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I've modelled 2mm laser beam hitting the vertex of R2. It doesn't look good. At 500mm (where Bath beamsplitter/lens would be) it looks like it gets severely affected, nearly 10 waves. See pic.
I think Bath might not be the best way to do this. Use Bath to figure the concave reference and then contact test it. You can still use DFTF or OpenFringe to analyse results ...
Last edited by bratislav; 29-04-2017 at 10:32 AM.
Reason: updated pic
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