A record carrier is disclosed having an optically readable information structure comprising trackwise arranged information areas, as well as an apparatus for reading said record carrier. By using two mutually perpendicularly polarized beams components for reading and by giving the information areas of...http://www.google.fr/patents/US4325135?utm_source=gb-gplus-shareBrevet US4325135 - Optical record carrier and apparatus for reading it
Optical record carrier and apparatus for reading it
