A-Star can produce: Low Order Waveplate, Zero Order Waveplate, Dual Wavelength Waveplate, Achromatic Waveplate.
For the Low Order Waveplate, there are Low Order Waveplate and Multi-Order Waveplate.
For the Zero Order Waveplate, there are
Zero Order Waveplate-Cemented by Epoxy,
Zero Order Waveplate-Optical Contacted,
Zero Order Waveplate-Air Spaced,
True Zero Order Waveplate-Cemented,
True Zero Order Waveplate-Singlet Plate
For the detailed specifications please see each product link.

Low Order Waveplate

The low (multiple) order waveplate is designed to give a retardance of several full waves, plus the desired fraction. This result in a single, physically robust component with desired performance

Zero Order Waveplate

zero order waveplate is designed to give a retardance of zero full waves, plus the desired fraction. Zero order waveplate shows better performances than multiple order waveplates, it has broad bandwidth and a lower sensitivity to temperature and wavlenght changes. It should be considered for more critical online_orderings.

Dual Wavelength Waveplate

Dual wavelength waveplate is a multiple waveplate that provide a pecitfic retardance at two different wavelengths, it's particularly useful when used in conjunction with other polarization sensitive ...

Achromatic Waveplate

Unlike standard waveplates, Achromatic Waveplates, AWP, provide a constant phase shift independent of the wavelength of light that is used.