Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Fumisada Maeda"'
Publikováno v:
2000 Optical Data Storage. Conference Digest (Cat. No.00TH8491).
We have developed an optical disk system whose storage capacity and data transfer rate are 22 GB and 35 Mbps, respectively, by using a proto-type pickup with a GaN laser diode as a light source. Measured jitter value of 8.1% at the areal recording de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::62b4d1dd8e561df46b9b435914a0851a
https://doi.org/10.1109/ods.2000.847966
https://doi.org/10.1109/ods.2000.847966
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
Autor:
Fumisada Maeda, Kiyoshi Osato, Isao Ichimura, Kenji Yamamoto, Atsushi Fukumoto, Toshio Watanabe, Mitsuo Naito, Shin Masuhara
Publikováno v:
Joint International Symposium on Optical Memory and Optical Data Storage.
The areal density of an optical storage disk can be increased by improving the transverse resolution of the optical head which is proportional to λ/NA. In order to improve the resolution, a lot of research has been carried out to develop shorter wav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::90eded63ce1b38a4f5aba5676e8b1201
https://doi.org/10.1364/isom.1996.ofa.1
https://doi.org/10.1364/isom.1996.ofa.1
Publikováno v:
Joint International Symposium on Optical Memory and Optical Data Storage.
To improve the resolution of an optical pick-up, it is desirable to decrease the wavelength or to increase the numerical aperture (NA) because the spot size is determined by diffraction to be approximately λ/NA, where λ, is the free space wavelengt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::60ea6f341eaba97147218df41981daee
https://doi.org/10.1364/isom.1996.ofa.2
https://doi.org/10.1364/isom.1996.ofa.2
Publikováno v:
SPIE Proceedings.
A solid immersion lens (SIL) attached to a conventional objective could multiply the effective numerical aperture of an optical pick-up by a factor of refractive index n. A truncated hemispherical SIL (n equals 1.5) mounted on a slider, which was des
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f2bf8dab2361c99814947967d50508e
https://doi.org/10.1117/12.218721
https://doi.org/10.1117/12.218721
Publikováno v:
Compact Blue-Green Lasers.
Diode-pumped intracavity frequency doubled Nd:YAG lasers have been intensively investigated. Low noise characteristics of such a laser as well as its shorter wavelength than conventional laser diodes are attractive features for the higher density opt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d12e6c52c30463b1667df74de7c86d12
https://doi.org/10.1364/cbgl.1992.fa3
https://doi.org/10.1364/cbgl.1992.fa3
Publikováno v:
SPIE Proceedings.
We have developed a direct overwriting system using light intensity modulation on a 5.25-inch triple-layer disk with a capacity of 650 MB. The system has a magnet assembly which can provide the initializing magnetic field effectively without affectin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36dbbf05d064125d4c8b73a39c19360e
https://doi.org/10.1117/12.45916
https://doi.org/10.1117/12.45916
Publikováno v:
Japanese Journal of Applied Physics. 39:937
The combination of a GaN laser diode and a 0.85 numerical aperture objective has achieved an optical storage capacity of over 22 GB. Owing to sufficient modulation ability and low-noise characteristics, GaN semiconductor lasers possess adequate quali
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66782e25c830327dacc1c2540e2fa8a5
https://doi.org/10.1143/jjap.39.937
https://doi.org/10.1143/jjap.39.937