Hello Narciso,





If I understand correctly, the "tolerance analysis" goal is to determine how precise the distance between two optical elements has to be, right? So that distance has to be a parameter that can be toleranced.


Could you provide a bit information like a sketch so we can be able to give further advice? You will need to use the Image button in the toolbar to add an image.





Thank you.





Sandrine

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Hello Sandrine,





First of all, thank you for your reply.





Yes, that's correct. I want to know how precise the distance (d on the image below) can be.





Thank you





Narciso

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Hello Narciso,





Thank you for your sketch. I forgot to ask last time but are you working in non-sequential mode?


If that is the case, yes you can use the "Modify Reference Object" tool in the Non-sequential editor to reference the 2nd element vs the 1st one. It will give access to that thickness.


Then the distance d can be a parameter that you can tolerance using TNPS.





To get a 1st idea of the sensitivity, you could use a 1D Universal plot under Analyze...Universal Plot and plot the merit function (your criterion, it could be the flux, ...) vs that thickness.


Then you could use the Tolerancing tool: the Inverse Sensitivity can be used to get an idea of the tolerance needed on that thickness for a given change of your criterion.





Let me know if that helps and if not do not hesitate to write us back.


Thank you!





Sandrine


 

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