Achromatic waveplate is made from two different substrate materials such as crystal quartz and magnesium fluoride. For the single material, waveplate’s working wavelength is very limited because of the dispersion of the material. Achromatic Waveplate uses two different kinds of materials with the different dispersion and such waveplate is not sensitive to the wavelength change.
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. In other words, it can be used at a broadband wavelength range.
Material: Quartz and MgF2, Birefringent crystals
Wavelength Range: 200～2300 nm,
Dimension Tolerance: +0.0, -0.2mm
Surface Quality: 40 / 20
Parallelism: <10 arc Sec (Cemented type)
Wavefront Distortion: < λ/4@633nm (Air spaced type)
Retardation Tolerance: < λ/100
Clear Aperture: >90%
Damage Threshold: >10 MW/cm2
Ravg<1.5%@wavelength or Uncoated
Standard: 1/4,Quarter wave and 1/2 Half.
• Epoxy Cemented or Air Spaced
• Thickness 0.5~3mm
• Wide Bandwidth
Standard wavelength: 460-650nm, 550-750nm,650-1000nm,900-2100nm.
Other wavelengths and sizes are available upon customer request
Also, please indicate the following requirements, when you have a demand on our waveplate products
2.Cemented or Air Spaced