U.S. Philips Corporation

Francois D Dekker

Antonius A Van Alem

Johannes T Van De Veerdonk

Lieuwe Boonstra

An optical scanning device scans recording tracks on a record carrier with the aid of a beam of radiation, while an objective, which concentrates the beam of radiation to a scanning spot, performs automatic electrically controlled movements in a direction perpendicular to the plane of the record carrier with the aid of a focussing bearing arrangement, so as to ensure a continuous focussing of the scanning spot on the recording tracks. Moreover, in order to follow the oscillations of the recording track, the objective also performs electrically controlled movements which are such that the scanning spot moves at least substantially parallel to the plane of the record carrier.

Growing community of inventors

Amsterdam, Netherlands

Francois D Dekker