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Re: [ATM] Dark finish for a telescope tube

On Fri, 29 Sep 2006, hermit wrote:

> Dominic-Luc Webb wrote:
> > On Tue, 26 Sep 2006, hermit wrote:
> >
> >
> >> A densitometer is a highly precision instrument for measuring
> >> reflectivity.  Phil Davis in his book does give a method for converting
> >> a spot meter for use.  The densitometer uses a fairly bright light.
> >>
> >
> > Labs sometimes use common scanners for densitometry.
> >
> > Dominic-Luc Webb
> >
> >
> Tried that and failed miserably.  Could have been my scanner though.
> Any links?
>
> Ken Lowther


I do not know of links, but read a reference from either Science or
Nature about 2 years ago where a flatbed scanner was used. I will
let you know if I can find it.

Dominic

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