Fig 3. Schematic representation of the imaging set up.

(1) The Intracavity Optical Parametric Oscillator (ICOPO) provides the IR illumination for measurements. The (2) gold coated steering mirror, (3) y-axis galvanometer mirror and (4) x-axis galvanometer mirror are also housed in the NCI system. (5) External gold coated steering mirror, (6) custom built transport chamber, (7) Calcium Fluoride (CaF₂) viewing window all allow for the imaging of the (8) sample, within a sterile environment. The reflected light then retraces its path before passing through a (9) CaF₂ focusing lens and onto the (10) MCT detector.