Re: gEDA-user: OT: UV exposure?

[Dave McGuire <mcguire@xxxxxxxxxxxxx>]

On Jun 27, 2006, at 12:43 PM, John Doty wrote:
> > I might suggest only putting a window on the areas that require 
> > illumination.
>
> Yes. UV may not be the only problem. Put a big window on a box, let 
> sunlight in, and IR will make the insides of the box *very* hot. What 
> is the application? Might want a filter anyway if, say, you want to be 
> sensitive to direct sun but not to blue sky. A green filter from a 
> camera shop might be what you want here: let in medium wavelengths 
> (where your diodes will have their best quantum efficiency anyway), 
> reject the extremes.

  The application is an optical direction finder for lightning.  Since 
the devices will only be powered at night anyway, I was thinking of 
some sort of mechanical shield that covers the assembly during the day, 
but I live very close to the coast so the salt air will do nasty things 
to anything mechanical.

         -Dave

--
Dave McGuire
Cape Coral, FL

_______________________________________________
geda-user mailing list
geda-user@xxxxxxxxxxxxxx
http://www.seul.org/cgi-bin/mailman/listinfo/geda-user