Patent ID: 6901037

Claim:
Device for recording and/or reproducing an optical record carrier ( 1 ), comprising; an optical system for projecting a first, a second and a third optical beam at a first ( 11 ), a second ( 12 ) and a third spot ( 13 ) at the record carrier ( 1 ), a first detecting element ( 31 . 1 ) for generating a first primary position signal (D 5 ) which is indicative for an amount of radiation reflected by the record carrier at said first spot ( 11 ), a second detection element ( 31 . 2 ) for generating a second primary position signal (C) which is indicative for an amount of radiation reflected by the record carrier at said second spot ( 12 ), a third detection element ( 31 . 3 ) for generating a third primary position signal (D 1 ) which is indicative for an amount of radiation reflected by the record carrier at said third spot ( 13 ), signal processing means ( 34 . 1 , . . . 34 . 4 , . . . 34 . 4 ; 35 . 1 , . . . 35 . 4 ) for generating a plurality of secondary position signals (S 1 , S 2 , S 3 , S 4 ) in response to the primary position signals (D 5 , C, D 1 ), a selection element ( 36 ) for selecting one of the position signals (S 1 , S 2 , D 1 , S 3 , S 4 ) as an output signal (WRE) in response to a selection signal (SEL), characterized in that, the selection signal (SEL) is derived from the output signal (WRE) of the selection element ( 36 ).