The invention relates to a method and an arrangement for a replay or
recording appliance for optical recording media having an inclination
control system for vertical alignment of the scanning beam with respect
to optical recording media. In order to exclude other factors which, in
addition to the inclination of the scanning beam, influence the
radio-frequency signal which is detected by the recording medium, without
any additional inclination sensors from the disadvantageous influence of
the inclination control, an inclination control system is provided which
uses the lower envelope curve signal of a radio-frequency signal which is
detected by the optical recording medium and represents the dark value of
the detected radio-frequency signal. The lower envelope curve signal is
multiplied upstream of an inclination control system by a modulation
signal which is added to the output signal from the inclination
controller for vertical alignment of the scanning beam which is directed
at the optical recording medium. The envelope curve signal which is, for
example, the mirror signal is multiplied by the modulation signal and is
integrated or low-pass filtered in order to form a control error, which
corresponds to an error between the scanning beam, which is directed at
the optical recording medium, and the vertical. The invention is intended
to be used for replay or recording appliances for optical recording media
with inclination control.