| lightgirl |
2008-08-22 13:58 |
Normalize Qh(X7B
Normalize the map data to the total emitted flux from all sources. ~!!| #A)W
This option allows you to have the flux and irradiance normalized to the total _B&Lyg !J
emitted flux. When this box is checked, TracePro divides the values in the v8j3
K
irradiance map and the total flux by the emitted flux. This is especially useful for R&J?X Q
calculating system transmittance for an optical system, or lighting efficiency for a J 9p4\=9
lighting calculation. GNe^ ~
Example 1: System Transmittance 2\QsF,@`YU
Suppose you need to calculate the system transmittance of an optical system. m! ueqV"
You would probably use the grid raytrace option, and the emitted flux is equal to .V?[<}OJn
the sum of the flux in all the emitted rays. When you display an irradiance map, _]pu"hZz4
the system transmittance is equal to the total flux, displayed at the bottom of the xZlCFu
irradiance map window, divided by the emitted flux. To get the system y& 1@d+Lf
transmittance, check the Normalize to emitted flux box and press the Apply yxo=eSOM
button. The map will be redisplayed, and the Normalized Flux value will be equal OTdijQLY
to the system transmittance. Y`Io}h G$
Example 2: Lighting Efficiency >(
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