Light energy control system and method of operation

Details Light energy control system and method of operation Light energy control system and method of operation

1989-12-21

1992-03-31

Gellner, Michael L.

Photocopying

Contact printing

Light boxes

346160, 355 71, 359230, 359276, 359291, 359292, G03B 2752

Patent

active

051012367

ABSTRACT:
There is disclosed a light energy management system for use in conjunction with, in one embodiment, the exposure unit of a xerographic reproduction system. The light management system serves to funnel the unmodulated light for proper impact on a modulating device and to maintain the dark effect of the device when in the unmodulated mode. Light baffles are used for this purpose, some of which are formed as a series of angular steps designed to eliminate unwanted light along the longitudinal axis of the modulated light path. The angular step, in one embodiment, takes the shape of a semi-circular bee thorax. The modulated light path includes a light focus lens and a pair of mirrors for sending the modulated light pulses to the reproduction process surface.

REFERENCES:
patent: 4571603 (1986-02-01), Hornbeck et al.
patent: 4596992 (1986-06-01), Hornbeck
patent: 4662746 (1987-05-01), Hornbeck
patent: 4698602 (1987-10-01), Armitage
patent: 4728185 (1988-03-01), Thomas
patent: 4805012 (1989-02-01), Agostinelli et al.

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