Liquid crystal cell for use in coherent beams
Patent 6535257 Issued on March 18, 2003. Estimated Expiration Date: 
April 25, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 25, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesVariable attenuation electro-optic device Polarization-independent optical switch/attenuator Optical isolator with low polarization mode dispersion Patent #: 5557692 InventorAssigneeApplicationNo. 842151 filed on 04/25/2001US Classes:349/113, Reflector349/196, Beam dividing switch formed from liquid crystal cell385/34Rod typeExaminersPrimary: Sikes, William L.Assistant: Nguyen, Duc Attorney, Agent or FirmForeign Patent References
International ClassesG02F 001/133.5G02F 001/13 G02B 006/32 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.Other References
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