Normalize wX" 6 S:
Normalize the map data to the total emitted flux from all sources. UHF.R>Ry
This option allows you to have the flux and irradiance normalized to the total @ ;M( oFS9
emitted flux. When this box is checked, TracePro divides the values in the (Kd;l &8
irradiance map and the total flux by the emitted flux. This is especially useful for kehv85
calculating system transmittance for an optical system, or lighting efficiency for a .{LFc|Z[
lighting calculation. f@Rn& &-
Example 1: System Transmittance (Sr& Y1D
Suppose you need to calculate the system transmittance of an optical system. ~xpU<Pd*
You would probably use the grid raytrace option, and the emitted flux is equal to ~cVFCM
the sum of the flux in all the emitted rays. When you display an irradiance map, 6]rIYc[,
the system transmittance is equal to the total flux, displayed at the bottom of the wIz<Y{HA=
irradiance map window, divided by the emitted flux. To get the system Z!60n{T79c
transmittance, check the Normalize to emitted flux box and press the Apply (EGsw o
button. The map will be redisplayed, and the Normalized Flux value will be equal y!;rY1
to the system transmittance.
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Example 2: Lighting Efficiency \@vR *E
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating lwa xj7
a plane. You would probably choose the Surface Source raytrace option, and the 8i=J(5=
emitted flux is equal to the flux you specified when you defined the sources. When 4<)%Esyb
you display an irradiance map, the total flux incident on the observation plane is rY_)N^B|nF
displayed at the bottom of the window. The lighting efficiency is equal to the total q
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flux divided by the emitted flux. To get the lighting efficiency directly, check the >xws
Normalize to emitted flux box and press the Apply button. The map will be )uiYu3 I
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency :2{6Pa(eg
of the luminaire.
