Normalize :z2G
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Normalize the map data to the total emitted flux from all sources. c3J12+~;
This option allows you to have the flux and irradiance normalized to the total ]J lM/
emitted flux. When this box is checked, TracePro divides the values in the i!+0''i{#
irradiance map and the total flux by the emitted flux. This is especially useful for |H;+9(
calculating system transmittance for an optical system, or lighting efficiency for a LzD,]{CC5
lighting calculation. Q1P=A:*]9
Example 1: System Transmittance @"n]v)[4
Suppose you need to calculate the system transmittance of an optical system. w\ddC DZ
You would probably use the grid raytrace option, and the emitted flux is equal to C /w]B[H
the sum of the flux in all the emitted rays. When you display an irradiance map, SA{5A 1
the system transmittance is equal to the total flux, displayed at the bottom of the x<=R?4@rq
irradiance map window, divided by the emitted flux. To get the system k;
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transmittance, check the Normalize to emitted flux box and press the Apply j`%a2
button. The map will be redisplayed, and the Normalized Flux value will be equal ^=y%s
to the system transmittance. Wo~;h (6
Example 2: Lighting Efficiency
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Suppose you need to calculate the lighting efficiency of a luminaire in illuminating \I 7,1I
a plane. You would probably choose the Surface Source raytrace option, and the ;+rcT;_^/
emitted flux is equal to the flux you specified when you defined the sources. When S^nI=HTm
you display an irradiance map, the total flux incident on the observation plane is newURb,-!
displayed at the bottom of the window. The lighting efficiency is equal to the total WU~L#Ih.V
flux divided by the emitted flux. To get the lighting efficiency directly, check the ?D=C8[NEX
Normalize to emitted flux box and press the Apply button. The map will be j7b 4wH \#
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency "f>`ZFp^
of the luminaire.
