Patent ID: 6801600
Filing Date: 2004-10-05
Classification: G21K,Y10T

Abstract:
A scattered ray removal grid formed in an overall shape of constant spherical curvature, prepared by a process comprising:forming a substantially flat-shaped grid having thermoplastic resin interposed between grid elements; placing the grid between a set of dies having surfaces of complementary spherical curvature of prescribed radii, and causing the set of dies to form the grid into a shape having spherical curvature of a prescribed radius by pressing and heating the grid to its softening temperature, wherein the step of forming the substantially flat-shaped grid includes: forming a laminate by alternately stacking and bonding layers of scattered ray absorbers and spacers; slicing an end portion of the laminate perpendicularly to a stacked direction of the layers so that the scattered ray absorbers lie parallel to one another; forming a second laminate by alternately layering the sliced end portions of the laminate with radiation absorption plates to form a lattice structure; and slicing an end portion of the second laminate perpendicularly to a stacked direction of the layers to form the substantially flat-shaped grid.