Hybrid electro-active lens

Optical: systems and elements – Optical modulator – Light wave directional modulation

Reexamination Certificate

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Details

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

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