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Infrared Polarizers

infrared polarizers

Polarizers are useful for enhancing sensitivity in grazing angle measurements using specular reflectance accessories and for molecular orientation studies. Polarizers attenuate radiation from polarized lasers, polarize radiation from unpolarized lasers and can be used in pairs to both polarize and attenuate. ICL wire grid polarizers are available for wavelength ranges from 3µm to 15µm.
These wire grid polarizers are created by etching sub-micron spaced grooves (2400 grooves per mm) using holographic methods. Each polarizer is mounted in a protective 5mm thick anodized aluminum ring that protects both faces of the polarizer. The outside diameter (OD) of the 25mm polarizer is 25mm with a clear aperture of 18mm. The OD of the 50mm polarizer is 50mm with a clear aperture of 34mm.

ICL's 25mm wire grid IR Polarizers are available with 360° rotation stage holders that are mounted on 2" x 3" backplates. These rotating mounts render the polarizer suitable for use in any FTIR or IR spectrophotometer simply by sliding the mount containing the polarizer into the instrument's standard 2" x 3" slide mount fixture. The polarizer, which is itself permanently mounted in a black anodized aluminum ring, is easily inserted into and removed from the rotating holder without touching the face of the polarizer. When ordered with a mount, polarizers can be installed in the mount prior to shipping on customer's request.

 

Material

CaF2

BaF2

ZnSe

KRS-5

Wavelength

3µm

8µm

3µm

10µm

3µm

10µm

3µm

15µm

Typical Extinction Ratio

100:1

250:1

100:1

300:1

100:1

300:1

100:1

200:1

Wire Grid Spacing

2400 Grooves/mm

2400 Grooves/mm

2400 Grooves/mm

2400 Grooves/mm

Parallelism

<= 3 arcmin

<= 3 arcmin

<= 3 arcmin

<= 3 arcmin

Substrate Thickness

2mm nominal

2mm nominal

2mm nominal

2mm nominal

Ring Thickness

5.0mm +/- 0.1mm

5.0mm +/- 0.1mm

5.0mm +/- 0.1mm

5.0mm +/- 0.1mm

Dimensonal Tolerance

+/- 0.5mm

+/- 0.5mm

+/- 0.5mm

+/- 0.5mm

Damage Threshold

10W/cm² CW

10KW/cm² Pulsed

10W/cm² CW

10KW/cm² Pulsed

10W/cm² CW

10KW/cm² Pulsed

10W/cm² CW

10KW/cm² Pulsed

 

Part No.

Description

Price

0009-5165

25mm KRS-5

Wire Grid Polarizer

$2591.00

0009-8429

50mm KRS-5

Wire Grid Polarizer

$3299.00

0009-5169

25mm CaF2

Wire Grid Polarizer

$2267.00

0009-8432

50mm CaF2

Wire Grid Polarizer

$2499.00

0009-5170

25mm BaF2

Wire Grid Polarizer

$2591.00

0009-8430

50mm BaF2

Wire Grid Polarizer

$2999.00

0009-5171

25mm ZnSe

Wire Grid Polarizer

$2591.00

0009-8431

50mm ZnSe

Wire Grid Polarizer

$3199.00

0009-5172

360° Rotation stage with 2" x 3" backplate for mounting 25mm IR polarizer in any IR or FTIR spectrophotometer

$340.00