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For high power optics, (particularly ZnSe lenses), an increase in absorption of just 1 part per thousand can be the difference between success and failure.

There are many sources and types of contamination that can absorb the beam, leading to increased heating, optical distortion, and ultimately catastrophic failure of the optic.

To see a technical article on the nature of contamination and how it can affect an optic download this pdf file.Contamination.pdf

Cleaning optics is a scientific task, done correctly the working life of optics can be extended greatly. Download this technical article to see how. Clean.pdf

Heating of optics from absorption will lead to optical distortion. To find out how much and what affect this has in real applications download this technical article.Thermal behaviour.pdf

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Laser Beam Products offer Laser Mirrors & Optics ZnSe laser lenses, ZnSe laser optics, CO2 laser mirrors, Infra Red optics, Copper mirrors, Aluminium mirrors, silicon mirrors, Molybdenum mirrors, beam expanders, phase retarding mirrors, Potassium Chloride (KCl) windows, gold coated mirrors, beam delivery optics, gold coated copper mirrors, reflectors for industrial cutting and welding.