Magnetooptical recording/reproducing apparatus.

摘要

A magnetooptical recording/reproducing apparatus is provided with a device for determinating a power of light beam which is emitted from a light source. In the apparatus, the light beam is irradiated on a magnetooptical recording medium while applying a magnetic field modulated according to a recording signal to a portion on which the light beam is being irradiated. Light reflected from the medium upon the irradiation of the light beam thereto is detected by a detector the output from which is used to reproduce the recording signal. The amplitude of the recording signal is detected from the reproduction signal. The power of the light beam to be emitted from the light source is determined on the basis of the detected amplitude of the recording signal. <IMAGE>