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38.1mm, ISP Optics Calcium Fluoride Equilateral Prism | CF-EP-38

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Stock #25-042 3-4 days
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Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Surface Quality:
Equilateral Prism
Dimensional Tolerance (mm):
Angle Tolerance (arcmin):
Clear Aperture (%):
Length of Hypotenuse (mm):
Length of Legs (mm):
Wavelength Range (nm):
200 - 7000
Wavelength Range (μm):
0.2 - 7
Surface Flatness (P-V):
Model Number:

Regulatory Compliance

RoHS 2015:
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
  • Due to material supply chain disruptions with germanium, there may be increased lead times and price changes on our germanium products. For more information, please contact our customer service team.

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.