[Laser] Great deal on narrow band interference filters On Ebay

[Andrew T. Flowers, K0SM]

Kerry, do you have any way to measure the passband on these?  A friend 
of mine looked into these a while back and apparently some of them 
aren't blocked well beyond the passband.  That is some of them let in 
quite a bit of IR--something that is detrimental if you are planing on 
using Si detectors.  I'll see if I can get some details.

Andy K0SM/2

Kerry Banke wrote:

>
> You guys are going to think I have a vested interest in Ebay but I 
> don't :)   I just received email from buyrightauctions indication they 
> have a large number of optical interference filters on auction. I 
> bought a few of the 650 nm 10nm narrow band  filters and they are 
> great for use with 650 nm laser pointers and go for about $2.50 each 
> plus shipping. These are cosmetic rejects but great for experimenting. 
> Look under optical interference filter or buyrightauctions.
>  - Kerry N6IZW -
>
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