Optical Anomalies

A great  dread  of optical engineers is the optical “mystery” which can crop up at assembly or field testing.. These “optical anomalies” can be explained, of course, but not always immediately..

Some periscope optical anomalies encountered over the years by the author and his colleagues are presented in the related page, “Periscope Optical Anomalies“. 

Other more common anomalies appear in Unwanted Multiple Images.

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