In:
Optics Letters, Optica Publishing Group, Vol. 46, No. 15 ( 2021-08-01), p. 3693-
Abstract:
The orientation mismatch between the cone beam of an X-ray tube and the grating lines in a flat substrate remains a big challenge for laboratory grating-based X-ray interferometry, since it severely limits the imaging field of view. Here, we fabricated fan-shaped G 0 source gratings by modulating the electric field during the deep reactive ion etching of silicon. The gold electroplated fan-shaped G 0 grating (3.0 µm pitch) in a 20 keV interferometer improves the uniformity of the field of view with an increase of average visibility from 16.2% to 18.5% and a better angular sensitivity (by a factor 5.8) at the edges.
Type of Medium:
Online Resource
ISSN:
0146-9592
,
1539-4794
Language:
English
Publisher:
Optica Publishing Group
Publication Date:
2021
detail.hit.zdb_id:
243290-0
Bookmarklink