Holographic Wire Grid Polarizers with Size (mm) 25 mm dia. and Substrate ZnSe and Thickness 3.0 mm

Holographic Wire Grid Polarizers

Optometrics manufactures holographic wire grid polarizers on CaF2 (Calcium Fluoride), ZnSe (Zinc Selenide), BaF2 (Barium Fluoride), KRS-5 and Ge (Germanium), covering a wavelength region from 2.5 to 30 microns.

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  • Wavelength region: 2.5 to 30 microns
  • CaF2, ZnSe, BaF2, Ge and KRS-5 (Thallium Bromide) substrates
  • Finer grid pattern for better low wavelength performance
  • High transmission
  • Extinction ratio > 90,000:1

  • Zinc Selenide’s transmission can be enhanced over a selected wavelength range, typically 9 to 11 microns, by an AR coating on the rear surface
  • Calcium Fluoride and Barium Fluoride have low refractive index values and do not see significant benefit from AR coatings
  • KRS-5 is not normally AR coated, because this would limit its broad transmission range, which is its primary advantage
  • Germanium polarizers are AR/AR coated to maximize transmission @10.6μ
  • Due to the manufacturing process ruled wire grid polarizers are not offered with AR coatings
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