Results 1 to 10 of about 4,473,282 (253)
Deep Learning Correction Algorithm for The Active Optics System [PDF]
Sensors, 2020 The correction of wavefront aberration plays a vital role in active optics. The traditional correction algorithms based on the deformation of the mirror cannot effectively deal with disturbances in the real system.
Wenxiang Li +6 more
doaj +5 more sources
Shape Control of a Unimorph Deformable Mirror for Space Active Optics under Uncertainties [PDF]
Micromachines, 2023 This paper focuses on the change of morphing capabilities for a unimorph deformable mirror impacted by environmental factors, which works in space for active optics applications.
Kainan Wang, Yian Yu, André Preumont
doaj +3 more sources
Point-to-point stabilized optical frequency transfer with active optics [PDF]
Nature Communications, 2021 Atomic clocks and their networks are useful tools for optical communications and frequency metrology. Here the authors use phase stabilization and active tip-tilt to suppress atmospheric effects and enable optical frequency transfer through free-space.
Benjamin P. Dix-Matthews +10 more
doaj +4 more sources
Optical Design and Active Optics Methods in Astronomy [PDF]
Optical Review, 2013 Optical designs for astronomy involve implementation of active optics and adaptive optics from X-ray to the infrared. Developments and results of active optics methods for telescopes, spectrographs and coronagraph planet finders are presented. The high accuracy and remarkable smoothness of surfaces generated by active optics methods also allow ...
G. Lemaitre
arxiv +7 more sources
Active Optics in Astronomy: Freeform Mirror for the MESSIER Telescope Proposal [PDF]
Mathematical and Computational Applications, 2018 Active optics techniques in astronomy provide high imaging quality. This paper is dedicated to highly deformable active optics that can generate non-axisymmetric aspheric surfaces—or freeform surfaces—by use of a minimum number of actuators ...
Gerard Rene Lemaitre +2 more
doaj +2 more sources
Nanophotonics, 2020 AbstractOptical devices have been traditionally fabricated using materials whose chemical and physical properties are finely tuned to perform a specific, single, and often static function, whereby devices’ variability is achieved by design changes. Due to the integration of optical systems in multifunctional platforms, there is an increasing need for ...
Fiorenzo G. Omenetto +2 more
openaire +3 more sources
Last results of MADRAS, a space active optics demonstrator [PDF]
International Conference on Space Optics, 2017 The goal of the MADRAS project (Mirror Active, Deformable and Regulated for Applications in Space) is to highlight the interest of Active Optics for the next generation of space telescope and instrumentation.
Arnaud Liotard +7 more
openalex +2 more sources
Laser-heating-based active optics for synchrotron radiation applications [PDF]
Optics Letters, 2016 Active optics has attracted considerable interest from researchers in synchrotron radiation facilities because of its capacity for x-ray wavefront correction.
Fugui Yang +5 more
openalex +3 more sources
Grouting slurry diffusion range based on active heating fiber optics monitoring [PDF]
Scientific Reports, 2022 To quantify the diffusion range of slurry in grouting engineering, an active heating optical fiber (AHFO) monitoring method is proposed. The AHFO is arranged on the coal seam floor.
Lei Zhu +3 more
doaj +2 more sources
Active optics for high-dynamic variable curvature mirrors [PDF]
Optics Letters, 2009 Variable curvature mirrors of large amplitude are designed by using finite element analysis. The specific case studied reaches at least a 800 mum sag with an optical quality better than lambda/5 over a 120 mm clear aperture.
Emmanuel Hugot +7 more
openalex +3 more sources