The Glan Thompson polarizer consists of two calcite prisms or α-bbo prisms. There are two types of Gran Thompson. One is the standard form, the other is the long form. The ratio of length to aperture is 2.5:1 and 3.0:1, respectively. Gran Thompson has higher extinction ratio than air spaced polarizer. In the ultraviolet spectrum, their transmission is limited by the absorption of birefringent material and cement layer. α-bbo polarizer and calcite polarizer can be used in the range of 220-900 nm and 350-2300 nm, respectively. The polarizer has the largest field angle in any design. The standard form of the polarizer is 2.5:1 long aperture ratio, and the complete acceptance angle is greater than 15 degrees.


Basic Parameters

Product IDPA01003
Wavelength Range400-2300nm
Extinction Ratio<5×10-5
Surface Quality20/10
Wavefront Distortion<λ/4@632.8nm
Beam Deviation<3 arcmin
Damage Threshold5W/cm2 CW,1064nm
CoatingSingle Layer MgF2@1064nm, Tp>90%@1064nm Typical
MountBlack Anodized Aluminium


  • Low Power Application
  • High Polarization Purity
  • Large Acceptance Angle
  • RoHS Compliant


Glan Thompson Polarizer Spectrogram1
Glan Thompson Polarizer Spectrogram2
Glan Thompson Polarizer Spectrogram3
Glan Thompson Polarizer Spectrogram4

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