Zobrazeno 1 - 10
of 263
pro vyhledávání: '"Hajime INABA"'
Autor:
Naoki Kuramoto, Shigeki Mizushima, Lulu Zhang, Kazuaki Fujita, Yuichi Ota, Sho Okubo, Hajime Inaba
Publikováno v:
Measurement: Sensors, Vol 18, Iss , Pp 100091- (2021)
The new definition of the kilogram was implemented on May 20, 2019. The kilogram is presently defined by the Planck constant. On the basis of the new definition, the kilogram will be realized at the National Metrology Institute of Japan by the X-ray
Externí odkaz:
https://doaj.org/article/060ea87b404641edb90c0fc0311dfbef
Autor:
Takeo Minamikawa, Yi-Da Hsieh, Kyuki Shibuya, Eiji Hase, Yoshiki Kaneoka, Sho Okubo, Hajime Inaba, Yasuhiro Mizutani, Hirotsugu Yamamoto, Tetsuo Iwata, Takeshi Yasui
Publikováno v:
Nature Communications, Vol 8, Iss 1, Pp 1-8 (2017)
Spectroscopic ellipsometry is an established technique to characterize the optical properties of a material. Here, Minamikawa et al. combine the method with dual-comb spectroscopy, which allows them to obtain ellipsometric parameters including the ph
Externí odkaz:
https://doaj.org/article/7fcd52efe6c74660aeab3f177ff0c8ad
Publikováno v:
Precision Engineering. 70:135-144
We proposed a new primary calibration method of a laser Doppler vibrometer (LDV) using the optical modulated excitation of an electro-optical modulator and validated this approach by comparing mechanical modulated excitation with homodyne laser inter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::edcef8a6d3a6f282bc1e4abb884a85d7
https://doi.org/10.1016/j.precisioneng.2021.01.016
https://doi.org/10.1016/j.precisioneng.2021.01.016
Autor:
Shigeki Mizushima, Lulu Zhang, Naoki Kuramoto, Hajime Inaba, Kazuaki Fujita, Yuichi Ota, Sho Okubo
Publikováno v:
MAPAN. 35:491-498
The new definition of the kilogram was implemented on May 20, 2019. The kilogram is presently defined by a fixed value of the Planck constant. On the basis of the new definition, the kilogram will be realized at the National Metrology Institute of Ja
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b76a44765038047f64e968859a582e47
https://doi.org/10.1007/s12647-020-00393-2
https://doi.org/10.1007/s12647-020-00393-2
Autor:
Takumi Kobayashi, Akifumi Takamizawa, Daisuke Akamatsu, Akio Kawasaki, Akiko Nishiyama, Kazumoto Hosaka, Yusuke Hisai, Masato Wada, Hajime Inaba, Takehiko Tanabe, Masami Yasuda
We search for ultralight scalar dark matter candidates that induce oscillations of the fine structure constant, the electron and quark masses, and the quantum chromodynamics energy scale with frequency comparison data between a ^{171}Yb optical latti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b311c9942444caeac0469e26d6ac04e8
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 68:1913-1920
For a determination of the Avogadro constant by the X-ray crystal density method, the volume of a Si sphere manufactured from a Si crystal isotopically enriched in 28Si, named Si28-23Pr11, was measured at the National Metrology Institute of Japan (NM
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4dec8f79b4133f817cfed6b097236326
https://doi.org/10.1109/tim.2018.2878072
https://doi.org/10.1109/tim.2018.2878072
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 68:2246-2252
Phase noise induced by environmental disturbance was greatly reduced when the optical fiber was installed in an ultrastable environment. In this paper, the optical fiber length was 10 m, and the reduction in the phase noise power spectral density was
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd01fcb54f781b24922e5b5ad7746f16
https://doi.org/10.1109/tim.2018.2876052
https://doi.org/10.1109/tim.2018.2876052
Autor:
Hajime Inaba, Masato Wada
Publikováno v:
Metrologia. 59:065005
The International System of Units (SI) definition of the ‘second’ is likely to be redefined in the optical frequency region in the near future. Therefore, uncertainty reduction in the frequency link between 10 MHz, which is used in the frequency
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c8718c3bea53f4415934367cff073226
https://doi.org/10.1088/1681-7575/ac938d
https://doi.org/10.1088/1681-7575/ac938d
Publikováno v:
Proceedings of the 2021 International Symposium on Molecular Spectroscopy.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75b1d0bf56e2b3a8c1ae159b1983cab9
https://doi.org/10.15278/isms.2021.wi12
https://doi.org/10.15278/isms.2021.wi12
Publikováno v:
Physical Review A. 103
We carry out infrared-infrared double-resonance spectroscopy of the $2{\ensuremath{\nu}}_{3}{A}_{1}\text{\ensuremath{-}}{\ensuremath{\nu}}_{3}$ band of methane. Ten transitions of Q(1) to Q(4) are observed with an 88.5-THz difference-frequency-genera
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::57c5316d9be265c24f78ca331f7aa80b
https://doi.org/10.1103/physreva.103.022809
https://doi.org/10.1103/physreva.103.022809