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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 17 — Aug. 22, 2005
  • pp: 6572–6586

Multi-spectral mid-infrared laser stand-off imaging

Yi Wang, Yang Wang, and Han Q. Le  »View Author Affiliations


Optics Express, Vol. 13, Issue 17, pp. 6572-6586 (2005)
http://dx.doi.org/10.1364/OPEX.13.006572


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Abstract

A multi-spectral mid-IR laser imaging study including system engineering, experiments, and image processing and analysis is described. A 4-λ scalable system was built with semiconductor lasers, covering from 3.3-9.6 μm. The X-Y scanning system was capable of 2-dimensional (2D) multi-spectral imaging at a stand-off distance from 13-40 m. The system was applied to diverse targets that consist of man-made and natural materials and objects, and shown capable to resolve and distinguish small spectral differences among the various targets. Colorless objects in the visible were shown with “colorful” signatures in the mid-IR. Image processing algorithm based on spectral contrast was shown most effective to exploit the laser sensitivity and accuracy, as opposed to algorithms that operate mainly on the image spatial intensity. The results also showed the complexity of laser imaging phenomenology, involving both spectroscopic and geometrical scattering effects. A demonstration of 3D multi-spectral imaging was also given. The system design is suitable for compact packages with semiconductor lasers, and the results suggest that laser-based multi-spectral imaging can be a unique and powerful technology for target discrimination.

© 2005 Optical Society of America

OCIS Codes
(100.0100) Image processing : Image processing
(110.0110) Imaging systems : Imaging systems
(110.3080) Imaging systems : Infrared imaging
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.5960) Lasers and laser optics : Semiconductor lasers
(150.6910) Machine vision : Three-dimensional sensing
(280.3420) Remote sensing and sensors : Laser sensors
(280.3640) Remote sensing and sensors : Lidar
(300.6340) Spectroscopy : Spectroscopy, infrared
(330.6180) Vision, color, and visual optics : Spectral discrimination

ToC Category:
Research Papers

History
Original Manuscript: June 6, 2005
Revised Manuscript: August 12, 2005
Published: August 22, 2005

Citation
Yi Wang, Yang Wang, and Han Le, "Multi-spectral mid-infrared laser stand-off imaging," Opt. Express 13, 6572-6586 (2005)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-13-17-6572


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