Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1992-11-19
1994-10-04
Ben, Loha
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 51, 359600, 33241, 33246, 33262, 33281, 33298, G02F 113
Patent
active
053531345
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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Patent Abstracts of Japan, vol. 011, No. 345 (P-636) Jun. 10, 1987 & JP A-62 127 826.
Le Pesant Jean-Pierre
Michel Claude
"Thomson-CSF"
Ben Loha
Robbins Thomas
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