IEVref:845-01-41ID:
Language:enStatus: Obsolete
Term: cylindrical irradiance (at a point, for a direction)
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Symbol: Ee,z
Ez
Definition: quantity defined by the formula E e,z = 1 π 4πsr L e sinεdΩ MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaiqaciWaamGadaGadeaabaGaaqaaaOqaaiaadweadaWgaaWcbaGaaeyzaiaabYcacaqG6baabeaakiabg2da9maalaaabaGaaGymaaqaaGWaaiab=b8aWbaadaWdraqaaiaadYeadaWgaaWcbaGaaeyzaaqabaaabaGaaGinaiab=b8aWjaabohacaqGYbaabeqdcqGHRiI8aOGaci4CaiaacMgacaGGUbacdiGae4xTduMaeyyXICTaaeizaiabfM6axbaa@4E0A@ where dΩ is the solid angle of each elementary beam passing through the given point, Le its radiance at that point and ε the angle between it and the given direction; unless otherwise stated, that direction is vertical

unit: W • m-2

NOTE 1 – This quantity is the quotient of the radiant flux of all the radiation incident on the outer curved surface of an infinitely small cylinder containing the given point and whose axis is in the given direction, by π times the area of the cross-section of that cylinder measured in a plane containing its axis.

NOTE 2 – The analogous quantities cylindrical illuminance Ev,z and photon cylindrical irradiance Ep,z are defined in a similar way, replacing radiance Le by luminance Lv or photon radiance Lp.


Publication date:1987
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Internal notes:2017-06-02: Cleanup - Remove Attached Image 845-01-41.gif
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