AO188 Instrument Parameters
| Parameter | Description |
|---|---|
| Location of the system | Nasmyth focus (IR) |
| Spectral coverage | 0.9-5.3 Β΅m |
| Main Optics | 2.7' FOV, F/13.9 |
| Main optics throughput | 0.7 at JHKLM |
| Number of control elements | 188 |
| Deformable mirror | Magnetic mirror with 3228 actuators |
| Tip/tilt mount stroke | Β±5'' |
| High-order WFS | Curvature sensor with 188 photon counting APDs |
| Low-order WFS | 2x2 Shack-Hartman sensor with 16 photon counting APDs |
| Control bandwidth | > 100 Hz, 1000 corrections/sec |
| NGS magnitude | -1 < R < 16.5 |
| TTGS magnitude | R < 18 |
| NGS isoplanatic field | 1' in diameter |
| TTGS isoplanatic field | Not determined |
| Laser | CW 20.0W (on-sky) at 589nm (generates R=8.5-10.0 LGS) |
| Laser beam transfer optics | Mirrors (total throughput > 90%) |
| Laser launching telescope | 50cm telescope attached behind the secondary |
updated on August 01, 2024