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Littrow prism
Going out on a limb here thinking that some of you will old dead tunable ions, may have littrow prisms on the side.
Coated broadband green to red, yellow to red, or blue to green, will make me a happy camper. A Kr prism would even work for HeNes, especially for my recently made red, yellow, and green HeNe (all three lines at once with external optics).
If you happen to have any of these available, collecting dust, PM me please.
Thank you.

Last edited by SoulFeast; 10-03-2013 at 19:11.
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