Grinding an optical glass lens - GIF

Grinding an optical glass lens.

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Previously:

https://www.homemadetools.net/forum/...636#post186096
https://www.homemadetools.net/forum/...481#post151160
https://www.homemadetools.net/forum/...630#post166986
https://www.homemadetools.net/forum/...654#post174462
https://www.homemadetools.net/forum/...437#post146850

I tried grinding optical glass once. There were cameras inside a heavy walled chamber and they had to see out. I ground it on a regular combo belt and disc grinder. It worked, however I do not recommend it.

There is no surface grinding going on, here. The lens is being edged/sized/shaped to fit a spectacle frame.

When I was younger, I ground a piece of regular glass into a round shape on a bench grinder to make a turkey call. No joke. It was an experiment, more than anything. It worked - and it's possible to do - but you have to take it very slowly and carefully. It's a tedious process.