Patent ID: 7502301
Filing Date: 2009-03-10
Classification: G02B

Abstract:
1. An optical pickup apparatus comprising: a light source portion in which a first semiconductor laser light source and a second semiconductor laser light source for respectively emitting light of a first wavelength and a second wavelength which are at least two different wavelengths are provided inside the same package; a converging optical system in which a first light beam having the first wavelength emitted from the first semiconductor laser light source and a second light beam having the second wavelength emitted from the second semiconductor laser light source respectively pass through an objective lens placed in a position opposed to an optical record medium and thereby each the light beam is caused to converge on the optical record medium; a photodetector for receiving a light beam for detection reflected by the optical record medium and outputting a current; a light detection optical system for guiding the light beam for detection to the photodetector, a diffraction grating for plural wavelengths including: