LASER PACKAGE, OPTICAL PICKUP, AND OPTICAL DISK DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an optical pickup which provides a servo signal which is stable without interference of the stray light by a main light beam reflected in an adjacent layer different from a target signal recording surface and a sub-light beam, and also to provide an optical disk device.

SOLUTION: The optical pickup is equipped with: a first light source 1 which emits a first light beam; a second light source 1 which emits a second light beam which has almost the same wavelength as the first light beam and is incoherent to the first light beam; an objective lens 8 which condenses the first and second light beams on the disk; and a photodetector 10 which receives the first and second light beams reflected by the disk.

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