click me!

Glan Thompson Polarizers of Calcite D12.7mm 350-2300nm with Round Mount 25°

Code: 20703-011



Material Calcite Wavelength Range 350~2300nm
Aperture Size ɸ12.7mm Extinction Ratio <5x10-5
Acceptance Angle >25° Surface Quality 20 / 10 S/D
Parallelism <1 arc Min Beam Deviation < 3 arc minutes
Wavefront Distortion λ /4@633nm Damage Threshold >100 MW/cm2@1064nm, 20ns, 20Hz
Coating Single MgF2 Mount Black Anodized Aluminium
Mount Size ɸ25.4x46mm

Glan-Thompson polarizers consist of two cemented prisms made from the highest optical grade of calcite or a-BBO crystal. Unpolarized light enters the polarizer and is split at the interface between the two crystals. The ordinary rays are reflected at each interface, causing them to be scattered and partially absorbed by the polarizer housing. The extraordinary rays pass straight through the polarizer, providing a polarized output.

Angular Field vs Wavelength (Calcite 350-2300nm)

4 weeks
Optical Calcite Crystals

Optical Calcite Crystals

  • Broad transparent spectral range 0.2μm to 2.5μm
  • High birefringence
  • Soft and easy to be scratched
  • Applications: Polarizers, Beam divergent element, Laser gate.