Premastered Optical Disk by Superresolution Using Rear Aperture Detection

Autor:	Atsushi Fukumoto, Kouichi Yasuda, Yutaka Kasami, Masahiko Kaneko, Masumi Ono
Rok vydání:	1996
Předmět:	Read-only memory Linear density Physics business.industry Chalcogenide General Engineering General Physics and Astronomy Superresolution Skew angle Track density chemistry.chemical_compound Optics chemistry business Pitch tracking Optical disc
Zdroj:	Japanese Journal of Applied Physics. 35:423
ISSN:	1347-4065 0021-4922
DOI:	10.1143/jjap.35.423
Popis:	Premastered optical disk by superresolution (PSR) using rear aperture detection (RAD) has been realized. The PSR disk has a chalcogenide material. Using PSR by RAD with a current CD system, we demonstrated the feasibility of increasing both the linear density and the track density of read only memory (ROM) optical disks. By superresolution in the linear direction, a high C/N of 47 dB was obtained for a pit length of 0.3 µm which is beyond the optical limit. Furthermore, by superresolution in the track direction, a low crosstalk of -38 dB and a wider margin of radial skew angle compared to conventional detection were obtained for a track pitch of 1.1 µm.
Databáze:	OpenAIRE
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