Achromatic Wave Plate, 30.0 mm, λ/4, 610-850 nm

The 15RP54-1 Achromatic Wave Plate consists of two different birefringent crystals: crystalline quartz and magnesium fluoride (MgF2). Enclosed in a 30.0 mm housing, this 23.0 mm clear aperture wave plate has λ/4 retardation over a 610 to 850 nm wavelength range. It has a highly efficient broadband antireflection coating, in an air-spaced design. This construction ensures excellent 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 marked for alignment reference. Because of the air-space design, our Achromatic Wave Plates have a higher damage threshold than achromatic polymer film wave plates. Achromatic Wave Plates are also less expensive than achromatic polymer film wave plates.