Crysmit provides Multiple Order Quarter Waveplates (for rotation of the polarization plane) and Multiple Order Quarter Waveplates (for conversion between linear polarization and circular polarization) of single plate structure, made from Quartz or Magnesium Fluoride (MgF2). Quartz Multiple Order Waveplates could be applied for quarter or half-wave retardations for wavelengths ranging from the UV to the NWIR spectral. MgF2 Waveplates could be applied for quarter or half wave retardations for wavelengths up to the MWIR (maximum 7000nm) region. If you are seeking solutions for large-scale and Multiple-cost production, Our Multiple Order Waveplates are just right for you. Standard and customized Multiple Order Waveplates are available in Crysmit with fast delivery and Low price. 

Resources Finding the Axis?

Finding the fast axis of each waveplate is a critical step when using the waveplates. The mounted waveplates offered by Crysmit are all designed with their fast axes indicated as a straight light on the mount. While the fast axis of the unmounted versions is all marked directly on the waveplates. However, if it happens that the axes are not indicated or the indications are blurred, there is a simple method to help you find the axes which apply for waveplates with all values of retardations. First, place a polarizer in front of the laser device, tilt the polarizer until the light is extinct, then interpose the waveplate between the laser device and the polarizer, rotate the waveplate so that the eventual light output is still extinct——and viola! you have found an axis successfully! 

Adjustments?

Additionally, It might happen that you find the waveplates you bought might not produce exactly the designed retardation. There are plenty of reasons: e.g. the waveplates are not designed for your wavelength of interest, or there are external factors such as temperature affecting the retardation. The small deviations could be modified by rotating the plane of polarization towards the fast or slow axis of the waveplate. Moving towards the fast axis reduces the retardation while moving towards the fast axis raises the retardation. Try both directions and keep checking the improvements using polarizers.