Share Email Print

Optical Engineering

Image plane coded aperture for terahertz imaging
Format Member Price Non-Member Price
PDF $20.00 $25.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

In the absence of detector arrays, a single pixel coupled with an image plane coded aperture has been shown to be a practical solution to imaging problems in the terahertz and sub-millimeter wave domains. The authors demonstrate two laboratory, real-time, two-dimensional, sub-millimeter wave imagers that are based on an image plane coded aperture. These active imaging systems consist of a heterodyne source and receiver pair, image forming optics, a coded aperture, data acquisition hardware, and image reconstruction software. In one of the configurations, the target is measured in transmission, while in the other it is measured in reflection. In both configurations, images of the targets are formed on the coded aperture, and linear measurements of the image are acquired as the aperture patterns change. Once a sufficient number of linearly independent measurements are obtained, the image is reconstructed by solving a system of linear equations that is generated from the aperture patterns and the corresponding measurements. The authors show that for image sizes envisioned for many current applications, this image reconstruction technique is computationally efficient and can be implemented in real time. Measurements are collected with these systems, and the reconstruction results are presented and discussed.

Paper Details

Date Published: 15 June 2012
PDF: 9 pages
Opt. Eng. 51(9) 091612 doi: 10.1117/1.OE.51.9.091612
Published in: Optical Engineering Volume 51, Issue 9
Show Author Affiliations
Orges Furxhi, The Univ. of Memphis (United States)
Eddie L. Jacobs, The Univ. of Memphis (United States)
Chrysanthe Preza, The Univ. of Memphis (United States)

© SPIE. Terms of Use
Back to Top