Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1992-02-18
1993-03-16
Hille, Rolf
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 36, 359 94, 333157, 343771, G02F 113
Patent
active
051949725
ABSTRACT:
A liquid crystal is used as the phase modulating medium in a microwave phase modulating cell (20). Applied electric and/or magnetic fields transverse to the direction of wave propagation create a birefringence that changes the velocity of wave propagation and the index of refraction of the medium. The phase modulating cell (20) is used singly or in arrays to direct microwave beams.
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Lackner Anna M.
Lim Khoon C.
Margerum J. David
Miller Leroy J.
Denson-Low W. K.
Duraiswamy V. D.
Hille Rolf
Hughes Aircraft Company
Leitereg E. E.
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