METHOD OF COMPENSATING FOR ABERRATIONS IN ELECTRON HOLOGRAPHY BY USING A LIQUID-CRYSTAL SPATIAL-LIGHT MODULATOR

被引：8

作者：

CHEN, J

LAI, GM

ISHIZUKA, K

TONOMURA, A

机构：

[1] Electron Wavefront Project, Research Development Corporation of Japan, Faculty of Engineering, Toyo University, Saitama

来源：

APPLIED OPTICS | 1994年 / 33卷 / 07期

关键词：

ELECTRON HOLOGRAPHY; ABERRATION CORRECTION; WAVE-ABERRATION FUNCTION; LIQUID-CRYSTAL DEVICE; SPATIAL-PHASE MODULATOR;

D O I：

10.1364/AO.33.001187

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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.

引用

页码：1187 / 1193

页数：7

共 15 条

[1] KINOFORM USING AN ELECTRICALLY CONTROLLED BIREFRINGENT LIQUID-CRYSTAL SPATIAL LIGHT-MODULATOR [J].

AMAKO, J ;

SONEHARA, T .

APPLIED OPTICS, 1991, 30 (32) :4622-4628

[2] DIGITAL WAVEFRONT MEASURING INTERFEROMETER FOR TESTING OPTICAL SURFACES AND LENSES [J].

BRUNING, JH ;

HERRIOTT, DR ;

GALLAGHER, JE ;

ROSENFELD, DP ;

WHITE, AD ;

BRANGACCIO, DJ .

APPLIED OPTICS, 1974, 13 (11) :2693-2703

[3]

Creath K., 1988, Progress in optics. Vol.XXVI, P349, DOI 10.1016/S0079-6638(08)70178-1

[4] ELECTRON GUN USING A FIELD EMISSION SOURCE [J].

CREWE, AV ;

EGGENBER.DN ;

WALL, J ;

WELTER, LM .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1968, 39 (04) :576-&

[5] CORRECTION OF ABERRATIONS OF AN ELECTRON-MICROSCOPE BY MEANS OF ELECTRON HOLOGRAPHY [J].

FU, Q ;

LICHTE, H ;

VOLKL, E .

PHYSICAL REVIEW LETTERS, 1991, 67 (17) :2319-2322

[6] MICROSCOPY BY RECONSTRUCTED WAVE-FRONTS [J].

GABOR, D .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1949, 197 (1051) :454-+

[7] PHASE-ONLY MODULATION WITH TWISTED NEMATIC LIQUID-CRYSTAL SPATIAL LIGHT MODULATORS [J].

KONFORTI, N ;

MAROM, E ;

WU, ST .

OPTICS LETTERS, 1988, 13 (03) :251-253

[8]

KRIVANEK OL, 1976, OPTIK, V45, P97

[9] OPTIMUM FOCUS FOR TAKING ELECTRON HOLOGRAMS [J].

LICHTE, H .

ULTRAMICROSCOPY, 1991, 38 (01) :13-22

[10] ELECTRON HOLOGRAPHY APPROACHING ATOMIC RESOLUTION [J].

LICHTE, H .

ULTRAMICROSCOPY, 1986, 20 (03) :293-304

← 1 2 →