Optical Coating Systems Explained

A vacuum evaporation system helps simplify the manufacturing process, creating high quality materials cheaply. With sputtering, we can metalize a plastic object or add important properties to existing materials. Read on for an explanation of how optical coating works, and where you might find it used.

Optical Coating Types

Optics refer to lenses. These optics can be a part of glasses, lights or cameras. There are three types of coding aside from colored gels: glare resistant coating cuts down on the sunlight reflected from the surface of the lens. This is most useful for eye glasses. High reflection coatings are useful for objects like magic mirrors, which use a highly reflective surface with a transparent background to create a one-way effect. There is also the extreme UV coating, which makes it difficult to focus light and may dampen some of the heat that gets through the surface.


Sputter deposition is used to place a coating onto the substrate. Without sputtering, the lens could get damaged from the extreme heat necessary to melt the substrate. Even if the substrate were broken down and poured onto the substrate, the end result would not be microscopic.

Other Uses

We see optical coating frequently in home improvement situations. UV coating can dampen some of the sunlight a window receives, or it can be used to coat a cell on a solar panel with material that absorbs sunlight. We also use this coating to make sun glasses UV resistant, or to add glare resistance to a pair of eye glasses.

Denton Vacuum, LLC sells manufacturing equipment including vacuum coating systems, and ion beam assisted deposition.

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