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Proceedings Paper

Design of a high-resolution passive millimeter-wavelength camera for security applications
Author(s): Jonathan Drewes; Robert P. Daly
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Paper Abstract

We discuss the methods and design considerations required in engineering a high-resolution camera for use at 94 GHz (~3mm wavelength) to yield the best compromise between optical resolution, field of view, object distance, depth of focus, image acquisition time, and system cost. This application is one in which only the blackbody radiation emitted by the body is a light source, i.e., a passive system. Several critical design parameters were optimized in this design, including, the point spread function size upon the detector array, optical losses, and depth of focus. The metric for characterization of the optical design was the Huygen's wavelet calculation that correlated well with measured performance. Measurements of the PSF and MTF agreed with the model within measurement error. Sample imagery of hidden objects demonstrate that this prototype design is capable of resolving objects with feature sizes as small as 0.50 inch and further show the utility of this millimeter wavelength camera.

Paper Details

Date Published: 29 April 2009
PDF: 12 pages
Proc. SPIE 7309, Passive Millimeter-Wave Imaging Technology XII, 73090B (29 April 2009); doi: 10.1117/12.819364
Show Author Affiliations
Jonathan Drewes, Orlando Optics, LLC (United States)
Brijot Imaging Systems, Inc. (United States)
Robert P. Daly, Brijot Imaging Systems, Inc. (United States)

Published in SPIE Proceedings Vol. 7309:
Passive Millimeter-Wave Imaging Technology XII
Roger Appleby; David A. Wikner, Editor(s)

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