Normalize 6U6,Wu
Normalize the map data to the total emitted flux from all sources. " l
vPge
This option allows you to have the flux and irradiance normalized to the total L5! aLv#
emitted flux. When this box is checked, TracePro divides the values in the .5'M^
irradiance map and the total flux by the emitted flux. This is especially useful for (:Rj:8{
calculating system transmittance for an optical system, or lighting efficiency for a w~hO)1c],:
lighting calculation. =.O8G=;DOA
Example 1: System Transmittance m07=
_4
Suppose you need to calculate the system transmittance of an optical system. x zu) ``?
You would probably use the grid raytrace option, and the emitted flux is equal to .'JO7of
the sum of the flux in all the emitted rays. When you display an irradiance map, r$} M,! J
the system transmittance is equal to the total flux, displayed at the bottom of the yEyx.Mh.Af
irradiance map window, divided by the emitted flux. To get the system Ahk6{uz
transmittance, check the Normalize to emitted flux box and press the Apply T%Xl(.Ft
button. The map will be redisplayed, and the Normalized Flux value will be equal }.ZX.qYX
to the system transmittance. yEIM58l
Example 2: Lighting Efficiency ?U.+S Q
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating hAtf)
a plane. You would probably choose the Surface Source raytrace option, and the 9HrT>{@
emitted flux is equal to the flux you specified when you defined the sources. When G vMhgG=D
you display an irradiance map, the total flux incident on the observation plane is r18eu B%
displayed at the bottom of the window. The lighting efficiency is equal to the total V/"UDof
flux divided by the emitted flux. To get the lighting efficiency directly, check the 68JYA?
Normalize to emitted flux box and press the Apply button. The map will be ste0:.*qb
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency /MYl:>e>
of the luminaire.
