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格兰汤姆逊偏振器

Glan Thompson polarizer is made of two calcite prisms or a -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 are 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. a -BBO polarizers and Calcite polarizers can be used from about 220 to 900nm and 350 to 2300 nm respectively.
The polarizers have the widest field angle of any design. The standard form of this polarizer with 2.5:1 length to aperture ratio has a full acceptance cone angle of more than 15 ° @ 589nm, symmetric about the input axis, whilst the long form with 3:1 ratio has a field angle >26 ° . The polarized field F1 and F2 of all these is shown in the plot below.

Specifications:
Material: α-BBO,Calcite
Wavelength Range: α-BBO:220-900nm,Calcite:350-2300nm
Extinction Ratio: α-BBO:<5x10-6;Calcite:<5x10-5
Parallelism: <1 arc Min.
Surface Quality: 20-10
Beam Deviation: <3 arc minutes
Wavefornt Distortion: λ/3@633nm
Damage Threshold: >200MW/cm2
Coating: Single layer MgF2
Mount: Black Anodized Aluminium

P/NMaterialL/CAExtinction RatioAngular Field(o)C.A.O.D.L
71301α-BBO1.6<5x10-6>1561514
71302α-BBO1.6<5x10-6>15825.417
71303α-BBO1.6<5x10-6>151025.421
71304α-BBO1.6<5x10-6>1512.725.426
71305α-BBO1.6<5x10-6>15153031
71306α-BBO1.6<5x10-6>15203840
71307Calcite2.5<5x10-614-1661518
71308Calcite2.5<5x10-614-16825.423
71309Calcite2.5<5x10-614-161025.428
71310Calcite2.5<5x10-614-1612.725.435
71311Calcite2.5<5x10-614-16153041
71312Calcite3<5x10-625-2861521
71313Calcite3<5x10-625-28825.427
71314Calcite3<5x10-625-281025.433
71315Calcite3<5x10-625-2812.725.441
71316Calcite3<5x10-625-28153048
●尺寸单位:毫米
●其他规格和镀膜要求请联系EastOptics销售获得。