When we use detector polar to see far field intensity distribution from an illumination optics we can see the total lumen output captured at the bottom of the detector display or in the text tab. Screenshot below is an example from a TIR optics with diffusing elements.

But sometimes I also need to see the lumen contained in certain beam angle (FWHM 50%) or field angle (10% intensity). Is there some easy way to get that in NSC mode? Or should I try ray string filter method with saved rays?

JS