MWIR Variable Retarder

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MWIR Variable Retarder

Liquid crystal technology for polarization control now extends into the mid IR. Meadowlark’s standard line of polarization controllers can be used for these new variable retarders. They can be custom configured for use as variable attenuators and as polarization rotators.

  • 3600 to 5500 nm transmission
  • Non-mechanical polarization control
  • Computer controllable
  • Useful for variable attenuation

 

Specifications - MWIR Variable Retarder
Retarder Material Nematic liquid crystal
Substrate Material Anti-reflection coated germanium
Wavelength Range 3.6 µm to 5.7 µm
Maximum Retardance 1/2 λ at 4 µm*
Minimum Retardance 0.06 λ at 4 µm at 10 V
Reflectance ≤ 5% per external surface
Operating Temperature Range 0˚C to +50˚C
Response Times < 500 msec
 

 

Ordering Information - MWIR Variable Retarder
Clear
Aperture
in. [mm]
Diameter
± 0.005 in.
[± 0.13 mm]
Thickness
in. [mm]
Part Number
0.70
[17.8]
Ø2.00
[Ø50.8]
0.75
[19.1]
LVR-200-λ