Stefan W. Hell is a director at the Max Planck Institute for Biophysical Chemistry in Göttingen, Germany, and also leads a research division at the German Cancer Research Center (DKFZ) in Heidelberg. He is credited with having conceived, validated and applied the first viable concept for breaking Abbe's diffraction-limited resolution barrier in a light-focusing microscope.
Hell was unable to attend SPIE Photonics West 2015, but participated in the Nobel plenary session by contributing this video, which includes an edited version of his Nobel acceptance speech.
Hell received the 2014 Nobel Prize in Chemistry, along with Eric Betzig and W.E. Moerner, for their development of super-resolved fluorescence microscopy.
Stefan W. Hell, "Nobel acceptance highlights (Conference Presentation)," Proc. SPIE 9331, Single Molecule Spectroscopy and Superresolution Imaging VIII, 93311F (Presented at SPIE BiOS: 22 April 2015; Published: 22 April 2015); https://doi.org/10.1117/12.2197199.
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