What is calcium fluoride？
Calcium fluoride (CaF2) is a material with excellent optical properties and an ideal material for making FTIR windows.
It has high transparency in the infrared spectrum range, allowing infrared light to penetrate smoothly, thereby achieving spectral analysis of the sample.
In addition, calcium fluoride also has the characteristics of low refractive index, low chromatic aberration, and high damage threshold. Widely used in spectral analysis, fluorescence imaging, laser systems and other fields
Calcium Fluoride Benefits
Calcium fluoride (CaF2) windows are widely used in high-performance optical systems, especially in applications that require transmission of a wide spectral range from ultraviolet to infrared (approximately 175nm-7500nm).
This makes calcium fluoride windows ideal for a variety of spectroscopy applications. A lower refractive index (approximately 1.4), which reduces the reflection of light at the interface, thereby reducing the need for additional anti-reflective coatings.
Calcium fluoride has low dispersion (i.e., the extent to which the refractive index changes with wavelength), which helps reduce chromatic aberration in optical systems.
Calcium fluoride has good chemical stability to most environmental conditions, but prolonged exposure to moisture should be avoided as it will dissolve slowly in moisture and requires use and storage in a dry environment.
Relative to some other optical materials, calcium fluoride is soft and scratches easily, requiring care when handling and cleaning.
Specification
| Materials | CaF2 |
| Diameter | 5-300 mm |
| Diameter Tolerance | +0/-0.2mm |
| Thickness Tolerance | ±0.2mm |
| Transmittance Range | 170-7500nm |
| Wavefront Distortion | λ/8-λ/4@633nm |
| (S/D) | 40/20-20/10 |
| Parallelisms | <3′ |
| Clear Aperture | 90% |
| Bevel | <0.2*45° |
| Coating | Customization |