Koninklijke Philips Corporation N.v.

Canniputhur Santhana Krishnan Sanjay Krishnan

Wooi Liang Chin

Aik Seng Yak

A device for recording and/or reproducing an optical record carrier (), comprises an optical system for projecting a first, a second and a third optical beam at a first (), a second () and a third spot () at the record carrier (). The device further comprises detection elements primary position signals (D, C, D) which is indicative for an amount of radiation reflected by the record carrier at said thoses spots (). The device further comprises signal processing means () for generating a plurality of secondary position signals (S, S, S, S) in response to the primary position signals (D, C, D). A selection element () selects one of the position signals (S, S, D, S, S) as an output signal (WRE) in response to a selection signal (SEL). The selection signal (SEL) is derived from the output signal (WRE) of the selection element ().

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Chennai, India

Canniputhur Santhana Krishnan Sanjay Krishnan