Signal to noise ratio of layer-oriented measurements for multiconjugate adaptive optics

Details Signal to noise ratio of layer-oriented measurements for multiconjugate adaptive optics Signal to noise ratio of layer-oriented measurements for multiconjugate adaptive optics

Nov 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003a%26a...410.1101b&link_type=abstract

Astronomy and Astrophysics, v.410, p.1101-1106 (2003)

Physics

Optics

4

Instrumentation: Adaptive Optics, Techniques: High Angular Resolution, Methods: Analytical, Atmospheric Effects, Telescopes

Scientific paper

Multiconjugate adaptive optics (MCAO) employing several deformable mirrors conjugated to different altitudes has been proposed in order to extend the size of the corrected field of view. A three dimensional measurement of the turbulent volume is needed in order to collect the information to control the deformable mirrors. Given a set of guide stars in the field of view, this can be done either using star-oriented or layer-oriented techniques. In the star-oriented measurement each wavefront sensor is coupled to a guide star while in layer-oriented techniques, wavefront sensors are coupled to different layers in the atmosphere and each of them collect light from the whole set of guide stars. This type of measurement is more exactly called optical layer-oriented (OPTLO) as the co-addition of light is done optically. The same information can also be obtained by combining, in a numerical way, star-oriented measurements. This hybrid approach is called numerical layer-oriented (NUMLO). In order to compare their performance, we present an analytical study of the signal to noise ratio (SNR) in the optical and numerical layer-oriented measurements. Optical layer oriented measurements are shown to be more efficient in the regime of faint flux and a large number of guide stars, while low detector noise allows numerical layer-oriented schemes to be more efficient in terms of SNR.
Appendix A is only available in electronic form at http://www.edpsciences.org

Affiliated with

Also associated with

No associations

Rating

Signal to noise ratio of layer-oriented measurements for multiconjugate adaptive optics does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Signal to noise ratio of layer-oriented measurements for multiconjugate adaptive optics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal to noise ratio of layer-oriented measurements for multiconjugate adaptive optics will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1086205