|At Last - A Visual-Light "Scanning Electron" Microscope for Viewing Rough Surfaces !
Focus is designed to select the sharpest portions of each image in a
stack of microscope images made at different object distances. It
compresses the stack into a montage that eliminates the out-of-focus
portions, giving a high resolution photomicrograph.
was teaching a metallurgical failure analysis course at Drexel
University ca. 1980, I collected "unknowns" by picking them up from the
streets while walking around the university. The students knew
this, and they knew that I had no more advance knowledge about the
history of the the broken pieces than they did. Some of the
examples below fall in that category.