Optical: systems and elements – Holographic system or element – Having optical element between object and recording medium
Patent
1993-06-01
1995-12-19
Sikes, William L.
Optical: systems and elements
Holographic system or element
Having optical element between object and recording medium
359 93, 359 94, 359250, 359259, 359303, 359279, 356 501, 385 16, G02F 113, G02F 11335
Patent
active
054773504
ABSTRACT:
An interferometric switch for spatially switching either linearly polarized or unpolarized externally derived beams of substantially coherent light includes an optical input unit for dividing an externally derived light beam into a constituent beam pair. An optical phase modulating device includes a nematic liquid crystal pixel for selectively shifting the relative phase of the constituent beam pair. An output unit cooperates to combine respective components of the constituent beam pair along coincident collinear paths so as to form a respective output light beam directed along a selected one of first and second output axes, according to the relative phase imparted by the phase-modulating device. The phase modulating device may comprise a cascading arrangement of pixel stages which can respectively provide a selected incremental phase-shift to each constituent beam passing therethrough.
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Castleberry Donald E.
Credelle Thomas L.
DeJule Michael C.
Riza Nabeel A.
General Electric Company
Mora Enrique J.
Parker Kenneth
Sikes William L.
Snyder Marvin
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