| 摘要 |
<p>This invention concerned generally with x-ray and neutron beam instrumentation, and in particular relates to the focusing and collimation of x-rays or neutrons. In one embodiment the invention comprises an x-ray or neutron instrument incorporating x-ray or neutron lens means disposed in a path for x-rays or neutrons in the instrument, the lens means comprising multiple elongate open-ended channels arranged across the path to recieve and pass segments of an x-ray or neutron beam occupying said path, which channels have side walls reflective to x-rays or neutrons of said beam incident at a grazing angle less than the critical grazing angle for total external reflection of the x-rays or neutrons, whereby to cause substantial focusing or collimation of the thus reflected x-rays or neutrons, wherein said channels are of a quadrilateral cross-section.</p> |
