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

Réjean Baribeau | Zendy; Joanne C. Zwinkels | Zendy

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

Author(s) -

Réjean Baribeau,

Joanne C. Zwinkels

Publication year - 2012

Publication title -

proceedings of spie, the international society for optical engineering/proceedings of spie

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.192

H-Index - 176

eISSN - 1996-756X

pISSN - 0277-786X

DOI - 10.1117/12.930794

Subject(s) - integrating sphere , goniometer , diffuse reflection , optics , spectroradiometer , reflectivity , linearity , reflection (computer programming) , materials science , diode , light emitting diode , physics , computer science , optoelectronics , quantum mechanics , programming language

At 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.Peer reviewed: YesNRC publication: Ye

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