Influence of photosensor noise on accuracy of cost-effective Shack-Hartmann wavefront sensors

Details Influence of photosensor noise on accuracy of cost-effective Shack-Hartmann wavefront sensors Influence of photosensor noise on accuracy of cost-effective Shack-Hartmann wavefront sensors

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011spie.8149e..15k&link_type=abstract

Astronomical Adaptive Optics Systems and Applications IV. Edited by Tyson, Robert K.; Hart, Michael. Proceedings of the SPIE,

Physics

Optics

Scientific paper

A Shack-Hartmann (SH) wavefront sensor (WFS) is used in most modern adaptive optics systems where precision and robustness of centroiding are important issues. The accuracy of the SH WFS depends not only on lenslet quality but also on the measurement accuracy of centroids, especially in low-light conditions. In turn, accuracy depends on light and dark noises that are inevitably present in solid-state photosensors. Using a comprehensive mathematical model of the CMOS photosensor, the accuracy of the Shack-Hartmann wavefront sensor is assessed and analysed for each type of noise. In this paper, new results regarding the influence of different noise sources from a CMOS photosensor on centroiding in Shack-Hartmann wavefront sensors are presented. For the numerical simulations, a comprehensive mathematical model of photosensor's noise was formulated. The influences of light and dark noises as well as pixelisation factor have been assessed. Analysis of the wavefront sensor's accuracy is provided. Results should be of interest for further development of cost-effective wavefront sensors.

Affiliated with

Also associated with

No associations

Rating

Influence of photosensor noise on accuracy of cost-effective Shack-Hartmann wavefront sensors 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 Influence of photosensor noise on accuracy of cost-effective Shack-Hartmann wavefront sensors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Influence of photosensor noise on accuracy of cost-effective Shack-Hartmann wavefront sensors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1461586