[Laser] cheap filters

Staff [email protected]
Wed, 25 Jun 2003 17:44:21 -0400


cellophane worked well for me.
Brian
-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of Andrew T. Flowers, K0SM
Sent: Wednesday, June 25, 2003 5:13 PM
To: [email protected]
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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