An experimental procedure is given for measuring the distribution of light intensity reflected by materials commonly used in interiors. Measurements are carried out in the spectral domain, using a spectrophotometer as detector. They are restricted to the plane of incidence. Preliminary results for grazing incidence show that these materials do not generally behave as uniform diffusers. This conclusion could be important in lighting simulations where the Lambert law is always used extensively. The specular component tends to desaturate the colour of the sample.
Get full access to this article
View all access options for this article.
References
1.
Embrechts J.J.Modele de l'influence des parois sur la chromaticité du rayonnement lumineux en espace closLux1335-11 (1985)
2.
Embrechts J.J.The effect of walls on colour renderingLighting Res. Technol.17(3) 122-128 (1985)
3.
Embrechts J.J.Mesure goniophotométrique de la réflexion spectrale d'un échantillon de matériau plan (Liège: University Lighting Department) (1988)
4.
Radiometric and photometric characteristics of materials and their measurement CIE Publication 38 (Paris: Commission Internationale de l'Eclairage) (1977)
5.
Lekner J.Theory of reflection (Dordrecht: Martinus Nijhoff) p 205 (1987)
