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Evaluation of Diamond-Like Carbon as a Protective Coating for Holographic Filters
Published online by Cambridge University Press: 21 February 2011
Abstract
Diamond-like carbon (DLC), a hard, optically transparent, and chemically inert material, is becoming increasingly important for many applications. With the development of low-temperature deposition techniques, DLC can now be applied to many heat-sensitive polymers. This paper will discuss the application of a DLC coating as an abrasion and moisture barrier for three different laser-protective holographic filters. The objective of this investigation is to study the influence of the coating process on the holographic filters, and to determine the effectiveness of the DLC coating as the environmental seal for these filters. The DLC coated filters were characterized by UV/visible spectroscopy, scanning electron microscopy, before and after exposure in an environmental chamber set at 71°C, and 90% humidity. The structure and hardness of the DLC coating were evaluated respectively by Raman spectroscopy and nanoindentation method.
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- Copyright © Materials Research Society 1995