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Simple microscope using a compound refractive lens and a wide-bandwidth thermal neutron beam

  • Author(s): Cremer, J. T.
  • Park, H.
  • Piestrup, M. A.
  • Gary, C. K.
  • Pantell, R. H.
  • Flocchini, R. G.
  • Egbert, H. P.
  • Kloh, M. D.
  • Walker, R. B.
  • et al.
Abstract

The results of imaging experiments using biconcave, spherical compound refractive lenses (CRLs) and a wide-bandwidth thermal neutron beam are presented. Two CRLs were used, consisting of 155 beryllium and 120 copper lenses. The experiments were performed using a thermal neutron beam line at McClellan Nuclear Radiation Center reactor. The authors obtained micrographs of cadmium slits with up to 5× magnification and 0.3 mm resolution. The CRL resolution was superior to a pinhole camera with the same aperture diameter. The modulation transfer function (MTF) of the CRL was calculated and compared with the measured MTF at five spatial frequencies, showing good agreement. ©2007 American Institute of Physics

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