Variable attenuation electro-optic device
Polarization-independent optical switch/attenuator
Optical isolator with low polarization mode dispersion Patent #: 5557692
ApplicationNo. 842151 filed on 04/25/2001
US Classes:349/113, Reflector349/196, Beam dividing switch formed from liquid crystal cell385/34Rod type
ExaminersPrimary: Sikes, William L.
Assistant: Nguyen, Duc
Attorney, Agent or Firm
Foreign Patent References
International ClassesG02F 001/133.5
AbstractA liquid crystal cell assembly is described which eliminates high-order multiple-beam interference from reflections at the interfaces between the various elements. It can incorporate fixed retarders for compensation or production of high retardances. The invention enables standard, economical methods to be used in making the liquid crystal cell, retarder elements, optical coatings, and overall assembly. Transmissive and reflective embodiments are shown.