A MgF2 optical window is made from crystalline Magnesium Fluoride. It is a hard and durable optical material that can be easily used under harsh conditions. It resists chemical etching as well as mechanical and thermal shock.
Magnesium Fluoride Window has excellent broadband transmission from deep ultraviolet to mid-infrared. As a result, they are an excellent choice for UV radiation sources and receivers, as well as for use in the Hydrogen Lyman-alpha line. They are frequently used as UV viewpoints and are an excellent choice for UV polarizers and excimer laser applications. It has a high transmittance between 120 nm and 8 m, and between 0.4 and 5.0 m, it transmits more than 90% of the time.
MgF2 is the only optical material that has a broad spectral transmission band as well as birefringence. This birefringence means that the refractive index is affected by light polarisation and propagation direction. Due to its birefringence, an MgF2 window can exhibit double refraction, causing a ray of light to be split into two rays with different paths by polarisation.
Sapphire Pistons
Pistons are a consumable component of the HPLC pump. The pistons in most pump designs are made of sapphire, but stainless steel pistons are used in some cases.
A sapphire piston has a hardness of approximately Rc 78, whereas a hard chrome-plated 316 stainless steel piston has a hardness of approximately Rc 65. In general, a hard piston and a BAL Seal have less adhesion than a soft piston and a BAL Seal. Lower friction leads to lower seal wear rates as adhesion is reduced.
Due to its better surface finish and nodular surface, seal life is longer with a sapphire piston than with a hard chrome-plated stainless steel piston. It is always recommended to look for a reputed and renowned manufacturer to buy hag quality optical materials and components at competitive prices.
