Collimator Law and Legal Definition

According to 10 CFR 34.3 [Title 10 – Energy; Chapter I -- Nuclear Regulatory Commission; Part 34 -- Licenses for Industrial Radiography and Radiation Safety; Requirements for Industrial Radiographic Operations; Subpart A -- General Provisions], the term collimator means “a radiation shield that is placed on the end of the guide tube or directly onto a radiographic exposure device to restrict the size of the radiation beam when the sealed source is cranked into position to make a radiographic exposure.”