Lei Dan, Mitsuishi Kazutaka, Harada Ken, Shimojo Masayuki, Ju Dongying, Takeguchi Masaki
Department of Materials Science and Engineering, Saitama Institute of Technology, 1690 Fusaiji, Fukaya, Saitama 369-0293, Japan.
Microscopy (Oxf). 2013 Dec;62(6):563-70. doi: 10.1093/jmicro/dft032. Epub 2013 May 24.
We present an electron holography technique to acquire an interferogram, that is, cosine image of phase distribution. The interferogram is constructed by shifting the specimen in one direction with a stage-scanning system and acquiring line intensities of holograms. Taking line intensities eliminates the carrier fringes in the holograms and yields the interferogram. Under phase object approximation, the object phase can be readily obtained from the interferogram without any reconstruction procedure. The spatial resolution of phase is determined independently of the fringe spacing, overcoming the limitation of conventional techniques based on the Fourier transformation method.
我们提出了一种电子全息技术来获取干涉图，即相位分布的余弦图像。干涉图是通过使用平台扫描系统在一个方向上移动样品并获取全息图的线强度来构建的。获取线强度消除了全息图中的载波条纹并产生干涉图。在相位物体近似下，无需任何重建过程就可以从干涉图中轻松获得物体相位。相位的空间分辨率是独立于条纹间距确定的，克服了基于傅里叶变换方法的传统技术的局限性。
