SBIG - AO-8T

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The SBIG AO-8T is designed for the STT Camera Series.  It requires the FW8G-STT Filter Wheel or STT Remote Guide Head and OAG to operate the AO-8T. Adaptive optics help compensate for typical small movements for clearer images.

SKU: SBI-AO-8T
Manufactured by:
Santa Barbara Instrument Group (SBIG)
 

Product Description

The SBIG AO-8T is designed for the STT Camera Series.  It requires the FW8G-STT Filter Wheel or STT Remote Guide Head and OAG to operate the AO-8T.  This is the same AO as the model AO-8 with a different back plate to match the STT Camera series hole patterns.  If you already have an AO-8, it can be converted to an AO-8T by changing just the back plate.

Adaptive optics can dramatically improve your image stability by compensating for a mount's periodic error, which nearly all mounts exhibit to one severity or another.  By adapting to these minute movements to the field of view, resulting images captured have pinpoint perfect stars for greater apparent image clarity and perceived resolution.   Adaptive Optics do require an off axis guide camera behind AO, and is compatible with the SBIG Remote Guide Head for customized guiding systems.   

Adaptive Optics

The images below are actual star images showing the effect of image wander corrected at 1 Hz and 10 Hz:

  • ao_mov_1hz1 Hz Corrections
  •  
  •  
  • ao_mov_10hz
    10 Hz Corrections

And the resulting size of the star image in a long exposure:

  • aox-1hz-corrected
    1 Hz Corrections
  •  
  • aox-10hz-corrected
    10 Hz 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:

ao_1hz

However, at a 5Hz correction rate, the faster jitter is reduced:

ao_5hz

And at a 10 Hz correction rate, significant improvement is seen:

ao_10hz

The improvement in stellar profiles can also be seen at corrections above 1 Hz.  First by looking at the non-AO guided image:

aox_img2

And comparing the non-AO guided image to the AO guided image there is again significant improvement in the FWHM of the star profile:

ao_img2

Telescope mounts cannot correct faster than about once per second.  The 10Hz rate of the AO will clearly result in improved resolution under the right conditions.

 

 

Specifications

Name SBIG - AO-8T
Manufacturer Santa Barbara Instrument Group (SBIG)
Model SBI-AO-8T

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