The 05RP32-1064 from Newport is a True Zero-Order Wave Plate that has a birefringent polymer film cemented between two high-precision, high efficiency, broadband antireflection coated N-BK7 windows. It provides excellent transmitted 1064 nm wavefront quality and λ/2 retardation, while minimizing beam deviation and surface reflection losses. The assembly is mounted in a 12.7 mm outer diameter black anodized aluminum housing for protection and ease of mounting and has a 5.1 mm clear aperture.