Re: ATM An Old TMs Simple Query

["mommoteandcoyote" <mommoteandcoyote@msn.com>]

Richard S.

Thank you so very much!!!

Talk with you soon,
Coyoté
----- Original Message -----
From: "Richard F.L.R. Snashall" <rflrs@rcn.com>
To: <atm@shore.net>
Sent: Wednesday, January 22, 2003 4:27 PM
Subject: Re: ATM An Old TMs Simple Query


>
>
>
> Jerry Hudson wrote:
> > To ol' Coyote -
> >
> > Your formula,
> >
> >> a*rho^2+b*rho^+b*rho^4...
> >
> > giving the shape of the Schmidt plate, is
> > exactly opposite in sign to the wavefront
> > aberration describing an uncorrected spherical
> > mirror.  The glass introduces just enough extra
> > path length where it is thicker to compensate.
> >
>
> In fact, Kingslake uses this exactly.  Couched
> in the latter part of the proof:
>
> "Along the axis this optical path is
> evidently (nt+r+a).  Equating these.."
>
> I was slightly taken back when I saw this.  Don't
> know why, just was.
>
> Rick S.
>
>
>