Complex Observation in Electron Microscopy: IV. Reconstruction of Complex Object Wave from Conventional and Half Plane Phase Plate Image Pair

An extension of the Complex Observation series based on a novel imaging mode of the transmission electron microscope (TEM) is presented. A half plane phase plate is used to produce images that exhibit topographic-like appearances and have spectral modulation similar to the modulation of Zernike phase contrast TEM (ZPC-TEM) images. The Differential Interference Contrast (DIC) technique in light microscopy produces a similar contrast. The main difference between the two techniques is the asymmetry in one direction of the spectral modulation of the half plane phase plate images, which causes the topographic-like appearance of these images. The complex form of the object wave can be numerically rebuilt using a properly demodulated half plane phase plate image and a conventional TEM image. Experimental results demonstrating the success of the complex reconstruction scheme are presented.