Patent ID: 7035174
Filing Date: 2006-04-25
Classification: G11B

Abstract:
1. An optical pickup adapted to irradiate a laser beam to an optical recording medium, detect a return light from the optical recording medium and providing a result of return light detection, the optical pickup comprising: first and second light sources that emit laser beams of different wavelengths, respectively; a photodetector that detects the return light from the optical recording medium; and an optical system that converges the laser beam emitted from a selected one of the first and second light sources onto the optical recording medium and guides a return light from the optical recording medium to the photodetector; and wherein the first and second light sources are disposed so that the laser beam emitted from the first light source and the laser beam emitted from the second light source are deformed in the same direction, and wherein the optical system includes an astigmatism correcting means for correcting astigmatism associated with the laser beams emitted from both the first and second light sources.