| 用Linfoot象质评价理论研究高分辨电子显微镜依赖失焦的象质 |
| |
| 引用本文： | 沈晓庆. 用Linfoot象质评价理论研究高分辨电子显微镜依赖失焦的象质[J]. 物理学报, 1989, 38(3): 516-522 |
| |
| 作者姓名： | 沈晓庆 |
| |
| 作者单位： | 上海机械学院 |
| |
| 摘 要： | 本文用Linfoot象质评价函数对弱相位物体成象高分辨电子显微镜的失焦特性作了研究。测量厚度为10nm的无定形非晶碳膜的高分辨电子显微象功率谱,从而确定相对结构容量分布,并从理论计算上进行了证实,据此对保真度相关量及未知晶体成象和自动聚焦作了讨论。关键词：
|
| 关 键 词： | 电镜 失焦 象质 高分辨 |
| 收稿时间： | 1988-03-30 |
A STUDY ON IMAGE QUALITY DEPENDING ON DEFOCUSING HREM WITH IMAGE QUALIFICATION THEORY OF LINFOOT |
| |
| SHEN XIAO-QING. A STUDY ON IMAGE QUALITY DEPENDING ON DEFOCUSING HREM WITH IMAGE QUALIFICATION THEORY OF LINFOOT[J]. Acta Physica Sinica, 1989, 38(3): 516-522 |
| |
| Authors: | SHEN XIAO-QING |
| |
| Abstract: | Using image qualification theory of Linfoot, we studied the deforcusing character of imaging of weak phase object in HREM. The power spectrum of electron micrographs of an amorphous carbon thin foil specimen of 10 μm thick is measured from which the distribution of the relative structral content is determined. It is further verified by numerical analysis. The correlation factor, the image fidelity, the choice of the defocus amount in the electron microscope for the unkown crystal objects and automatic focusing is discussed. |
| |
| Keywords: | |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《物理学报》浏览原始摘要信息 |
|
点击此处可从《物理学报》下载免费的PDF全文 |
|
