Spectroscopic gas-flow imaging through an infrared optical fiber bundle

Spectroscopic imaging was achieved in the midinfrared region by using a PtS i charge coupled device camera and band-pass filters. A coherent bundle of chalcogenide glass fibers was used as an infrared image guide to realize th e remote observation of inaccessible objects. Infrared images taken at 1/60 s intervals represented transient distributions of molecules that absorb t he probe infrared light. Real-time observation of bursting CH4 and CO2 gase s was successfully demonstrated. (C) 1999 American Institute of Physics. [S 0034-6748(99)00811-4].