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Title

Verfahren und Vorrichtung zum Lesen optischer Speichermedien

Date Issued
1999
Author(s)
Tutsch, R.
Mischo, H.
Pfeifer, T.
Patent No
1996-19636595
Abstract
The method involves using the polarised light from a laser diode [4], which is directed through a collimator lens [5] and an optical deflector [7] to produce a static emission [8] and an oscillating emission [9]. Both of the emissions pass through a polarising decoupling unit, and onto a mirror for deflection at right angles through a quarter wave plate [12] and focal lens [13] positioned above the disc [3]. The static beam is modulated by the oscillating beam responding to information for the tracks [1a,1b,1c]. Preferably the oscillation frequency is at least 1 MHz. USE - For compact discs ADVANTAGE - Provides increased data transfer rate.
Language
de
Institute
Fraunhofer-Institut für Produktionstechnologie IPT
Link
http://worldwide.espacenet.com/publicationDetails/biblio?DB=worldwide.espacenet.com&locale=en_EP&FT=D&CC=DE&NR=19636595A
Patenprio
DE 1996-19636595 A: 19960910
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