|  Substrate Material: | 
 Crystal Quartz | 
|  Outer Diameter: | 
 20.0,+0.0/-0.1mm,unmounted | 
| 
  Waveplate Type: 
(Single-plate design)  | 
  Low-order (n<5), Quarter-wave @ 852nm     | 
|  Crystal Thickness: | 
 0.216mm (per 4th-order design) | 
|  Parallelism: | 
 < 2 arc seconds | 
|  Retardance Accuracy(typ):  | 
 < Lambda/300 @ designed wavelength | 
|  Wavefront Distortion: | 
< Lambda/10 at designed wavelength | 
|  Surface Quality: | 
 20/10 scratch and dig | 
|  Damage Threshold: | 
 2J/cm2 @ 10ns 1064nm | 
|  AR Coating/Both Surfaces: | 
 AR/AR @ 852 +/-10nm (R<0.25%) | 
| MOQ: | 
MOQ50pcs(minimum order quantity)  |