Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1992-03-30
1993-02-02
Howell, Janice A.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 84, 359 94, 359103, G02F 1137, G02F 113
Patent
active
051842335
ABSTRACT:
A composite material (20) has electrically conducting, elongated particles (22) dispersed in a liquid crystal (24). The index of refraction to microwaves is controllable by the application of a transverse electric field that aligns the liquid crystal material (24) and the particles (22). A phase modulating cell (31) is formed by placing the composite material (20) inside a microwave wave guide (32), with transverse electrodes (36) built into the sides of the wave guide (32). Another set of transverse electrodes or magnet pole pieces (30) can be provided to align the liquid crystal material (24) and the particles (22) in another direction, thereby switching the index of refraction of the cell (31). The particles (22) may be made of a ferromagnetic material, to permit magentic as well as electrical switching.
REFERENCES:
patent: 3631501 (1971-12-01), Buscher
patent: 3701058 (1972-10-01), Smith
patent: 3805197 (1974-04-01), Buscher
patent: 4435047 (1984-03-01), Fergason
patent: 4613869 (1986-09-01), Ajioka et al.
patent: 4666253 (1987-05-01), Yoshida
patent: 4668415 (1987-05-01), Luise
patent: 4688900 (1987-08-01), Doane et al.
patent: 4701024 (1987-10-01), Kobayashi et al.
patent: 4877501 (1989-10-01), Schnur et al.
patent: 4911981 (1990-03-01), Schnur et al.
patent: 4946623 (1990-08-01), Tabony
patent: 5049307 (1991-09-01), Tabony
"Suspended Particle Display with Improved Properties", R. L. Saxe et al., 1982 IEEE, 1982 International Display Research Conference.
"Nonlinear Microwave Susceptibility Measurement of an Artificial Kerr Medium", Bradley Bobbs et al., Appl. Phys. Lett., vol. 52, No. 1, Jan. 4, 1988, pp. 4-6.
"Liquid Dielectric Phase Shifters", Final Report for Contract DAAK40-76-C-0516, S. Kaye et al.
"Electrically Controllable Liquid Artificial Dielectric Media", H. T. Buscher, 1979 IEEE.
"Electrooptical Characteristics of Dipole Suspensions", A. M. Marks, Applied Optics, Jul. 1969, vol. 8, No. 7, pp. 1397-1412.
Lackner Anna M.
Lim Khoon C.
Margerum J. David
Miller Leroy J.
Denson-Low W. K.
Gross Anita Pellman
Howell Janice A.
Hughes Aircraft Company
Leitereg E. E.
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