Variable focal lens
First Claim
Patent Images
1. A variable focus lens having an optical axis, comprising:
- a housing that defines a chamber for containing a conductive liquid and an insulating liquid, the two fluids having different refractive indices and contacting one another to form a surface of contact that comprises a deformable refractive surface having a periphery that is caused to move along the wall of the housing as a function of an applied electric voltage (V), wherein the housing comprises;
an upper wall portion inclined at first angle relative to a plane perpendicular to the optical axis (Δ
) of the lens;
a lower wall portion inclined at a second angle relative to said plane, wherein the second angle is greater than the first angle;
a junction zone (B′
) between the upper and lower wall portions, wherein the surface of the housing at the junction zone presents a variation in wall inclination relative to the plane perpendicular to the optical axis of the lens sufficient to substantially block movement of the deformable refractive surface at said junction zone upon an incremental increase in applied voltage.
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Abstract
A variable focus lens comprises a chamber containing a conductive liquid (5) and an insulating liquid (4) of different refractive indices, the surface of contact between the two liquids forming a deformable refractive surface (6) whose periphery is caused to move along the walls of a housing under the effect of an electric voltage (V). The housing comprises an upper portion (16) inclined relative to a plane perpendicular to the optical axis (Δ) of the lens, a lower portion (34, 48, 52) more inclined than the upper portion and a zone of junction (B′) between the upper and lower portions, playing the role of a stop for the deformable refractive interface.
62 Citations
13 Claims
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1. A variable focus lens having an optical axis, comprising:
- a housing that defines a chamber for containing a conductive liquid and an insulating liquid, the two fluids having different refractive indices and contacting one another to form a surface of contact that comprises a deformable refractive surface having a periphery that is caused to move along the wall of the housing as a function of an applied electric voltage (V), wherein the housing comprises;
an upper wall portion inclined at first angle relative to a plane perpendicular to the optical axis (Δ
) of the lens;a lower wall portion inclined at a second angle relative to said plane, wherein the second angle is greater than the first angle; a junction zone (B′
) between the upper and lower wall portions, wherein the surface of the housing at the junction zone presents a variation in wall inclination relative to the plane perpendicular to the optical axis of the lens sufficient to substantially block movement of the deformable refractive surface at said junction zone upon an incremental increase in applied voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- a housing that defines a chamber for containing a conductive liquid and an insulating liquid, the two fluids having different refractive indices and contacting one another to form a surface of contact that comprises a deformable refractive surface having a periphery that is caused to move along the wall of the housing as a function of an applied electric voltage (V), wherein the housing comprises;
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13. A variable focus lens having an optical axis, comprising:
- a housing that defines a chamber for containing a conductive liquid and an insulating liquid, the two fluids having different refractive indices and contacting one another to form a surface of contact that comprises a deformable refractive surface having a periphery that is caused to move along the wall of the housing as a function of an applied electric voltage (V), wherein the housing comprises;
a light-exit wall oriented at least essentially perpendicular to the optical axis; a first side wall portion having a first orientation relative to a plane perpendicular to the optical axis (Δ
) of the lens;a second side wall portion, adjacent to said light-exit wall, having a second orientation relative to said plane; a junction zone (B′
) between the first and second side wall portions, wherein the surface of the housing at the junction zone presents a variation in a wall characteristic sufficient to substantially block movement of the deformable refractive surface at said junction zone upon an incremental increase in applied voltage.
- a housing that defines a chamber for containing a conductive liquid and an insulating liquid, the two fluids having different refractive indices and contacting one another to form a surface of contact that comprises a deformable refractive surface having a periphery that is caused to move along the wall of the housing as a function of an applied electric voltage (V), wherein the housing comprises;
Specification