Figure 5
(a) Lens-free imaging using synthetic aperture and lateral shift-based pixel super-resolution. At each illumination angle, 6 × 6=36 sub-pixel lateral shifts, which are spread evenly over the pixel area, are used for super-resolution. (b) Lens-free imaging using synthetic aperture and wavelength-scanning pixel super-resolution. Twelve wavelengths are used within a scanning range of 480–513 nm and a scan step of 3 nm. The illumination angle scanning directions, ranges and scanning steps are the same in both a and b. (c) Image of the specimen obtained using a conventional lens-based microscope with a 60 × water-immersion objective lens (NA=1.0).
