ELEKTRISKT STYRD INSTELLNINGSANORDNING FOR ETT LJUSKNIPPE MED DIGITAL OCH ANALOG AVLENKNINGSSTYRNING

摘要

A light deflector used for tracking a spiral information track alternately and periodically interrupted by data blocks and guide segments arranged within sectors of a rotating record carrier. The light deflector is controlled during the first turn of the information track by a slow analog light deflector having a small stroke and is controlled during the remainder of the recording by a digital light deflector control device having a relatively large stroke.