Premastered Optical Disk by Superresolution

Autor:	Kouichi Yasuda, Masumi Ono, Katsuhisa Aratani, Atsushi Fukumoto Atsushi Fukumoto, Masahiko Kaneko Masahiko Kaneko
Rok vydání:	1993
Předmět:	Physics business.industry General Engineering General Physics and Astronomy Nonlinear optics Cutoff frequency Crystal Optics Eye pattern Contrast ratio business Image resolution Optical disc Refractive index
Zdroj:	Japanese Journal of Applied Physics. 32:5210
ISSN:	1347-4065 0021-4922
DOI:	10.1143/jjap.32.5210
Popis:	Premastered optical disk by superresolution (PSR) for practical use has been achieved for the first time. The PSR disk has a phase-change material Ge2Sb2Te5 with stoichiometric composition. Superresolution results from a high contrast ratio of reflectance in the light spot between highly reflective crystal region and lowly reflective melted region. A high C/N ratio of 56 dB is obtained at a pit length of 0.4 µm using PSR. The C/N ratio is still as high as 50 dB for a pit length of 0.3 µm. The PSR disk with double linear densities of current CD is successfully read out with a clear eye pattern and a low error rate using current optics.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d996cb58005fae2c7d8134ff5ec878a6 https://doi.org/10.1143/jjap.32.5210 Zobrazit plný text záznamu