title: Sensing more modes with fewer sub-apertures: the LIFTed Shack-Hartmann wavefront sensor.
abstract: We propose here a novel way to analyze Shack-Hartmann wavefront sensor images in order to retrieve more modes than the two centroid coordinates per sub-aperture. To do so, we use the linearized focal-plane technique (LIFT) phase retrieval method for each sub-aperture. We demonstrate that we can increase the number of modes sensed with the same computational burden per mode. For instance, we show the ability to control a 21×21 actuator deformable mirror using a 10×10 lenslet array.
authors: Serge
authors: S
authors: Meimon
authors: Thierry
authors: T
authors: Fusco
authors: Vincent
authors: V
authors: Michau
authors: Cédric
authors: C
authors: Plantet
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D007090:Image Interpretation, Computer-Assisted / Q000295:instrumentation*; D007909:Lenses; D055096:Optical Devices; D014159:Transducers