May 2004 issue
Cover illustration: False-colour CCD image taken in the focal plane of two crossed prism lenses, of the type shown at the bottom left, see Jark, Pérennès, Matteucci, Mancini, Montanari, Rigon, Tromba, Somogyi, Tucoulou and Bohic, pages 248-253. These lenses were produced at the deep X-ray lithography beamline of ELETTRA, and the CCD image was taken at the SYRMEP beamline at ELETTRA. The vertically and horizontally focusing lenses and their supports are seen as blue shadows in the yellow beam. The saturated white spot is the focus, in which an intensity gain of 25 is obtained (see the vertical and horizontal beam profiles).