OPTICAL PICKUP DEVICE, OPTICAL PICKUP ADJUSTMENT METHOD, AND OPTICAL DISK UNIT

摘要

PROBLEM TO BE SOLVED: To provide an optical pickup device including a laser output unit in which a plurality of light emitting parts each emitting a laser beam of different wavelength are disposed in parallel to each other, addressing displacement of a light source by a simple adjustment method without using a diffraction grating for addressing displacement of the light source of plural pieces of return light.SOLUTION: The optical pickup device comprises: a laser output unit 10 in which a plurality of light emitting parts each emitting a laser beam of different wavelength are disposed in parallel to each other; a sensor lens 70 including a cylindrical surface for applying astigmatism to return light reflected from an optical recording medium 1 irradiated with a laser beam; a photodetector 90 provided with a plurality of parallel aligned light-receiving surfaces for receiving the return light to which the astigmatism is applied by the sensor lens; and adjustment mechanisms 81, 82 in which the laser output unit or the sensor lens is movably and adjustably provided in a predetermined direction.