Thin film coating is a vacuum deposition procedure used to enhance the transmissive properties of an optical surface. The most common types of dielectric coatings are anti-reflection and high reflection coatings, but beam-splitter, band pass filter, edge filter, and polarizing coatings are also available. Because thin film coatings are more durable than optical glass, coatings also help protect an optic surface from scratches and the environment.
Optimax produces optics up to 300mm in diameter with a wide variety of narrow and broadband anti-reflection coatings including doublet interface coatings. Both metal and dielectric mirror coatings are also available. For custom coatings, we utilize TFCalc thin film design software. Please see the reverse side for sample reflectance curves.
Optimax performs test runs of all coatings before beginning production to ensure a good design. We use a Perkin-Elmer Lambda 900 Spectrophotometer to check the performance of the coating upon completion. Adhesion, abrasion, and humidity tests are available to verify coating durability in accordance with sections of MIL-C-675C, MIL-C-48497A, and MIL-C-13508C specifications. Laser damage testing is also available upon customer request.
