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What is Achromatic waveplate?
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.
Epoxy Cemented or Air Spaced available
Very Broad Bandwidth
Custom size available
Birefringent crystals and MgF2
< λ/4 @632.8nm (for air spaced type) or λ/ 8@633nm
λ/100 or λ/200
<10 arc second (for cemented type)
40/20 or 20/10 Scratch and Dig
>90% central area
quarter-wave (v/4), half-wave (λ/2)
450-650nm, 550-750nm, 650-1100nm, 900-2100nm
Uncoated for standard, AR coating available
Other sizes, wavelength are available upon request.
λ/2 Part No.
λ/4 Part No.
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