METAL X-RAY GRID, X-RAY IMAGING DEVICE, AND PRODUCTION METHOD FOR METAL X-RAY GRID
FIG2 is a cross-sectional view taken along a line II-II of FIG1
Further, in the metal grid 1A of the embodiment, the principal surface 13a of the X-ray receiving portion 13 of the member 10 is curved. Also in the production method of the embodiment, the principal surface 13a of the X-ray receiving portion 13 of the member 10 is curved. Accordingly, the extension direction of the X-ray passing region is also slightly inclined in accordance with the curvature of the principal surface 13a. Thus, it is possible to decrease the relative angle between the traveling direction of the X-rays XL incident to the X-ray passing region and the extension direction of the X-ray passing region when receiving the X-rays XL radially spreading from the dot-shaped X-ray source (see FIG2) regardless of the distance from the center of the metal grid 1A by setting the curvature of the principal surface 13a in accordance with the distance from the X-ray source. Thus, according to the metal grid 1A and its production method of the embodiment, it is possible to obtain a desired function even at a position far from a center and to further widen an area of the metal grid where the X-rays XL are incident.
cross-sectional view
51
outer edge
14
flange portion flange portions
52
inner edge
50
frame portion frame portions
10
metal plate
13
X-ray receiving portion
['1. A metal X-ray grid comprising: a valve metal plate which includes a curved principal surface; an anodic oxide film which is formed on the principal surface of the valve metal plate; and a lattice structure which has an uneven shape periodically formed on the anodic oxide film.', '3. The metal X-ray grid according to claim 1 or 2, further comprising: at least one of a frame portion which supports a peripheral edge portion of the valve metal plate and a support substrate which is affixed to the valve metal plate and supports the valve metal plate.']