| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1677339 | Ultramicroscopy | 2016 | 5 Pages |
•Observe the electron beam moiré fringes in large angle of view.•The changes to the fringe direction and the spacing as a function of the rotation angle between the two gratings were examined.•Modulations of the moiré fringes in different rotation angle are recorded.
An image conversion tube with a magnetic lens was designed to observe electron beam moiré fringes. Electron beam moiré fringes result from the interference between the photocathode and the anode meshes. The photocathode had a strip line structure with a spatial frequency of 10 L/mm. The anode mesh had a fixed spatial frequency of 10 L/mm, and could be rotated around the axis of the image tube. The changes to the fringe direction and the spacing as a function of the rotation angle between the photocathode and the anode mesh were examined. The experimental results agreed with the theoretical analysis. Moiré fringes with a modulation of ~20% were obtained using a 3 keV electron beam.
