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glossary
Lambertian light source
: light source with a constant radiance (or luminance) whichever the direction
Radiance ( radiometry )
: for a light source or a diffusing/reflecting surface, power emitted per unit of solid angle and per unit of apparent area
Irradiance ( radiometry )
: optical power received by unit area
Diffusion
: phenomenon by which a radiation is deflected in various directions by interaction with other objects
Reflectance
: reflection coefficient related to the intensity
