Collimator grid and an associated method of fabrication

A method, comprising:

• molding a plurality of plates, each plate having a plurality of grooves formed in a first surface, a plurality of fin tips in a second surface disposed opposite to the first surface, each fin tip aligned with the corresponding groove, a plurality of ribs formed on a first pair of peripheral sides, a plurality of first fiducials spaced apart from each other and formed on the plurality of ribs, and a plurality of second fiducials formed on a second pair of peripheral sides;
• machining the second surface of each plate, between the fin tips, to form the plurality of fins having predefined dimensions;
• stacking the plurality of plates overlapping each other based on the plurality of first fiducials such that the plurality of fins of each plate are coupled to the plurality of grooves of the corresponding adjacent plate;
• and
• machining the plurality of ribs and the first fiducials to form a collimator grid.