Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1988-03-25
1991-11-19
Miller, Stanley D.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 51, 359104, 359 84, 324501, G02F 113
Patent
active
050661043
ABSTRACT:
An electrical apparatus having a liquid crystal fault indicator, comprising: an electrical component subject to electrical fault; a smectic liquid crystal display having an indicating element having a first and a second visual state, said indicating element being capable of transitioning from the first to the second visual state upon the application of an electric field sufficient to realign the smectic liquid crystal material contained therein and remaining in the second visual state after the removal of the electric field and further being capable of transitioning from the second to the first visual state upon heating to at least a delatching temperature Td sufficient to destroy the electric field induced alignment of the smectic liquid crystals; and fault signal means for providing, upon the occurrence of a fault, a prescribed input sufficient to cause said indicating element to transition from a visual state indicative of an unfaulted condition to a visual state indicative of a faulted condition.
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Mohebban Manoochehr
Montoya Wayne
Parker Robert
Siden Dennis C.
Burkard Herbert G.
Chao Yuan
Miller Stanley D.
Phan Trong
Raychem Corporation
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