Koninklijke Philips Corporation N.v.

Peter Van Der Walle

Robert Frans Maria Hendriks

Thomas Jan De Hoog

Aukje Arianne Annette Kastelijn

The invention relates to an information carrier () intended to be read and/or written by a periodic array of light spots, said information carrier () comprising a data area () defined by a set of elementary data areas, a first periodic structure () intended to interfere with said periodic array of light spots for generating a first moir&#xe9; pattern, a second periodic structure () intended to interfere with said periodic array of light spots for generating a second moir&#xe9; pattern, said second periodic structure () being arranged perpendicularly to said first periodic structure (). The invention also relates to an apparatus for reading and/or writing said information carrier ().

Information carrier, and system for positioning such an information carrier in a reading and/or writing apparatus

The invention relates to an information carrier, and a system for positioning such an information carrier in an apparatus. This system comprises an optical element () for generating a periodic array of light spots () intended to be applied to an information carrier (), said information carrier () comprising a first periodic structure () intended to interfere with said periodic array of light spots () for generating a first Moir&#xe9; pattern, and a second periodic structure () intended to interfere with said periodic array of light spots () for generating a second Moir&#xe9; pattern, analysis means for deriving from said first and second Moir&#xe9; patterns, the angle value (S) between said periodic array of light spots () and said information carrier (), and actuation means (AC-AC-AC) for adjusting the angular position of said information carrier () with respect to said array of light spots (), from control signals () derived based on said angle value (S).

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Eindhoven, Netherlands

Peter Van Der Walle