Glossary
- Diffusion: phenomenon by which a radiation is deflected in various directions by interaction with other objects
- Integrating sphere: spherical cavity with a white and uniformly diffusing coating and therefore behaving as a lambertian diffuser
- Lambertian diffuser: surface diffusing light uniformely whichever the direction and therefore behaving as a lambertian light source
- Albedo: ability of a surface to reflect light defined by the ratio of reflected power to incident power
- Irradiance ( radiometry ): optical power received by unit area
- Radiance ( radiometry ): for a light source or a diffusing/reflecting surface, power emitted per unit of solid angle and per unit of apparent area