Mine detection using instantaneous spectral imaging

Michael R. Descour; Eustace L. Dereniak; Abinash C. Dubey

doi:10.1117/12.211325

20 June 1995 Mine detection using instantaneous spectral imaging

Michael R. Descour, Eustace L. Dereniak, Abinash C. Dubey

Proceedings Volume 2496, Detection Technologies for Mines and Minelike Targets; (1995) https://doi.org/10.1117/12.211325
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

Abstract

The performance of a temporally and spatially nonscanning imaging spectrometer is examined in the context of mine detection. The instrument is described in terms of computed- tomography concepts, specifically the central-slice theorem. The critical system element is a sequence of three transmission sinusoidal-phase gratings rotated in 60 degree increments which achieve dispersion in multiple directions and into multiple orders. The dispersed images of the system's fieldstop are interpreted as 2D projections of a 3D object cube. Due to finite focal-plane array size, this computed-tomography imaging spectrometer (CTIS) is an example of a limited-view-angle tomographic system. The imaging spectrometer's point-spread- function is measured experimentally as a function of wavelength and position in the field-of- view. Reconstruction of the object cube is then achieved via the Maximum-Likelihood Expectation-Maximization algorithm under the assumption of a Poisson likelihood law. The CTIS was tested in five experiments, each experiment utilizing a different target scene displayed on a video monitor. The five target scenes were: a 'University of Arizona' target, two minefield scenes (based on field data) including a simulated mine-like object produced by a HeNe-laser beam-print, and two minefield scenes including a simulated mine-like object produced by a laser-diode beam-print. In all five cases, the CTIS yielded accurate spatial and spectral signatures of the mine-like targets.

Citation Download Citation

Michael R. Descour, Eustace L. Dereniak, and Abinash C. Dubey "Mine detection using instantaneous spectral imaging", Proc. SPIE 2496, Detection Technologies for Mines and Minelike Targets, (20 June 1995); https://doi.org/10.1117/12.211325

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