Controls: Thin films deposited onto optical surfaces used to increase transmission of the surface. AR coatings are matched to requirements of each optic, ranging from the most common and cost effective single-layer MgF2 to custom, multi-band designs specific to a single application
Related Terms: Witness sample (used to test performance), coating durability, adhesion, MIL-C-675C, MIL-F-48616, MIL-C-48497A, MIL-M-13508C
Specifications Must Contain: Wavelength band in linear units, Percent Reflectance or Transmission, Angle of Incidence (if other than normal incidence), and minimum coating aperture (if different than Clear Aperture).
Specifications May Include: Laser Damage Threshold in J/cm2 (include Pulse-width, wavelength, repetition rate, spot size), multiple wavelength bands, combinations of R and T specs, polarization requirements.
Optimax Preferred Specification: Average Reflectance, normal incidence
Reasons: Metrology is the most straightforward
Manufacturing Standards: MIL-C-675C, MIL-F-48616, MIL-C-48497C, MIL-M-13508C, MIL-C-14806A, ISO, OEOSC OPI.0110-9, OPI.9211-2, OPI.9211-2, OPI.9211-1
For More Information
Optimax’s Technical Note on Thin Film Coating