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Re: [ATM] Re: Foucault test limitations

James,

What was amount of primary astigmatism of the Charlie's
mirror you finaly settled on (before hundred polishing sessions).
Was it z(4)=0.128; Z(5)=-0141

>Robo agrees with the interferometer so long as there is LIMITED astigmatism

Where will you place this limit approximately?

Do you have idea or feeling  at what level of primary astigmatism
Couder mask Foucault fails?

Vladimir.







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