Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1991-11-27
1994-05-31
Sikes, William L.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 53, 359 75, 359 94, 359102, G02F 113, G02F 11335, G02F 1133, G02F 1137
Patent
active
053174291
ABSTRACT:
An optical switching device comprising a first layer having a first refractive index and having a first side where a coherent light is to be entered into the first layer and a second side opposite the first side, second and third layers sandwiching the first layer, the second layer having a main surface, and electrodes sandwiching the second and third layers for applying a voltage between the second and third layers, wherein a refractive index of the second layer can be changed from second to third and from third to second refractive indexes by an electro-optical effect using the voltage, the second refractive index being larger than the third refractive index, wherein the coherent light entering the first layer is totally reflected by the second layer when the second layer has the second refractive index, and at least part of the coherent light is transmitted through the second layer toward the outside of the main surface of the second layer when the second layer has the third refractive index.
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Suinov et al., "Deflector Based on Frustrated Total Internal Reflection of Light", Sov. J. Quantum Electron 7(9), Sep. 1977, pp. 1146-1147.
Channin, "Optical Waveguide Modulation Using Nematic Liquid Crystal", Applied Phys. Lett. vol. 22, No. 8, Apr. 15, 1973, pp. 365-366.
Mochizuki Akihiro
Motoyoshi Katsusada
Fujitsu Limited
Sikes William L.
Trice Ron
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