Normalize S*-/#j
Normalize the map data to the total emitted flux from all sources. `<:D.9vO "
This option allows you to have the flux and irradiance normalized to the total vCh/%7+
emitted flux. When this box is checked, TracePro divides the values in the u9}k^W)E
irradiance map and the total flux by the emitted flux. This is especially useful for H s~u&c
calculating system transmittance for an optical system, or lighting efficiency for a #n8jn#
lighting calculation. % "0g }tK6
Example 1: System Transmittance =icynW^Fr
Suppose you need to calculate the system transmittance of an optical system. n@Ar%%\
You would probably use the grid raytrace option, and the emitted flux is equal to & _N$S2
the sum of the flux in all the emitted rays. When you display an irradiance map, ZNEWUt{+;^
the system transmittance is equal to the total flux, displayed at the bottom of the y.:Z:w6$
irradiance map window, divided by the emitted flux. To get the system ?yq1\G)]
transmittance, check the Normalize to emitted flux box and press the Apply 9As K=/Buf
button. The map will be redisplayed, and the Normalized Flux value will be equal x)<Hr,wd
to the system transmittance. w_ hGWpm
Example 2: Lighting Efficiency 8#MiM . f
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating 8XU m. nV
a plane. You would probably choose the Surface Source raytrace option, and the E{Ux| r~
emitted flux is equal to the flux you specified when you defined the sources. When _#8OHG.x
you display an irradiance map, the total flux incident on the observation plane is pjP
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displayed at the bottom of the window. The lighting efficiency is equal to the total "m e
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flux divided by the emitted flux. To get the lighting efficiency directly, check the \)Bws `
Normalize to emitted flux box and press the Apply button. The map will be j%qBNoT ~
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency #K3`$^0 s
of the luminaire.
