Method and apparatus for use and construction of compensated...

Details Method and apparatus for use and construction of compensated... Method and apparatus for use and construction of compensated...

2005-08-23

2005-08-23

Thompson, Timothy (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C359S245000, C359S246000, C349S117000, C349S102000

Reexamination Certificate

active

06934066

ABSTRACT:
A compensated higher order waveplate is constructed of substrates. In one embodiment, a first substrate is a nλ waveplate and the second substrate is a (n+Δ)λ waveplate. The substrates are oriented so that their principle axes of retardation are orthogonal. nλ is a base retardation of a waveplate and Δλ is an incremental retardation. The incremental retardation produces a desired amount of retardation of a lightwave passing through the compensated higher order waveplate. Retarder material used to produce the base retardation is approximately ½ a desired thickness of the waveplate. Multiple waveplates are combined to produce any of wavelength band specific retarders and multiple non contiguous wavelength band specific retarders.

REFERENCES:
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patent: 5212743 (1993-05-01), Heismann
patent: 6717706 (2004-04-01), Miller et al.
patent: 2001/0014069 (2001-08-01), Vrehen
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patent: 2003/0016445 (2003-01-01), Kelly et al.
patent: 2003/0103171 (2003-06-01), Hall, Jr. et al.
patent: 2004/0095536 (2004-05-01), Yoshida et al.
International Search Report for PCT/US04/09693 dated Nov. 26, 2004.

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