Super Achromatic Waveplate

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Super Achromatic Waveplate is similar to achromatic waveplate but providing a flat retardance over a super broadband wavelength range. Normal achromatic waveplate consists of one quartz plate and one MgF2 plate, which has only few hundreds of nanometer wavelength range. Union Optic’s super achromatic waveplate is made from three material, quartz, MgF2 and sapphire, which can provide flat retardance on a broader wavelength range.


  • Flat Retardance Over a Super Broadband Range

  • Custom Size & Wavelength Available

  • RoHS Compliant


Material Crystal Quartz+MgF2+Sapphire
Dimension Tolerance +0.0/-0.2 mm
Surface Quality 60/40 scratch and dig
Clear Aperture >90 % central area
Wavefront Distortion <λ/4 @ 632.8 nm (for single plate)
Parallelism <10 arc seconds (for single plate)
Retardation Tolerance <λ/100
Standard Wave quarter-wave(λ/4), half-wave(λ/2)
Standard Wavelength 380-1100 nm, 600-2000 nm
Coating Upon request
Damage Threshold >500 mJ/cm2, 20 ns, 20 Hz @ 1064 nm
Type Cemented


Product Number Type Diameter[mm] Wavelength[nm] Retardation[λ] Mount[mm] CA[mm] Cart
SAW001 Cemented 20 380-1100 λ/4 / 18
SAW002 Cemented 20 380-1100 λ/4 φ25.4x6 18
SAW003 Cemented 20 600-2000 λ/4 φ25.4x6 18