Brewster Window
The base of Brewster window is not coated, and is usually used as a polarizer. When placed at Brewster angle, the P-polarization component of the beam passes through the window without loss, and the S-polarization component is reflected by the Brewster window. Brewster window is commonly used in laser cavity.

Material:                        BK7 Optical glasses,CaF2,BaF2, MgF2,Ge,Si,Fused Silica

Diameter Tolerance:     +0.0/-0.02mm

Thickness Tolerance:    ± 0.01mm

Surface Accuracy:        λ/4 @632.8nm

Surface Quality:           20-10

Clear Aperture:            > 90%

Parallelism:                   <10 arc seconds

Bevel:                          0.2mm×45°

Coating:                      user-defined