Patent ID: 7362667
Filing Date: 2008-04-22
Classification: G11B

Abstract:
1. An optical information reproduction apparatus comprising: an optical pickup including: a focus servo unit for controlling a position of the object lens, to thereby move the focus of the optical beam to a just focus point where the focus of the optical beam meets with an information recording surface of said one of the information recording media; a first focus search unit for controlling the object lens to move toward said one of the information recording media; a second focus search unit for controlling the object lens to move away from said one of the information recording media; a first focus servo lead-in unit for converting an operation of the first focus search unit to an operation of the focus servo unit during the operation of the first focus search unit; and a second focus servo lead-in unit for converting an operation of the second focus search unit to an operation of the focus servo unit during the operation of the second focus search unit, wherein, if a focus servo is led in by using the optical beam having the first wavelength, the focus servo is led in by using the second focus servo lead-in unit, and if the focus servo is led in by using the optical beam having the second wavelength, the focus servo is led in by using the first focus servo lead-in unit, and wherein the first wavelength of the optical beam source is different from the second wavelength of the optical beam source.