Polarization Optics


Calomel IR polarization components represent unique devices exhibiting an extremely high extinction ratio (ER). The current optical market of MIR/LWIR polarizers is covered only by wire-grid or holographic polarizers. These types provide only low ER and damage threshold values which limit the final performance of the products. The combination of Calomel´s two unique material properties: a high value of birefringence and a wide transparency range, makes it a great candidate for infrared polarizers.

Another significant advantage of Calomel is that it is optically positive, so Calomel polarizers transmit the ordinary beam, whereas the extraordinary one is reflected. This is an exceptional feature of mercurous chloride, as all the other polarization materials applicable in MWIR range only transmit the extraordinary ray.

We also provide manufacturing possibilities of other different types of polarization components depending on the customer´s needs. Please feel free to contact us for inquiry.

Polarization Optics
Prisms/cubes Waveplates/retarders Depolarizers (scramblers) IR polarizers
Main Features
  • Manufactured from high purity Mercurous Chloride (Calomel)
  • Transmitted and polarized ordinary o-ray for applications
  • Very high extinction ratio (ER) values compared to market competitors
  • 10x10mm or 15x15mm clear aperture
  • Applicable for high-power lasers
  • Mounted in 360° rotational protective housing
  • 20-10 Scratch-Dig surface quality of input and exit faces
  • Infrared spectroscopy of materials (polymers and crystallography)
  • Infrared microscopy (sample characterization)
  • MWIR thermal imaging systems
  • Thin films measurement
  • Analysis in infrared astronomy
  • Laser polarization and beam attenuation
  • Coupling devices for MWIR and LWIR lasers
  • Thermal imaging
Glan-Taylor polarizer
Calomel IR Polarizer Specs
Parameter Value
Extinction Ratio 0.632µm 1:3000 to 1:9000
2.5 – 16µm 1:15000 to 1:100000
Substrate Hg2Cl2 (Calomel monocrystal)
Design air-spaced
Transmission Range 0.38 – 17µm
Clear Optical Aperture 10mm x 10mm/15mm x 15mm
Field of View ±10°
AR coating in development
Surface quality 20-10 Scratch-Dig
Rochon polarizer
Calomel MWIR polarizers
Carina Nebula pillar taken by Hubble telescope
Calomel MWIR polarizers

Interested in Calomel polarization optics? Please contact us on info(at)calomel.cz for inquiry.