Photothermal Common-path Interferometry absorptance test applies to a single surface and comprises of Longitudinal-, Transverse- and Time-Scans. PCI is based on a spatially resolved pump-probe technique: a low-power probe beam senses the heating effect of an absorbed pump beam and is regarded for low absorption measurements. The probe beam interferes with itself and measures the phase shift of the wavefronts.
This test includes 2D mapping of a surace are
Presets:
PCI 2D Area Scan Test
1D + 2D surface absorption