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Multifocus optical pickup with diffractive optical elements

: Pawlowski, E.

Merkle, F. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.; European Optical Society -EOS-:
Design and Engineering of Optical Systems II, 1999 : 25 - 27 May 1999, Berlin, Germany
Bellingham/Wash.: SPIE, 1999 (SPIE Proceedings Series 3737)
ISBN: 0-8194-3211-3
Conference on Design and Engineering of Optical Systems <2, 1999, Berlin>
Fraunhofer HHI ()
diffractive optical elements; optical design techniques; optical disc storage; optical fabrication; optical focusing; optical images; pick-ups; multifocus optical pickup; does; key optical elements; optical design; doe-pickup; multi-focus imaging; data transfer rate; parallel reading; superimposed memory layers; optical performances; optical dvd-pickup

A novel optical pickup based on DOEs is proposed and first key optical elements are designed and fabricated. The DOE-pickup enables multi-focus imaging and speeds up the data transfer rate. Parallel reading of many tracks and two or more superimposed memory layers is possible. Our measurements revealed, that the efficiencies and the optical performances of the DOEs are suitable for the implementation in an optical DVD-pickup.