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Table 1.
Servo-stabilized interferometer system characteristics.
| Fabry-Perot interferometer | |
|---|---|
| Manufacturer | IC optical systems |
| Type | ET50 FS |
| Aperture | 50 mm |
| Material | Fused silica |
| (minimal inhomogeneity) | |
| Plate wedge | 20 arcmin |
| Cavity spacing | 3.000 mm ± ∼0.005 mm |
| Coating | Multilayer broadband |
| Wavelength range | 400 nm−700 nm |
| Estimated cavity errors | λ/100 (PV @ 632.8 nm, after |
| coating, over central 35 mm) | |
| Nominal reflectance | 95% ± 3% |
| Estimated step (Δ) | ∼0.46 nm |
| Tilt control estimated precision (X, Y) | ∼1.4 × 10−3 arcsec |
| Controller | |
| Manufacturer | IC optical systems |
| Type | CS100 |
| Digital resolution (N) | 12 bits/4096 steps |
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