"X ray optics." . . . . "Lenses." . . "Silicon." . . "Etching." . . "Microchannel plates." . . "Micromachining." . . . . . "Development of microchannel plate X-ray optics annual status report for NAGW-2721, 1 July 1993-30 June 1994"@en . . . . . . . . . . . . . . . . . . . .