Figure 2: Fringe of equal chromatic order detected using a combination of Andor Zyla 5.5 sCMOS camera and Shamrock 500 spectrograph. A) Interferogram indicating two adjacent mica surfaces in contact, i.e. the surfaces are pressing against each other leading to a flattening of the contact geometry. B) The same adjacent surfaces at a separation D &gt;&gt; 0, where
Figure 2: Fringes of equal chromatic order detected using a combination of Andor Zyla 5.5 sCMOS camera and Shamrock 500 spectrograph. A) Interferogram indicating two apposing mica surfaces in contact, i.e. the surfaces are pressing against each other leading to a flattening of the contact geometry. B) The same apposing surfaces at a separation D &gt;&gt; 0, where the surfaces are not interacting and are hence in their original round shape