Fig. 3.

A comparison of reconstructed phase images that are acquired using a raw lensfree hologram vs. the super-resolution hologram shown in Fig. 2 is provided for a micro-pattern that is etched in glass. A 40× bright-field microscope image of the same pattern is also provided for comparison. A cross-section of the phase image across the letter “L” and its 1D spatial derivative demonstrates the resolution to be <1 μm. The spacing between the letters “U” and “C” in this etched pattern is 1 μm, and the two letters are clearly resolved using the super-resolution microscope further supporting sub-micron resolution.