Normalize [[vu#' bc
Normalize the map data to the total emitted flux from all sources. aT i2=HL=S
This option allows you to have the flux and irradiance normalized to the total pI>yO~Ve
emitted flux. When this box is checked, TracePro divides the values in the Ug}dw a
irradiance map and the total flux by the emitted flux. This is especially useful for
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calculating system transmittance for an optical system, or lighting efficiency for a (29h{= P'
lighting calculation. k@}?!V*l
Example 1: System Transmittance |:qaF
Suppose you need to calculate the system transmittance of an optical system. 5a8[0&hA 2
You would probably use the grid raytrace option, and the emitted flux is equal to k [_)5@2
the sum of the flux in all the emitted rays. When you display an irradiance map, TNi4H:\
the system transmittance is equal to the total flux, displayed at the bottom of the sY|b y\-c
irradiance map window, divided by the emitted flux. To get the system ajr);xd
transmittance, check the Normalize to emitted flux box and press the Apply #.Q3}[M
button. The map will be redisplayed, and the Normalized Flux value will be equal ;dC>$_P?
to the system transmittance. cx+w_D9b!
Example 2: Lighting Efficiency rN$U%\.I
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating aL)}S%5o?
a plane. You would probably choose the Surface Source raytrace option, and the oc|%|pmRd<
emitted flux is equal to the flux you specified when you defined the sources. When %R|_o<(#MJ
you display an irradiance map, the total flux incident on the observation plane is 2Ra} &ie
displayed at the bottom of the window. The lighting efficiency is equal to the total _1>Xk_
flux divided by the emitted flux. To get the lighting efficiency directly, check the +, IMN)?;z
Normalize to emitted flux box and press the Apply button. The map will be 3bWYRW
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency -'!K("
of the luminaire.
