Calcium Fluoride (CaF2)

Overview

Calcium Fluoride (CaF2) is a broadband optical material used where UV through infrared transmission, low dispersion, and a relatively low refractive index are important to the system design. It is commonly reviewed for windows, lenses, and prisms in spectroscopy, imaging, and laser assemblies.

For engineering selection, CaF2 is usually considered when chromatic control, broad wavelength coverage, or compatibility with UV to mid-infrared optical paths matters more than high refractive power. Final material choice should still be checked against wavelength band, coating target, thermal environment, and mounting method.

Why CaF2 Matters in Optical Design

• Broad transmission from 0.2 to 9.0 µm supports UV, visible, and infrared optical paths in one substrate family.
• Low refractive index and low dispersion help reduce chromatic error in broadband lens designs.
• Good thermal and mechanical stability make CaF2 practical for precision optics, spectroscopy hardware, and selected laser systems.
• The material is commonly specified for custom windows, prisms, and low-dispersion lens components where drawing-based review is required.

Key Material Reference

Selected Refractive Index Reference

The source file included a full wavelength-index list. The complete reference table below is suitable for page review, but final optical modeling should still be checked against the confirmed wavelength range and temperature condition of the actual design.

Typical Applications

• UV and IR windows for spectroscopy and analytical instruments
• Low-dispersion lenses for broadband optical assemblies
• Prisms and beam path components for imaging and measurement systems
• Laser optics where wavelength coverage and thermal behavior must be balanced

Engineering Notes

If you are comparing substrate options, review both the material index and the available CaF2 optics categories. For drawing-based parts, engineers usually need the wavelength band, aperture or clear aperture, thickness, coating target, and operating environment before confirming whether a CaF2 window or a custom lens geometry is the better fit.

Request Engineering Review

Send your wavelength range, dimensions, quantity, coating requirement, and application notes through the contact page for a practical review of CaF2 material suitability and manufacturability.