Variable color LED optical source

Details Variable color LED optical source Variable color LED optical source

2006-06-16

2009-12-08

O'Shea, Sandra L (Department: 2875)

Illumination

Plural light sources

With modifier

C362S236000, C362S242000, C359S618000, C359S639000

Reexamination Certificate

active

07628509

ABSTRACT:
The variable color LED optical source comprises first, second, and third LEDs, each disposed to generate a linearly polarized optical signal; a first beam splitter cube that is optically coupled to the first and second LEDs; a first half-wave plate that is optically coupled to the first beam splitter cube so that it is capable of rotating the polarization orientation of an optical signal emitted from the first beam splitter cube; a second half-wave plate that is optically coupled to the third LED so that it is capable of rotating the polarization orientation of the third optical signal; and a second beam splitter cube that is optically coupled to the first and second half-wave plates so that the second beam splitter cube is capable of emitting a fourth optical signal.

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patent: 2003/0194189 (2003-10-01), Grothe et al.
patent: 2006/0007406 (2006-01-01), Adkins et al.

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