We consider the design of a Kirkpatrick-Baez grazing-incidence X-ray telescope to be used in a scan of the sky and analyze the distribution of both properly reflected rays and spurious images over the field of view. To obtain maximum effective area over the field of view, it is necessary to increase the spacing between plates for a scanning telescope as compared to a pointing telescope. Spurious images are necessarily present in this type of lens, but they can be eliminated from the field of view by adding properly located baffles or collimators. Results of a computer design are presented.
John W. Kast, "Scanning Kirkpatrick-Baez X-Ray Telescope to Maximize Effective Area and Eliminate Spurious Images; Design," Appl. Opt. 14, 537-545 (1975)