Comparison of NRC goniometric and integrating sphere methods for realizing an absolute diffuse reflectance scale

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Proceedings titleReflection, Scattering, and Diffraction from Surfaces III
Series titleProceedings of SPIE; Volume 8495
ConferenceRlection, Scattering, and Diffraction from Surfaces III, 13-16 August 2012, San Diego, California, USA
Article number8495-10
Pages84950A-184950A-10; # of pages: 10
Subjectdiffuse reflectance; BRDF; goniometric method; sphere method; uncertainty
AbstractAt the National Research Council of Canada (NRC), the scale of diffuse spectral reflectance in the UV and visible range is realized using an integrating sphere method known as the Modified Sharp-Little method and has been wellcharacterized and validated. More recently, a gonioreflectometer has been designed to capture the bidirectional reflectance of reflecting objects. This system incorporates a diode-array spectroradiometer and is prone to non-linearity errors. In this paper the magnitude of this non-linearity error is evaluated using several diffusely reflecting materials by comparing the angular-integrated reflection indicatrix measured with the gonioreflectometer with results obtained using a transfer spectrophotometer that is traceable to the sphere-based NRC Absolute Reflectometer.
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PublisherSPIE--the International Society for Optical Engineering
AffiliationMeasurement Science and Standards; National Research Council Canada
Peer reviewedYes
NPARC number21196171
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Record identifiered9dde53-9ea6-47ed-8875-cfcc993a8640
Record created2013-01-15
Record modified2017-09-13
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