FAR Infrared mirrors
Gold coating offers a broad and consistent reflectivity in the infrared spectrum from 800nm to far beyond 200 microns wavelength. FLIR systems, and thermal imaging in the long wavelength infrared use metal mirrors.
Gold coated copper mirrors have found uses at 100um micron wavelengths e.g mirrors for far infrared lasers such as Methanol lasers.
Electroplated Gold mirror coating is ideal for broad spectrum IR applications such as infrared gas spectroscopy, or where multi-wavelength infrared sources are used.
Terahertz imaging, and Terahertz spectroscopy both use Gold coated mirrors for directing and collecting sub millimetre wavelength radiation.
Infra red sources such as Optical Parametric Oscillators, and Lead Salt laser diodes, are an area of research where gold coated mirrors can be used for multiple wavelength reflection.
The chemical inertness of Gold find uses in environmental monitoring of gases such as in chimneys, flues, pipes, and of liquids where other coating materials would be destroyed.
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