Optical: systems and elements – Optical modulator – Light wave temporal modulation
Reexamination Certificate
2006-05-09
2006-05-09
Sugarman, Scott J. (Department: 2873)
Optical: systems and elements
Optical modulator
Light wave temporal modulation
C349S016000
Reexamination Certificate
active
07042617
ABSTRACT:
Optical devices utilizing flakes (also called platelets) suspended in a host fluid have optical characteristics, such as reflective properties, which are angular dependent in response to an AC field. The reflectivity may be Bragg-like, and the characteristics are obtained through the use of flakes of liquid crystal material, such as polymer liquid crystal (PLC) materials including polymer cholesteric liquid crystal (PCLC) and polymer nematic liquid crystal (PNLC) material or birefringent polymers (BP). The host fluid may be propylene carbonate, poly(ethylene glycol) or other fluids or fluid mixtures having fluid conductivity to support conductivity in the flake/host system. AC field dependent rotation of 90° can be obtained at rates and field intensities dependent upon the frequency and magnitude of the AC field. The devices are useful in providing displays, polarizers, filters, spatial light modulators and wherever switchable polarizing, reflecting, and transmission properties are desired.
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Jacobs Stephen D.
Kosc Tanya Z.
Marshall Kenneth L.
Hanig Richard
Lukacher Kenneth J.
Lukacher Martin
Sugarman Scott J.
The University of Rochester
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