Waveplate
Achroatic Waveplate
Achromatic waveplate is similar to Zero-order waveplate except that the two plates are made from different materials, such as crystal quartz and magnesium fluoride. Since the dispersion of the birefringence can be different for the two materials, it is possible to specify the retardation values at a wavelength range. Hence, the retardation of the resulting waveplate can be made to low sensitivity to wavelength change.
Based on the contact methods of two plates, we classify the achromatic waveplate to two types: Airspaced and Cemented.
Specifications:
Material: Crystal Quartz and MgF2
Dimension Tolerance: +0.0, -0.2 mm
Wavefront Distortion: l/4
@ 632.8 nm
Retardation Tolerance: up to l/100 at specified wavelength
Wavelength Range: see the attached table
Parallelism: up to 10 arc second
Surface
Quality: 20-10 scratch and dig
Standard Wavelength
VIS: 465nm-610nm
NIR: 700nm-1000nm
IR: 1200nm-1650nm
Cemented Achromatic
Waveplate |
Airspaced Achromatic
Waveplate |
|||
Part No |
φ(mm) |
Part No. |
Outside Diameter
D(mm) |
φ (mm) |
WPA1212 |
12.7 |
WPA1312 |
25.4 |
12.7 |
