In the infrared region, the absorption coefficients of the nine crystal forms are all 0, and the reflectivity and refractive index are very low. They can be used as infrared light transparent materials, such as night vision devices.
In the infrared region, the absorption coefficient of the nine crystal forms is 0, and the reflectivity and refractive index are very low. They can be used as infrared transparent materials, such as night vision instruments.
In the infrared region, the absorption coefficient of the nine crystal forms is zero, and the reflectivity and refractive index are very low, so they can all be used as infrared transparent materials, such as night vision devices.