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Archiver > ENG-KENT-NWKFHS > 2003-09 > 1063914160


From: "Phil O'Phax" <>
Subject: Re: [NWKFHS] Home Made 'Fiche Reader
Date: Thu, 18 Sep 2003 20:42:40 +0100
In-Reply-To: <002201c37e15$0ffb8260$e8826bd5@yourudf6l682al>


Hi Keith,

Visualise an A4 scanner with the lid up/off. Now if the light were on all
the time, as opposed to only when it is scanning a document, with a switch
to switch the light on or off. Then the fiche in a glass/perspex envelope
is placed on top of the scanner/light box with a ruler used to keep a
straight line. The microscope without its converting stand is then held
above the "light box" and the magnification and the focus adjusted to
obtain the sharpest image. Without a light box, I have proved that the
principle works, but the depth of vision is not great and perhaps something
like the "helping hands" might be better to clamp the microscope in a fixed
position.

Some one with woodwork skills would be able to make a small wooden light
box on which to place the sandwiched fiche, with a low power, low heat
emitting (low voltage?) bulb to provide the back light.

Even using the light from a lap top I have been able to show that the
principle works.

Phil.

At 07:41 PM 9/18/2003, Keith Taylor wrote:

>Have been following the message exchange with great interest but cannot
>visualise the light box and microscope and their relationship to each other.
>Any chance of a bit more detail?
>
>Keith Taylor
>4913
>
>
>
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