Fig. 6: MIR images of various materials accompanied with corresponding FTIR spectra.
From: Infrared chemical imaging through non-degenerate two-photon absorption in silicon-based cameras
The left column shows resonance MIR images, whereas the middle column shows MIR images taken at an energy that corresponds with a designated absorptive line. The right column displays the FTIR absorption spectra of the sample with on (orange) and off (grey) resonance frequencies indicated. a Interface between D2O and silicone lubricant. b APPPO polymer film. c Wing of a common bee. The exposure time for all images is 1 s
