SPHERICAL-ABERRATION CORRECTION USING A LIQUID-CRYSTAL SPATIAL-LIGHT MODULATOR IN OFF-AXIS ELECTRON HOLOGRAPHY

One can correct spherical aberration in a transmission electron micros cope by using a newly developed aberration-correction method involving off-axis electron holography. In this method, a liquid-crystal spatia l-light modulator (LC SLM) is employed during the holographic reconstr uction step to compensate for spherical aberration. Application of thi s method to high-resolution off-axis electron holograms of fine gold p articles is presented. The phase distribution of the corrected object wave is visualized by the Zernike phase-contrast method carried out wi th the same LC SLM.