Absorbing Coatings For The Far Infrared

J. R Grammer; L J. Bailin; M D Blue; S Perkowitz

doi:10.1117/12.959616

3 March 1981 Absorbing Coatings For The Far Infrared

J. R Grammer, L J. Bailin, M D Blue, S Perkowitz

Proceedings Volume 0257, Radiation Scattering in Optical Systems; (1981) https://doi.org/10.1117/12.959616
Event: 1980 Huntsville Technical Symposium, 1980, Huntsville, United States

Abstract

Far-infrared optical sensors operating in the submillimeter wavelength region require baffle systems to suppress stray light. Because a high degree of rejection of the stray light is required, the baffle systems must use highly absorbent coatings. Most common optical baffle coatings are not functional at wavelengths greater than 100 μm. However, multilayer coatings have been developed that minimize front surface reflectance and maximize absorptance with a minimum required coating thickness. Data for a polyurethane binder and carbon-pigmented coating show that a multilayer coating with a thickness of approximately 5 mils has a reflectance of less than 10 percent over the wavelengths out to 300 μm.

Citation Download Citation

J. R Grammer, L J. Bailin, M D Blue, and S Perkowitz "Absorbing Coatings For The Far Infrared", Proc. SPIE 0257, Radiation Scattering in Optical Systems, (3 March 1981); https://doi.org/10.1117/12.959616

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