scholarly journals JWST near infrared detectors: latest test results

2009 ◽  
Author(s):  
Erin C. Smith ◽  
Bernard J. Rauscher ◽  
David Alexander ◽  
Brian L. Clemons ◽  
Chuck Engler ◽  
...  
Keyword(s):  
Infrared Detectors ◽  
Near Infrared ◽  
Test Results

High in content InGaAs near-infrared detectors: growth, structural design and photovoltaic properties

2017 ◽  
Vol 123 (4) ◽  
Author(s):  
Zhiwei Zhang ◽  
Guoqing Miao ◽  
Hang Song ◽  
Dabing Li ◽  
Hong Jiang ◽  
...  
Keyword(s):  
Structural Design ◽  
Infrared Detectors ◽  
Near Infrared ◽  
Photovoltaic Properties

Near-Infrared Detectors

2005 ◽  
pp. 7.3-731-7.3-750
Author(s):  
Lorenzo Colace ◽  
Gaetano Assanto ◽  
Gianlorenzo Masini
Keyword(s):  
Infrared Detectors ◽  
Near Infrared

Near infrared detectors based on HgSe and HgCdSe quantum dots generated at the liquid–liquid interface

2013 ◽  
Vol 1 (39) ◽  
pp. 6184 ◽  
Author(s):  
Manoj K. Jana ◽  
P. Chithaiah ◽  
Banavoth Murali ◽  
S. B. Krupanidhi ◽  
Kanishka Biswas ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Infrared Detectors ◽  
Near Infrared ◽  
Liquid Interface

JWST’s near infrared spectrograph status and first OTIS test results

2018 ◽  
Author(s):  
Ralf Ehrenwinkler ◽  
Peter Mosner ◽  
Hermann Karl ◽  
Martin Altenburg ◽  
Marc Maschmann ◽  
...  
Keyword(s):  
Near Infrared ◽  
Test Results

scholarly journals Brighter-fatter Effect in Near-infrared Detectors—III. Fourier-domain Treatment of Flat Field Correlations and Application to WFIRST

2020 ◽  
Vol 132 (1013) ◽  
pp. 074504 ◽  
Author(s):  
Jenna K. C. Freudenburg ◽  
Jahmour J. Givans ◽  
Ami Choi ◽  
Christopher M. Hirata ◽  
Chris Bennett ◽  
...  
Keyword(s):  
Infrared Detectors ◽  
Near Infrared ◽  
Fourier Domain ◽  
Flat Field

scholarly journals Self-Filtering Monochromatic Infrared Detectors Based on Bi2Se3 (Sb2Te3)/Silicon Heterojunctions

Nanomaterials ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1771
Author(s):  
Xujie Pan ◽  
Jing He ◽  
Lei Gao ◽  
Handong Li
Keyword(s):  
Response Time ◽  
Infrared Detectors ◽  
Near Infrared ◽  
Nir Light ◽  
Photoelectric Properties ◽  
Detection Response ◽  
Silicon Heterojunctions ◽  
Surface Modified ◽  
High Pass ◽  
Back Illuminated

This paper focuses on the photoelectric properties of heterostructures formed by surface-modified Si (111) and hexagonal, quintuple-layered selenides (Bi2Se3 and Sb2Te3). It was shown that H-passivated Si (111) can form robust Schottky junctions with either Bi2Se3 or Sb2Te3. When back illuminated (i.e., light incident towards the Si side of the junction), both the Bi2Se3/Si and Sb2Te3/Si junctions exhibited significant photovoltaic response at 1030 nm, which is right within the near-infrared (NIR) light wavelength range. A maximum external quantum efficiency of 14.7% with a detection response time of 2 ms for Bi2Se3/Si junction, and of 15.5% with a 0.8 ms response time for the Sb2Te3/Si junction, were achieved. Therefore, utilizing Si constituents as high-pass filters, the Bi2Se3 (Sb2Te3)/Si heterojunctions can serve as monochromatic NIR photodetectors.

scholarly journals Cavity Ring-Down Methane Sensor for Small Unmanned Aerial Systems

Sensors ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 454 ◽  
Author(s):  
Benjamin Martinez ◽  
Thomas W. Miller ◽  
Azer P. Yalin
Keyword(s):  
Near Infrared ◽  
High Sensitivity ◽  
Unmanned Aerial Systems ◽  
Test Results ◽  
Methane Sensor ◽  
Open Path ◽  
Low Mass ◽  
Aerial Systems ◽  
High Finesse ◽  
Cavity Ring Down

We present the development, integration, and testing of an open-path cavity ring-down spectroscopy (CRDS) methane sensor for deployment on small unmanned aerial systems (sUAS). The open-path configuration used here (without pump or flow-cell) enables a low mass (4 kg) and low power (12 W) instrument that can be readily integrated to sUAS, defined here as having all-up mass of <25 kg. The instrument uses a compact telecom style laser at 1651 nm (near-infrared) and a linear 2-mirror high-finesse cavity. We show test results of flying the sensor on a DJI Matrice 600 hexacopter sUAS. The high sensitivity of the CRDS method allows sensitive methane detection with a precision of ~10–30 ppb demonstrated for actual flight conditions. A controlled release setup, where known mass flows are delivered, was used to simulate point-source methane emissions. Examples of methane plume detection from flight tests suggest that isolated plumes from sources with a mass flow as low as ~0.005 g/s can be detected. The sUAS sensor should have utility for emissions monitoring and quantification from natural gas infrastructure. To the best of our knowledge, it is also the first CRDS sensor directly deployed onboard an sUAS.

Surface Defects Detection of Red Jujube Based on Near-Infrared Vision System

2013 ◽  
Vol 303-306 ◽  
pp. 573-577
Author(s):  
Min Xu ◽  
Yue Ma ◽  
Shuai Chen
Keyword(s):  
Machine Vision ◽  
Near Infrared ◽  
Surface Defects ◽  
Vision System ◽  
Infrared Image ◽  
Machine Vision System ◽  
Test Results ◽  
Quality Factors ◽  
Important Quality ◽  
Infrared Vision

Quality evaluation of agricultural and food products is important for processing, inventory control, and marketing. Fruit surface defects are important quality factors for the jujube industry, especially for high quality jujubes such as Xinjiang red jujube. This paper presents the development and test results of a machine vision system for automatic jujube surface defects detection. Unlike other near-infrared spectrometric approaches, the developed machine vision system uses reflective near-infrared image to evaluate jujube quality by analyzing two-dimensional images. Near-infrared image, vision algorithms and a variety of operational details of the system, including cameras, optics, illumination, and fruit carrier are presented. The complete machine vision system has been built, and the experimental results show that the designed machine vision system is feasible to detect the defects of jujubes.

scholarly journals Measurement of Reciprocity Failure in Near-Infrared Detectors

2011 ◽  
Vol 123 (900) ◽  
pp. 179-186 ◽  
Author(s):  
T. Biesiadzinski ◽  
W. Lorenzon ◽  
R. Newman ◽  
M. Schubnell ◽  
G. Tarlé ◽  
...  
Keyword(s):  
Infrared Detectors ◽  
Near Infrared ◽  
Reciprocity Failure
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