Normalize Q\vpqE! 9
Normalize the map data to the total emitted flux from all sources. !F-w3
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This option allows you to have the flux and irradiance normalized to the total {fM'6;ak
emitted flux. When this box is checked, TracePro divides the values in the # w4-aJ
irradiance map and the total flux by the emitted flux. This is especially useful for ^
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calculating system transmittance for an optical system, or lighting efficiency for a hfB%`x#akQ
lighting calculation. ty!`T+ 3
Example 1: System Transmittance (,2S XV
Suppose you need to calculate the system transmittance of an optical system. YP <ms
You would probably use the grid raytrace option, and the emitted flux is equal to C.P*#_R
the sum of the flux in all the emitted rays. When you display an irradiance map, }>| s=uGW
the system transmittance is equal to the total flux, displayed at the bottom of the Q{>k1$fkV
irradiance map window, divided by the emitted flux. To get the system {S \{Ii6
transmittance, check the Normalize to emitted flux box and press the Apply DCa^
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button. The map will be redisplayed, and the Normalized Flux value will be equal = svN#q5s
to the system transmittance. H8jpxzXv
Example 2: Lighting Efficiency y.k~Y0
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating 4_lrg|X1
a plane. You would probably choose the Surface Source raytrace option, and the wHLLu~m\
emitted flux is equal to the flux you specified when you defined the sources. When TX/Xt7#R:
you display an irradiance map, the total flux incident on the observation plane is ej d(R+
displayed at the bottom of the window. The lighting efficiency is equal to the total _f,C[C[e&
flux divided by the emitted flux. To get the lighting efficiency directly, check the T!{w~'=F
Normalize to emitted flux box and press the Apply button. The map will be o-HT1Hc!
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency 0mVN QxHI
of the luminaire.
