光学学报, 1988, 8 (2): 171, 网络出版: 2011-09-16
非旋转对称像差下不同离焦电子显微像的叠加改善传递函数
Transfer function improvement by means of synthesis of different defocused electron micrographs with unsymmetrical rotational aberrations
摘要
本文提出用不同离焦的高分辨电子显微像光学方法叠加,改善带有非旋转对称像差的电子显微像相位衬度传递的数.使叠加后传递函数在全场区域同相位,并使传递函数的零值由另一传递函数的峰值填补,改善了电子显微像的像质.
Abstract
The different defocused electron micrographs with the unsymmetrical rotational aberrations are synthesized. It makes possible to get a relatively broad distribation of phase contrast transfer function(PCTF). The PCTF in the spatial frequency area has the similar phase and the regions near the zero point of transfer function, which do not transfer information, are filled by other transfer function. The resolution of electron micrograph is improved.
沈晓庆, 李明杰, 郑师海, 李方华. 非旋转对称像差下不同离焦电子显微像的叠加改善传递函数[J]. 光学学报, 1988, 8(2): 171. SHEN XIAOQING, LI MINGJIN, ZHENG SHIHAI, LI FANGHUA. Transfer function improvement by means of synthesis of different defocused electron micrographs with unsymmetrical rotational aberrations[J]. Acta Optica Sinica, 1988, 8(2): 171.
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