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US 2003/0190013 A1Published application
Scattered ray removal grid and method of producing the same
AssigneeFuji Photo Film Co., Ltd.
InventorKatsuhiro Kohda
Life of this patent
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Abstract
A scattered ray removal grid that has an overall shape of constant spherical curvature. The scattered ray removal grid has radiation absorbing portions arrayed in a lattice configuration and radiation non-absorbing portions made of thermoplastic resin disposed between the radiation absorbing portions and can therefore be easily produced to have an overall spherical shape at low cost.
Claims2
A scattered ray removal grid formed in an overall shape of constant spherical curvature.
A method of producing a scattered ray removal grid comprising:
- a step of forming a plate-like grid having thermoplastic resin interposed between grid elements and placing the plate-like grid between a set of dies having surfaces of complementary spherical curvature of prescribed radii,
- a step of 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, and
- a step of cooling the grid formed in a spherical shape.
Dependencies are inferred from the claim text.