US 12,474,490 B2
Multilayer collimator, and method for manufacturing a multilayer collimator
Jukka Hassi, Espoo (FI); Vesa Kulkki, Espoo (FI); Heikki Mikander, Espoo (FI); and Tuomas Pylkkaenen, Espoo (FI)
Assigned to HITACHI HIGH-TECH ANALYTICAL SCIENCE FINLAND OY, Espoo (FI)
Filed by Hitachi High-Tech Analytical Science Finland Oy, Espoo (FI)
Filed on Apr. 4, 2023, as Appl. No. 18/295,702.
Claims priority of application No. 22169353 (EP), filed on Apr. 22, 2022.
Prior Publication US 2023/0341566 A1, Oct. 26, 2023
Int. Cl. G01T 1/20 (2006.01); H10F 39/00 (2025.01)
CPC G01T 1/2002 (2013.01) [G01T 1/2018 (2013.01); H10F 39/806 (2025.01)] 15 Claims
OG exemplary drawing
 
1. A multilayer collimator for a radiation detector, comprising:
a first layer of a first attenuator material of fluorescent X-rays, said first layer having an opening therethrough, and
a second layer of a second attenuator material of fluorescent X-rays, said second layer having an opening therethrough coincident with the opening in said first layer;
wherein said second attenuator material has an atomic mass smaller than the atomic mass of said first attenuator material,
wherein said second layer continues into an extension departing from the plane of said second layer, wherein there is at least one location in said second layer where a normal to the surface of said second layer passes through a part of said first layer and into said extension, for locking said first layer and second layer into an assembled configuration of the multilayer collimator, and
wherein said openings are configured to allow incoming radiation to hit only a desired region of a detector crystal placed adjacent to the multilayer collimator.