The 38 mm and 50 mm zero order wave plates provide users with a high-power crystalline quartz retarder with a free aperture of 34 mm or 46 mm. The waveplates are air spaced and have a stainless steel spacer between two crystalline quartz plates, which form the zero order capability. They are much less sensitive to temperature fluctuations than multiple order waveplates and have a higher thermal stability and power draw than contacted or cemented waveplates.
| waveplates | 38 mm and 50 mm zero order |
| Thickness | 0.3 to 1.3 mm |
| Wave front deformation | λ/10 @ 632.8 mm |
| Surface quality | 10/5 scratch/dig |
| Parallelism | 0.5 seconds |
| Retardance tolerance | ±0.005 λ @ 632.8 nm |
| Coating | Antireflective, R < 0.25% per surface |
| Damage threshold | 1 kW/cm2 – CW, 3.5 J/cm2 @ 10 ns |
| Diameter | 38.1 mm, +0.00/-0.25 mm without retaining ring; 50.8 mm, +0.00/-0.25 mm in retaining ring or 50.8 mm +0.00/-0.25 mm without retaining ring, 76.2 mm +0.00/-0.25 mm in retaining ring |
| Thickness in retaining ring | 9.0 mm, +0.00/-0.25 mm |
