From: "mommoteandcoyote" 
To: "Richard F.L.R. Snashall" 
Cc: 
Reply-To: "mommoteandcoyote" 


Rick,

Yes there are a couple of books.There is in a small book that was written
back in the '40s and published in 1950 by A. Bouwers called *Achievements
In Optics*.  That and Linfoot's book is what I used with a pocket
calculator for years.  The system, the way you received it ,  was my first
intuitive guess.  The system's first surface correction was e= 1.618, that
was on an early scrap of paper.  As I uncovered more stuff I found notes
showing  a string down to .6001 with the corrector RoC as you have it. 
Toward the end I shortened the radius and weakened the correction.  I'm
still trying to figure out how to enter some of this stuff into OSLO make
it work... I'LL get it. I would have mailed you with the info but my server
was down.

Coyot‚


----- Original Message -----
From: "Richard F.L.R. Snashall" 
To: "ATM" 
Sent: Sunday, January 26, 2003 3:10 PM Subject: Re: ATM VACPAN webpage updated


>
>
> Is there some source of information that would give the spherical
> aberration contributed by the primary and secondary in a Masutov
> Cassegrain system, so that the amount of aspheric that is needed
> can be calculated?  (This ignores the fact that, at certain
> values, this aspheric is close to being spherical.)
>
> Rick S.
>
>
>

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