Figure 2. Effects of pixel size and illumination bandwidth on lensfree image reconstruction quality.

(a and b) Effects of under-sampling and (a and c) lack of temporal coherence for lensfree holographic on-chip microscopy. (c and d) The use of pixel super resolution to overcome spatial under-sampling. The cross-sections along the first diffraction orders together with the recovery results demonstrate the effects of spatial sampling rate and spectral bandwidth on image quality.