OPTISCHE ABTASTVORRICHTUNG

摘要

Data are recorded over each other both by means of pits and in a magnetic layer on an optical recording medium consisting of a combination of an optical and a magneto-optical recording medium. Said data can be read using a suitable optical scanning device with a light beam. To suppress crosstalk between the data signal (PS) obtained from the pits and the data signal (MS) obtained from the magnetic layer, two light beams (VL, HL) polarized at right angles to each other are focused at a predetermined distance (X) apart onto the recording medium (AT), which reflects each beam onto one of four photodetectors (VP, E, F, G) depending on their direction of polarization. The data signals (PS, MS) and the control signals (FE, TE) for the focusing-control and the track-control circuit are obtained from the output signals of said photodetectors. Magneto-optical recording and reproducing equipment applications.