A combined microscope and mass spectrometer. This allows for a substance to be both microscopically examined and chemically analyzed at the same time. The map shows optical brightness (height) and chemical distribution of poly(2vinylpyridine) (red) and poly(N-vinylcarbazole) (blue) signals of a 20 micron-by-20 micron area of a polymer blend. (Source: Oak Ridge National Laboratory news. November 6, 2015).