Abstract
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
Full Article | PDF ArticleMore Like This
Jun Chen, Tsukasa Hirayama, Kazuo Ishizuka, and Akira Tonomura
Appl. Opt. 33(28) 6597-6602 (1994)
Kapil Dev, Vijay Raj Singh, and Anand Asundi
Appl. Opt. 50(11) 1593-1600 (2011)
Hidetomo Takahashi, Satoshi Hasegawa, and Yoshio Hayasaki
Appl. Opt. 46(23) 5917-5923 (2007)