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ATM: Pol-Filter Photos

The glass to be tested is placed in front of a bright lit Notebook screen, which includes a polarisation filter. The glass is viedew through a second filter as used in photography. The following images are a first trial. Unfortunately I gave the Duran® disk away, so I can't take another, better shot. I am not able to discuss the results until I have ground and polished one or two of the shown examples

A 50 mm diameter 'Maxos®' disk as used as viewing port in the chemical industry:

Another example:

A 210 mm diameter Duran® disk