Figure 5
From: Scatter-plate microscope for lensless microscopy with diffraction limited resolution
Imaging of a complex biological sample. The narrow band light source helps to reduce the noise considerably. At the same time, correlation based spatial averaging reduces the speckle noise in the reconstructed images. (a) and (b) are conventional microscope images of the central part of the pine-wood stem under monochromatic and white light illumination. White light image is marred by the blurs caused by chromatic aberrations and low contrast. (c) The scatter-plate microscope image with considerably less noise and high contrast. Two miniature features are encircled by dashed rectangles and their corresponding cross-sectional plots are shown in the inset on the right side. Note that the structures in Fig. 4 and this image are from different regions of the stem. The central region has discrete structures and is more absorbing. That is why the background light level is low here. For better presentation the signal levels have been normalized in this case. The scale bar is 10 µm.
