Optical: systems and elements – Optical modulator – Light wave directional modulation
Reexamination Certificate
2006-03-28
2006-03-28
Mack, Ricky L. (Department: 2873)
Optical: systems and elements
Optical modulator
Light wave directional modulation
C359S315000, C359S245000, C359S642000
Reexamination Certificate
active
07019890
ABSTRACT:
An electro-active lens is disclosed. The lens includes at least one electro-active cell to provide a lens having at least two focal lengths, the electro-active cell capable of adjusting its focal length based on voltages applied to the electro-active cell. The voltage is supplied by an alternating current source, including a flying capacitor circuit. The electro-active lenses reduce birefringence through the use of a single cholesteric liquid crystal electro-active cell.
REFERENCES:
patent: 4795248 (1989-01-01), Okada et al.
patent: 5424927 (1995-06-01), Schaller et al.
patent: 6191881 (2001-02-01), Tajima
patent: 6191882 (2001-02-01), Gelbart
Kippelen Bernard
Mathine David
Meredith Gerald
E-Vision LLC
Hunton & Williams LLP
Mack Ricky L.
Thomas Brandi N.
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