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BobH1357
super member
Reged: 01/15/05
Posts: 161
Loc: San Jose, CA
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Re: It works! - CaK fluorescent eyepeice..
05/01/06 09:44 PM
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It's Schott filter glass, type GG-420. The thickness I use is 1mm, which may be a bit too thin to keep its flatness for imaging purposes. I'd glue it between anti-reflection coated windows, the input side for the Ca-K line and the putput side for broadband green. Broadband visible AR coatings might work on both sides as well, though.
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