IEVref:845-21-058ID:
Language:enStatus: Standard
Term: photon irradiance
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Symbol: Ep
E
Definition: density of incident photon flux with respect to area at a point on a real or imaginary surface

E p = d Φ p dA

where Φp is photon flux and A is the area on which the photon flux is incident

Note 1 to entry: The corresponding radiometric quantity is "irradiance". The corresponding photometric quantity is "illuminance".

Note 2 to entry: The photon irradiance is expressed in second to the power minus one per square metre (s−1·m−2).

Note 3 to entry: This entry was numbered 845-01-39 in IEC 60050-845:1987.


Publication date:2020-12
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