Glan Thompson Polarizer
Quantity : 999
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.
Angular Field vs Wavelength
Specifications
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Material
|
a -BBO or Calcite
|
|
Wavelength Range
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a -BBO: 200-3500 nm, Calcite: 350-2300 nm
|
|
Extinction Ratio
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a -BBO: <5x10 -6 , Calcite: <5x10-5 </div>
|
|
Parallelism
|
<1 arc Min</div>
|
|
Surface Quality
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20/10
|
|
Beam Deviation
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< 3 arc minutes
|
|
Wavefornt Distortion
|
l/4@633nm
|
|
Damage Threshold
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>500 MW/cm2
|
|
Coating
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Single Layer MgF2
|
|
Mount
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Black Anodized Aluminium
|
|
Part NO.
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L/CA
|
ExtinctionRatio
|
Angular Field
|
C.A.φa
(mm)
|
O.D.φd
(mm)
|
L(mm)
|
|
PGM2106
|
2.5
|
<5×10-5</div>
|
>14~16°
|
6.0
|
15.0
|
22.0
|
|
PGM2108
|
8.0
|
25.4
|
28.0
|
|||
|
PGM2110
|
10.0
|
25.4
|
33.0
|
|||
|
PGM2112
|
12.7
|
25.4
|
39.0
|
|||
|
PGM2115
|
15.0
|
30.0
|
45.5
|
|||
|
PGM2206
|
3.0
|
<5×10-5</div>
|
>25~28°
|
6.0
|
15.0
|
26.0
|
|
PGM2208
|
8.0
|
25.4
|
32.0
|
|||
|
PGM2210
|
10.0
|
25.4
|
38.0
|
|||
|
PGM2212
|
12.7
|
25.4
|
46.0
|
|||
|
PGM2215
|
15.0
|
30.0
|
53.0
|
|
Part NO.
|
L/CA
|
Extinction Ratio
|
Angular Field
|
C.A. φa
(mm)
|
O.D.φd
(mm)
|
L(mm)
|
|
PGM1006
|
1.6
|
<5×10-6</div>
|
>15°
|
6.0
|
15.0
|
22.0
|
|
PGM1008
|
8.0
|
25.4
|
28.0
|
|||
|
PGM1010
|
10.0
|
25.4
|
33.0
|
|||
|
PGM1012
|
12.7
|
25.4
|
39.0
|
|||
|
PGM1015
|
15.0
|
30.0
|
45.5
|
Contact : amiee ye,
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