Graduate Exam Abstract
March 25, 2011, 11:00 AM
Spatial Frequency Modulated Single Detector Imaging
Abstract: This thesis presents images of absorbing and fluorescent objects captured by modulating a time varying spatial frequency to an illumination beam. The technique collects images on the area of a single-element photodetector and recovers the image in the frequency domain of the detectors electronic signal. This imaging modality offers the possibility of relatively simple and high speed imaging of objects with an inexpensive detector. The modulator can be produced at low cost by printing a mask onto a clear CD-ROM substrate. The theory developed explains how the parameters of the modulator and optical system relate to the resolution and number of points in the image. Numerical simulations are used to explore the optical limits in the presence of aberrations. Experimental results verify theoretical relations and the results include absorption and fluorescent images.
Adviser: Randy Bartels
Non-ECE Member: David Krueger, Physics
Member 3: Ali Pezeshki, ECE
Addional Members: Peter Young
G. Futia, P. Schlup, D. G. Winters, and R. A. Bartels, "Spatially-chirped
modulation imaging of absorption and fluorescent objects on single-element
optical detector," Optics Express, vol. 19, pp. 1626-1640, Jan. 2011.
Program of Study: