Multilayer collimator, and method for manufacturing a multilayer collimator

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.