Fig. 1.
(a) Configuration of the experimental setup for single-shot dual-wavelength interferometric measurements. (b) The diffraction pattern caused by two orthogonally aligned gratings illuminated by two different wavelengths at the second Fourier plane (FP2). (c), (d) the non-conventional interference grid. (e), (f) fringe pattern at a single sample spot in conventional IM and novel designs, respectively. The scale bar is 10 µm.