Normalize X)nOY*
Normalize the map data to the total emitted flux from all sources. ;7 IVg[f
This option allows you to have the flux and irradiance normalized to the total .X:{s,@
emitted flux. When this box is checked, TracePro divides the values in the v,>q]!
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irradiance map and the total flux by the emitted flux. This is especially useful for I M
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calculating system transmittance for an optical system, or lighting efficiency for a HkrNh>^=
lighting calculation. poXkH@[O
Example 1: System Transmittance {]Lc]4J
Suppose you need to calculate the system transmittance of an optical system. 6j`
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You would probably use the grid raytrace option, and the emitted flux is equal to A= ,q&
the sum of the flux in all the emitted rays. When you display an irradiance map,
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the system transmittance is equal to the total flux, displayed at the bottom of the ytAhhwN~
irradiance map window, divided by the emitted flux. To get the system ~zRW *pd
transmittance, check the Normalize to emitted flux box and press the Apply qqkZbsN
button. The map will be redisplayed, and the Normalized Flux value will be equal d628@~ Ekn
to the system transmittance. R[_7ab]A
Example 2: Lighting Efficiency Gg-<3z
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating Nwu#,f=X
a plane. You would probably choose the Surface Source raytrace option, and the +vYm:
emitted flux is equal to the flux you specified when you defined the sources. When ?]P&3UU>0z
you display an irradiance map, the total flux incident on the observation plane is hs/nM"V
displayed at the bottom of the window. The lighting efficiency is equal to the total px-*uh<
flux divided by the emitted flux. To get the lighting efficiency directly, check the E6@+w. VVO
Normalize to emitted flux box and press the Apply button. The map will be "`&?<82
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency PE4{;|a }
of the luminaire.
