Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Isao Ichimura"'
Autor:
Hironobu Tanase, Gakuji Hashimoto, Tomomichi Tanaka, Takashi Nakao, Isao Ichimura, Kotaro Kurokawa, Kenji Yamamoto, Kiyoshi Osato
Publikováno v:
Japanese Journal of Applied Physics. 42:891-894
A liquid-crystal (LC) panel was integrated into a two-axis electromagnetic actuator in order to realize a dual-layer-compatible optical head for "Blu-ray Disc" systems. This head configuration can actively compensate the cover layer difference of up
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e77d99a61e8e5388f3406d29fa54f92
https://doi.org/10.1143/jjap.42.891
https://doi.org/10.1143/jjap.42.891
Autor:
Shin Masuhara, Koichiro Kishima, Kimihiro Saito, Isao Ichimura, Kenji Yamamoto, Atsushi Iida, Kiyoshi Osato, Yuji Kuroda
Publikováno v:
Japanese Journal of Applied Physics. 41:1894-1897
The possibility of an areal density over 50 Gbit/in2 was examined in near-field phase-change recording. The disk structure was optimized to maximize readout signals under the land-and-groove recording condition at a tracking pitch of 160 nm. We also
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd088333627f2127b2097d31a09b9ceb
https://doi.org/10.1143/jjap.41.1894
https://doi.org/10.1143/jjap.41.1894
Publikováno v:
Applied optics. 39(23)
Optical disk readout signals with a solid immersion lens (SIL) and the land-groove recording technique are calculated by use of a simplified vector-diffraction theory. In this method the full vector-diffraction theory is applied to calculate the diff
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a0cfee5bd4978d7a22bfb6d44fd3fd3
https://pubmed.ncbi.nlm.nih.gov/18349997
https://pubmed.ncbi.nlm.nih.gov/18349997
Publikováno v:
SPIE Proceedings.
High-density multilayer optical disc stor age was investigated by em ploying advanced signal pro cessing methods such as adaptive equalization and adaptive partial-response maximum-likelihood (PRML) detection. Preliminary experiments, recording on si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::930b68d2610df7e073e92995ccdf8530
https://doi.org/10.1117/12.685229
https://doi.org/10.1117/12.685229
Publikováno v:
MRS Proceedings. 803
We propose multi-layer near-field recording with using inner focus mode. The restricted conditions for multi-layer near-field recording are discussed from the viewpoint of both media structure and optical setup. One solution is presented for dual lay
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c214b833467fb91d84543f84f57ec58
https://doi.org/10.1557/proc-803-hh6.1
https://doi.org/10.1557/proc-803-hh6.1
Autor:
Koichiro Kishima, Isao Ichimura, Kenji Yamamoto, Kiyoshi Osato, Yuji Kuroda, Atsushi Iida, Kimihiro Saito
Publikováno v:
SPIE Proceedings.
We demonstrated near-field recording with the combination of a GaN laser diode and a 1.5 NA objective lens. The realized linear bit density was less than 90 nm (corresponding to the areal recording density over 40 Gbit/in/sup 2/) regardless of using
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d428fc4922a3c684682c85d63593312e
https://doi.org/10.1117/12.399331
https://doi.org/10.1117/12.399331
Publikováno v:
Joint International Symposium on Optical Memory and Optical Data Storage 1999.
Recently, solid immersion lenses (SILs) have yielded a great interest in near-field optical data storage. However, convincing data on areal recording density have yet to be reported. The difficulty is attributed to the fact that an air-bearing slider
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::320d9dc20c70bd7a50080f8eb9f69a89
https://doi.org/10.1117/12.997612
https://doi.org/10.1117/12.997612
Publikováno v:
Joint International Symposium on Optical Memory and Optical Data Storage 1999.
Both over 20 GB of capacity and higher data transfer rate more than 25 Mbps are required for the optical data storage in the era of digital broadcasting to record high-definition digital video stream.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e43616fbffe43ed9c6e100712782f456
https://doi.org/10.1117/12.997611
https://doi.org/10.1117/12.997611
Publikováno v:
Optical Data Storage '98.
Using a two-element objective lens, over 0.9 NA lens and long WD lens are demonstrated. Using a thin cover layer, problems for skew margin and thickness tolerance are solved. Using a red LD, a 0.85 NA lens and a 0.1 mm cover PC disk, 8 GB rewritable
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::12b5774881ce9c458023342b74797fc6
https://doi.org/10.1117/12.327931
https://doi.org/10.1117/12.327931
Publikováno v:
Optical Data Storage.
Recently, the capacity of an optical disk was increased up to 4.7 GB such as DVD with a demand of playing back a digital video. In order to record a digital video data more than 3 hours, the capacity of a rewritable disk is expected to exceed 10 GB.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf085990f9918c49fb99f7e49da8db54
https://doi.org/10.1364/ods.1998.wa.2
https://doi.org/10.1364/ods.1998.wa.2