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Titolo:
Radial and tangential tilt detection for rewritable optical disks
Autore:
Katayama, R; Meguro, S; Komatsu, Y; Yamanaka, Y;
Indirizzi:
NEC Corp Ltd, Funct Devices Res Labs, Miyamae Ku, Kawasaki, Kanagawa 2168555, Japan NEC Corp Ltd Kawasaki Kanagawa Japan 2168555 aki, Kanagawa 2168555, Japan
Titolo Testata:
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS
fascicolo: 3B, volume: 40, anno: 2001,
pagine: 1684 - 1693
SICI:
0021-4922(200103)40:3B<1684:RATTDF>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Keywords:
rewritable optical disk; disk tilt; radial; tangential; detection; high sensitivity; high-frequency servo operation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
6
Recensione:
Indirizzi per estratti:
Indirizzo: Katayama, R NEC Corp Ltd, Funct Devices Res Labs, Miyamae Ku, 1-1 Miyazaki4 Chome, Kawasaki, Kanagawa 2168555, Japan NEC Corp Ltd 1-1 Miyazaki 4 Chome Kawasaki Kanagawa Japan 2168555
Citazione:
R. Katayama et al., "Radial and tangential tilt detection for rewritable optical disks", JPN J A P 1, 40(3B), 2001, pp. 1684-1693

Abstract

In an optical disk system which uses a short wavelength laser diode and a high numerical aperture objective lens, it is necessary to detect and compensate for the disk tilt, because the coma aberration deteriorates the read/write characteristics and the tilt margin becomes narrower. This paper presents a new radial and tangential tilt detection method for rewritable optical disks, which is based on the intensity distribution of the reflected light from the disk. This method features high sensitivity (about 0.37/degreesfor radial direction and about 0.51/degrees for tangential direction) and is suitable for high-frequency servo operation. Moreover, it can be combined with the differential push-pull detection method and the land/groove detection method by using three beams. Experimental results have demonstrated the validity of this method.

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Documento generato il 02/10/20 alle ore 01:53:55