Light filtering apparatus

Details Light filtering apparatus Light filtering apparatus

2007-08-21

2007-08-21

Mack, Ricky (Department: 2873)

Optical: systems and elements

Light dispersion

C359S634000, C356S330000

Reexamination Certificate

active

10991171

ABSTRACT:
A light filtering apparatus includes a first dispersion device, a spatial filter and a second dispersion device. The first dispersion device is arranged to cause spatial dispersion of an incident light beam as a function of its frequency. The spatial filter is arranged to filter the dispersed light beam so as to produce a spatially filtered resultant beam. The second dispersion device is arranged to recombine the dispersed and filtered light beam so as to produce an output light beam having a substantially similar spectrum at any position within the output beam cross-section.

REFERENCES:
patent: 6392748 (2002-05-01), Fateley
patent: 6735362 (2004-05-01), Soskind
patent: 6859275 (2005-02-01), Fateley et al.
patent: 2005/0046839 (2005-03-01), Harnisch

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