Material: Crystal Quartz, MgF2 

 Custom dimension and shapes

 Diameter from 5 to 100 mm

 Clear aperture: Central 90% of diameter

 Transmission wavefront: λ/10@632.8nm

 Surface quality: 10-5 S/D

 Parallelism:＜3″

 Retardation accuracy: λ/500 

 Standard and custom coating options available

 High laser damage threshold

 Mounted and unmounted waveplates are available