Dear All,
I am conducting a tolerance for an optical system and setting the criterion to be RMS Spot Radius.
The nominal criterion value is 1.7815 while the actual spot radius value is a lot smaller than this value as shown in the snippet below.
![](https://uploads-us-west-2.insided.com/zemax-en/attachment/76072a99-215f-4ba8-be74-0d839b46cbe7.png)
I did some search and found this discussion here but I really did not understand what I should do with my current merit function editor. The Merit Function value is 0.00420 as shown in the snippet below.
![](https://uploads-us-west-2.insided.com/zemax-en/attachment/de180411-dd93-41be-92e5-6495ba970d93.png)
Any idea on what I am missing here?
Thank you
Kind Regards,
Naif
Best answer by MichaelH
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