Fig. 3
From: All-optical complex field imaging using diffractive processors
Performance analysis of the diffractive complex field imager model shown in Fig. 2. a Imaging results using phase-only gratings as input fields. The binary phase grating patterns encoded within the phase channel of the input objects are shown and compared with the resulting output amplitude and phase images produced by our diffractive imager (i.e., \(\left|{o}_{{\rm{Amp}}}\left(\lambda \right)\right|\) and \({O}_{{\rm{Phase}}}\)). For each diffractive output image, the grating image contrast Q and SCR values were quantified and shown in red and blue numbers, respectively. b Same as in a, except that the amplitude-only gratings are used as input fields. c Imaging results using complex grating objects as input fields. These grating test objects include ones with the same grating patterns encoded in both the amplitude and phase channels (top), as well as ones where horizontal and vertical gratings are orthogonally placed, with one encoded in the phase channel of the input field and the other encoded in the amplitude channel (bottom)
