Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1991-06-07
1993-09-21
Sikes, William L.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
357 73, 357 84, 357 53, 357 63, G02F 113, G09G 126
Patent
active
052473783
ABSTRACT:
The present invention is an optical retarder comprising a liquid crystal variable retardance cell having substrates (2) on either side thereof, each substrate having a transparent electrode (3) on its inner face, a nematic phase liquid crystal material (9) between the substrates (2), means for applying a drive voltage to the transparent electrodes (3), means for sensing the capacitance of the liquid crystal cell and means for determining the retardance of the cell corresponding to the sense capacitance thereof. A tunable hybrid element comprising such an optical retarder in combination with a fixed retardance element (1) is also disclosed. Also disclosed is a tunable Lyot filter based on multiple hybrid retardance elements.
REFERENCES:
patent: 2600962 (1952-06-01), Billings
patent: 4272195 (1981-06-01), Kaye
patent: 4385806 (1983-05-01), Fergason
patent: 4387963 (1983-06-01), Brennan
patent: 4394069 (1983-07-01), Kaye
patent: 4444469 (1984-04-01), Kaye
patent: 4497542 (1985-02-01), Kaye
patent: 4548474 (1985-10-01), Nagae et al.
patent: 4582396 (1986-04-01), Bos et al.
patent: 4763992 (1988-08-01), Takada et al.
patent: 4848877 (1989-07-01), Miller
patent: 4889412 (1989-12-01), Clerc et al.
Born, M. and Wolf, E. "Principles of Optics", Pergamon Press, New York 91975).
Yariv, A. and Yeh, P., "Optical Waves in Crystals", Wiley Interscience, New York (1984).
Cognard, J., Alignment of Nemantic Liquid Crystals and Their Mixtures, Monograph: "Molecular Crystals and Liquid Crystal", Suppl. 1 (1982).
Priestly, E. B., "Introduction to Liquid Crystals", Chapters 6, 8, 12, 14, Plenum Press, New York (1979).
Jacobs, S. D., J. OSA B5, No. 9, "Liquid crystal laser optics: design, fabrication, and performance" (1988).
Title, A. M.; Rosenberg, W. J.; "Tunable Birefringent Networks", SPIE vol. 202 Active Optical Devices pp. 47-53 (1979).
Blinov, L. M., "Electro-Optical and Magneto-Optical Properties of Liquid Crystals", John Wiley & Sons, Ltd. pp. 101-130 (1983).
Mai Huy K.
Sikes William L.
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