18 Sep 2009 Unlike standard waveplate, Achromatic waveplate can provide a constant retardation on a wide wavelength range. 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: Quartz + MgF2
Dimension Tolerance: +0.0/-0.2mm
Wavefront Distortion: λ/4 @632.8nm
Retardation Tolerance: λ/100
Parallelism: <10 arc second (for cemented type)
Surface Quality: 20/10 scratch and dig
Clear Aperture: >90% central area
Coating: Available
Standard Wavelength: 450-650nm, 550-750nm, 650-1100nm, 900-2100nm |
