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GLAN THOMPSON POLARIZER

Glan Thompson polarizer is made of two calcite prisms or two 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 2.5:1 and 3.0:1 respectively.Glan Thompson polarizers 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 2300nm 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,while 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

  

a-BBO,220-900nm              Calcite:L/A=2.5(350-2300nm)

     

Calcite:L/A=3(350-2300nm)    

Specifications

Material

a-BBO,Calcite

 Wavelength Range

a-BBO:200-900nm,Calcite:350-2300nm

Extinction Ratio

a-BBO:<5*10-6,Calcite:<5*10-5

Surface Quality

20/10Scratch/Dig

Beam Deviation

<3 arc minutes

Wavefront Distortion

<?/4@633nm

Damage Threshold

>200MW/cm2

Coating

Single MgF2

Mount

Black Anodized Aluminum

      

GLAN THOMPSON POLARIZERS

Standard Products

a-BBO Glan Thompson Polarizer Special for DUV,Visible and NIR(200-900nm)

Part No.

L(Material)/CA

Extinction Ration

Angular Field(°)

C.A.fa(mm)

O.D.fd(mm)

L+/-0.1(mm)

Unit Price

PGM6006

1.6

<5*10-6

>15

6.0

15.0

18.0

$398

PGM6008

1.6

<5*10-6

>15

8.0

25.4

21.0

$438

PGM6010

1.6

<5*10-6

>15

10.0

25.4

24.5

$538

PGM6012

1.6

<5*10-6

>15

12.7

25.4

29.0

$648

PGM6015

1.6

<5*10-6

>15

15.0

30.0

33.0

$808

PGM6020

1.6

<5*10-6

>15

20.0

38.0

41.5

$1108

Calcite Glan Thompson Polarizer (350-2300nm)

Part No.

L(Material)/CA

Extinction Ratio

Angular Field(°)

C.A.fa(mm)

O.D.fd(mm)

L+/-0.1(mm)

Unit Price

PGM7106

2.5

<5*10-5

14-16

6.0

15.0

23.0

$238

PGM7108

2.5

<5*10-5

14-16

8.0

25.4

28.0

$268

PGM7110

2.5

<5*10-5

14-16

10.0

25.4

33.0

$318

PGM7112

2.5

<5*10-5

14-16

12.7

25.4

39.0

$368

PGM7115

2.5

<5*10-5

14-16

15.0

30.0

45.5

$498

PGM7206

3

<5*10-5

25-28

6.0

15.0

26.0

$308

PGM7208

3

<5*10-5

25-28

8.0

25.4

32.0

$338

PGM7210

3

<5*10-5

25-28

10.0

25.4

38.0

$458

PGM7212

3

<5*10-5

25-28

12.7

25.4

46.0

$528

PGM7215

3

<5*10-5

25-28

15.0

30.0

53.0

$628