Normalize 7S}NV7
Normalize the map data to the total emitted flux from all sources. SwXVa/9a"
This option allows you to have the flux and irradiance normalized to the total 6 -N 442
emitted flux. When this box is checked, TracePro divides the values in the : tdN#m6&
irradiance map and the total flux by the emitted flux. This is especially useful for ) pbsvR_
calculating system transmittance for an optical system, or lighting efficiency for a W 2&o'(P\
lighting calculation. n#|ljC
Example 1: System Transmittance e
^2n58
Suppose you need to calculate the system transmittance of an optical system. _ VKBzOH
You would probably use the grid raytrace option, and the emitted flux is equal to "m4. _4U
the sum of the flux in all the emitted rays. When you display an irradiance map, ~}pc&jz>q
the system transmittance is equal to the total flux, displayed at the bottom of the _( l? gj
irradiance map window, divided by the emitted flux. To get the system C.].HQ
transmittance, check the Normalize to emitted flux box and press the Apply 2RG6m=Y8y
button. The map will be redisplayed, and the Normalized Flux value will be equal E2 K{9 @i
to the system transmittance. g[';1}/B4
Example 2: Lighting Efficiency SMoJKr(:w#
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating %D1 |0v8}
a plane. You would probably choose the Surface Source raytrace option, and the 4Oo{\&(
emitted flux is equal to the flux you specified when you defined the sources. When \ Kr8k`f
you display an irradiance map, the total flux incident on the observation plane is _ t &` T
displayed at the bottom of the window. The lighting efficiency is equal to the total M#n lKj<
flux divided by the emitted flux. To get the lighting efficiency directly, check the J/LsL
k
Normalize to emitted flux box and press the Apply button. The map will be lg"aB
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency aKjP{Z0k$
of the luminaire.
