Re: [ATM] Vacuuming a Foil

["Malcolm Macdonald" <toliman@wave.co.nz>]

----- Original Message ----- 
From: "Treur, Harro" <H.Treur@wlb.amsterdam.nl>
To: "'Douglas S Angle'" <Douglas.S.Angle@can.dupont.com>; "'Malcolm
Macdonald'" <toliman@wave.co.nz>; "'Charles Mitchard'"
<charlesmitchard@iinet.net.au>
Sent: Friday, October 01, 2004 7:21 PM
Subject: RE: [ATM] Vacuuming a Foil


> Thank you for your answers.
>
> The same evening I did a short try with survival-blanket spun over a
> cookingpan.
> The image was not very well: a bit hazy.
>
> But the idea of Baader foil is certainly more promising. It has a better
> reflected image. Unfortunatley it is not really cheap.

Since last night I have had more time to think. Plastic film or foil was the
first thing that came to mind but it may not be the best. Even the best film
is bound to have imperfections,  even a few microns, which could cause a
minute bulge in thin film. Now if instead of film  one was to use a soft
flexable well made material say a centimeter or two thick, and with the same
'few micron' variation of thickness, that variation would have little effect
because it is such a small percentage of the thickness of the thicker
material.

Also, to mount it you would need two well made flanges that would lightly
clamp it like meet in a sandwich, without any stretching, then a small
extractor fan would be sufficient to create the small sag needed.
.........hummm now those flanges may need to be slightly bevelled to line up
with the sag. to avoid a turned edge.    Hay I'd better quit before this
gets complicated.


> In the meantime there are a thousand other things to take care of.

Seems life is just the same on your side of the world.


>But as
> soon as I have made some mirror-progression, you will hear from me.
>
> Thank you
>
> Best regards
> Harro Treur

                    Regards      Malcolm


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