Spherical Aberration Detection Scheme for Optical Pickup Units Using the Push-Pull Signal

Spherical Aberration Detection Scheme for Optical Pickup Units Using the Push-Pull Signal

We present a new method to generate a spherical aberration error (SAE) signal for an optical pickup unit. The SAE signal is derived from two push-pull signals that are generated by a special diffractive optical element. First experiments provided a proof of principle.

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Veröffentlicht in:Japanese Journal of Applied Physics 2004-07, Vol.43 (7S), p.4832
Hauptverfasser: Knittel, Joachim, Richter, Hartmut
Format: Artikel
Sprache:eng
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Zusammenfassung:We present a new method to generate a spherical aberration error (SAE) signal for an optical pickup unit. The SAE signal is derived from two push-pull signals that are generated by a special diffractive optical element. First experiments provided a proof of principle.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.43.4832