this is not easy though...... :U?g']`Z## )4g_S?l= 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, i/X3k& 7Jb&~{DVk 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......... .O-)m'5 f.g!~wGD For thsoe who knows it better, please have some input. I am rather curious, too!! Thanks!!
Hi, hopebox, @fd< e@hPb$7 Thanks for your reply. Really like those words “guess”, “doubt”… h[(YH ;Y ]5'*^rz ^ For your curiosity, have good luck! OS[
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