Optical coatings are usually multilayer film structures used to obtain desired transmission, reflection, and absorption from surfaces. The characteristics may be due to the intrinsic property of the material (e.g., metal reflectors) or due to interference effects. Today, optical thin films are involved in numerous optical systems, where they are key to ultimate system performance. For most applications, high accuracy is required for both the optical and nonoptical properties, including low-loss energy balance, mechanical and thermal behavior, damage threshold, and nonlinear properties. Great progress has been made in almost all aspects. However, there are still problems and barriers to progress that need to be overcome. Identification and possible solutions to these problems represent an important aspect of research and development.
Online access to SPIE eBooks is limited to subscribing institutions.