Normalize VRU"2mQ.P6
Normalize the map data to the total emitted flux from all sources. ,.DTJ7H+
This option allows you to have the flux and irradiance normalized to the total Oy
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emitted flux. When this box is checked, TracePro divides the values in the v=5H,4UMA
irradiance map and the total flux by the emitted flux. This is especially useful for 7+
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calculating system transmittance for an optical system, or lighting efficiency for a C# zYZ JZ
lighting calculation. |ecK~+
Example 1: System Transmittance & n$kVNE
Suppose you need to calculate the system transmittance of an optical system. -UY5T@as
You would probably use the grid raytrace option, and the emitted flux is equal to ,2oF t\`.r
the sum of the flux in all the emitted rays. When you display an irradiance map, 6 <1
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the system transmittance is equal to the total flux, displayed at the bottom of the $~7uDq
irradiance map window, divided by the emitted flux. To get the system mxD]`F
transmittance, check the Normalize to emitted flux box and press the Apply [x{z}rYH
button. The map will be redisplayed, and the Normalized Flux value will be equal " GRR,7A
to the system transmittance. ;>hRj!
Example 2: Lighting Efficiency @=_4i &]$
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating rebnV &-
a plane. You would probably choose the Surface Source raytrace option, and the 3bYP i^
emitted flux is equal to the flux you specified when you defined the sources. When pP L)!=o!
you display an irradiance map, the total flux incident on the observation plane is m.F}9HI%hN
displayed at the bottom of the window. The lighting efficiency is equal to the total )qSjI_qt5
flux divided by the emitted flux. To get the lighting efficiency directly, check the
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Normalize to emitted flux box and press the Apply button. The map will be GmhfBW ?
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency Y"H'BT!b}
of the luminaire.
