| 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. |  |
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| Diameter | φ10.0 | φ12.7 | φ15.0 | φ20.0 | |
| Part No. | WPA1610 | WPA1612 | WPA1615 | WPA1620 | |
| Material: | Optical grade Crystal Quartz and MgF2 |
| Dimension Tolerance: | +0.0, -0.2mm |
| Wavefront Distortion: | < l/ 8@633nm |
| Retardation Tolerance: | < 1/200 |
| Surface Quality: | 20/10 Scratch and Dig |
| AR Coating: | R<0.2% at center wavelength |
| Standard wavelength: | VIS :465-610nm, NIR:700-1000nm, IR:1200-1650nm |