To: "Alfredo Neves" ,
From: Dennis Rech 
Reply-To: Dennis Rech 


At 07:33 PM 5/19/03 -0400, Alfredo Neves wrote:

>Hi,
>
>I am trying to build a tester for the waineo null test and I am having
>problems injecting sufficient light into a 50 micron fiber. Basicaly I
>am using a white led and gluing the fiber to the led. There is just
>sufficient light for seen some dim ronchi lines. What I would like is
>some for of getting ALOT of light so I can see fine surface details. Is
>anyone using a real high light power set up.
>
>Regards,
>
>Alfredo
>
>P.S. Yes I have checked that end of my fibers are correctly cut and
>polished!

Hello Alfredo,
I know nothing about the Waineo test, but if you do indeed need more light
transferred through a fiber optics cable, I have had good results with
drilling a small hole into the plastic of the diode and inserting the glued
polished end of the cable into the hole. If you drill too deep, the diode
will fail. However, diodes are cheap and this will give a major increase in
transmitted light.
I don't know if this will be enough.

In an experiment to make a lighted star ceiling, I have inserted dozens of
fibers into a single diode.

These people sell an assortment of fiber optics materials to hobbyists.
http://www.thefiberopticstore.com/

Hope this helps,
Dennis

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