Compensating device imbalance of a reflecting mirror belonging to an optical system of illumination of a support for information

摘要

The present invention relates to a device which makes it possible to control the imbalance of the mirror of an optical system of illumination a data carrier, when this mirror is subjected to a rapid movement. / p & & p & the jamming of this imbalance is effected thanks to the means of a photo - detectors 10, 12, which receive the application referred back by an element reflective m situated around the lens 0 of the optical system of illumination of the support. The servo-control means 27 then make it possible to control the position of the mirror m / p & & p & application, in particular, in the field of the computer at the access to information stored on a disk.