05-01), DuNah et al.

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