<title>V-grooved optical disc applied to HDTV signal recording</title>

Abstract

We have realized a V-grooved optical disc that achieves an increase in recording density over conventional optical discs. This report describes the results of our research : namely, its fabrication process and optical read-out method.The features of the V-grooved optical disc system are:1.2mm, NA must be limited to a maximum of 0.6.