产品品牌：

Union Optic

产品型号：

WPA

Achromatic waveplate is similar to zero order waveplate except that the two plates are made from different birefringent crystals. Since the dispersion of the birefringence of two materials is different, it is possible to specify the retardation values at a broad wavelength range. So, the retardation will be less sensitive to wavelength change. In other words, it can be used at a broadband wavelength range. Specifications

Material Birefringent crystals Dimension Tolerance +0.0/-0.2mm Wavefront Distortion λ/ (for air spaced type) Retardation Tolerance λ/100 Parallelism <10 arc second (for single plate) Surface Quality 40/20 scratch and dig Clear Aperture >90% central area Standard Wave quarter-wave(λ/4), half-wave(λ/2) Standard Wavelength 450-650nm 550-750nm 650-1100nm 900-2100nm Coating Uncoated for standard, AR coating available

λ/2 Part No. λ/4 Part No. Diameter(mm) Type WPA2210 WPA4210 10.0 Cemented WPA2215 WPA4215 15.0 WPA2225 WPA4225 25.4 WPA2410 WPA4410* 10.0 Air Spaced WPA2415 WPA4415* 15.0 WPA2425 WPA4425* 25.4