Common black coatings – reflectance and ageing characteristics in the 0.32–14.3μm wavelength range

The diffuse and regular reflectances of five optically absorbing coatings frequently used in optical systems, were measured over the 0.32–14.3μm wavelength range, before and after exposure to heat and intense optical radiation. The measured coatings included Nextel Velvet Black, an anodised coating...

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Bibliographic Details
Published in:Optics communications 2007-02, Vol.270 (2), p.262-272
Main Authors: Dury, Martin R., Theocharous, Theo, Harrison, Neil, Fox, Nigel, Hilton, Moira
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Optical coatings
Optical elements, devices, and systems
Optics
Physics
Radiation effects on optical elements, devices, and systems
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Summary:The diffuse and regular reflectances of five optically absorbing coatings frequently used in optical systems, were measured over the 0.32–14.3μm wavelength range, before and after exposure to heat and intense optical radiation. The measured coatings included Nextel Velvet Black, an anodised coating and NPL Super Black. The anodised coating exhibited substantial variations in its diffuse and regular reflectance values after thermal and simulated solar ageing. Solar and thermal ageing of the Nextel Velvet Black resulted in increases of its reflectance. However, thermal ageing tended to decrease the reflectance of the other paint samples examined. Thermal and solar ageing of the NPL Super Black resulted in only minor changes in its reflectance characteristics. All measurements are traceable to the UK National Standards.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2006.08.038