APPARATUS AND METHOD FOR GENERATING A SCANNING BEAM IN AN OPTICAL PICKUP HEAD, MINIATURE OPTICAL PICKUP HEAD AND OPTICAL STORAGE SYSTEM INCORPORATING A MINIATURE PICKUP HEAD

摘要

A miniaturised optical pickup head for an optical storage system in which a well-collimated beam is generated. The optical pickup head comprises an optical system comprising a collimator leans and a reflective or diffractive elements, such as a 45 degree mirror. The optical system is attached to a cover plate and extends into a cavity defined by the cover plate and a substrate on which a radiation source is provided. The cover plate, and therefore, the optical system including the collimator lens is movable relative to the radiation source in a direction parallel to the optical axis of the collimator lends and the substrate so as to adjust the alignment of the collimator lens relative to the radiation beam generated by the radiation source.