Zobrazeno 1 - 10
of 17
pro vyhledávání: '"H Darnedde"'
Autor:
J. M. Chartier, H. Darnedde, Y. Millerioux, A. Chartier, H Piree, B. Vaucher, M. Mar Pérez, Han Haitjema, E. Prieto, F. Bertinetto, Sfcl Serge Wetzels, W. R. C. Rowley
Publikováno v:
Metrologia. 34:301-307
This paper reports the fourth set of results of a series of grouped laser comparisons from national laboratories undertaken by the Bureau International des Poids et Mesures (BIPM) at the request of the Comite Consultatif pour la Definition du Metre (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f80409c072427509de95dc6579e65a5b
https://doi.org/10.1088/0026-1394/34/4/2
https://doi.org/10.1088/0026-1394/34/4/2
Publikováno v:
Metrologia. 32:301-310
A detailed description of the He-Ne/127I2 laser wavelength standards developed at the National Metrology Institute of Turkey (UME), using high-frequency modulation and featuring a long-term relative instability of a few parts in 1014, is presented. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cddeafcdbad2f6b150c59502b0fd88d0
https://doi.org/10.1088/0026-1394/32/4/7
https://doi.org/10.1088/0026-1394/32/4/7
Autor:
H Darnedde
Publikováno v:
Metrologia. 29:349-359
The calibration of long gauge blocks of up to 1 m using the vacuum wavelength comparator according to Kosters, and three laser wavelength standards recommended by the CIPM, is described. The relative uncertainty of this calibration is shown to be as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e7338319d046f8b799aabbc761ea7d3e
https://doi.org/10.1088/0026-1394/29/5/005
https://doi.org/10.1088/0026-1394/29/5/005
Autor:
J. M. Chartier, J. Hu, P. S. Ramanujam, U. Karn, M. Frennberg, Fritz Riehle, B. Ståhlberg, H Darnedde, Leslie Pendrill, O. Poulsen, Jan C. Petersen, H. Wahlgren, Jes Henningsen, Lennart Robertsson
Publikováno v:
Metrologia. 29:331-339
An international comparison of 127I2 He-Ne stabilized lasers, used as length standards, has been made. Five laboratories from Sweden, Denmark (two laboratories), Finland and Germany were represented. In addition, two lasers from the Bureau Internatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc09ebf96abf272fbdd0579ab8c15580
https://doi.org/10.1088/0026-1394/29/5/003
https://doi.org/10.1088/0026-1394/29/5/003
Publikováno v:
Metrologia. 27:19-23
The frequencies of six iodine-stabilized He-Ne-lasers developed at the UPT have been compared with one of the PTB lasers. The lasers were operated at λ = 633 nm. Their frequencies were stabilized to the line centres of hyperfine structure (hfs) comp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::586021605a360f4baadab7950839c06e
https://doi.org/10.1088/0026-1394/27/1/005
https://doi.org/10.1088/0026-1394/27/1/005
Publikováno v:
Proceedings of 20th Biennial Conference on Precision Electromagnetic Measurements.
The wavelength standards at 633 nm and 657 nm in the visible part of the spectrum are characterized by most accurate frequency values obtained by frequency chain measurements. A cross check has been performed by an interferometric wavelength comparis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::72399ad7ad453a5892adfae2b0767cc1
https://doi.org/10.1109/cpem.1996.546771
https://doi.org/10.1109/cpem.1996.546771
Publikováno v:
Proceedings of 20th Biennial Conference on Precision Electromagnetic Measurements.
Accurately known values of material properties for single crystals of silicon are necessary, to apply corrections in a planned high precision determination of Avogadro's constant. Measurements of the coefficient of thermal expansion and of the compre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f2918cd54b1e04b27bd7296071b0296d
https://doi.org/10.1109/cpem.1996.547171
https://doi.org/10.1109/cpem.1996.547171
Publikováno v:
Metrologia. 21:49-57
"Zerodur", a glass ceramic, has been developed in order to have a material with an extremely small thermal expansion coefficient. The known physical properties are completed here by results on dimensional stability compiled over a number of years. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::334dd428c4590f626c230a3ce7e3e19c
https://doi.org/10.1088/0026-1394/21/2/002
https://doi.org/10.1088/0026-1394/21/2/002
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