What are some of the over coatings offered for reflection gratings?

  • AlmgF2 – protects aluminum from oxidation, maintaining original high reflectance of aluminum in VIS & UV
  • AU-3 – Increases reflectivity but may reduce damage threshold by a factor of 2 or more
  • AR (Anti-Reflective) – Cuts down on reflectance
  • AlmgF3 – Overcoat for improved UV reflectance
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