SBIG Adaptive Optics - AO-X
The AO-X is a new large aperture AO for the STX and STXL cameras. It requires the FW8G-STXL Filter Wheel or STT-STXL Remote Guide Head and OAG to operate the AO-8X. This is a new AO design that minimizes the backfocus requirement while offering a large (3" aperture) optical element to cover the 16803 CCD. It is also recomended for the STXL-11002 and STXL-6303.
The images below are actual star images showing the effect of image wander corrected at 1 Hz and 10 Hz:
Left: 1Hz Corrections
Right: 10Hz Corrections
Other data gathered by Brad Wallis of JPL (Brad Wallis and Benoit Schillings developed the prototype for the original AO-7) show the the effect of rapid corrections on poor seeing. At 1 Hz the larger, slower component is reduced, but the amplitude of the jitter remains about the same:
However, at a 5Hz correction rate, the faster jitter is reduced:
And at a 10 Hz correction rate, significant improvement is seen:
The improvement in stellar profiles can also be seen at corrections above 1 Hz. First by looking at the non-AO guided image:
And comparing the non-AO guided image to the AO guided image there is again significant improvement in the FWHM of the star profile:
Telescope mounts canot correct faster than about once per second. The 10Hz rate of the AO-X will clearly result in improved resolution under the right conditions.
|Manufacturer||Santa Barbara Instrument Group (SBIG)|