Patent ID: 7751299

Claim:
An optical pickup device comprising: a first light source for emitting a first laser beam, a second light source for emitting a second laser beam having a wavelength different from a wavelength of the first laser beam, a light separation element having a wavelength selection film for reflecting the first laser beam emitted from the first light source and for allowing the second laser beam emitted from the second light source to pass therethrough, a first reflection part for reflecting the first laser beam that is emitted from the first light source and that is not incident on the wavelength selection film, and a second reflection part for reflecting the second laser beam that is emitted from the second light source and that is not incident on the wavelength selection film, an object lens for focusing the first laser beam, emitted from the first light source and reflected by the wavelength selection film, on a recording surface of an information recording medium and for focusing the second laser beam, emitted from the second light source and having passed through the wavelength selection film, on the recording surface of the information recording medium, and an optical monitor for detecting a light quantity of the first laser beam emitted from the first light source and reflected by the first reflection part and for detecting a light quantity of the second laser beam emitted from the second light source and reflected by the second reflection part.