We describe a point-focusing x-ray lens made of a rolled polyimide film with etched prisms. The resulting lens is a cylinder with a large number of prisms forming an internal conic structure. The method allows for the manufacturing of lenses with large apertures and short focal lengths, for energies up to at least 100 keV. In order to evaluate the concept, we have hand-rolled a few lenses and evaluated them at a synchrotron source. The measured performance of the prototype is promising, and deviations from the theoretical limits are quantitatively explained.
© 2011 Optical Society of America
Original Manuscript: October 5, 2010
Revised Manuscript: January 3, 2011
Manuscript Accepted: January 7, 2011
Published: February 14, 2011
Vol. 6, Iss. 3 Virtual Journal for Biomedical Optics
Peter Nillius, Staffan Karlsson, Björn Cederström, Erik Fredenberg, and Mats Danielsson, "Large-aperture focusing of high-energy x rays with a rolled polyimide film," Opt. Lett. 36, 555-557 (2011)