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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 25 — Dec. 12, 2005
  • pp: 10382–10391

Emittance of a radar absorber coated with an infrared layer in the 3~5μm window

Lingyun Liu, Rongzhou Gong, Yongshan Cheng, Fengguo Zhang, Huahui He, and Dexiu Huang  »View Author Affiliations

Optics Express, Vol. 13, Issue 25, pp. 10382-10391 (2005)

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By use of the Kubelka-Munk theory, the Mie theory and the independent scattering approximation, we obtain the explicit expression of the emittance of an infrared coating attached to a radar absorber with a high emittance, in the 3~5μm window. Taking aluminum particles with spherical shape as the pigments within the coating, we give the dependence of the coating emittance with respect to the particle radius, the thickness of the coating. At a volume fraction of 0.05, we propose the optimum particle radius range of the pigment particles is around 0.35~0.6μm. When the thickness of the coating exceeds 300μm, the decrease of emittance at 4μm wavelength becomes negligible. Too much thickness of IR layer wouldn’t contribute to the decrease of emittance. We study the influence of the infrared coating on the performance of the radar absorber, and believe that not too much thick infrared coating consisting of spherical Al particles wouldn’t result in a remarkable deterioration of the absorbing ability of the radar absorber.

© 2005 Optical Society of America

OCIS Codes
(290.5850) Scattering : Scattering, particles
(290.7050) Scattering : Turbid media
(310.1620) Thin films : Interference coatings

ToC Category:
Research Papers

Lingyun Liu, Rongzhou Gong, Yongshan Cheng, Fengguo Zhang, Huahui He, and Dexiu Huang, "Emittance of a radar absorber coated with an infrared layer in the 3~5µm window," Opt. Express 13, 10382-10391 (2005)

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