The magnesium fluoride
coating found to mitigate loss in the 1930s has now been replaced by multiple compounds that pass individual wavelengths much better.
Wilk, "Corrosion protection and repassivation after the deformation of magnesium alloys coated with a protective magnesium fluoride
layer," in Proceedings of the 2005 TMS Annual Meeting, pp.
The oldest and simplest optical coating is magnesium fluoride
. It creates the distinct purple color you see when you look across a lens surface at an angle.
A deuterium lamp provides the electromagnetic radiation to the flow cell, which is isolated from the source and detector modules by two VUV transparent magnesium fluoride
Superabrasives specialist Engis, has developed a new process for polishing Laser grade-quality optical surfaces, which enables materials including: Zinc Selenide, Zinc Sulfide, Germanium, Silicon, Calcium Fluoride and Magnesium Fluoride
, to be polished using exactly the same diamond slurry and composite plate combination.
The fishnet consists of 20 alternating layers of gold films 30 nanometers thick and magnesium fluoride
films 50 nanometers thick on a 50-nanometer thick silicon nitride membrane.
 Sanaz Sepehri and Haleh Kangarlou, Producing and Investigating Structural Properties of the Semiconductor Multi-Layer of Zinc Sulfide on Magnesium Fluoride
on Glass, Journal of Applied Science and Agriculture, 9 (1) (2014) 231-239.
Preston, "Magnesium fluoride
windowed deuterium lamps as radiance transfer standards between 115 and 370 nm," Journal of Physics E: Scientific Instruments, vol.
The family of larger aperture optics consists of two different birefringent crystals - crystalline quartz and magnesium fluoride
(MgF2) - each with a highly efficient broadband antireflection coating, in an air-spaced design.
Metier IR and Broadband Optics are fabricated to specification from calcium fluoride, magnesium fluoride
, germanium, silicon, zinc selenide and zinc sulfide.
Fluoride ions precipitate as insoluble magnesium fluoride
. Due to MgO the pH of treated water is 10 to 11.
In the ensuing decades, magnesium fluoride
has been joined by many other "rare earths" in very thin layers.