Schematic diagram of the micro-visualization setup.

The micro-visualization system allows optical imaging with a spatial resolution of 5 μm but a working distance of up to 10 cm, distinguishing it from conventional microscopes that require very small working distances to obtain high magnification.

Zhang F.Y., Spernjak D., Prasad A.K., and Advani S.G., "In situ characterization of the catalyst layer in a polymer electrolyte membrane fuel cell," Journal of the Electrochemical Society, Vol. 154, pp. B1152-B1157, September 12, 2007. doi:10.1149/1.2777987