Controllable optical lens
AssigneeKoninklijke Philips Electronics N.V.
InventorsAlbert H. J. Immink, Bernardus H. W. Hendriks, Stein Kuiper, Ivon F. Helwegen, Marco A. J. Van As
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Abstract
A controllable optical lens system, comprises a chamber housing first and second fluids, the interface between the fluids defining a lens surface. An electrode arrangement controls the shape of the lens surface and has first and second electrodes. A parameter is determined by the system dependent on the electrical resistance through at least one of the lens fluids between the first and second electrodes. Thus, the series resistance through a lens fluid is used as a measure of meniscus position.
Claims23
A controllable optical lens system, comprising:
- a chamber housing first (10) and second (12) fluids, the interface between the fluids defining a lens surface;
- an electrode arrangement for electrically controlling the shape of the lens surface, the electrode arrangement comprising first (14) and second (16) electrodes;
- means for measuring the electrical resistance (REW) through at least one of the lens fluids (10) between the first and second electrodes;
- and
- means for determining the meniscus position of the lens in dependence upon the measured electrical resistance (REW).
A method of sensing the lens position of a controllable optical lens, the lens comprising a chamber housing first and second liquids (10,12), the interface between the liquids defining a lens surface and an electrode arrangement (14,16) for electrically controlling the shape of the lens surface, the electrode arrangement comprising first and second electrodes (14,16), wherein the method comprises:
- means for measuring the electrical resistance (REW) through at least one of the lens fluids (10) between the first and second electrodes;
- and
- using the measured electrical resistance (REW) to determine the meniscus position of the lens.
Dependencies are inferred from the claim text.