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.



Specifications

Material

Crystal Quartz+MgF2

Dimension Tolerance

+0.0/-0.1mm

Wavefront Distortion

λ/[email protected] (for air spaced type)

Retardation Tolerance

λ/100

Parallelism

<10 arc seconds (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

Both sides AR coated

Epoxy Cemented or Air Spaced Available

Other Wavelength Available




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