I've only seen the skill of grinding glass discussed in the context of grinding lenses. In particular, the glass is supposed to acquire a curved surface as a result of one's efforts.
What if you want to grind a piece of glass so that it is instead perfectly flat? Does this involve essentially different techniques, both in grinding and in testing, or do they belong to a common context?
I realize nothing is perfect, so it is also necessary to ask how flat one can expect hand ground glass to be?
There are lots of books on grinding lenses for telescopes. Where can one read about how to hand grind glass perfectly flat?
Ignorantly, Allan Adler snipped-for-privacy@zurich.ai.mit.edu
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