Figure 4

OCT image of a GiftWrap Scotch adhesive tape using (a) the low-cost LF-FD-OCT and (b) an in-house SD-OCT developed with a commercial spectrometer. The scale bar in each of the images represents 500 µm.

OCT image of a GiftWrap Scotch adhesive tape using (a) the low-cost LF-FD-OCT and (b) an in-house SD-OCT developed with a commercial spectrometer. The scale bar in each of the images represents 500 µm.