High density optical disk with V-shaped grooves
- 15 January 1983
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 42 (2) , 144-146
- https://doi.org/10.1063/1.93853
Abstract
Properties of diffracted light back from an optical disk, which has grooves with a V-shaped cross-sectional configuration, are studied by employing scalar diffraction theory. The V-shaped grooves are spaced bottom to bottom by a presently used track pitch, and all walls of the grooves are capable of storing information. If the optical depth of the V-shaped groove is one-fourth of the wavelength of the laser, the 2nd or (−2)nd diffracted light beam contains only the information on a single wall. This property is utilized to double the information density of the optical disk.Keywords
This publication has 2 references indexed in Scilit:
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- Diffraction theory of laser read-out systems for optical video discsJournal of the Optical Society of America, 1979