Seminars

# Coherent Diffraction Imaging and Its Application in Materials Science and Biology

## by John Miao (University of California, Dept. of Physics & Astronomy and the California NanoSystems Institute, L.A.)

Tuesday, June 28, 2011 from to (Europe/Berlin)
at Bldg 25f, Room 456
 Description For centuries, lens-based microscopy, such as light, phase-contrast, fluorescence, confocal and electron microscopy, has played an important role in the evolution of modern sciences and technologies. In 1999, a novel form of microscopy, i.e. coherent diffraction microscopy (also termed coherent diffraction imaging or lensless imaging) was developed and transformed our traditional view of microscopy, in which the diffraction pattern of a non-crystalline object is first measured and then directly phased to obtain an image. The well-known phase problem is solved by combining the oversampling method with iterative algorithms. In this talk, I will mainly present some of our recent results on coherent diffraction imaging of materials science and biological samples. At the end of my talk, I will discuss a novel 3D imaging technique denoted ankylography, and show some recent results by using an optical laser.