Re: [ATM] 7 inch sphereical mirror

[Dale Eason <atmpob@yahoo.com>]

I should probably also clarify that the artificail
null was then used for the spherical zernike term.
and its value is -.01958

Dale

--- Dale Eason <atmpob@yahoo.com> wrote:

> This is a good opertunity to verify my idea of how I
> got the numbers using OpenFringe and Zernike terms.
> 
> Using openfringe I setup the mirror to be 7 inch
> diameter and 140 inch ROC.  Then I set all of the
> zernike terms to zero.  I turned on the artificial
> null as in testing using the Bath at ROC.
> 
> The profile graph shows that everywhere the error is
> less than .2 on the wavefront the RMS is 1/21 wave.
> 
> Does what I did sound right?  The Foucault and
> Ronchi
> simulations show the mirror to be a perfect sphere.
> 
> Here is the start test PSF and MTF
>
http://www.atmlist.net/contrib/atmpob-at-yahoo-dot-com/7inch_sphere.jpg
> 
> Dale Eason
> --- David Rowe <atmlist@starryridge.com> wrote:
> 
> > Howdy,
> > 
> > At optimum focus I get an RMS diameter of ~ 9
> > microns.  A little
> > parabolizing would be useful for this mirror.
> > 
> > -- Dave Rowe
> > 
> > -----Original Message-----
> > From: atm-bounces@atmlist.net
> > [mailto:atm-bounces@atmlist.net] On Behalf Of
> > Richard
> > Sent: Saturday, April 12, 2008 7:00 AM
> > To: Dale Eason
> > Subject: Re: [ATM] 7 inch sphereical mirror
> > 
> > Hi Dale,
> > 
> > Saturday, April 12, 2008, 5:57:08 AM, you wrote:
> > 
> > DE> using OpenFringe...  The RMS error is 1/21
> wave
> > and the
> > DE> strehl is .92.
> > 
> > Zemax is considerably less optimistic. On axis
> spot
> > size is 17um RMS
> > with a 6.7um Airy disk. On axis Strehl is 0.25.
> > 
> > -- 
> > 
> > Best regards,
> >   Richard in the UK
> > 
> > _______________________________________________
> > ATM mailing list http://www.atmlist.net/
> > 
> > _______________________________________________
> > ATM mailing list http://www.atmlist.net/
> > 
> 
> 
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam
> protection around 
> http://mail.yahoo.com 
> _______________________________________________
> ATM mailing list http://www.atmlist.net/
> 


__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 
_______________________________________________
ATM mailing list http://www.atmlist.net/