Zobrazeno 1 - 10
of 22
pro vyhledávání: '"N J Harrison"'
Publikováno v:
Optics Communications. 270:262-272
The diffuse and regular reflectances of five optically absorbing coatings frequently used in optical systems, were measured over the 0.32–14.3 μm wavelength range, before and after exposure to heat and intense optical radiation. The measured coati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::57c8582082d24a227dc0f3f5e7e201ae
https://doi.org/10.1016/j.optcom.2006.08.038
https://doi.org/10.1016/j.optcom.2006.08.038
Publikováno v:
Metrologia. 43:S98-S104
The CCPR K1-a key comparison of spectral irradiance (from 250 nm to 2500 nm) was carried out to meet the requirements of the Mutual Recognition Arrangement by 13 participating national metrology institutes. Because of the fragile nature of the tungst
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e1bf27bb0d7ba02175f6d4584039b022
https://doi.org/10.1088/0026-1394/43/2/s20
https://doi.org/10.1088/0026-1394/43/2/s20
Autor:
M. L. Samoylov, N J Harrison, B. Khlevnoy, Joachim Seidel, David F. Pollard, R Friedrich, S. A. Ogarev, Nigel Fox, V I Sapritsky, L J Rogers, P. Sperfeld, R I Stolyarevskaya, J rgen Metzdorf, V B. Khromchenko, Joachim Fischer
Publikováno v:
Metrologia. 40:S39-S44
An intercomparison of radiation temperature measurements was performed at VNIIOFI during October 2000 using a pyrolytic graphite blackbody operating over the temperature range from 1600?K to 3300?K. A pyrometer and two photometers from VNIIOFI, a pyr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2acff2037dccb208e91f2f8696b15e7e
https://doi.org/10.1088/0026-1394/40/1/310
https://doi.org/10.1088/0026-1394/40/1/310
Publikováno v:
Metrologia. 40:S50-S54
Narrow-band filter radiometers at 248?nm, 313?nm, 330?nm and 368?nm wavelengths were used to compare calibration facilities of spectral (irradiance) responsivity at HUT, NPL and BNM?INM. The results are partly in agreement within the stated uncertain
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4262ee7bd174edbf995317d2b9a2b14e
https://doi.org/10.1088/0026-1394/40/1/312
https://doi.org/10.1088/0026-1394/40/1/312
Publikováno v:
Metrologia. 37:453-456
The performance of spectral irradiance transfer-standard lamps has long been a concern in the radiometry and photometry communities. The adoption of a modified FEL-type lamp has recently been proposed as the most suitable transfer standard for spectr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ae199c624ca2c3823e4dbe203e4d331
https://doi.org/10.1088/0026-1394/37/5/24
https://doi.org/10.1088/0026-1394/37/5/24
Publikováno v:
Metrologia. 37:473-476
The design of a new detector-stabilized spectral irradiance source is presented, together with an evaluation of its performance. This new source consists of a tungsten-halogen lamp that is current-controlled using feedback from an array of filtered p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::357e690228675825f094c642aaba9d68
https://doi.org/10.1088/0026-1394/37/5/28
https://doi.org/10.1088/0026-1394/37/5/28
Publikováno v:
Metrologia. 37:501-504
A new ultra-high-temperature black body designed and constructed at the All-Russian Research Institute for Optophysical Measurements (VNIIOFI, Russian Federation) has recently been delivered to the National Physical Laboratory (NPL, UK). The black-bo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4acfc2a3e32bc640cfc5cc17752a2e5d
https://doi.org/10.1088/0026-1394/37/5/35
https://doi.org/10.1088/0026-1394/37/5/35
Autor:
S N Mekhontsev, R I Stolyarevskaya, V I Shapoval, B. Khlevnoy, Nigel Fox, P. Sperfeld, N J Harrison, V B. Khromchenko, V I Sapritsky, M F Zelener, J Metzdorf
Publikováno v:
Metrologia. 35:283-288
A series of black-body radiation-temperature measurements has been made over the temperature range 1380 K to 3100 K using two different designs of pyrolytic-graphite black bodies with calculated emissivities of 0.999. All measurements were performed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2281f06d88968fece44517bf4b1b3bc0
https://doi.org/10.1088/0026-1394/35/4/12
https://doi.org/10.1088/0026-1394/35/4/12
Publikováno v:
Metrologia. 35:461-464
One of the major uncertainties associated with radiance and irradiance measurements stems from the aperture system and a knowledge of the aperture area. High-quality apertures, with a roundness of 0.1 µm, can now be manufactured by diamond-turning t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::913cad9c7f8945d44c5861304ab5e89a
https://doi.org/10.1088/0026-1394/35/4/43
https://doi.org/10.1088/0026-1394/35/4/43
Autor:
B. Khlevnoy, V I Shapoval, P. Sperfeld, N J Harrison, S N Mekhontsev, Nigel Fox, J Metzdorf, V I Sapritsky, M F Zelener, V B. Khromchenko
Publikováno v:
Metrologia. 35:419-422
During an international comparison of radiation temperature measurements performed at the AllRussian Institute for Optophysical Measurements (VNIIOFI), Moscow, in June 1997 by participants from the VNIIOFI, the National Physical Laboratory (NPL), Ted
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9f05f2177d81fd4a515f83e0658cdbf1
https://doi.org/10.1088/0026-1394/35/4/34
https://doi.org/10.1088/0026-1394/35/4/34