Head mounted display

G - Physics – 02 – B

Patent

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Details

G02B 27/01 (2006.01) G02B 27/44 (2006.01)

Patent

CA 2760382

A helmet or head-mounted apparatus has a visor or other curved optical element in front of at least one eye of a wearer, which element also is used as a waveguide. Image-bearing light is injected into the waveguide via an input diffractive element, and propagates through the visor to an output diffractive element which releases the light. The optical powers of the curved waveguide and the input and output diffractive elements are selected so that the released light is delivered as an image to the users eye.

Un casque vidéo ou dispositif d'affichage « tête haute » comprend une visière ou un autre élément optique incurvé devant au moins un il d'un utilisateur, élément qui fait également office de guide d'ondes. Une lumière porteuse d'image est introduite dans le guide d'ondes par l'intermédiaire d'un élément diffracteur d'entrée et elle se propage à travers la visière jusqu'à un élément diffracteur de sortie qui libère la lumière. Les puissances optiques du guide d'ondes incurvé et des éléments diffracteurs d'entrée et de sortie sont sélectionnées de telle sorte que la lumière libérée est émise sous la forme d'une image en direction de l'il de l'utilisateur.

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