|Surface Quality||20/10 S/D||Parallelism||<1 arc Sec|
|Retardation Tolerance||< λ/500||Damage Threshold||>500 MW/cm2|
|Coating||AR coating||Mount||D1” mounted|
Zero order waveplates is constructed of two low order waveplate with their axes crossed, the effect of the first plate is canceled by the second,except for the residual difference between them. They are made from quartz, are suitable for high energy lasers.