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Re: [ATM] Betr.: Re: cutting a big piece of plate glass - Polarizer
Ok, so I'll the low hanging question. Could you just put on a pair of
polarized sunglasses?
-Anthony
> -----Original Message-----
> From: atm-bounces@atmlist.net
> [mailto:atm-bounces@atmlist.net] On Behalf Of Guy Brandenburg
> Sent: Friday, July 13, 2007 7:26 AM
> To: Harro Treur; Dominic-Luc Webb
> Cc: ATM Superheros
> Subject: Re: [ATM] Betr.: Re: cutting a big piece of plate
> glass - Polarizer
>
> We used some polarized sheets of plastic that I got from
> American Science & Surplus or else Surplus Shed, I forget
> which. It looked fine.
>
> Harro Treur <Harro.Treur@waternet.nl> wrote: Original message:
> > I now check my plate glass disks with a
> little heat and cooling and also with a polarizer. To this
> end, Polaroid manufactures some large sheet polarizers (about
> 1 m^2). A couple of these makes a quick job of checking the
> glass, and this is what I use.
> > Dominic-Luc Webb
>
>
>
> a cheap way to do a stresstest is using a normal TFT-screen.
> Such a screen, as used in Personal computers and Notebooks,
> radiates polarized light just as well as a professional
> expensive Polarizer-setup. This I learned at the public
> observatory in Almere (Netherlands).
> Looking trough the glass to the TFT-screen (switched on) will
> immediately show stress in the glass.
>
> Harro Treur
>
>
>
>
>
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> Guy Brandenburg, Washington, DC
> My home page on astronomy, mathematics, education:
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