Grid and method of manufacturing such grid

Apparatus for providing a grid for use in collimating incident radiation, said apparatus comprising:

• a plurality of laminations, each of which is relatively opaque to said radiation and has planar horizontally oriented top and bottom surfaces, all of said laminations being arranged in a spaced-apart vertically stacked configuration and oriented such that successive ones of the laminations have a pre-defined spacing therebetween, so as to define a plurality of spacings, with the planar surfaces of said laminations being horizontally parallel both to each other and to a direction of said incident radiation,
• a plurality of guides, each of which has a vertical length, distributed horizontally along a length of each of said laminations perpendicular to the direction of the incident radiation, wherein each of the guides longitudinally extends in a vertical direction perpendicular to both the planar surfaces of the laminations and to the incident radiation,
• a frame, affixed to top and bottom portions of said guides, and positionable and fixable to said guides along said perpendicular direction;
• each of the guides having a plurality of reference faces formed therein distributed along the vertical length thereof wherein a predefined number of spacers are receivable between successive ones of the reference faces, each of said laminations being abuttingly situated between a different predefined corresponding pair of said spacers;
• and
• wherein the laminations and the spacings therebetween collectively form the grid.