Patent ID: 6059555
Filing Date: 2000-05-09
Classification: G11B,Y10S

Abstract:
Apparatus for directing portions of a laser beam simultaneously at opposite sides of a first disk being textured by pulses from said laser beam, wherein said apparatus comprises:a first beamsplitter dividing said laser beam into transmitted and reflected beams;first beam directing means for directing said transmitted beam along a first optical path and for directing said reflected beam along a second optical path;attenuation means disposed along each said optical path for controlling an output power level of an output beam directed therefrom;power detection means disposed along each said optical path for measuring said output power level, andsecond beam directing means for directing a first output beam along said first optical path to a first side of said first disk and for directing a second output beam along said second optical path to a second side of said first disk, opposite said first side thereof.