Patent ID: 11860470
Assignee: COOPERVISION INTERNATIONAL LIMITED
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A flexible electrically tunable liquid crystal lens, comprising:
a liquid crystal cell having a cell gap thickness X prior to bending the liquid crystal lens, and a cell gap thickness Y after returning to shape after the bending of the liquid crystal lens, wherein Y=X±10% X,
wherein the liquid crystal cell comprises elastic posts effective in limiting changes in the cell gap thickness to maintain Y=X±10%,
wherein the liquid crystal cell includes first and second alignment layers and a layer of liquid crystal between the first and second alignment layers, and
wherein the first and second alignment layers comprise a flexible polymeric material, and wherein at least one of the first and second alignment layers has liquid crystal moieties with distributed directors which induce passive lens power.