CaF₂ Protective window

Calcium fluoride protective windows are optical protection components made from calcium fluoride (CaF₂) crystals, characterized by the following features: 1. Wide transmission range: They exhibit excellent light transmission performance from 0.13μm to 8.0μm wavelength, covering ultraviolet, visible, and near-infrared bands, making them suitable for various optical systems. 2. Low absorption and high damage threshold: With low absorption coefficient, they can withstand high-power laser irradiation, making them ideal for high-energy optical applications such as excimer lasers. 3. Low dispersion and low fluorescence: They have a small dispersion coefficient (Abbe number approximately 95) and weak fluorescence characteristics, which help reduce chromatic aberration and background interference in optical systems. 4. Mechanical and chemical stability: With a Mohs hardness of 4, they possess stable mechanical properties, are non-hygroscopic, and resistant to certain chemical corrosion. However, protection is needed in high-temperature (above 600°C) or high-humidity environments. 5. Customizability: They can be customized to different sizes, thicknesses, and crystal orientations to meet the installation and performance requirements of various optical systems. Calcium fluoride protective windows are commonly used in laser systems, spectral analysis, thermal imaging, vacuum viewports, and are an ideal choice for protecting optical components from environmental interference and radiation damage.