Broadband Mid-IR Polarizers

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Broadband Mid-IR Polarizers

Holographic and ruled wire grid polarizers are perfect for use in Mid-IR range starting from 2 μm up to 35 μm.

Coatings BBAR on each surface
Dimension Tolerances, mm +0/-0.5 mm
Laser Damage Threshold, J/cm² > 50 W/cm2 CW or >0.7 J/cm2 100 ns pulsed for holographic type polarizers
> 120 W/cm2 CW or > 2 J/cm2 100 ns pulsed for mechanically ruled polarizers
Parallelism, arcsec <5 arcmin
Surface Flatness <1.5λ@632.8 nm
Surface Quality, S-D 80/50
Description

Details

A fine array of parallel conducting wires whose period is smaller compared to the wavelength of incident radiation will transmit one polarisation and reflect the other. The component of the radiation whose electric vector is perpendicular to the direction of the wires and induces current in the wires will be transmitted and the parallel vector reflected. Laserand's Mid-IR polarizers are produced utilizing holographic method (i.e. laser interferometry) or mechanically ruled. These polarisers do not suffer from beam displacement, are not affected by diverging or converging beam, have wide acceptance angle without degradation of performance and portable.

Features
  • Extremely broadband
  • Wide acceptance angle
  • Compact and portable
  • Polyethylene polarizers for 20-1000 microns are also available!
  • Long life time
Applications

Performance table

Material 
Spectral range (um) 

Transmission efficiency, %
(k1) ; (k2)

  Degree of polarisation, % (k1-k2) / (k1+k2) 
Extinction ratio (k1/2k2) 
Contrast ratio (k1/k2)Type
KRS-5 2-35 microns (k1>75%; k271%; k2<0,3%)@15um   98.2%@3um ; 99.2%@15um 54:1@3um ; 118:1@15um   108:1@3um ; 236:1@15um   Holographic
CaF2 1-10 microns (k1>85%; k280%; k2<0,24%)@8um   98.4%@3um ; 99.4%@8um 61:1@3um ; 165:1@8um   122:1@3um ; 330:1@8um   Holographic
BaF2 1-13 microns (k1>85%; k285%; k2<0,23%)@10um   98.6%@3um ; 99.5%@10um 73:1@3um ; 185:1@10um   146:1@3um ; 370:1@10um   Holographic
ZnSe 1-16 microns (k1>70%; k272%; k2<0,22%)@10um   98.3%@3um ; 99.4%@10um 58:1@3um ; 163:1@10um   116:1@3um ; 326:1@10um   Holographic
CaF2 1-9 microns (k1>70%; k2<0.7%)@3um   >98%@3um >50:1@3um   >100:1@3um   Mechanically ruled
ZnSe 1,5-14 microns (k1>70%; k2<1.4%)@3um   >97%@3um >25:1@3um   >50:1@3um   Mechanically ruled

 

Name Clear Aperture, mmExtinction RatioMaterialMount Diameter, mmType Price Quantity

2-BBMP-H1-18

18150:1 @ 3 um; 300:1 @ 15 umKRS-525Holographic
US$2,390.00

2-BBMP-H1-25

25150:1 @ 3 um; 300:1 @ 15 umKRS-541Holographic
US$2,590.00

2-BBMP-H2-18

18150:1 @ 3 um; 300:1 @ 8 umCaF225Holographic
US$1,430.00

2-BBMP-H2-25

25150:1 @ 3 um; 300:1 @ 8 umCaF241Holographic
US$1,790.00

2-BBMP-H3-18

18150:1 @ 3 um; 300:1 @ 10 umBaF225Holographic
US$1,730.00

2-BBMP-H3-25

25150:1 @ 3 um; 300:1 @ 10 umBaF241Holographic
US$1,990.00

2-BBMP-H4-18

18150:1 @ 3 um; 300:1 @ 10 umZnSe25Holographic
US$1,720.00

2-BBMP-H4-25

25150:1 @ 3 um; 300:1 @ 10 umZnSe41Holographic
US$2,020.00

2-BBMP-R1-18

1850:1 @ 3 um; 80:1 @ 5 umCaF225Ruled
US$2,290.00

2-BBMP-R1-25

2550:1 @ 3 um; 80:1 @ 5 umCaF241Ruled
US$3,030.00

2-BBMP-R2-18

1850:1 @ 3 um; 75:1 @ 5 um; 100:1 @ 10.6 umZnSe25Ruled
US$2,500.00

2-BBMP-R2-25

2550:1 @ 3 um; 75:1 @ 5 um; 100:1 @ 10.6 umZnSe41Ruled
US$4,240.00
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