| Zugriffsnummer | 43567 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Spatially Resolved Measurements of Diffuse Reflectance |
| Autor(in); Institution |
Basic, Nina; METAS, Bern, SWITZERLAND
Blattner, Peter; METAS, Bern, SWITZERLAND
Pastuschek, Marcel; 4.5, Angewandte Radiometrie, PTB-Braunschweig
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| Quelle/Jahr | Proceedings of the 29th CIE Session Washington D.C., USA, June 14-22, 2019:(2019), 1113 - 1122 |
| Artikelnummer | PO063 |
| DOI | |
| Konferenzangaben | 29th Quadrennial Session of the CIE, Washington, DC, 14-22, June, 2019, USA |
| Freie Schlagworte | Diffuse Reflectance ; Gloss ; Graininess |
| Zusammenfassung | Diffuse reflectance measurements are usually performed using a single photodetector. However graininess measurements require also spatial resolution, thus the measurements are performed using a radiometric camera attached to the integrating sphere in the measurement geometry d:0°. When performing such measurements on glossy samples, an interesting phenomenon was observed; a dark area corresponding to the specular excluded area. METAS and PTB have performed a systematic study on a set of samples having different values of gloss, lightness, and colour, using two different measurement setups. It was found that the size of the dark area could be calculated using geometric relations of the measurement setup. Furthermore, the luminance factor of the dark area, compared to its surround can be correlated with the gloss value of the sample; the glossier the sample, the greater the difference between the dark area and its surround. |
| Themenbereich der Metrologie | Photometrie und Radiometrie |