> Also, I've long wondered why no one makes zone plates
> by etching and staining glass. Every zone plate I've
> seen has dirty, scratched, cloudy clear zones because
> it's been made on film base. Wouldn't glass be better?
> Could probably be done using photoetching. Maybe too
> complicated, probably too expensive.
Or maybe liquid light on a microscope slide cover. Does it stick to glass?
John
Received on Wed Aug 22 01:24:21 2001
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