Re: [ATM] 7 inch spherical mirror

["David Harbour" <stainless_steel@suddenlink.net>]

Is the stop the entrance pupil, and if it is, where is it located?

R-101

----- Original Message ----- 
From: "Richard F.L.R. Snashall" <rflrs@rcn.com>
To: "ATM List" <atm@atmlist.net>
Sent: Monday, April 14, 2008 3:26 PM
Subject: Re: [ATM] 7 inch spherical mirror


> Dominic-Luc Webb wrote:
>> Interesting points cropping up. Richard, now that you are
>> analyzing this, may I ask if you get same amout of coma
>> for both sphere and parabola for same aperture stop?
>>
>> Dominic
> ZEMAX indicates that both the paraboloid and the sphere have
> the same (Seidel) coma, astigmatism, field curvature, and
> distortion, the last being zero.  Again, these are with the
> stop coincident with the mirror edge.
> 
> 
> 
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