Brewster Window

Brewster Windows are high-precision optical components leveraging material optical characteristics, engineered for high-purity linearly polarized light acquisition. At the material’s Brewster angle, S-polarized light is partially reflected while P-polarized light achieves nearly full transmittance with minimal optical loss.

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Material	Optical Glass, N-BK7, H-K9L,etc.
Dimensional tolerances	+/-0.05, +/-0.1mm
Surface Flatness	λ/10~1λ
Wedge Angle	< 30 arc seconds, <2 arc min
Surface Quality	10/5,20/10,40/20
Edge Chip	<0.1mm
Bevel	Protective bevel, or based on clients’ requests
Clear Aperture	>90%
Coating	According to customer's request

AOS Optics’ Brewster Windows are high-precision optical components engineered for high-purity linearly polarized light acquisition, leveraging premium optical materials’ intrinsic reflection and transmission characteristics. Based on the Brewster angle principle, they realize precise polarization separation: incident light striking the surface at the material’s specific Brewster angle results in partial reflection of S-polarized light and nearly complete transmittance of P-polarized light, enabling efficient, low-loss linearly polarized light extraction for professional optical polarization control.

Core advantages include laser-grade surface quality & parallelism, a high aperture ratio, and minimal transmitted wavefront distortion. This optimized optical performance ensures stable, reliable operation in high-precision laser systems, making the windows ideal for laser cavity integration. With consistent polarization separation efficiency and long-term working stability, they are a premium choice for laser technology and precision optical instrument fields.

These high-performance Brewster Windows are widely applied in key optical and laser scenarios: laser resonators, polarized optical control systems, industrial laser processing equipment, high-precision spectral analysis instruments, and optical detection setups. They meet the rigorous polarization control demands of both scientific research-level optical experiments and industrial-grade laser system integration, providing solid support for the stable operation of diverse high-precision optical applications.

Flexible and comprehensive customization options are available to match your specific application requirements. We offer a full range of optical substrate materials paired with diverse coating solutions: uncoated versions for general use; UV/VIS/NIR/SWIR anti-reflection (AR) coatings for enhanced transmittance; and custom metal coatings (gold, silver, aluminum) for targeted optical performance. Beyond standard configurations, AOS Optics provides fully customized Brewster Windows tailored to your detailed drawing requirements, including custom dimensions, optical parameters, and coating configurations, perfectly meeting personalized optical system design needs.

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