Three-dimensional radiometric aperture synthesis microscopy for security screening

Neil A. Salmon; Nick Bowring

doi:10.1117/12.2068202

21 October 2014 Three-dimensional radiometric aperture synthesis microscopy for security screening

Neil A. Salmon, Nick Bowring

Proceedings Volume 9252, Millimetre Wave and Terahertz Sensors and Technology VII; 925204 (2014) https://doi.org/10.1117/12.2068202
Event: SPIE Security + Defence, 2014, Amsterdam, Netherlands

Abstract

The three dimensional (3D) aperture synthesis imaging technique investigated here is a generalisation of the classic twodimensional radio astronomy technique with refinements for the near-field so it can be applied a personnel security screening portal. This technique can be viewed as a novel form of diffraction emission tomography and extends previous 3D aperture synthesis imaging research using matrix inversion techniques [1]. Simulations using three-dimensional Fourier transforms to create three-dimensional images from simulated three-dimensional visibility functions illustrate the Abbe microscopy resolution should be achievable in three dimensions simultaneously in a single sensor. The field-of-view is demonstrated to be limited by Fresnel scale effects and a means to over coming this by processing sub-sets of local visibility functions with different phase centres throughout the imaging volume is presented. The applications of this technique to a full 3D imaging security screening portal is explored and a route to extending simulation software for market driven imaging scenarios is discussed.

Citation Download Citation

Neil A. Salmon and Nick Bowring "Three-dimensional radiometric aperture synthesis microscopy for security screening", Proc. SPIE 9252, Millimetre Wave and Terahertz Sensors and Technology VII, 925204 (21 October 2014); https://doi.org/10.1117/12.2068202

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available