Schematic of the compact experimental setup along with the details of hyperspectral camera used in this study. ( ) The experimental arrangement used to record the hyperspectral interferograms. Here the camera, the lens and the light are vertically above the thin film. Further details are available in previously published works . ( ) Details of the fabry-perot filter array inside the snapshot hyperspectral camera. Each fabry-perot filter in the repeating filter array unit is numbered according to the ascending order of the peak wavelengths of the filters in that unit. ( ) Five slices from the HSI cube showing the inteferograms obtained from a bubble in a silicone oil mixture along with two RGB composites generated by combining bands 1,8,16 and bands 4,12,16. The colormaps corresponding to the RGB composites are shown alongside. Such RGB composites are useful for visualizing hyperspectral interferograms, and in this case also qualitatively illustrates how hyperspectral imaging can overcome the non-uniqueness between film thickness and color associated with the traditional RGB interferometry.
展开▼
