Figure 1: Optical setup.

(a) The SLIM add-on module uses a 4-f system and a SLM coupled to the output port a phase-contrast microscope. A camera is placed at the output of the module to record the interference intensity. Post-processing is performed on a computer to recover the phase quantity of interest. (b) Positive PC image of mouse neurons imaged using a 20x/0.3 NA objective. (c) Positive hfPC image. (d,e) Zoomed-in image of the regions boxed by the rectangle in (b) and (c) respectively.