Optical read/write head of an optical disk and an optical...

Details Optical read/write head of an optical disk and an optical... Optical read/write head of an optical disk and an optical...

G - Physics

11

B

352/32.21, 352/3

G11B 7/095 (2006.01) G11B 7/08 (2006.01) G11B 7/09 (2006.01)

Patent

CA 1203902

Abstract of the Disclosure An optical head is provided for writing and reading a disk by means of at least one focused beam, the disk being provided with at least one track having uni- formly spaced grooves. The optical head makes use of a motor comprising a fixed magnetic circuit provided with at least one air-gap in which a moving system is capable of displacement and also provided with an access and radial tracking magnetic circuit including at least one core which is secant with all the grooves. The moving system is constituted by two actuators, the first actuator being intended to permit access and radial tracking whilst the second actuator permits focusing of the light beam on the track, the two actuators being coupled by flexible attachment means. Guiding means com- prising magnetic elements permit lifting of the access and radial tracking actuator with respect to the core of its magnetic circuit. -1-

422594

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