Air-Spaced Polarizers
These products exhibit higher transmission and better damage threshold than calcite polarizers, and do not produce the unwanted beam displacement associated with Brewster-type polarizers.
Standard Specifications
| Type 1 | Type 2 | Type 3 | |
| Polarization transmittance, TP | > 98.0% | > 97.5% | > 97.0% |
| Contrast ratio, TP / TS | > 500:1 | > 500:1 | > 500:1 |
| Damage threshold @ 1064 nm, 20 ns pulse | 500 MW / cm2 | 500 MW / cm2 | 300 MW / cm2 |
| Transmitted wavefront distortion @ 633 nm | < 1 / 8ë | < 1 / 8ë | < 1 / 4ë |
| Transmitted beam deviation | < 2 arc minutes | < 3 arc minutes | < 3 arc minutes |
| Reflected beam deviation | < 4 arc minutes | < 4 arc minutes | < 4 arc minutes |
| Acceptance angle | +0.5° to -0.5° | +0.5° to -0.5° | +0.5° to -0.5° |
| Surface quality, scratch-dig | 20 - 10 | 40 - 15 | 60 - 20 |
| Surface reflectivity | < 0.15% | < 0.25% | < 0.25% |
| Operating temperature range | -40 °C to +70 °C | -40 °C to +70 °C | -40 °C to +70 °C |
| Standard wavelength | 1064 nm | 1064 nm | 1064 nm |
Note: Please contact a Sales Representative if you desire detailed information on Type I Quality Air Spaced Polarizers.