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Proceedings Paper

Aberration correction by electron holography using a liquid crystal spatial-light modulator
Author(s): Jun Chen; Guanming Lai; Kazuo Ishizuka; Akira Tonomura
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Paper Abstract

Electron holography has a potential to overcome the resolution limitation of transmission electron microscopes imposed by a spherical aberration of an electron objective lens. This paper describes a new optical system a liquid-crystal spatial-light modulator (LC-SLM) to correct a spherical aberration from an off-axis electron hologram. The effective refractive index of the liquid crystals changed by the applied electric field can flexibly compensate for a wave aberration. Some experimental results involving the correction of the spherical aberration in an off-axis image electron hologram are presented. Zernike phase contrast method is also realized by the LC-SLM to visualize the phase distribution of a corrected object wave.

Paper Details

Date Published: 3 September 1993
PDF: 5 pages
Proc. SPIE 1889, Holography, Interferometry, and Optical Pattern Recognition in Biomedicine III, (3 September 1993); doi: 10.1117/12.155730
Show Author Affiliations
Jun Chen, Research Development Corp. of Japan (Japan)
Guanming Lai, Research Development Corp. of Japan (Japan)
Kazuo Ishizuka, Research Development Corp. of Japan (Japan)
Akira Tonomura, Research Development Corp. of Japan (Japan)


Published in SPIE Proceedings Vol. 1889:
Holography, Interferometry, and Optical Pattern Recognition in Biomedicine III
Halina Podbielska, Editor(s)

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