1.56 Terahertz 2-Frames per Second Standoff Imaging
Abstract
A Terahertz imaging system intended to demonstrate identification of objects concealed under clothing was designed, assembled, and tested. The system design was based on a 2.5 m standoff distance, with a capability of visualizing a 0.5 m by 0.5 m scene at an image rate of 2 frames per second. The system optical design consisted of a 1.56 THz laser beam, which was raster swept by a dual torsion mirror scanner. The beam was focused onto the scan subject by a stationary 50 cm-diameter focusing mirror. A heterodyne detection technique was used to down convert the backscattered signal. The system demonstrated a 1.5 cm spot resolution. Human subjects were scanned at a frame rate of 2 frames per second. Hidden metal objects were detected under a jacket worn by the human subject. A movie including data and video images was produced in 1.5 minutes scanning a human through 180 of azimuth angle at 0.7 increment.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2008
- Accession Number
- ADA482112
Entities
People
- Cecil S. Joseph
- Jason C. Dickinson
- Jerry Waldman
- Kurt J. Linden
- Robert Giles
- Thomas M. Goyette
- William E. Nixon
- William J. Gorveatt
- William R. Neal
Organizations
- University of Massachusetts Lowell