Normalize ekfD+X
Normalize the map data to the total emitted flux from all sources. RNiZ2:
This option allows you to have the flux and irradiance normalized to the total }7vX4{Yn
emitted flux. When this box is checked, TracePro divides the values in the G;FY2;adK
irradiance map and the total flux by the emitted flux. This is especially useful for #P- S.b
calculating system transmittance for an optical system, or lighting efficiency for a &&|*GAjJ
lighting calculation. jGd{*4{3+
Example 1: System Transmittance Rw*l#cr=.
Suppose you need to calculate the system transmittance of an optical system. 4 _`+ &
You would probably use the grid raytrace option, and the emitted flux is equal to c0u!V+V%
the sum of the flux in all the emitted rays. When you display an irradiance map, by& #g
the system transmittance is equal to the total flux, displayed at the bottom of the +is;$ 1rq
irradiance map window, divided by the emitted flux. To get the system U=p,drF,A
transmittance, check the Normalize to emitted flux box and press the Apply < r,l
button. The map will be redisplayed, and the Normalized Flux value will be equal IR|AlIv
to the system transmittance. ld4Qh Zia
Example 2: Lighting Efficiency &?/h#oF@\
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating '6fMF#X4F
a plane. You would probably choose the Surface Source raytrace option, and the "a; JQ:
emitted flux is equal to the flux you specified when you defined the sources. When "W|Sh#JF
you display an irradiance map, the total flux incident on the observation plane is goeWZ O
displayed at the bottom of the window. The lighting efficiency is equal to the total Z6X?M&- Lz
flux divided by the emitted flux. To get the lighting efficiency directly, check the kh 1 7
Normalize to emitted flux box and press the Apply button. The map will be N|T%cdh:/
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency &2MW.,e7s
of the luminaire.
