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SUMMARY:Do Scanning Electron Microscopes have a point-spread function? - P
 hilipp Hennig
DTSTART:20061108T140000Z
DTEND:20061108T150000Z
UID:TALK5733@talks.cam.ac.uk
CONTACT:Christian Steinruecken
DESCRIPTION:The resolution of diffraction-limited imaging instruments like
  Telescopes and (wide-field) Light Microscopes is fundamentally linked to 
 the image these systems produce of point-like objects\, the so-called poin
 t spread function (psf). Both Astronomy and Biology have profited greatly 
 from methods that try to enhance image quality by de-convolving this funct
 ion out of images.\n \nWhile Electron Microscope (EM) images look very sim
 ilar to conventional light microscope images at first glance and the exist
 ence of a psf for EMs is often implicitly assumed\, it is not clear a prio
 ri whether the imaging defects of EMs can be described by a linear filter 
 (i.e. a psf). \nMonte-Carlo simulations of small\, strongly scattering sph
 eres in a bulk of weakly scattering material give an insight into the form
 ation of single pixels in EM images and may help to enhance their quality.
LOCATION:Ryle Seminar Room\, Cavendish Laboratory
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