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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
Optical system
: in geometrical optics, assembly of optical components for redirecting the light in a controlled manner
Aperture
: diaphragm limiting the number of light rays that are able to propagate
Transmission
: ratio between transmitted radiation power (or intensity or amplitude) and incident radiation power (or intensity or amplitude)
