k9/fused silica HR mirror,dielectric mirror glass

HR mirror means high reflective coating mirror.it's a type of optical component that achieves high reflection by alternately depositing multiple layers of media films with different refractive indices on a base. there have two type of substrate for optional, that is K9 and fused silica optional. How to choose K9 and fused silica substrate K9 VS Fused Silica K9 glass mirror  Fused silica mirror  Borosilicate optical glss with additives high-purity silicon dioxide amorphous( glass state) Low cost and extremely high value for money, excellent optical uniformity easy to process and polish the coefficient of thermal expansion extremely thermal staibility is outstanding,                             the laser damage threshold is extremely high, the light transmission range cover deep ultraviolet to near infrared                                                                excellent chemical stability and corrosion resistance coefficient of thermal expansion high, and it is pro…