Normalize >EL)X
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Normalize the map data to the total emitted flux from all sources. m }a|F S
This option allows you to have the flux and irradiance normalized to the total PWh^[Rd)
emitted flux. When this box is checked, TracePro divides the values in the =9oP owq
irradiance map and the total flux by the emitted flux. This is especially useful for U~h'*nV&
calculating system transmittance for an optical system, or lighting efficiency for a P 71 (
lighting calculation. bfB\h *XO
Example 1: System Transmittance IDkWGh
Suppose you need to calculate the system transmittance of an optical system. +4[^!q*
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You would probably use the grid raytrace option, and the emitted flux is equal to "|;:>{JC
the sum of the flux in all the emitted rays. When you display an irradiance map, \!(
the system transmittance is equal to the total flux, displayed at the bottom of the E$W{8?:{
irradiance map window, divided by the emitted flux. To get the system +iRq8aS_
transmittance, check the Normalize to emitted flux box and press the Apply QM3,'?ekRH
button. The map will be redisplayed, and the Normalized Flux value will be equal 1(|D'y#
to the system transmittance. CTWn2tpW
Example 2: Lighting Efficiency /9o! *K
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating 1h6 ^>()^
a plane. You would probably choose the Surface Source raytrace option, and the 4}_O`Uxh
emitted flux is equal to the flux you specified when you defined the sources. When V .o s
you display an irradiance map, the total flux incident on the observation plane is j1_ @qns{
displayed at the bottom of the window. The lighting efficiency is equal to the total rl9. ]~
flux divided by the emitted flux. To get the lighting efficiency directly, check the T\Uek- (
Normalize to emitted flux box and press the Apply button. The map will be iA8U Yd3Q
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency &]
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of the luminaire.
