title: Refractive microlens array for wave-front analysis in the medium to hard x-ray range.
abstract: We report an alternative approach to x-ray wave-front analysis that uses a refractive microlens array as a Shack-Hartmann sensor. The sensor was manufactured by self-assembly and electroplating techniques and is suitable for high-resolution wave-front analysis of medium to hard x rays. We demonstrate its effectiveness at an x-ray energy of 3 keV for analysis of x-ray wave-front perturbations caused by microscopic objects. The sensor has potential advantages over other methods for x-ray phase imaging and will also be useful for the characterization of x-ray beams and optics.
authors.affiliation: Commonwealth Scientific and Industrial Research Organisation, Manufacturing and Infrastructure Technology, Private Bag 33, Clayton South, Victoria 3169, Australia. sherry.mayo@csiro.au
authors.forename: Sheridan C
authors.initials: SC
authors.lastname: Mayo
authors.forename: Brett
authors.initials: B
authors.lastname: Sexton