DEFORMED HELIX FERRO-ELECTRIC LIQUID CRYSTAL OPTICAL DEVICE

摘要

An optical device including an optical input means for inputting an optical signal; at least a first thin polarising layer bonded to the optical input means and providing a first predetermined polarisation output for the optical signal; and a variable birefringent material subject to a variable birefringence in the presence of an electric field, providing a variable polarisation rotation of said predetermined polarisation output signal to produce a sensed polarisation output signal.