- Rhomb Retarder
- ZnSe Prism
Fresnel Rhomb Retarder has a broader range of wavelengths than waveplate, depending on the refractive index and the geometry of the material. We offer a half-wave Rhomb Retarder made up of ZnSe material to utilize in the LWIR range.
In this retarder, the light undergoes two total internal reflections to impart a retardance of λ/2 when the input light is shined normal to the input face. The input and output lights are perpendicular to the input and output faces of the retarder.
Material: Zinc Selenide (ZnSe)
Working Wavelength Range: 7-13 µm
Clear Aperture: 15 x 15 sqmm rectangle or customized
Dimensional Tolerance: +0.0/- 0.1mm
Retardance Tolerance: 2%
Surface Quality: 60/40 scratch and dig
Coating: 7-13 µm on input and output surface only