Normalize .9vS4C
Normalize the map data to the total emitted flux from all sources. &tZIWV1&
This option allows you to have the flux and irradiance normalized to the total U6/7EOW ,
emitted flux. When this box is checked, TracePro divides the values in the ?IAu,s*u
irradiance map and the total flux by the emitted flux. This is especially useful for `e,}7zGR
calculating system transmittance for an optical system, or lighting efficiency for a [`GSc 6j
lighting calculation. 1TQ? Fxj
Example 1: System Transmittance o)5zvnu7
Suppose you need to calculate the system transmittance of an optical system. anW['!T9{s
You would probably use the grid raytrace option, and the emitted flux is equal to J-<P~9m~I
the sum of the flux in all the emitted rays. When you display an irradiance map, +zMhA p
the system transmittance is equal to the total flux, displayed at the bottom of the 3q/Us0jr
irradiance map window, divided by the emitted flux. To get the system clU ?bF~e1
transmittance, check the Normalize to emitted flux box and press the Apply 6 HCg<_j]
button. The map will be redisplayed, and the Normalized Flux value will be equal g*b`o87PI
to the system transmittance. tlQ6>v '
Example 2: Lighting Efficiency q.=Q
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating W\>O$IX^e
a plane. You would probably choose the Surface Source raytrace option, and the ywp_,j9F
emitted flux is equal to the flux you specified when you defined the sources. When Q$U.vF7BnP
you display an irradiance map, the total flux incident on the observation plane is ]z'L1vQl7
displayed at the bottom of the window. The lighting efficiency is equal to the total #|E#Rkw!
flux divided by the emitted flux. To get the lighting efficiency directly, check the legWY)4D;
Normalize to emitted flux box and press the Apply button. The map will be I+
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redisplayed, and the Normalized Flux value will be equal to the lighting efficiency "J,|),Yd
of the luminaire.
