Read write device for optical memory and method therefore

摘要

A method and miniaturizable device is described to read/write information to an optical storage medium ( 11 ). A device comprises one or more light sources ( 12 ) bounded up with an access unit ( 10 ) which is arranged to be controllable to a position, in which light beams ( 21, 22 ) are transmitted transversal towards an optical storage medium, and reflected light beams ( 33 ) are analysed by a detector element ( 18, 26 ) which further informs the access unit whether to move or stand still to keep light beams in focus and on track. A device according to the invention is possible to implement in a small size and low weight due to reduced component count and thin access unit geometries. A communication device ( 80 ) according to the invention may be implemented to fulfil a crucial need for ultraminiature range of communication devices.