The lens coating patent by Zeiss (T coating)

Published in Spring 2004 Zeiss Historica Journal

Author: Peter Hennig, Milos Paul Mladek

See Pages 22 – 23

A modern evaluation of the 1934 invention of multi-coating by Dr. Alexandar Smakula. It is far more diverse and advanced than one would expect. It was hidden until 1940 when the patent was finally approved. Until then, it had been a German state secret.

To go to the Journal itself, click on the year 2004 in the first line above.