International round-robin experiment to test the International Organization for Standardization total-scattering draft standard
2000
An international round-robin experiment has been conducted among laboratories
in different countries to test the measurement and the data-analysis procedures in
the International Organization for Standardization draft standard ISO/DIS 13696 for
measuring total scattering from low-scatter laser optics. Ten laboratories measured
total backscattering from high-reflectance mirrors, 50% beam splitters, and
antireflection-coated windows. Results were sent to the Laser Zentrum Hannover,
which acted as coordinator and analyzed all the backscattering data. The results
showed that the procedure in the draft standard was useful for measuring and
reporting backscattering for low-scatter optics. Problems encountered in the
round-robin experiment included the accumulation of particles on the surfaces,
particularly on the high-reflectance mirrors.
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