OPTICAL PICK-UP

摘要

a beam generator for generating laser beam; a detector for detecting signal from the beam; a die cell for converting the beam generated from the beam generator into beams with various wavelengths; a movable dispersion prism for separating one type of beam selectively; an amplifier for amplifying one type of beam selectively; a focusing means for focusing one separated beam on an optical recording media. The optical pick-up enables to record and play a optical disc stacked with more than one layer.