Quote:
Originally Posted by Slawomir
Great to hear that Greg - looking forward to seeing the results of the first light 
I hope you don't mind - in another thread Nick has shared an interesting graph of 128 scopes from a Russian lab showing PV and RMS vs Strehl with some approaching Strehl of 1.
I approximately positioned the values from your certificate on the graph - blue line for PV and red for RMS - both are better than 128 scopes in this sample Clearly, none of these scopes, with some approaching Strehl of 1, are better than PV 1/8 wavelength - maybe Russians got it wrong too   |
Quote:
Originally Posted by Wavytone
Try the updated graph - a least squares quadratic fit is more appropriate as it’s a a square law relationship in theory. Hence the problem with the intercept with a linear fit.
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Thanks for the graphs. Impressive indeed.
Any statistical measure will be useless if it does not take enough samples. That is basic statistics. So it would not surprise me, as some have mentioned, that the formula used by most companies would be the one that gives the best marketing spin not the most accurate.
Greg.