Achromatic waveplateprice

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.

Superachromatic Waveplate

The damage threshold for the achromatic waveplate is >500mJ/cm2, 20ns, 20Hz @1064nm for cemented type and >5J/cm2, 20ns, 20Hz @1064nm for air spaced type.

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Material Crystal Quartz+MgF2 Dimension Tolerance +0.0/-0.2mm Wavefront Distortion λ/4@632.8nm (for air spaced type) Retardation Tolerance λ/100 Parallelism Surface Quality 40/20 scratch and dig Clear Aperture >90% central area Standard Wave quarter-wave(λ/4), half-wave(λ/2) Standard Wavelength

Thorlabsachromatic waveplate

An achromatic waveplate is similar to a zero order waveplate, but it is made from two different birefringent crystals, which allows for a broader wavelength range.

450-650nm550-750nm650-1100nm900-2100nm Coating Both sides AR coated, R<1% per face Damage Threshold Cemented: >500mJ/cm2, 20ns, 20Hz @1064nmAir spaced: >5J/cm2, 20ns, 20Hz @1064nm