Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1993-10-04
1996-10-22
Sikes, William L.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
342375, 359 41, 359140, G02F 113, G02F 11335, G02F 11347, H01Q 322
Patent
active
055682863
ABSTRACT:
A fast-speed optical switching unit includes a polarization rotation unit having plurality of liquid crystal cells disposed on a common substrate and optically coupled together in series so as to impart a selected linear polarization orientation to an incident light beam. The polarization rotation unit is optically coupled to beam-directing optics such that, dependent on the polarization orientation of the light beam passing from the polarization unit, the light beam is directed onto a predetermined path. The multiple liquid crystal cells driven by a selected control voltage so as to operate in the fast speed regime, thus collectively effecting a faster change in polarization orientation of a light beam passing therethrough than is obtainable with a single liquid crystal cell.
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General Electric Company
Ingraham Donald S.
Sikes William L.
Trice Ron
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