In Help Files of ZEMAX, It tells me that the relative illuminance is calculated by integrating the effective area of the exit pupil observed from the image point. The integration is performed in cosine space, using a uniform grid of image-square cosine space.
I would like to know whether it is possible to reproduce the calculation of RI by ZEMAX through ray tracing and programming or other methods? Please feel free to enlighten me.
Thank you all
Best answer by Angel MoralesView original