Patent · US Active

Drop centering device

US7649692B2 · kind B2 · utility

2Cited by

3References

15Claims

0Family size

Assignee

VARIOPTIC S.A. · FR

Inventor

Bruno Berge · Val-de-Reuil, FR

Key dates

Filing date	Aug 15, 2008
Grant date	Jan 19, 2010
Priority date	—
Expiry date	Aug 15, 2028

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01L3/0244
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A variable-focus lens that includes a wall made of an insulating material, a drop of an insulating liquid arranged on an area of a first surface of the wall, a conductive liquid covering the first surface and the drop, and an electrode arranged on a second surface of said wall. The insulating and conductive liquids are non-miscible, having different optical indexes and substantially the same density. The drop of the variable-focus lens is centered in a truncated cone centered on an axis perpendicular to the first surface, the bottom of which is pierced with a centered hole, and the insulating material wall is transparent and covers the hole.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.