Establishment of 2π total spectral radiant flux scale with a broadband LED-based transfer standard source

Metrologia ◽  
2020 ◽  
Vol 57 (6) ◽  
pp. 065024
Author(s):  
Yuri Nakazawa ◽  
Kenji Godo ◽  
Kazuki Niwa ◽  
Tatsuya Zama ◽  
Yoshiki Yamaji ◽  
...  
Keyword(s):  
Radiant Flux ◽  
Transfer Standard ◽  
Standard Source

scholarly journals High current hollow cathode as a radiometric transfer standard source for the extreme vacuum ultraviolet

1988 ◽  
Vol 27 (23) ◽  
pp. 4947 ◽  
Author(s):  
Karsten Danzmann ◽  
Mathias Günther ◽  
Joachim Fischer ◽  
Manfred Kock ◽  
Michael Kühne
Keyword(s):  
Hollow Cathode ◽  
Vacuum Ultraviolet ◽  
High Current ◽  
Transfer Standard ◽  
Standard Source

Long-term performance of a transfer standard pyrometer

Measurement ◽  
1990 ◽  
Vol 8 (1) ◽  
pp. 21-30
Author(s):  
G.C. Bussolino ◽  
F. Righini ◽  
A. Rosso
Keyword(s):  
Transfer Standard ◽  
Long Term Performance ◽  
Term Performance

Alanine-EPR as a transfer standard dosimetry system for low energy X radiation

2015 ◽  
Vol 116 ◽  
pp. 147-150 ◽  
Author(s):  
H.J. Khoury ◽  
E.J. da Silva ◽  
K. Mehta ◽  
V.S. de Barros ◽  
V.K. Asfora ◽  
...  
Keyword(s):  
Low Energy ◽  
Transfer Standard ◽  
Dosimetry System

Obtainable Method of Measuring the Solar Radiant Flux Based on Silicone Photodiode Element

2016 ◽  
Vol 824 ◽  
pp. 477-484 ◽  
Author(s):  
Miroslav Čekon ◽  
Richard Slávik ◽  
Peter Juras
Keyword(s):  
Solar Radiation ◽  
Solar Irradiance ◽  
Climate Science ◽  
Radiant Flux ◽  
Silicon Photodiode ◽  
Building Science ◽  
Solar Instruments ◽  
Solar Radiation Exposure ◽  
Building Physics

Solar radiation exposure and its monitoring does have not only the importance for climate science and meteorology however is equally of highly relevant use for the field of Building Science as primarily those of analyzing thermal aspects in building physics. Here the measuring of solar irradiance by means of well-established solar instruments can be applied whose advances have been undergoing steep progress. Currently, a silicon photodiode element, as a truly obtainable form, may have a feasible exploitation in the field of building applications concerning the solar radiant flux quantifying. It represents a small optoelectronic element and has a several exploitable advantages. The paper presents a perspective alternative to monitor solar irradiance. Own measurement assembly is proposed and introduced. Initial in-situ measurements are performed and final comparability with existing commercial solar instruments is presented. An obtained correlation with existing types demonstrates its applicability to the field of building science and solar energy.

A comparison of traceable spatial angle autocollimator calibrations performed by PTB and VTT MIKES

Metrologia ◽  
2021 ◽  
Author(s):  
Ralf D Geckeler ◽  
Matthias Schumann ◽  
Andreas Just ◽  
Michael Krause ◽  
Antti Lassila ◽  
...  
Keyword(s):  
Broad Spectrum ◽  
Measurement Errors ◽  
Systematic Measurement ◽  
Motivating Factors ◽  
Optical Surface ◽  
Transfer Standard ◽  
Surface Normal ◽  
National Metrology Institutes ◽  
Wide Range ◽  
The Creation

Abstract Autocollimators are versatile devices for angle metrology used in a wide range of applications in engineering and manufacturing. A modern electronic autocollimator generally features two measuring axes and can thus fully determine the surface normal of an optical surface relative to it in space. Until recently, however, the calibration capabilities of the national metrology institutes were limited to plane angles. Although it was possible to calibrate both measuring axes independently of each other, it was not feasible to determine their crosstalk if angular deflections were present in both axes simultaneously. To expand autocollimator calibrations from plane angles to spatial angles, PTB and VTT MIKES have created dedicated calibration devices which are based on different measurement principles and accomplish the task of measurand traceability in different ways. Comparing calibrations of a transfer standard makes it possible to detect systematic measurement errors of the two devices and to evaluate the validity of their uncertainty budgets. The importance of measurand traceability via calibration for a broad spectrum of autocollimator applications is one of the motivating factors behind the creation of both devices and for this comparison of the calibration capabilities of the two national metrology institutes. The latter is the focus of the work presented here.

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