25.4mm, ISP Optics Zinc Selenide Equilateral Prism | ZC-EP-25

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Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Zinc Selenide (ZnSe)
Surface Quality:
Equilateral Prism
Dimensional Tolerance (mm):
Angle Tolerance (arcmin):
Clear Aperture (%):
Length of Hypotenuse (mm):
Length of Legs (mm):
Wavelength Range (nm):
600 - 18000
Wavelength Range (μm):
0.6 - 18
Surface Flatness (P-V):
Model Number:

Regulatory Compliance

Certificate of Conformance:

Product Family Description

  • CaF2, Ge, and ZnSe Substrates
  • Ideal for Wavelength Separation
  • Designed for Use with Collimated Sources
  • Additional Infrared Optics Available

ISP Optics Infrared (IR) Equilateral Prisms, also referred to as dispersion prisms, feature three equal 60° angles and are used in wavelength separating applications. These prisms are available with calcium fluoride (CaF2), germanium (Ge), or zinc selenide (ZnSe) substrates. CaF2 equilateral prisms offer a low refractive index and broad transmission range from 0.2 – 7µm, making them ideal for applications requiring high transmission from the UV through the IR. Ge equilateral prisms are transmissive from 2 – 14µm with a high index of 4.002 at 11µm and are used in applications where the optical path length needs to be maximized. ZnSe equilateral prisms have high, even transmission from 0.6 - 18µm and are typically integrated with CO2 laser systems that feature a 632.8nm HeNe alignment laser and 10.6µm output beam.

Note: Special care should be taken when handling Zinc Selenide as it is a toxic material. Always wear rubber or plastic gloves to avoid risk of contamination.