Spherical Aberration Error Detection for Blu-ray Disc Optical Pickups

Spherical Aberration Error Detection for Blu-ray Disc Optical Pickups

For a high-numerical-aperture (NA) optical pickup system, the spherical aberration (SA) caused by cover layer thickness error should be corrected. We detected the SA error signal using a newly designed hologram optical element (HOE). The HOE has both sufficient signal sensitivity and constant signal...

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Veröffentlicht in:Japanese Journal of Applied Physics 2006-07, Vol.45 (7R), p.5807
Hauptverfasser: Ogata, Nobuo, Kanazawa, Yasunori, Horiyama, Makoto, Nishioka, Sumito, Miyake, Takahiro, Nakata, Yasuo, Kurata, Yukio
Format: Artikel
Sprache:eng
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Zusammenfassung:For a high-numerical-aperture (NA) optical pickup system, the spherical aberration (SA) caused by cover layer thickness error should be corrected. We detected the SA error signal using a newly designed hologram optical element (HOE). The HOE has both sufficient signal sensitivity and constant signal level independent of objective lens shift. In addition, we fabricated on SA servo for a dual-layer Blu-ray disc.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.45.5807