Re: Inexpensive Telescope Design Revealed
- From: nytecam <nytecam.1yhflm@xxxxxxxxxxxxxxx>
- Date: Mon, 14 Nov 2005 08:23:17 +0000
John Savard Wrote:
> .... I have decided to release to the public a design I have come up
> with for an inexpensive telescope.
>
> http://www.quadibloc.com/science/opt02.htm
>
> and the design, as given, is a Field-Maksutov telescope with an f/13.9
> focal ratio. The secondary mirror and the meniscus corrector of the
> Field type are held in position by a full-aperture meniscus corrector,
> but this corrector is curved in the opposite direction from that of a
> Maksutov telescope.
>
> John Savard
>
> Thanks John - interesting webpage. Could you identify this design more
> precisely for me as I seem lost in the many options;-).
>
> Regarding forming aspheric corrector plates I thought the plane plate
> was vacuum deformed against a metal former and ground/figured flat to
> form the required profile when the vacuum was released??
>
> Of possible interest, my experiments published in S&T
> http://home.freeuk.com/m.gavin/flux.htm
> with partial vacuum induced membrane mirrors formed an approximate
> oblate spheroid figure and not a spherical or paraboloidal figure as
> commonly assumed. You refer on your page to a vacuum induced plate
> glass as spherical - admittedly glass is [on the short time scale]
> rigid.
>
> regards
> Nytecam
> www.astroman.fsnet.co.uk
--
nytecam
.
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