title: Shack-Hartmann sensor improvement using optical binning.
abstract: We present a design improvement for a recently proposed type of Shack-Hartmann wavefront sensor that uses a cylindrical (lenticular) lenslet array. The improved sensor design uses optical binning and requires significantly fewer detector pixels than the corresponding conventional or cylindrical Shack-Hartmann sensor, and so detector readout noise causes less signal degradation. Additionally, detector readout time is significantly reduced, which reduces the latency for closed loop systems and data processing requirements. We provide simple analytical noise considerations and Monte Carlo simulations, we show that the optically binned Shack-Hartmann sensor can offer better performance than the conventional counterpart in most practical situations, and our design is particularly suited for use with astronomical adaptive optics systems.
authors: Department of Physics, South Road, Durham, DH1 3LE, UK. a.g.basden@durham.ac.uk
authors: Alastair
authors: A
authors: Basden
authors: Deli
authors: D
authors: Geng
authors: Dani
authors: D
authors: Guzman
authors: Tim
authors: T
authors: Morris
authors: Richard
authors: R
authors: Myers
authors: Chris
authors: C
authors: Saunter