GS12000 Series FT-IR Polarizers

FTIR Wire Grid Polarizers

Specac manufacture a range of infrared wire grid polarizers for FT-IR spectroscopic analysis. Applications include: the study of orientation effects of single crystals, polymers, and other molecules, measuring thin films on reflective surfaces, and obtaining optimum sensitivity for reflectance measurements.

These polarizers are available on a choice of calcium fluoride (CaF2), barium fluoride (BaF2), zinc selenide (ZnSe), thalium bromoiodiode (KRS-5), or germanium (Ge) substrates. With a grid periodicity of 4000 lines/mm, they offer high extinction coefficients and excellent throughput over the range 5000 cm-1 to 285 cm-1. The thin profile of this polarizer makes it suitable for FT-IR applications in which there are space constraints.

These polarizers are designed to fit directly into the aperture ports of all Specac Benchmark™ baseplate compatible accessories, such as the Golden Gate™ ATR, Silver Gate™ Evolution ATR, Gateway™ horizontal ATR systems, and the Cyclone™ and Tornado™ long pathlength gas cells. Alternatively, these polarizers are compatible with Specac’s 3” by 2” Slide Mount Polarizer Mount.

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  • Ordering
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FTIR Polarizers
  • FTIR Polarizer – BaF2 A BaF2 FTIR Infrared Polarizer (25mm C.A.). GS12900
  • FTIR Polarizer – CaF2 A CaF2 FTIR Infrared Polarizer (25mm C.A.). GS12800
  • FTIR Polarizer – Ge A Germanium FTIR Infrared Polarizer (25mm C.A.). GS12700
  • FTIR Polarizer – KRS-5 A KRS-5 FTIR Infrared Polariser (25mm C.A.). GS12000
  • FTIR Polarizer – ZnSe A ZnSe FTIR Infrared Polarizer (25mm C.A.). GS12950
Data Sheets
User Manuals


  • Wavelength range: 5000 cm-1 to 285 cm-1
  • CaF2, BaF2, ZnSe, KRS-5, and Ge substrates
  • High extinction ratio
  • High transmission
  • 25 mm clear aperture
  • FT-IR compatible mounting features
  • Wide acceptance angle for non-collimated beam