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Do you know what this process is called? This description makes it sound like the glass has to bend significantly under at most one atmosphere of (negative) pre
by somebodynew 10y ago
Do you know what this process is called? This description makes it sound like the glass has to bend significantly under at most one atmosphere of (negative) pressure, which sounds strange to me. I'd like to read more about it.
- vibrolax 10y agoThe process is called stress polishing. Here's an article about it: http://bobmay.astronomy.net/vacpan/vacpan.htm http://bobmay.astronomy.net/vacpan/vacpan.htm
- nialo 10y agoI think the trick is that the glass actually doesn't need to bend much. Notice that the caption here: https://en.wikipedia.org/wiki/Schmidt_corrector_plate#/media/File:Schema_lame_de_Schmidt.svg https://en.wikipedia.org/wiki/Schmidt_corrector_plate#/media... describes the plate as being hard to tell apart from a flat disk visually.