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Glan-Thompson Polarizer

Glan-Thompson Polarizer

Glan-Thompson Polarizer

Glan-Thompson Polarizer

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Glan Thompson polarizer is made of two calcite prisms or α-BBO prisms cemented together. Two types of Glan Thompsons are available. One is the standard form and the other is the long form. Their length to aperture ratios is 2.5:1 and 3.0:1 respectively. Glan Thompsons tend to have higher extinction ratio than air spaced polarizers. In the ultra violet spectrum, their transmission is limited by absorption in birefriengent materials as well as the cement layer.

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Features:

●Cemented

●Suitable for low power applications

●Special design for the ratio of L/A (length/aperture) guarantees the wide acceptance angle

Specifications：

Material

Calcite；α-BBO

Wavelength Range

Calcite:   350-2300nm

α-BBO: 220-900nm

Extinction Ratio

Calcite:<5x10-5

α-BBO:<5x10-6

Surface Quality

60/40

Dimension   Tolerance

±0.1mm

Damage Threshold

＞200MW/cm2

Beam Deviation

＜3′

Wavefront   Distortion

＜λ/4 @ 632.8nm

Coating

Single Layer MgF2

Housing

Black Anodized   Aluminum

 


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