Optical: systems and elements – Lens – Fluid
Reexamination Certificate
2007-06-12
2007-06-12
Lester, Evelyn A. (Department: 2873)
Optical: systems and elements
Lens
Fluid
C359S666000, C359S832000, C359S245000, C359S676000, C359S683000
Reexamination Certificate
active
10531975
ABSTRACT:
A zoom lens comprising, from the object side to the image side, a front lens group (72), a controllable lens group, and a rear lens group (74), the controllable lens group comprising a voltage-controlled electrowetting device, which device contains a first fluid (A) and a second fluid (B) having different refractive indices, with at least two first fluid-second fluid interfaces (40,42). The curvatures, and thus the lens power, of these interfaces can be changed independently by supplying a voltage (V1, V2) to electrodes (22,32) of the device, so that no mechanical movement of lens elements is needed.
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Hendriks Bernardus Hendrikus Wilhelmus
Kuiper Stein
Ophey Willem Gerard
Snoeren Rudolph Maria
Im Paul
Koninklijke Philips Electronics , N.V.
Lester Evelyn A.
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