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Wollaston Polarizers

Wollaston Polarizers


Wollaston polarizers consist of two identically shaped prisms made from a birefringent crystal. The crystal axes of the two prisms have orthogonal orientation. This results in a deviation of the beams having ordinary and the extraordinary, respectively by approximately the same angle but with opposite sign. In Wollaston polarizers both output beams show a high extinction ratio over the entire transmission range. The directions of polarization are parallel and orthogonal to the splitting plate, respectively.

We provide the Wollaston prisms by default in a cylindrical holder and without antireflection coating.

Wollaston prisms are available from calcite as well as from quartz. For both crystals we use material free of striae and bubbles. Calcite allows to achieve larger splitting angles between the two output beams (standard angles: 5°, 10° and 20°) . For quartz the splitting angles are smaller owing to the lower birefringence (standard angles: 0,5° and 1°). The advantages of quartz are the better transmission in the deep UV as well as the availability of larger dimensions.

The given splitting angles always refer to the full angle between the beams at the output.

Optical specifications

material calcite quartz
spectral range 350-2200 nm 230-2800 nm
extinction ratio 10-6 10-5
wavefront distortion <λ/2 <λ/5
angular separation 5° / 10° / 20° 0,5° / 1,0°
connection of the prisms cemented optical contact (no cement)

Splitting angle 5°

Optical specifications

format
10 mm 15 mm 20 mm 25 mm
Article-No.:
PWK 5.10 PWK 5.15 PWK 5.20 PWK 5.25
free aperture [mm] 9,5 14,5 19,5 24,5
Length [mm] 4,5 6,0 7,0 8,5
cut angle [°] 14° 14° 14° 14°
mount diameter [mm] 25 25 30 40
mount length [mm] 10 11 12 15

Prices

order no. 1 piece in € 2-5 piece in € 6-10 piece in €
PWK 5.10 966.- 881.- 785.-
PWK 5.15 1408.- 1290.- 1155.-
order no. 1 piece in € 2 piece in € 3-5 piece in €
PWK 5.20 1863.- 1696.- 1562.-
PWK 5.25 3016.- 2650.- 2358.-

Splitting angle 10°

Optical specifications

format
10 mm 15 mm 20 mm 25 mm
Article-No.:
PWK 10.10 PWK 10.15 PWK 10.20 PWK 10.25
free aperture [mm] 9,5 14,5 19,5 24,5
Length [mm] 7,0 9,5  12,0 14,5
cut angle [°] 26,5° 26,5° 26,5° 26,5°
mount diameter [mm] 25 25 30 40
mount length  [mm] 15 15 18 21

Prices

order no. 1 piece in € 2-5 piece in € 6-10 piece in €
PWK 10.10 1000.- 912.- 812.-
PWK 10.15 1489.- 1365.- 1222.-
order no. 1 piece in € 2 piece in € 3-5 piece in €
PWK 10.20 2057.- 1872.- 1725.-
PWK 10.25 3394.- 2983.- 2653.-

Splitting angle 20°

Optical specifications

format
10 mm 15 mm 20 mm 25 mm
Article-No.:
PWK 20.10 PWK 20.15 PWK 20.20 PWK 20.25
free aperture [mm] 9,5 14,5 19,5 24,5
Length [mm] 12,0 17,0 22,0 27,5
cut angle [°] 45,0° 45,0° 45,0° 45,0°
mount diameter [mm] 25 25 30 40
mount length [mm] 18 22 28 35

Prices

order no. 1 piece in € 2-5 piece in € 6-10 piece in €
PWK 20.10 1068.- 974.- 867.-
PWK 20.15 1663.- 1524.- 1364.-
order no. 1 piece in € 2 piece in € 3-5 piece in €
PWK 20.20 2445.- 2226.- 2050.-
PWK 20.25 4213.- 3703.- 3294.-

Splitting angle 0,5°

Optical specifications

format
10 mm 15 mm 20 mm 25 mm 30 mm
Article-No::
PWQ 30.10 PWQ 30.15 PWQ 30.20 PWQ 30.25 PWQ 30.30
free aperture [mm] 9,5 14,5 19,5 24,5 29,5
Length [mm] 8,0 10,0  13,5 16,0 18,5
cut angle [°] 25,5°  25,5° 25,5° 25,5° 25,5°
mount diameter [mm] 25 25 30 40 50
mount length  [mm] 15 15 18 21 25

Prices

order no. 1 piece in € 2-5 piece in € 6-10 piece in €
PWQ 30.10 813.- 753.- 686.-
PWQ 30.15 1059.- 978.- 885.-
PWQ 30.20 1359.- 1249.- 1125.-
order no. 1 piece in € 2 piece in € 3-5 piece in €
PWQ 30.25 2068.- 1904.- 1773.-
PWQ 30.30 2329.- 2144.- 1996.-

Splitting angle 1°

Optical specifications

format
10 mm 15 mm 20 mm 25 mm 30 mm
Article-No.:
PWQ 60.10 PWQ 60.15 PWQ 60.20 PWQ 60.25 PWQ 60.30
free aperture [mm] 9,5 14,5 19,5 24,5 29,5
Length [mm] 12,5 17,5  23 27,5 32
cut angle [°] 43,5°  43,5° 43,5° 43,5° 43,5°
mount diameter [mm] 25 25 30 40 50
mount length  [mm] 18 22 28 35 38

Prices

order no. 1 piece in € 2-5 piece in € 6-10 piece in €
PWQ 60.10 887.- 826.- 757.-
PWQ 60.15 1131.- 1059.- 977.-
PWQ 60.20 1502.- 1402.- 1287.-
order no. 1 piece in € 2 piece in € 3-5 piece in €
PWQ 60.25 2272.- 2137.- 2028.-
PWQ 60.30 2665.- 2506.- 2379.-

Price custom version

custom splitting angle on request
antireflection coating on request
unmount prisms on request
polarisation under ±45°
by cutting the prisms with an angle ±45° betweenthe crystal axes
and the wedge direction one achieves an acording rotation of the output polarization
on request
connection with Thorlabs SM1 or SM2 thread on request