Lens with variable focus
AssigneeUniversite Joseph Fourier
InventorsBruno Berge, Jerome Peseux
Life of this patent
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Abstract
A variable focus lens comprising a chamber (12) filled with a first liquid (13), a drop of a second liquid (11) being disposed at rest on a region of a first surface of an insulating wall of the chamber, the first and second liquids being non miscible, of different optical indexes and of substantially same density. The first liquid is conductive and the second liquid is insulating. The lens further comprises means for applying a voltage between the conductor liquid and an electrode (16) placed on the second surface of said wall; and centering means for maintaining the centering of the edge of the drop while the voltage is applied and for controlling the shape thereof.
Claims9
A variable focus lens comprising a chamber (12) filled with a first liquid (13), a drop of a second liquid (11) being disposed at rest on a region of a first surface of an insulating wall of the chamber, the first and second liquids being non miscible, of different optical indexes and of substantially same density, characterized in that:
- the first liquid is conductive;
- the second liquid is insulating;
- in that it comprises:
- means for applying a voltage between the conductor liquid and an electrode (16;
- 26;
- 35-37;
- 75-79) placed on the second surface of said wall;
- and
- centering means for maintaining the centering of the edge of the drop while the voltage is applied and for controlling the shape thereof.
Dependencies are inferred from the claim text.