Location of the system |
Nasmyth focus (IR) |
Spectral coverage |
0.9-5.3 um |
Main Optics |
2.7' FOV, F/13.9 |
Main optics throughput |
0.7 at JHKLM |
Number of control elements |
188 |
Deformable morror |
Bimorth mirror with 188 control electrodes |
Tip/tilt mount stroke |
+-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 |