Brewster window is a transparent flat plate window that is precisely cut and installed in an optical system (especially a laser resonator), so that its surface forms a Brewster angle with the incident beam. The specific applications are highly concentrated in the field of laser technology, which is an indispensable key component for many types of lasers. The core of its application revolves around the principle of using Brewster angle to control the polarization state of light and greatly reduce optical losses.
Features of Brewster Windows
Brewster uv fused silica windows are used for larger angles of incidence to present a circular cross-section of the incident beam at Brewster's angle.
Our customers are coating the surface of the brewster angle prism window with metal coatings (Al, Ag, Au) for enhanced reflection of aluminum, and dielectric coatings with high laser damage threshold.
Specification of Brewster Windows
Material UV Fused silica / N-BK7
Surface quality 10/5 – 20/10
Transmitted wavefront distortion (TWD) λ/10@632.8nm
Brewster angle 55°32'– 55°57' @633nm
Parallelism 5 arc sec.
Minor Diameters
（mm） Thickness
（mm）
6 1
6 2
8 1
8 2
10 2
12.5 2
13 2
16 2
20 2
22 2
25 2
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ECOPTIK has significant professional capabilities and rich production experience in the field of optical lenses, capable of producing professional optical lenses in medical, defense, astronomy, industrial and photography fields.
