Optically read disks with increased information density
- 15 July 1983
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 22 (14) , 2196-2201
- https://doi.org/10.1364/ao.22.002196
Abstract
A method is described which allows an increase of information density on optically read disks by a reduction of the track spacing by a factor of 2. The cross talk between neighboring tracks is maintained at an acceptable level by modulating from track to track the depth of the relief pattern on the disk. By an appropriate readout method (a compromise between differential and integral detection), the signals from neighboring tracks are suppressed. The layout of such a disk and the possible geometries of the relief pattern are indicated.Keywords
This publication has 2 references indexed in Scilit:
- Diffraction theory of laser read-out systems for optical video discsJournal of the Optical Society of America, 1979
- Optical Readout of VideodiscIEEE Transactions on Consumer Electronics, 1976