[Laser] cheap filters

Kerry Banke [email protected]
Fri, 27 Jun 2003 07:44:20 -0700


Andy - I'll check the response of some dichroic filter material I have & 
will let you know the results. If it fits your needs, I'll send you a 
couple of about 1/2" square pieces. I know it works well for the 650 nm 
laser pointers we're using but don't recall the response at 850.
  - Kerry N6IZW -

At 05:13 PM 6/25/03 -0400, you wrote:
>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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