Optical: systems and elements – Lens – Fluid
Reexamination Certificate
2011-07-19
2011-07-19
Martinez, Joseph (Department: 2873)
Optical: systems and elements
Lens
Fluid
C359S666000, C359S667000
Reexamination Certificate
active
07982963
ABSTRACT:
The present invention discloses an optical device comprising a container enclosing an insulating liquid (A) and a liquid responsive to an electric field (B), the insulating liquid (A) and the liquid responsive to an electric field (B) being immiscible and being in contact with each other via an interface (14), at least one of the liquids (A; B) being at least partially placed in a light path through the container. The optical device further comprises an electrode arrangement (2; 12) for controlling the shape of the interface (14) by means of a voltage; and means (100) for preventing the interface from an exposure to an external electric field. Consequently, the build-up of electrostatic charge on a surface of the optical device is avoided, which prevents the unwanted distortion of the interface (14) caused by the interaction of the liquid responsive to an electric field (B) and the electrostatic charge.
REFERENCES:
patent: 5373102 (1994-12-01), Ehrlich et al.
patent: 6369954 (2002-04-01), Berge et al.
patent: 2001/0017985 (2001-08-01), Tsuboi et al.
patent: 0713240 (1996-05-01), None
patent: 03069380 (2003-08-01), None
patent: 2004102250 (2004-11-01), None
Hendriks Bernardus Hendrikus Wilhelmus
Kuiper Stein
Koninklijke Philips Electronics , N.V.
Martinez Joseph
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