this is not easy though...... d}3<nz, Ne,7[k I guess you need to give a try as sigma indicates the projected width of 1/e squared value of the peak irrdiance in direction cosine space...... for a normally incidence it should be around ~ cosine 85. Good luck !
Hi MANG2004, e]!Vxn3 PwQW5,,h0 I am curious about your calculation, too. Plus, the definition of σ refers to 1/e^2 width not the FWHM. Even your calculation/defintion is correct. I have a doubt that it will work when the specualr incident ray angle is not normal......... kV!0cLH!hH F\Q)l+c For thsoe who knows it better, please have some input. I am rather curious, too!! Thanks!!
Hi, hopebox, L~x3}o$-o v Q[{<|K Thanks for your reply. Really like those words “guess”, “doubt”… W:O<9ZbQ_ QG?7L_I For your curiosity, have good luck! `I ,A7b t1b$,jHmKl MANG2004 *_`T*$