Author/Authors :
Kuramochi، نويسنده , , Koji and Yamazaki، نويسنده , , Takashi and Kotaka، نويسنده , , Yasutoshi and Kikuchi، نويسنده , , Yoshio and Hashimoto، نويسنده , , Iwao and Watanabe، نويسنده , , Kazuto، نويسنده ,
Abstract :
By using a low-order zone-axis ronchigram of a crystalline sample, a simple method for measuring twofold astigmatism of a probe-forming lens is proposed. This method allows precise measurement of the value of astigmatism from only one experimental ronchigram.
Keywords :
Astigmatism , STEM , Lens aberration function , Ronchigram
