Patent ID: 7636293
Filing Date: 2009-12-22
Classification: G11B

Abstract:
1. An optical pickup device comprising: a first light emitting unit that emits a laser beam having a first wavelength and a laser beam having a second wavelength different from the first wavelength; a second light emitting unit that emits a laser beam having a third wavelength longer than the first and second wavelengths; first collimating means for transmitting the laser beam having the first wavelength and the laser beam having the second wavelength; second collimating means for transmitting the laser beam having the third wavelength; a first objective lens that transmits the laser beam having the first wavelength transmitted through the first collimating means or the laser beam having the third wavelength transmitted through the second collimating means; and a second objective lens that transmits the laser beam having the second wavelength transmitted through the first collimating means.