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True Zero Order Waveplate

True Zero Order WaveplateTrue Zero Order Waveplates are constructed of a crystal quartz waveplate in contact with a high precision BK7 glass window. As the waveplate is very thin and easy to be damaged, the Bk7 plate's function is to strengthen the waveplate. A dual-sided anti-reflection (AR) coating helps minimize surface reflection losses and return loss.


- Cemented by Epoxy

- Retardations of λ/2 and λ/4

- Wide Angle Acceptance

- Wide Wavelength Bandwidth

- Better Temperature Bandwidth

True Zero Order Waveplates Specifications:



 Crystal Quartz, laser quality




 λ/4 and λ/2

 Retardance Tolerance

 < λ/300

 Dimension Tolerance


 Clear Aperture

 > 90% central

 Wavefront Distortion

 λ/8 @632.8nm


 < 1 arc second

 Surface Quality

 20-10 scratch-dig

 AR Coating

 R < 0.25%

 Damage Threshold

 > 500mJ/cm2, 20ns, 20Hz @1064nm

Ordering Information:

      Description:   True Zero Order WavePlate

      Part Number:  WPZT–Retardance–Wavelength–Dimension–Coating–Mount

      Retardance:  λ/2 or λ/4       

      Wavelength: 405nm,488nm,532nm,546nm,632.8nm,670nm,780nm,808nm,850nm,980nm,


       Dimension:   Φ10.0mm, Φ12.7mm, Φ15.0mm, Φ20.0mm, Φ25.4mm, Φ30.0mm or Others

       Coating:     AR coating or Uncoated

       Mount:      Φ25.4mm, Φ30.0mm or Unmounted