Re: [ATM] holographic null test on round robin mirror C

[Andy Saulietis <iss@pvtnetworks.net>]

Matt writes,

>As far as anecdotal evidence about how scalable for small apertures this is,
>I have measured an 8" mirror with a 32 subaperture cardboard Hartman mask
>placed over the telescope aperture , a cheap ccd at prime focus and the
>analysis software . This also convinced me of how inexpensive the method
>really is . This mask samples the 8" mirror at points spaced 1.5" apart and
>it's 2 dimensional . I was not pushing any limits in doing this .<snip>

Do you have any quantifable data on the accuracy of the mirror
resulting from these measurements, and if so, what were they?



   


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