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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.

Description

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.

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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)

Optical specifications

Splitting angle 5°

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°
mount diameter	[mm]	25	25	30	40
mount length	[mm]	10	11	12	15

Splitting angle 10°

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°
mount diameter	[mm]	25	25	30	40
mount length	[mm]	15	15	20	21

Splitting angle 20°

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°
mount diameter	[mm]	25	25	30	40
mount length	[mm]	18	22	28	35

Prices

For up-to-date prices, please refer to the current price list or request a quote.

Optical specifications

Splitting angle 0,5°

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°
mount diameter	[mm]	25	25	30	40	50
mount length	[mm]	15	15	20	21	25

Splitting angle 1°

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°
mount diameter	[mm]	25	25	30	40	50
mount length	[mm]	18	22	28	35	38

Prices

For up-to-date prices, please refer to the current price list or request a quote.

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

Wollaston Polarizers

Description

B. Halle Nachfl. GmbH

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