G - Physics – 11 – B
Patent
G - Physics
11
B
352/32.4
G11B 19/20 (2006.01) G11B 7/0037 (2006.01) G11B 7/085 (2006.01) G11B 7/095 (2006.01) G11B 17/32 (2006.01)
Patent
CA 1253963
22 ABSTRACT "Electro-optical device" The invention relates to an electro-optical device for recording and/or reading recording tracks in a recording surface of an optically readable disk having a plane surface (11) by means of a radiation beam, comprising a frame (43), a turntable support- ing means (45) for a turntable (55) which is rotatable about an axis of rotation (57), an objective supporting means for an object- ive (15) having an optical axis (24), a focussing actuator (24) for moving the objective along the optical axis, guide means for moving the objective and/or the turntable relative to each other between a first position, in which they are situated nearer each other, and a second position, in which they are situated more remote from each other, and correction means for reducing, in the case of an oblique position of said surface of the disk, the angle between said optical axis and the normal to said surface at the location where the optical axis intersects the disk surface. The correction means comprise a tilting device for tilting the turntable sup- porting means and/or objective supporting means during recording and/or reading of the recording tracks about a pivotal axis (99) which extends at least substantially transversely of the plane defined by the optical axis and the axis of rotation and which, at least in the second position of the objective and the turntable, is situated between the axis of rotation and the optical axis. (Fig. 1).
502896
Gijzen Wilhelmus A.h.
Van Rosmalen Gerard E.
Fetherstonhaugh & Co.
Koninklijke Philips Electronics N.v.
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