Title :
Liquid crystal lens with focal length variable from negative to positive values
Author :
Wang, Bin ; Ye, Mao ; Sato, Susumu
Author_Institution :
Dept. of Electr. & Electron. Eng., Akita Univ., Japan
Abstract :
A liquid crystal (LC) lens with focal length variable from negative to positive is reported. There are three electrodes in the LC cell. One electrode has a circular hole in the center. The lens is driven by two voltages that produce a spatially nonuniform and symmetrical electric field in the LC layer. By adjusting the voltages, a wide range of lens power is covered. The LC lens preserves its optical quality over the entire focus range.
Keywords :
electrodes; lenses; liquid crystal devices; optical design techniques; optical focusing; LC cell; electrodes; focal length variable; lens power; liquid crystal lens; optical quality; spatially nonuniform electric field; symmetrical electric field; Dielectrics; Electrodes; Glass; Indium tin oxide; Lenses; Liquid crystals; Nonuniform electric fields; Slabs; Substrates; Voltage; Lens power; liquid crystal (LC) lens; negative lens; positive lens;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.860397
