In-flight measurement of atmospheric-imposed tilt: experimental results and analysis.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.460717
Abstract: The work presented here experimentally measures the tilt imposed on a laser beam by the atmosphere from Shack-Hartmann wavefront sensor measurements collected in-flight. Tip/tilt is imposed on the laser beam by propagating through optical turbulent… read more here.
Keywords: beam; tip tilt; flight measurement; measurement atmospheric ... See more keywords
Angle-of-arrival variability of retroreflected lasers despite atmospheric reciprocity.
Sign Up to like & getrecommendations! Published in 2022 at "Optics letters"
DOI: 10.1364/ol.453869
Abstract: Corner cube retroreflectors are commonly used as cooperative targets in free-space laser applications. The previous literature suggests that due to path reciprocity, a retroreflected beam is self-corrected across a turbulent atmosphere and should show no… read more here.
Keywords: arrival variability; angle arrival; reciprocity; optics ... See more keywords
Adaptive Youla-Kučera parametric control of unknown tip-tilt disturbance rejection in image stabilization systems.
Sign Up to like & getrecommendations! Published in 2022 at "Optics letters"
DOI: 10.1364/ol.460716
Abstract: We propose a new, to the best of our knowledge, adaptive control method to attenuate beam jitter in image stabilization systems, which breaks the restrictions of existing adaptive control methods in terms of time consumption… read more here.
Keywords: tip tilt; control; disturbance rejection;
Design, Simulation, Fabrication, and Characterization of an Electrothermal Tip-Tilt-Piston Large Angle Micromirror for High Fill Factor Segmented Optical Arrays
Sign Up to like & getrecommendations! Published in 2021 at "Micromachines"
DOI: 10.3390/mi12040419
Abstract: Micro-electromechanical system (MEMS) micromirrors have been in development for many years, but the ability to steer beams to angles larger than 20° remains a challenging endeavor. This paper details a MEMS micromirror device capable of… read more here.
Keywords: motion; micromirror; tip tilt; large angle ... See more keywords
A Tip–Tilt and Piston Detection Approach for Segmented Telescopes
Sign Up to like & getrecommendations! Published in 2020 at "Photonics"
DOI: 10.3390/photonics8010003
Abstract: Accurate segmented mirror wavefront sensing and control is essential for next-generation large aperture telescope system design. In this paper, a direct tip–tilt and piston error detection technique based on model-based phase retrieval with multiple defocused… read more here.
Keywords: error; tilt piston; detection approach; tip tilt ... See more keywords