The 20LP-NIR Precision Linear Polarizers is constructed by laminating a polymer polarizing film between two high-precision glass or fused silica windows. Each window has a high-efficiency 1100 to 1750 nm broadband NIR antireflection coating. The assembly is mounted in a 2 inch (50.8 mm) diameter black anodized aluminum housing for protection and provides a 30.5 mm clear aperture. The transmission axis is clearly marked. The result is a linear polarizer with high transmission and low wavefront distortion that are easy to mount.