Normalize (m80is l
Normalize the map data to the total emitted flux from all sources. >;kCcfS3ct
This option allows you to have the flux and irradiance normalized to the total _+YCwg
emitted flux. When this box is checked, TracePro divides the values in the 3?SofPtc/
irradiance map and the total flux by the emitted flux. This is especially useful for T{3C3EE?]
calculating system transmittance for an optical system, or lighting efficiency for a 8 7P{vf#
lighting calculation. RB.& ,1
Example 1: System Transmittance ,L%\ {bp5
Suppose you need to calculate the system transmittance of an optical system. Yh)yp?
You would probably use the grid raytrace option, and the emitted flux is equal to Wm$( b2t
the sum of the flux in all the emitted rays. When you display an irradiance map, PhW< )B]
the system transmittance is equal to the total flux, displayed at the bottom of the RQ}(}|1+\
irradiance map window, divided by the emitted flux. To get the system cZI )lX
transmittance, check the Normalize to emitted flux box and press the Apply n0g,r/
button. The map will be redisplayed, and the Normalized Flux value will be equal / 1
lIV_Z
to the system transmittance. RpPbjz~
Example 2: Lighting Efficiency Wc [@,
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating BV,P;T0"D
a plane. You would probably choose the Surface Source raytrace option, and the [` ~YPUR*
emitted flux is equal to the flux you specified when you defined the sources. When rStfluPL
you display an irradiance map, the total flux incident on the observation plane is zM{'GB+en
displayed at the bottom of the window. The lighting efficiency is equal to the total 3&'ll51t
flux divided by the emitted flux. To get the lighting efficiency directly, check the ss6 3/
Normalize to emitted flux box and press the Apply button. The map will be 2:'C|
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency XlIRedZ{
of the luminaire.
