Re: [ATM] All BK7

["Richard F.L.R. Snashall" <rflrs@rcn.com>]

Bob May wrote:
>
> I'd like to see him do a daylite design with BSC1, F2 and some
> SK11, BK7, SK16 or SF11 that would give a nice scope at around
> f8.
But here's a 100 mm f/10 (only three singlets, all BK7) that you
probably don't want to consider building (unless you're a latent
masochist):

                                                     (NO ATMOS file)
    http://users.rcn.com/rflrs/Schupmann01-14y.len   OSLO input file
    http://users.rcn.com/rflrs/Schupmann01-14y.txt   TEXT prescription
    http://users.rcn.com/rflrs/Schupmann01-14y.zmx   ZEMAX input file

It started logically enough, though.  I conjectured that, if the
lateral color in the Schupmann were caused by passing through the
corrector lens obliquely, then it could be corrected by substituting
another Mangin mirror as the reflector; the wedge was the only way
I could achieve this, though.

The ZEMAX file shows the image surface to be a tilted biconic.  In the
OSLO file, I simply found the mean radius.  To find the performance at
other image angles in OSLO, you have to rotate the coordinate translations
and transforms through an angle.
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