[visionlist] Peter van der Helm

Prof. Michael Bach michael.bach at uni-freiburg.de
Sat Jan 25 13:33:03 -04 2020

Dear Rob, Johan and All:

> Hereby we sadly announce the passing of dr. Peter van der Helm. …
Thank you, sad indeed. I might add that he also “invented” the Kaleidoscope motion illusion
and 13 years ago I had some delightful email interactions with him on this (witty & gentle indeed).

Regards, Michael 
Prof. Michael Bach   <https://michaelbach.de>

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