[Laser] Checking bandpass of filters

[Kerry Banke]

I can easily check the response of filters in the visual range using my 
cheap spectrometer. This thing works amazingly well with faily  accurate 5 
nm  scale ticks. Unfortunately it doesn't show what's going on in the IR 
and UV ends of the range.  This is what I use to match up my filters to my 
visible lasers & LEDS

The following site has nice photos of the display & info on the construction.
http://home.attbi.com/~mcculloch-brown/spectrostar.html

The following site is where it can be ordered. The cost is $24.95 plus
shipping.
http://www.astrosociety.org/cgi-local/SoftCart.exe/online-store/scstore/p-OA
160.html?E+scstore