Condenser for Koehler-like illumination in transmission x-ray microscopes at undulator sources.
We report on a novel condenser for full-field transmission x-ray microscopes that use synchrotron radiation from an undulator source. The condenser produces a Koehler-like homogeneous intensity distribution in the sample plane and eliminates object illumination problems connected with the high degree of spatial coherence in an undulator beam. The optic consists of a large number of small linear diffraction gratings and is therefore relatively easy to manufacture. First imaging experiments with a prototype condenser were successfully performed with the Twinmic x-ray microscope at the Elettra synchrotron facility in Italy.
Vogt
Ulrich
U
Biomedical and X-ray Physics, Royal Institute of Technology/Albanova, Stockholm, Sweden. ulrich.vogt@biox.kth.se
Lindblom
Magnus
M
Charalambous
Pambos
P
Kaulich
Burkhard
B
Wilhein
Thomas
T