Results 21 to 30 of about 5,015,013 (196)
Fast High-Resolution Phase Diversity Wavefront Sensing with L-BFGS Algorithm
Sensors, 2023 The presence of manufacture error in large mirrors introduces high-order aberrations, which can severely influence the intensity distribution of point spread function.
Haoyuan Zhang +6 more
doaj +1 more source
Optical Activation of TrkA Signaling [PDF]
ACS Synthetic Biology, 2018 Abstract Nerve growth factor/tropomyosin receptor kinase A (NGF/TrkA) signaling plays a key role in neuronal development, function, survival, and growth. The pathway is implicated in neurodegenerative disorders including Alzheimer’s disease, chronic pain, inflammation, and cancer. NGF binds the extracellular domain of
Liting Duan +7 more
openaire +3 more sources
In-Situ Metrology of Large Segmented Detector Based on Modified Optical Truss
IEEE Photonics Journal, 2023 To precisely map cosmic structures and capture time-domain events, future large survey telescopes will be equipped with segmented detectors that greatly expand their field of view. Segment flatness and assembly accuracy will be essential for them to make
Qichang An +6 more
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Frontiers in Optics and Photonics, 2020 Optical 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.
G. Guidetti, Yu Wang, F. Omenetto
semanticscholar +1 more source
Active Optics—Advances of Cycloid-like Variable Curvature Mirrors for the VLTI Array
Photonics, 2022 Elasticity theory and active optics led us to the discovery of three geometrical configurations of variable curvature mirrors (VCMs) that are either cycloid-like or tulip-like thickness distributions. Cycloid-like VCMs are generated by a uniform load—air
Gerard Rene Lemaitre +5 more
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Active Support System for the Correction of a 4m SiC Primary Mirror Based on the Bending Mode
Applied Sciences, 2023 Active optics is a key technology in ground-based large-aperture telescopes. The active correction of the surface shape of the primary mirror is used to reduce the surface shape error and improve the imaging quality.
Zhiyuan Yu, Xiaoxia Wu, Fuguo Wang
doaj +1 more source
Micromachines, 2023 An active optical system with three segmented mirrors was proposed to verify the co-focus and co-phase progress. In this system, a kind of large-stroke and high-precision parallel positioning platform was specially developed to help support the mirrors ...
Zihao Yin +6 more
doaj +1 more source
IEEE Access, 2020 In the co-phasing techniques applied to the segmented telescope, a Shack-Hartmann wavefront sensor cannot accurately detect the piston error of the segment. Although the phase diversity (PD) algorithm can detect the piston error of each segment, it fails
Haifeng Cao +4 more
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Advances in Meta-Optics and Metasurfaces: Fundamentals and Applications
Nanomaterials, 2023 Meta-optics based on metasurfaces that interact strongly with light has been an active area of research in recent years. The development of meta-optics has always been driven by human’s pursuits of the ultimate miniaturization of optical elements, on ...
Kai Ou +9 more
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The Development and Progression of Micro-Nano Optics
Frontiers in Chemistry, 2022 Micro-Nano optics is one of the most active frontiers in the current development of optics. It combines the cutting-edge achievements of photonics and nanotechnology, which can realize many brand-new functions on the basis of local electromagnetic ...
Yong Wang +32 more
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