Tunable optical device and optical system using the tunable optical device as coding filter

摘要

According to the present invention the tunable optical device comprises a first optical wave guide and a second optical wave guide defining a space between the two wave guides with space comprises the first cell with liquid crystal material and a second cell with liquid crystal material spaced by a third wave guide and the first and the second cell for liquid crystal material having orientation of the liquid crystal material perpendicular to each other.