Optical thin films
J S Seeley
Pergamon Press, Encyclopaedia of Materials Science and Engineering, Pages 3322-3323 (1986)
Optical thin films are coatings of amorphous, crystalline or polymerized materials, in single or multiple layers, on surfaces of optical components such as lenses and mirrors. These thin film coatings are used in optics to reduce reflections from optical parts (antireflection coatings) or to provide highly reflective surfaces (dielectric mirrors), as well as to protect components against abrasion and ambient moisture.