Phase retardation coating can generate particular phase shifting between S and P polarized quantities of incident CO₂ laser beam. It can be used on coating of 0° phase shifting to retain incident polarization of reflective beam. It can be coating of λ/4(90°)phase shifting to transfer linear polarized beam to circularly polarized beam, or λ/8(45°)to transfer linear polarized beam to elliptically polarized beam.
Boxin has been continuously upgrading its coating facilities. At present, Boxin has 10 sets of advanced local and foreign made coating machines and customize various optical coating layers according to customer inquiries.
Boxin has established a completed coating inspection system, equipped with Hitachi u-4100 , FTIR-920 IR, american-made PE-Lambda 950 spectrometers and other advanced coating inspecting equipment, and also, Boxin independently developed the Laser-induced Damage Threshold machine to accurately testing LIDT coatings, so as to provide customers with high-quality LIDT coatings.