Normalize \ cr)O ^&
Normalize the map data to the total emitted flux from all sources. ja-,6*"k
This option allows you to have the flux and irradiance normalized to the total )` ^/Dj;
emitted flux. When this box is checked, TracePro divides the values in the 9OS~;9YR
irradiance map and the total flux by the emitted flux. This is especially useful for Y 9SaYSX
calculating system transmittance for an optical system, or lighting efficiency for a Clo}kdkd_
lighting calculation. nu6p{_M
Example 1: System Transmittance %(X^GL
Suppose you need to calculate the system transmittance of an optical system. r ,r"?}Z
You would probably use the grid raytrace option, and the emitted flux is equal to 8
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the sum of the flux in all the emitted rays. When you display an irradiance map, _kZ&t_]
the system transmittance is equal to the total flux, displayed at the bottom of the a
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irradiance map window, divided by the emitted flux. To get the system EJid@
transmittance, check the Normalize to emitted flux box and press the Apply !^x;4@Ejm
button. The map will be redisplayed, and the Normalized Flux value will be equal 1)BIh~1{p
to the system transmittance. Oj F]K,$
Example 2: Lighting Efficiency Y(<(!TJ-
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating = j!nt8]8
a plane. You would probably choose the Surface Source raytrace option, and the s}93nv*ez
emitted flux is equal to the flux you specified when you defined the sources. When TB%NHq-!
you display an irradiance map, the total flux incident on the observation plane is 84g8$~M
displayed at the bottom of the window. The lighting efficiency is equal to the total X
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flux divided by the emitted flux. To get the lighting efficiency directly, check the n|'}W+
Normalize to emitted flux box and press the Apply button. The map will be }nK=~Wcu\
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency ;39~G T
of the luminaire.
