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Applied Optics

Applied Optics


  • Vol. 23, Iss. 15 — Aug. 1, 1984
  • pp: 2565–2571

Imaging CO2 laser radar field tests

Jon Y. Wang, Bruce J. Bartholomew, Maurie L. Streiff, and Earl F. Starr  »View Author Affiliations

Applied Optics, Vol. 23, Issue 15, pp. 2565-2571 (1984)

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A coherent imaging CO2 laser radar has been built and field tested. It collects reflectance and range images from amplitude and phase measurements. Statistical analysis indicates Rayleigh distribution in the reflectance data from a military truck, the dirt ground, and an asphalt road. The reflectivities of these objects are determined to be <2.5%, obtained by comparison with laboratory reflectometer measurements.

© 1984 Optical Society of America

Original Manuscript: November 5, 1983
Published: August 1, 1984

Jon Y. Wang, Bruce J. Bartholomew, Maurie L. Streiff, and Earl F. Starr, "Imaging CO2 laser radar field tests," Appl. Opt. 23, 2565-2571 (1984)

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  1. M. C. Teich, “Homodyne Detection of Infrared Detection from a Moving Diffuse Target,” Proc. IEEE 57, 786 (1969). [CrossRef]
  2. See, for example, “Heterodyne Systems and Technology,” NASA Conference Publication 2138 (Mar.1980).
  3. R. C. Harney, R. J. Hull, “Compact Infrared Radar Technology,” Proc. Soc. Photo-Opt. Instrum. Eng. 227, 162 (1980).
  4. J. W. Goodman, “Statistical Properties of Laser Speckle Patterns,” in Laser Speckle and Related Phenomena, J. C. Dainty, Ed. (Springer, New York, 1975). [CrossRef]
  5. J. Y. Wang, “Heterodyne Laser Radar SNR from a Diffuse Target Containing Multiple Glints,” Appl. Opt. 21, 464 (1982). [CrossRef] [PubMed]
  6. J. Y. Wang, P. A. Pruitt, “Laboratory Target Reflectance Measurements for Coherent Laser Radar Applications,” Appl. Opt. 23, 2559 (1984). [CrossRef] [PubMed]
  7. In our laboratory reflectometer measurements presented in Ref. 6, a narrowband filter was placed in front of the detector to block unwanted radiation. An air-cooled CO2 waveguide laser (manufactured by California Laser, Inc.) was used in the earlier experiments. It was later discovered that this laser generated double lines simultaneously, one of them being blocked by the filter. Consequently, the reported reflectivity [Proc. Soc. Photo-Opt. Instrum. Eng. 415, 28 (1983)] was off by ~25%. This problem was remedied by employing a more stable water-cooled device (from the same manufacturer), which obtained the current results.

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