Request InfoMKS/NewportNewport Corp. has introduced large-diameter achromatic zero-order quartz-MgF2 Wave Plates. The large-aperture optics consist of two birefringent crystals — crystalline quartz and magnesium fluoride (MgF2) — each with an efficient broadband antireflection coating, in an air-spaced design. The construction ensures good transmitted wavefront quality, while minimizing beam deviation and surface reflection losses. The assembly is mounted in a black anodized aluminum housing for protection and ease of mounting, with the retarder fast axis reference marked for alignment. 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