[Laser] cheap filters

Wed, 25 Jun 2003 20:13:58 -0500

Might want to check into a filter for telescopes.I know Meade makes a light
polution filter that takes out soduim light.www.meade.com will get you
there.   Gregg K9KL and owner of Tower View Observatory.
----- Original Message -----
From: "Andrew T. Flowers, K0SM" <[email protected]>
To: <[email protected]>
Sent: Wednesday, June 25, 2003 4:13 PM
Subject: [Laser] cheap filters


> Anyone have any suggestions on cheap bandpass filters for visible red
> lasers?  I'm looking for something that would pass 630-700nm, but have
> substantial attenuation at 850nm.  The reason for this is to get rid of
> the 850nm line spectrum from sodium lamps.  I'm thinking about
> cellophane or plexiglass that I might be able to find easily.  I thought
> I would ask here before I went to the lab via the craft store....
>
> Andy
>
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