Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1996-05-30
1998-07-28
Tran, Thang V.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 4412, 369112, G11B 7135
Patent
active
057870586
ABSTRACT:
Disclosed is an optical pickup apparatus being manufactured with ease and utilizing the intensity of a laser beam effectively. The optical pickup apparatus comprises a polygonal prism having an upper surface, an incline surface, and a bottom surface. A laser beam emitted from laser source is reflected by the incline surface of the prism and is converged on an optical disc. Then, the reflected laser beam reflected by the optical disc is transmitted through the incline surface of the prism and is reflected by a Fresnel lens at the bottom surface of the prism and finally is focused on the photodetector. The optical pickup apparatus records and reproduces information on and from the optical disc and performs as a focusing servo and a tracking servo of the objective lens by utilizing data of the reflected information beam received by the photodetector.
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Daewoo Electronics Co. Ltd.
Tran Thang V.
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