this is not easy though...... gNO$WY^ KYeA= I guess you need to give a try as sigma indicates the projected width of 1/e squared value of the peak irrdiance in direction cosine space...... for a normally incidence it should be around ~ cosine 85. Good luck !
Hi MANG2004, NR3IeTd 5<S1,u5 I am curious about your calculation, too. Plus, the definition of σ refers to 1/e^2 width not the FWHM. Even your calculation/defintion is correct. I have a doubt that it will work when the specualr incident ray angle is not normal......... ES+&e/G"ds .3Ap+V8? For thsoe who knows it better, please have some input. I am rather curious, too!! Thanks!!
Hi, hopebox, I?:V EN: 1"k
+K~: Thanks for your reply. Really like those words “guess”, “doubt”… ,CdI.kV>o2 |)lo<}{ For your curiosity, have good luck! :Rq D0>1 oNdO@i%.q4 MANG2004 'R$~U?i8