Non-polarising Infra-red Beamsplitters

These non-polarising beamsplitters are intended for use at specific laser wavelengths in the infra-red spectral region. They produce the same reflectance for both s- and p- components thereby leaving the state of polarisation unchanged while splitting the incoming beam into two parts.

These beamsplitters have an all-dielectric splitter coating on one side and an anti-reflection coating on the other.  They are available on either Zinc Selenide or Germanium substrates.

Mirrors are optimised for use at the chosen laser wavelength for 45° angle of incidence.  Any reflectance from 1% to 99.5 % may be selected.  All common IR laser wavelengths can be accommodated.

Standard diameters are 9.53, 12.7, 19.1, 25.4, 17.9, 38.1, and 50.8 mm.   Thickness ranges from 2 to 5 mm as appropriate to control the flatness specification.

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