Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1994-06-03
1995-01-03
Sikes, William L.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 52, 359 40, 359410, 359 53, 351158, 33262, 345 8, G02F 113, G09G 336
Patent
active
053791401
ABSTRACT:
Material made up of a thin layer between two surfaces, a first and a second, to be used as the third layer of a transparent goggles face, the first layer being a screen and the second layer being a thickness layer, remarkable in that the material consists of a formable transparent polymer matrix having a refractive index and containing micro-cavities in the form of lenses, the micro-cavities being made from a transparent material different from that of the matrix, the refractive index of the material of the micro-cavities changing under the influence of an electric field applied across it, for a first field value the refractive index being equal to that of the matrix, and for a second field value being greater than that of the matrix, a pair of electrodes being associated with each micro-cavity.
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Le Pesant Jean-Pierre
Michel Claude
"Thomson-CSF"
Duong Tai V.
Sikes William L.
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