Normalize (JH LWA H
Normalize the map data to the total emitted flux from all sources. f{xR
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This option allows you to have the flux and irradiance normalized to the total f u?5gzT+b
emitted flux. When this box is checked, TracePro divides the values in the ,Xs%Cg_Ig
irradiance map and the total flux by the emitted flux. This is especially useful for /%EKq+ZP
calculating system transmittance for an optical system, or lighting efficiency for a mr6/d1af_
lighting calculation. 8ar2N)59
Example 1: System Transmittance no- L x-x
Suppose you need to calculate the system transmittance of an optical system. L&=j O0_
You would probably use the grid raytrace option, and the emitted flux is equal to d af$ `
the sum of the flux in all the emitted rays. When you display an irradiance map, lTJ1]7)
the system transmittance is equal to the total flux, displayed at the bottom of the ePdM9%
irradiance map window, divided by the emitted flux. To get the system R#i|n< x
transmittance, check the Normalize to emitted flux box and press the Apply |-4C[5rM
button. The map will be redisplayed, and the Normalized Flux value will be equal gvvl3`S{
to the system transmittance. vZj^&/F$=g
Example 2: Lighting Efficiency ^29w @*
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating
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a plane. You would probably choose the Surface Source raytrace option, and the 'c<vj
jIg
emitted flux is equal to the flux you specified when you defined the sources. When CnruaN@
you display an irradiance map, the total flux incident on the observation plane is &o{I9MD
displayed at the bottom of the window. The lighting efficiency is equal to the total o"~ODN" L
flux divided by the emitted flux. To get the lighting efficiency directly, check the C` +g:qT
Normalize to emitted flux box and press the Apply button. The map will be lS]<~
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency f I>>w )5
of the luminaire.
