Polyethylene polarizers for 20-1000 microns are also available!
Long life time
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. Mid-IR polarizers are produced by 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.
+/- 0.5 mm
Wire grid spacing:
2700 grooves/mm (nominal) for holographic type polarizers 1200 grooves/mm (nominal) for mechanically ruled polarizers
<λ/20 @ 10.6 µm (up to 25 mm CA) <λ/10 @ 10.6 µm (up to >25 mm CA)*
Laser induced damage threshold:
>100 W/cm2 CW or > 2 J/cm2 100 ns pulsed for mechanically ruled polarizers