Hello All,

I am working on design consisting a grating. Analysis in  sequential mode shows all desire wavelength of -1st diffraction order is coming at the desire position of detector after diffraction form Grating. 

But when I have converted this file to non-sequential mode for radiometric analysis, I found all the diffraction order (-2,-1,0,1, 2) is having same power. But in actual case, zero order should have maximum intensity compared to other diffraction order and intensity should gradually diminish as we move away from zeroth order in +ve and -ve direction.

How Zemax is calculating radiometric data for different diffraction order?

Sample file I have used for the analysis is attached here for your reference.

Thankyou.