Information Carrier, and System for Positioning Such an Information Carrier in a Reading and/or Writing Apparatus

摘要

The invention relates to an information carrier ( 101 ) intended to be read and/or written by a periodic array of light spots, said information carrier ( 101 ) comprising a data area (105) defined by a set of elementary data areas, a first periodic structure ( 108 ) intended to interfere with said periodic array of light spots for generating a first moiré pattern, a second periodic structure ( 109 ) intended to interfere with said periodic array of light spots for generating a second moiré pattern, said second periodic structure ( 109 ) being arranged perpendicularly to said first periodic structure ( 108 ). The invention also relates to an apparatus for reading and/or writing said information carrier ( 101 ).