Searched for: subject%3A%22Photometry%22
(1 - 12 of 12)
document
Meisner, J.A. (author), Jaffe, W.J. (author), le Poole, R.S. (author)
The NOVA Fringe Tracker (NFT) is a proposed solution tóthe call by ESO for a second generation fringe tracking facility. This instrument at the VLTI will enable the cophasing of up tó6 telescopes simultaneously. Using broad band optics with detection from 1.2 tó2.4 microns, a unique configuration is employed that eliminates so-called ...
conference paper 2012
document
Court, A.J. (author), TNO Industrie en Techniek (author)
The Atmospheric-Space Interactions Monitor (ASIM) consists of a suite of instruments to make observations of Transient Luminous Events (TLEs) and Terrestrial Gamma-ray Flashes (TGFs). The optical part of the payload is called the Multi-Spectral Modular Imaging Array (MMIA) and consists of a combination of a camera units and photometers. The...
conference paper 2009
document
Kusmierczyk-Michulec, J. (author), van Eijk, A.M.J. (author), Moerman, M.M. (author), Cohen, L.H. (author), de Jong, A.N. (author), Fritz, P. (author), TNO Defensie en Veiligheid (author)
Atmospheric aerosol particles affect the Earth's radiative balance both in the cloud-free and the cloudy atmosphere. The direct effect of aerosols is related with scattering and absorption of solar radiation, and as a consequence, reduction of the amount of radiation reaching the surface. The best parameter that quantifies this effect is the...
conference paper 2008
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Alferdinck, J.W.A.M. (author), Janssen, E.G.O.N. (author), Zonneveldt, L. (author), Ruigrok, J. (author), TNO Defensie en Veiligheid (author)
many greenhouses use artificial light to grow plants. Part of this light escapes, scatters in the sky and causes sky glow. Residents in the vicinity complain about the absence of natural darkness. A light scatter model is developed in order to quantify the dose of the sky glow. The luminance of the sky glow and the illuminance due to the air...
conference paper 2006
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Fotios, S.A. (author), Eloholma, M. (author), Viikari, M. (author), Halonen, L. (author), Walkey, H. (author), Goodman, T. (author), Alferdinck, J.W.A.M. (author), Freiding, A. (author), Bodrogi, P. (author), Várady, G. (author)
A previous work summarized the history of the measurement of visual sensitivity to identify the problems inherent in mesopic photometry. The authors stated that in practical lighting applicatons, the detection and recognition of visual objects at or near visual threshold, and the reaction time needed to perceive objects in the visual field, are...
article 2005
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Eloholma, M. (author), Liesiö, M. (author), Halonen, L. (author), Walkey, H. (author), Goodman, T. (author), Alferdinck, J.W.A.M. (author), Frieding, A. (author), Schanda, J. (author), Bodrogi, P. (author), Várady, G. (author), TNO Defensie en Veiligheid (author)
At present, suitable methods to evaluate the visual effectiveness of lighting products in the mesopic region are not available. The majority of spectral luminous efficiency functions obtained to date in the mesopic range have been acquired by heterochromatic brightness matching. However, the most recent studies in the mesopic field have adopted...
article 2005
document
Hooijschuur, E.W.J. (author), Kientz, C.E. (author), Dijksman, J. (author), Brinkman, U.A.T. (author)
The potential of microcolumn liquid chromatography (μLC) and capillary electrophoresis (CE) with on-line, flame photometric detection (FPD)in the P-selective mode has been studied for determination of polar P-containing pesticides, glyphosate and its main metabolite, aminomethylphosphonic acid (AMPA), ethephon, fosetyl-aluminium and acephate....
article 2001
document
Hooijschuur, E.W.J. (author), Kientz, C.E. (author), Brinkman, U.A.T. (author)
Microcolumn liquid chromatography with gradient elution and on-line flame photometric detection has been used for the selective and rapid determination of non-volatile alkylphosphonic acids, which are hydrolysis products of nerve agents, in aqueous samples. A make-up of water was used to maintain stable introduction of the eluent during a...
article 2001
document
Hooijschuur, E.W.J. (author), Kientz, C.E. (author), Hulst, A.G. (author), Brinkman, U.A.T. (author), Prins Maurits Laboratorium TNO (author)
On-line coupling of reversed-phase microcolumn liquid chromatography (micro-RPLC) and sulfur-selective flame photometric detection (S-FPD) was studied for the selective and direct determination of thiodiglycol, bis(2- hydroxyethylthio)methane, 1,2-bis(2-hydroxyethylthio)ethane, 1,3-bis(2- hydroxyethylthio)propane, and 1,4-bis(2-hydroxyethylthio...
article 2000
document
Hooijschuur, E.W.J. (author), Kientz, C.E. (author), Brinkman, U.A.T. (author), TNO Prins Maurits Laboratorium (author)
A selective, direct and relatively rapid method has been developed for the determination of thiodiglycol (TDG) in aqueous samples. TDG is the main hydrolysis product of the chemical warfare agent sulfur mustard. The method of analysis is based on the on-line coupling of reversed-phase microcolumn liquid chromatography and sulfur-selective flame...
article 1999
document
Sänger-van de Griend, C.E. (author), Kientz, C.E. (author), Brinkman, U.A.T. (author)
Preliminary work indicates that capillary electrophoresis can be coupled on-line with a gas chromatographic detector such as a flame photometric detector. A test mixture containing low-nanogram amounts of three organophosphorus compounds has successfully been analysed. Chemicals/CAS: methylphosphonic acid, 993-13-5; phosphoric acid, 7664-38-2;...
article 1994
document
Vos, J.J. (author), Estevez, O. (author), Walraven, P.L. (author), Instituut voor Zintuigfysiologie TNO (author)
New action spectra are derived for the foveal cones on the basis of three assumptions: (1) the Stiles-Burch (1959) colorimetric data are better than CIE 1931; (2) the long wavelength flanks of the dichromatic luminosity functions offer better anchorage than the confusion loci; and (3) the relative mutual heights per receptor can be derived from...
article 1990
Searched for: subject%3A%22Photometry%22
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