MONOLITHIC VCSEL-BASED OPTICAL PICKUP AND SERVO CONTROL DEVICE

摘要

A VCSEL-based monolithic optical pickup system with a retaining member (22), a plurality of VCSELs (30, 32, 34, 36, 38) for emitting laser beams, a plurality of detectors (40, 42, 44, 46, 48) for receiving reflected laser beams, and a stepped micro-mirror (24) for reflecting emitted laser beams toward an optical recording media (2) and for reflecting reflected laser beams toward the plurality of detectors. The VCSELs and detectors can be disposed in laser/detector pairs wherein each detector surrounds its respective VCSEL. The system can incorporate upstanding VCSELs each with a sloped and mirrored side surface (154) and with a detector (156) disposed adjacent to the side surface whereby a laser beam emitted by the VCSEL is reflected by an optical recording media onto the side surface of the VCSEL, and then reflected by the VCSEL onto the detector adjacent to the side surface of the VCSEL.