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Applied Optics

Applied Optics


  • Vol. 33, Iss. 7 — Mar. 1, 1994
  • pp: 1187–1193

Method of compensating for aberrations in electron holography by using a liquid-crystal spatial-light modulator

Jun Chen, Guanming Lai, Kazuo Ishizuka, and Akira Tonomura  »View Author Affiliations

Applied Optics, Vol. 33, Issue 7, pp. 1187-1193 (1994)

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A method for correcting the aberration of an electron-objective lens during the holographic reconstruction stage is proposed. In this method, a liquid-crystal spatial-light modulator is used as a computer-controlled phase plate on the Fourier plane of an optical reconstruction system. The effective refractive index of the liquid crystals changes with the applied electric field because of the crystals’s birefringence. Thus the phase of light passing through the liquid-crystal spatial-light modulator can be flexibly modulated to compensate for wave aberration. Experimental results on adjusting the focus of the image wave reconstructed from an electron-image hologram of magnesium oxide particles are presented.

© 1994 Optical Society of America

Original Manuscript: November 30, 1992
Revised Manuscript: June 28, 1993
Published: March 1, 1994

Jun Chen, Guanming Lai, Kazuo Ishizuka, and Akira Tonomura, "Method of compensating for aberrations in electron holography by using a liquid-crystal spatial-light modulator," Appl. Opt. 33, 1187-1193 (1994)

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