Variable Spiral Plate Specs
| Features | Spiral Plate |
| wavelength range | 400-1700 nm |
| Phase retardance | electrically adjustable (0-5V AC) |
| Available topological charges (fixed during manufacturing) | q=0,5 standard q=1 and higher on demand |
| Orbital momentum | +/- 1 |
| Active area | 12 mm diameter |
| Transmission | better than 85% (in the VIS) |
| Retarder material | Nematic Liquid-Crystal |
| Substrate material | Glass bk7 |
Local extinction ratio (input Intensity/ouput intensity)
when placed between crossed polarizers for radial Polarization configuration | ~100 @ 633nm |
| Output intensity homogeneity | < 1/100 RMS variation |
| Temperature range | 15° - 35° |
| Save operating limit | 300 W/cm2 CW
100 mJ/cm2 10 ns, 450-1500 nm
50 W/cm2 CW, below 450nm |
| Total size of the housing | 6 cm x 4 cm x 1.5 cm |
