Optical information carrier containing bragg reflectors

Details Optical information carrier containing bragg reflectors Optical information carrier containing bragg reflectors

G - Physics

11

B

G11B 7/24 (2006.01)

Patent

CA 2530282

The invention refers to an optical information carrier (1) for carrying information to be read out by means of an optical beam (9) having at least one information layer (6). It is an object of the invention to provide information carriers (1) with improved collection efficiency. To achieve this object the at least one information layer (1) contains Bragg reflectors for reflecting light of the optical beam (9), when said Bragg reflector is heated above a reflectance threshold temperature by said optical beam.

L'invention concerne un support d'information optique (1) renfermant des informations destinées à être lues au moyen d'un faisceau optique (9), ledit support comportant au moins une couche d'information (6). L'invention a pour objet d'améliorer l'efficacité de collecte de ces supports d'information (1). A cet effet, la couche d'information (6) contient des réflecteurs de Bragg réfléchissant la lumière du faisceau optique (9) lorsqu'ils sont chauffés par ce dernier à une température supérieure à la température de seuil de réflectance.

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