where the normal and diffuse reflection
of the absorber are now being considered ([[sigma].
In the case of polymer films, there is a variation in reflection due to the roughness of the surface that scatters the incident light in all directions, causing the reduction of intensity in the specular direction and an increase in diffuse reflection
These conditions are written as -15/15 for specular reflection and -15/60 for diffuse reflection
5m and a diffuse reflection
scanner with background suppression.
This surface is designed to give uniformly diffuse reflection
so that any light entering the sphere is uniformly distributed over the entire inner surface, eliminating any directional effects.
Other mid-infrared sampling methods that have been used to examine coatings include transmission spectroscopy of material abraded from a surface, emission spectroscopy, and the more recently applied methods of photoacoustic and diffuse reflection
Compatibility with leading fiber optic probe manufacturers means a wide range of diffuse reflection
, transflection, and transmission sample interfaces are available for almost any sample process.