Re: [ATM] [atm_free] RE: data and musings on thin mirror

["vladimir sacek" <vla@toast.net>]

Jerry wrote:


> Why would we think we
> could determine what a Ronchi test would look like at a certain grating
> distance inside or outside COC if we think that we cannot determine the
> distance COC to grating by the observed Ronchi test?

We can only determine what the pattern should look like
if we know both, the distance and the aberration. Going
backwards, with the pattern given, we can derive one of the two remaining 
elements - distance or aberration - only with the other one known.

We should never underestimate the power of creative imagination, but when it 
comes down to cold numbers and logic, we are facing the above reality.

Vlad 

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