this is not easy though......
|{g+Y &m3.h!dq 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, ?wMHS4 J?)RfK|! 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......... Xog/O i 7RU}FE For thsoe who knows it better, please have some input. I am rather curious, too!! Thanks!!
Hi, hopebox, |ifHSc.j< mOll5O7VW Thanks for your reply. Really like those words “guess”, “doubt”… D| I Ec? QrD o|GtE For your curiosity, have good luck! '6Qy /R Q>}2cDl MANG2004 >Dm8m[76