Infrared BaF2 Lens
Barium fluoride (BaF₂) is an important inorganic optical material widely used in optical systems in the ultraviolet, visible and infrared wavelengths. What are the disadvantages of barium fluoride? Low hardness: easy to scratch, need protective measures. Poor thermal stability: high coefficient of thermal expansion, performance degradation at high temperature. High cost: high material and processing costs.
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