Switchable holographic optical system

G - Physics – 02 – B

Patent

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Details

G02B 5/32 (2006.01) G02F 1/1333 (2006.01) G02F 1/1347 (2006.01) G02F 1/1334 (2006.01) G02F 1/13357 (2006.01)

Patent

CA 2336850

Disclosed is an optical system (312) and an imaging and display system using the optical system. The optical system has at least first (330) and second (332) optical elements aligned on a common axis (334). In one embodiment, each of the first and second optical elements can operate in an active state or in inactive state and comprise a photopolymer and liquid crystal combination (12). Each of the first and second optical elements is configured to transmit incident light substantially unaltered when each of the first and second optical elements operates in the inactive state. In the active state, however, each of the first and second optical elements does not transmit incident light substantially unaltered. Rather each of the first and second optical elements substantially alters light incident thereon when each of the first and second optical elements operates in the active state.

L'invention concerne un système optique (312) et un système d'imagerie et d'affichage mettant en oeuvre ledit système optique. Ce système optique comprend au moins un premier (330) et un deuxième (332) éléments optiques alignés sur un axe commun (334). Dans une forme de réalisation, chacun desdits premier et un deuxième éléments optiques peut fonctionner dans un état actif ou dans un état inactif et comprend une en combinaison (12) de photopolymère et de cristaux liquides. Chacun desdits éléments optiques est configuré pour transmettre une lumière incidente sensiblement intacte lorsqu'il fonctionne dans l'état inactif. Dans l'état actif, toutefois, aucun desdits premier et deuxième éléments optiques ne transmet de lumière incidente sensiblement intacte. Au contraire, les deux éléments optiques modifient sensiblement la lumière qui vient les frapper, lorsqu'ils fonctionnent dans l'état actif.

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