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Design and characterization of a new absolute diffuse reflectance reference instrument at the NRC

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.1117/12.2322361
AuthorSearch for: 1; Search for: 1; Search for: 1
Affiliation
  1. National Research Council of Canada. Metrology Research Centre
FormatText, Article
ConferenceReflection, Scattering, and Diffraction from Surfaces VI, August 19-23, 2018, San Diego, California
Subjectoptical spheres; diffuse reflectance spectroscopy; integrating spheres; reflectivity; reflectometry
Abstract
Absolute diffuse reflectance measurements may be carried out by means of both integrating sphere and goniometer- based methods. At the National Research Council of Canada, the scale of absolute diffuse spectral reflectance is currently realized in the UV/VIS/NIR range using the modified Sharp-Little integrating sphere method. To ex- tend the wavelength range and improve instrument performance, a new absolute reflectometer facility is presently being constructed. The new system features a monochromator-based tunable light source, interchangeable detector systems (PMT, Si, and extended InGaAs) and a custom polytetrafluoroethylene integrating sphere. Aspects of the sphere aimed at mitigating the effects of sphere asymmetry and sample recess will be discussed. Data characterizing the wavelength scale, bandpass, and linearity of the new system will also be presented.
Publication date
PublisherSociety of Photo-Optical Instrumentation Engineers (SPIE)
In
  • Reflection, Scattering, and Diffraction from Surfaces VI, 107500G (4 September 2018): 1–8.
Series
  • Proceedings of SPIE 10750.
LanguageEnglish
Peer reviewedYes
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Record identifierc99c1bb7-b36e-4f6e-9791-72c591e90b52
Record created2021-08-27
Record modified2021-08-27
Date modified: