Other

Eiji Ohno

Kenichi Nishiuchi

Naoyasu Miyagawa

Both guide grooves and lands of an optical information recording medium constitute information tracks, the depth of the guide groove being between approximately .lambda./8 and approximately .lambda./4.7 in optical length and the width of the guide groove being between 0.34R and R, where R represents the beam diameter of a write laser beam on the record film and the power for writing information on each guide groove being differentiated from that for writing information on each land.

Growing community of inventors

Hirakata-shi, Osaka, Japan

Eiji Ohno