International round-robin experiment for angle-resolved light scattering measurement

An international round-robin experiment has been conducted to test procedures and methods for the measurement of angle-resolved light scattering. ASTM E2387-05 has been used as the main guide, while the experience gained should also contribute to the new ISO standard of angle-resolved scattering cur...

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Bibliographic Details
Published in:Applied optics (2004) 2019-08, Vol.58 (24), p.6638
Main Authors: von Finck, A, Herffurth, T, Duparré, A, Schröder, S, Lequime, M, Zerrad, M, Liukaityte, S, Amra, C, Achour, S, Chalony, M, Kuperman, Q, Cornil, Y, Bialek, A, Goodman, T, Greenwell, C, Gur, B, Brinkers, S, Otter, G, Vosteen, A, Stover, J, Vink, R, Deep, A, Doyle, D
Format: Article
Language:English
Subjects:
Design of experiments
Electromagnetism
Engineering Sciences
Gratings (spectra)
Light scattering
Measurement methods
Optics
Photonic
Physics
Scattering angle
Silicon dioxide
Substrates
Test procedures
Uncertainty
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Summary:An international round-robin experiment has been conducted to test procedures and methods for the measurement of angle-resolved light scattering. ASTM E2387-05 has been used as the main guide, while the experience gained should also contribute to the new ISO standard of angle-resolved scattering currently under development (ISO/WD 19986:2016). Seven laboratories from Europe and the United States measured the angle-resolved scattering from Al/SiO -coated substrates, transparent substrates, volume diffusors, quasi-volume diffusors, white calibration standards, and grating samples at laser wavelengths in the UV, VIS, and NIR spectra. Results were sent to Fraunhofer IOF, which coordinated the experiments and analyzed the data, while ESA-ESTEC, as the project donor, defined conditions and parameters. Depending mainly on the sample type, overall good to reasonable agreements were observed, with largest deviations at scattering angles very close to the specular beam. Volume diffusor characterization unexpectedly turned out to be challenging. Not all participants provided measurement uncertainty ranges according to the Guide to the Expression of Uncertainty in Measurement; often, a single general scatterometer-related measurement uncertainty value was stated. Although relative instrument measurement uncertainties close to 1% are sometimes claimed, the comparison results did not support these claims for specular scattering samples as mirrors, substrates, or gratings.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.58.006638