A bit engine for digital video recording (DVR) on a 12 cm disc with 22 Gbytes user capacity and 50 Mbit/s data rate

Abstract

An optical disc drive has been built according to the specifications of the DVR format, using a blue laser diode and an objective lens. New components have been developed and incorporated in the drive. such as a rigid lens objective, a plastic lens shaper, an adjustable collimator and a laser driver IC.