Re: [ATM] Updated web site

[Michael Peck <mpeck1@ix.netcom.com>]

At 10:05 20-06-04, Scott Rychnovsky wrote:

>PS-For those of you who use David Rowe's FringeXP program, how good should 
>one expect the RMS fit of the Zernike polynomial to be before you take the 
>analysis seriously?
>--

Scott:

Are you talking about the "Zernike fit error" (I think that's what Dave 
calls it)? For a single pass test on a moderately aspheric mirror I'd say 
an RMS fit error of 0.04-0.06 waves is typical. Divide that by two or a 
little more for a double pass null test.

The best way to decide how seriously to take your analysis is to analyze 
multiple interferograms, preferably with the mirror rotated to two or more 
distinct orientations.

Mike Peck


_________________

Michael Peck
email mpeck1@ix.netcom.com
Wildlife photography page http://home.netcom.com/~mpeck1/index.html
Amateur telescope making http://home.netcom.com/~mpeck1/astro/astro.html 

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