Photorefractive holographic recording media

G - Physics – 11 – C

Patent

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Details

G11C 13/04 (2006.01) G03C 1/705 (2006.01) G03H 1/02 (2006.01) G11B 7/0065 (2006.01) G11B 7/24 (2006.01) G11B 7/243 (2006.01)

Patent

CA 2394541

A holographic recording medium comprising an amorphous host material which undergoes a phase change from a first to a second thermodynamic phase in response to a temperature rise above a predetermined transition temperature; a plurality of photo-sensitive molecular units embedded in the host material and which can be orientated in response to illumination from a light source; whereby said molecular units may be so orientated when said host material is at a temperature equal to or above said transition temperature but retain a substantially fixed orientation at temperatures below said transition temperature.

L'invention concerne un support d'enregistrement holographique comprenant un matériau hôte amorphe soumis à un changement de phase, passant d'une première à une seconde phase thermodynamique en réponse à une hausse de température au-dessus d'une température de transition prédéterminée; une pluralité d'unités moléculaires photosensibles renfermées dans le matériau hôte et pouvant être orientées en réponse à un éclairage provenant d'une source lumineuse; de ce fait, lesdites unités moléculaires peuvent être orientées de cette manière lorsque le matériau hôte est à une température égale ou supérieure à la température de transition mais elles conservent une orientation sensiblement fixe aux températures inférieures à ladite température de transition.

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