Normalize 7`DBS^O]dG
Normalize the map data to the total emitted flux from all sources. %[ Z \S0C
This option allows you to have the flux and irradiance normalized to the total 0tT(W^ho g
emitted flux. When this box is checked, TracePro divides the values in the h7lDHIQf
irradiance map and the total flux by the emitted flux. This is especially useful for l)1r+@) \
calculating system transmittance for an optical system, or lighting efficiency for a e#$]Y?,
lighting calculation. {Tq_7,8
Example 1: System Transmittance N_W}*2(
Suppose you need to calculate the system transmittance of an optical system. RC7]'4o
You would probably use the grid raytrace option, and the emitted flux is equal to !
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the sum of the flux in all the emitted rays. When you display an irradiance map, &m)6J'q3k
the system transmittance is equal to the total flux, displayed at the bottom of the I
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irradiance map window, divided by the emitted flux. To get the system [\v}Ul
transmittance, check the Normalize to emitted flux box and press the Apply K8GP@yD]M
button. The map will be redisplayed, and the Normalized Flux value will be equal +M\`#i\g>
to the system transmittance. e g;~zv
Example 2: Lighting Efficiency (X \@t-8
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating !Prg_6
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a plane. You would probably choose the Surface Source raytrace option, and the &8Cu#^3
emitted flux is equal to the flux you specified when you defined the sources. When k@ R Dvn
you display an irradiance map, the total flux incident on the observation plane is $P/~rZ@M@
displayed at the bottom of the window. The lighting efficiency is equal to the total Y NKH N2E8
flux divided by the emitted flux. To get the lighting efficiency directly, check the }ppN k :B
Normalize to emitted flux box and press the Apply button. The map will be 1\
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redisplayed, and the Normalized Flux value will be equal to the lighting efficiency '"0'Oua
of the luminaire.
