Sampling and Processing in Optical Imaging and Spectroscopy

David Brady
Duke University

Monday, April 27, 2009 at 1:00PM
54-134 Engineering IV Building
Refreshments Served

Abstract: Optical sensors design has been radically transformed in the past five years. Where the goal of conventional imagers was to form an image on a focal plane, modern design views optical elements and optoelectronic interfaces as coding channels which one may optimize for information transfer without necessarily forming a physical image. Of course, multiplex coding strategies have long been considered in Fourier transform and Hadamard spectroscopy, but even spectroscopic systems have been transformed as compressive sampling and nonlinear estimation strategies have been applied. This talk describes generalized sampling strategies as implemented in systems designed by the Duke Imaging and Spectroscopy Project, focusing in particular on strategies to enable novel sensor functions, such as snapshot hyperspectral imaging, or to improve sensor metrics, such as reducing system volume and mass or increasing pixel count. The talk also discusses emerging optical component designs leveraging both mathematical advances in generalized sampling and nonlinear estimation and physical advances in wafer-based lens assembly and metamaterials.

Biography: David J. Brady is Professor of Electrical and Computer Engineering at Duke University, where he leads the Duke Imaging and Spectroscopy Program. Professor Brady has developed numerous computational optical imaging and spectroscopy systems. His invention of multimodal multiplex spectroscopy was awarded a 2006 R&D 100 award. He is also the author of "Optical Imaging and Spectroscopy," which will be released in April 2009 by OSA-Wiley. Prior to joining the Duke Faculty, Brady was on the faculty of the University of Illinois. He earned a B. A. in physics and math from Macalester College and M.S. and Ph. D. degrees in Applied Physics from the California Institute of Technology. Brady is also Chief Scientist and member of the Board of Directors at Centice Corporation, which manufactures Raman pharmaceutical analysis systems, and is Chief Scientist and Chairman of the Board of Directors at Applied Quantum Technologies, which manufactures spectral imaging systems. Brady is a fellow of OSA, SPIE and IEEE.