illuminance(redirected from Luminous emittance)
Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to Luminous emittance: luminous exitance
Quotient of the luminous flux, F, incident on an element of surface divided by the area, A, of that element of surface. Symbol: E. Thus
E = F/AThe units are in lux or footcandles. Syn. illumination. See inverse square law of illumination; photometer.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann