Results 51 to 60 of about 2,848,759 (416)
Remote Sensing, 2022 Although the performance of unmanned aerial vehicle (UAV) tracking has benefited from the successful application of discriminative correlation filters (DCF) and convolutional neural networks (CNNs), UAV tracking under occlusion and deformation remains a ...
Yashuo Bai +8 more
doaj +1 more source
A Super-resolution Optical Classifier with High Photon Efficiency [PDF]
, 2020 We propose and demonstrate a photon-efficient optical classifier to overcome the Rayleigh limit in spatial resolution. It utilizes mode-selective sum frequency generation and single-pixel photon detection to resolve closely spaced incoherent sources based on photon counting statistics.
arxiv +1 more source
Enhancing Stellar Spectroscopy with Extreme Adaptive Optics and Photonics [PDF]
, 2016 Extreme adaptive optics (AO) systems are now in operation across the globe. These systems, capable of high order wavefront correction, deliver Strehl ratios of ∼ 90 % in the near-infrared.
N. Jovanovic +4 more
semanticscholar +1 more source
, 2013 Spring 2014 News and notes from the University of Dayton Electro-Optics Graduate Program.https://ecommons.udayton.edu/eop_newsletter/1005/thumbnail ...
University of Dayton. Electro-Optics and Photonics Program
core +4 more sources
Two Practical Methods to Retrieve Aerosol Optical Properties from Coherent Doppler Lidar
Remote Sensing, 2022 Complexly distributed aerosol particles have significant impacts on climate and environmental changes. As one of the vital atmospheric power sources, the wind field deeply affects the distribution and transport of aerosol particles.
Yinchao Zhang +8 more
doaj +1 more source
Photon discerner: Adaptive quantum optical sensing near the shot noise limit [PDF]
arXiv, 2023 Photon statistics of an optical field can be used for quantum optical sensing in low light level scenarios free of bulky optical components. However, photon-number-resolving detection to unravel the photon statistics is challenging. Here, we propose a novel detection approach, that we call `photon discerning', which uses adaptive photon thresholding ...
arxiv
Photon Statistics in Adaptive Optics
Optics and Photonics News, 1999 ABSTRACT Random aberrations due to atmospheric turbulence determine the angular resolution of ground-based telescopes. Adaptive optics systems compensate the wavefront degradation before detection. Although systems with a large number of subapertures in the wavefront sensor and of actuators in the deformable mirror provide the best results, they are ...
Manuel P. Cagigal, Vidal F. Canales
openaire +3 more sources
Optomechanical measurement of photon spin angular momentum and optical torque in integrated photonic devices [PDF]
, 2016 Photons carry linear momentum, and spin angular momentum when circularly or elliptically polarized. During light-matter interaction, transfer of linear momentum leads to optical forces, while angular momentum transfer induces optical torque. Optical forces including radiation pressure and gradient forces have long been utilized in optical tweezers and ...
arxiv +1 more source
Achromatic linear polarization rotators by tandem twisted nematic liquid crystal cells
Scientific Reports, 2018 An achromatic linear polarization rotator based on a tandem-2ϕ-twisted nematic liquid crystal cell (tandem-2ϕ-TNLC cell, where 2ϕ represents the total twisted angle) is theoretically analyzed and experimentally demonstrated.
Te-Yuan Chung +4 more
doaj +1 more source
Spatial-Coded Phosphor Coating for High-Efficiency White LEDs
IEEE Photonics Journal, 2017 In this paper, a new structure of spatial-coded coating phosphor is proposed and effectively benefits the efficiency enhancement in the white light-emitting diodes (LEDs). The spatial-coded phosphor plate contains two subregions.
Ching-Cherng Sun +7 more
doaj +1 more source