Results 51 to 60 of about 1,840,836 (218)

MTF measurement of a SWIR imaging telescope using star test images

AIP Conference Proceedings, 2012
MTF is the final and decisive parameter determining the image quality of optical imaging systems. To measure the MTF of a large-mirror telescope in a laboratory, an expensive collimator is necessary to make a collimated beam from a point or knife-edge source. Star-test is an old and traditional method giving some clues about wavefront error.
Yilmaz, Ozgur, Selimoglu, Ozgur
openaire   +2 more sources

Multispectral Short Wave Infrared Plenoptic Imaging System Free of Fixed Pattern Noise

IEEE Access
We propose a single-camera multispectral Short Wave Infrared (SWIR) plenoptic imaging system free of fixed pattern noise (FPN). The developed system can form, for each scene’s object of interest, an in-focus noiseless 24 channels SWIR ...
Joaquin Lermanda-Sandoval, Sergio N. Torres, Guillermo Machuca, Jonathan Torres-Sanhueza, Pablo A. Coelho   +4 more
doaj   +1 more source

SNR modeling for ground-based daytime imaging of GEO-satellites in the SWIR

, 2019
This research outlines the expected performance and limitations of a ground-based shortwave infrared (SWIR) sensor in performance of the daytime geosynchronous satellite (GEO) custody mission with a generalized signal-to-noise ratio (SNR) approach model.
Fiorino, Steven T., Thomas, Grant, Hawks, Michael R., Cobb, Richard G.   +3 more
core   +1 more source

Wide-Dynamic-Range Lead-Free SWIR Image Sensors Based on InAs Thin-Film Quantum-Dot Photodiodes ^†

Sensors
This work presents a monolithically integrated short-wavelength infrared (SWIR) image sensor based on indium arsenide (InAs) quantum dot photodiodes (QDPDs).
Myonglae Chu, Wenya Song, Joo Hyoung Kim, Tristan Weydts, Vladimir Pejovic, Jiwon Lee, Minhyun Jin, Sang Yeon Lee, Yoora Seo, Hyunyoung Yoo, Jonas Bentell, Abu Bakar Siddik, Isabel Pintor Monroy, Marina Vildanova, Arman Uz Zaman, Tae Jin Yoo, Antonia Malainou, Wagdy Hussein, Annachiara Spagnolo, Gauri Karve, Itai Lieberman, Stefano Guerrieri, Pawel E. Malinowski   +22 more
doaj   +1 more source

Near‐Unity Photothermal Conversion in Bimetallic M44 and M81 Nanoclusters Enables NIR‐Driven Photo‐Thermo‐Electricity Generation

Advanced Science, EarlyView.
Atomically precise nanoclusters of Au/Ag alloys are explored as high‐performance photothermal materials, delivering record‐high photothermal efficiencies (up to 91%). Photo‐thermo‐electricity is further demonstrated by integrating nanocluster films with thermoelectric devices.
Avirup Sardar, Abhrojyoti Mazumder, Weijie Ji, Guiying He, Yitong Wang, Lianshun Luo, Sihan Chen, Rongchao Jin   +7 more
wiley   +1 more source

Leveraging Big Multitemporal Multisource Satellite Data and Artificial Intelligence for the Detection of Complex and Invisible Features: The Case of Extensive Irrigation Mapping

Archaeological Prospection, EarlyView.
ABSTRACT The detection of buried or obscured archaeological features remains a central challenge in landscape archaeology, particularly in the irrigated floodplains of Mesopotamia where levees and canals formed the basis of complex agrarian systems. This study presents a deep learning–based approach for the large‐scale, automated detection of ancient ...
Nazarij Buławka, Hector A. Orengo, Felipe Lumbreras Ruiz, Iban Berganzo‐Besga, Ekta Gupta   +4 more
wiley   +1 more source

Combined analysis of visible-near infrared (VNIR), shortwave infrared (SWIR), and longwave infrared (LWIR) imaging spectrometer data [PDF]

, 2015
VNIR, SWIR, and LWIR imaging spectrometer data are typically analyzed using individual spectral ranges. Integrating modalities to extract complimentary information allows improved characterization and mapping that cannot be accomplished using a single ...
Kruse, Fred A., McDowell, Meryl L., Meryl L. McDowell, Fred A. Kruse, Cone, Shelly R., Shelly R. Cone   +5 more
core   +3 more sources

Soil Suborder Discrimination Using Machine Learning Is Improved by SWIR Imaging Compared with Full VIS–NIR–SWIR Spectra

Remote Sensing
Rapid, standardised discrimination of soil taxonomic units remains challenging when relying solely on conventional field descriptions and laboratory analyses, particularly at high sampling densities. This study evaluated whether proximal spectroscopy and
Daiane de Fatima da Silva Haubert, Nicole Ghinzelli Vedana, Weslei Augusto Mendonça, Karym Mayara de Oliveira, Caio Almeida de Oliveira, João Vitor Ferreira Gonçalves, José Alexandre M. Demattê, Roney Berti de Oliveira, Amanda Silveira Reis, Renan Falcioni, Marcos Rafael Nanni   +10 more
doaj   +1 more source

All‐in‐One Intelligent Hemostatic Sponge: Rapid Hemostasis for Non‐Compressive Wounds With Synergetic Enhanced Antibacterial Efficacy and Self‐Reporting Biodegradation

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Clinicians often concurrently tackle critical challenges including emergency hemorrhage, secondary infection, and the elusive tracking of biodegradation of conventional hemostatic agents for complex wounds. Here, we report an intelligent hemostatic sponge (spCS@AIE) by incorporating aggregation‐induced emission (AIE) nanoparticles with short‐wave ...
Zhicheng Liu, Yan Zhang, Mengmeng Wang, Ye Li, Heng Sun, Lanqiong Zhang, Xin Bai, Haicheng Wei, Zhi Wang, Hao Guan, Yanzi Xu, Dongfeng Dang, Lingjie Meng   +12 more
wiley   +1 more source

Investigation of InGaAsSb-based heterojunction photodiodes for extended SWIR imaging

, 2023
The detection in short wavelength infrared (SWIR) band, ranging from 1-3 μm, provides a wide range of applications in earth observation, plastics recycling, biology and hyperspectral imaging, gas analysis and defense.
Müller, Raphael, Rehm, Robert, Rutz, Frank, Daumer, Volker, Wörl, Andreas, Niemasz, Jasmin   +5 more
core   +1 more source