GS12000 Series FT-IR Polarizers

FTIR Wire Grid Polarizers


Polarizers for FTIR spectroscopy

Specac manufacture a range of infrared wire grid polarizers for FTIR spectroscopic analysis.

Polarizer applications

  • the study of orientation effects of single crystals, polymers, and other molecules 
  • measuring thin films on reflective surfaces
  • obtaining optimum sensitivity for reflectance measurements

Polarizer substrates

  • calcium fluoride (CaF2)
  • barium fluoride (BaF2)
  • zinc selenide (ZnSe)
  • thalium bromoiodide (KRS-5)
  • germanium (Ge)

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.

Usable in conjunction with spectrometer accessories

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.

FTIR Polarizer reviews:

  • "Great product and affordable price" – Andrei Sirenko of Department of Physics, New Jersey Institute of Technology

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  • Ordering
  • Documents
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
Application Notes
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