G - Physics – 11 – B
Patent
G - Physics
11
B
352/32.4
G11B 7/24 (2006.01) G11B 7/00 (2006.01) G11B 7/007 (2006.01) G11B 7/013 (2006.01) G11B 7/09 (2006.01) G11B 7/12 (2006.01)
Patent
CA 1150409
19-9-1979 PHN 9567 ABSTRACT: "Record carrier containing information in an optically readable information structure, as well as read apparatus for said record carrier" A record carrier is described having an opti- cally readable information structure comprising trackwise arranged information areas, as well as an appeatus for reading said record carrier. By using two mutually perpen- cidulatly polarized beams components for reading and by giving the information areas of adjacent track portions a different geometry, in wuch a way that said areas can be read in an optimum manner by only one of the beam compon- ents and is virtually not observed by the other beam component, the track distance can be reduced without in- creasing the crosstalk, so that the information content of the record carrier is increased.
358910
Dil Jan G.
Heemskerk Jacobus P.j.
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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