Patent ID: 7315504

Claim:
A front monitor-type optical pickup apparatus for emitting a laser light beam from a laser light source to an information recording medium and detecting a quantity of the emitted laser light beam comprising: a front monitor detector for executing feedback control of output power from the laser light source based on the detected quantity of the laser light beam while reading information from the information recording medium and/or writing information onto the information recording medium with use of the laser light beam, comprising: a housing which houses the front monitor detector; a window which is formed on a wall of the housing for taking in the laser light beam from the laser light source on an outside of the housing; and a flexible substrate which is housed in the housing and on which the front monitor detector is mounted with its rear surface fixed directly thereto, wherein, in the housing, a position of the front monitor detector is adjustable via the flexible substrate, an inner size of the housing is set larger than a size of the front monitor detector in longitudinal direction perpendicular to a housing front face on which the window is present, and in the housing, on a rear side of the front monitor detector, part of the flexible substrate incorporating the front monitor detector is inserted in the state of being bended so as to press the front monitor detector to the housing front wall.