scholarly journals Sub-Airy disk angular resolution with high dynamic range in the near-infrared

2011 ◽  
Vol 16 ◽  
pp. 03002
Author(s):  
A. Richichi
Keyword(s):  
Near Infrared ◽  
Angular Resolution ◽  
Dynamic Range ◽  
High Dynamic Range ◽  
High Dynamic ◽  
Airy Disk

scholarly journals Thermal Imaging Metrology Using High Dynamic Range Near-Infrared Photovoltaic-Mode Camera

Sensors ◽  
2021 ◽  
Vol 21 (18) ◽  
pp. 6151
Author(s):  
Thomas B. O. Rockett ◽  
Nicholas A. Boone ◽  
Robert D. Richards ◽  
Jon R. Willmott
Keyword(s):  
Measurement Uncertainty ◽  
Wide Temperature Range ◽  
Thermal Imaging ◽  
Near Infrared ◽  
Dynamic Range ◽  
High Dynamic Range ◽  
Thermal Camera ◽  
Temperature Range ◽  
Photovoltaic Mode ◽  
High Dynamic

The measurement of a wide temperature range in a scene requires hardware capable of high dynamic range imaging. We describe a novel near-infrared thermal imaging system operating at a wavelength of 940 nm based on a commercial photovoltaic mode high dynamic range camera and analyse its measurement uncertainty. The system is capable of measuring over an unprecedently wide temperature range; however, this comes at the cost of a reduced temperature resolution and increased uncertainty compared to a conventional CMOS camera operating in photodetective mode. Despite this, the photovoltaic mode thermal camera has an acceptable level of uncertainty for most thermal imaging applications with an NETD of 4–12 °C and a combined measurement uncertainty of approximately 1% K if a low pixel clock is used. We discuss the various sources of uncertainty and how they might be minimised to further improve the performance of the thermal camera. The thermal camera is a good choice for imaging low frame rate applications that have a wide inter-scene temperature range.

scholarly journals Space VLBI

2001 ◽  
Vol 205 ◽  
pp. 422-427
Author(s):  
H. Hirabayashi
Keyword(s):  
International Collaboration ◽  
Angular Resolution ◽  
Dynamic Range ◽  
High Dynamic Range ◽  
High Angular Resolution ◽  
High Dynamic Range Imaging ◽  
Range Imaging ◽  
High Dynamic

Space VLBI enables high angular resolution and high dynamic range imaging through an extension of ground-based VLBI. The TDRSS space VLBI experiments in the 1980s were followed by the first space VLBI imaging mission, VSOP, in the 1990s. The new century holds the promise of the VSOP-2 and ARISE missions, which aim for more sensitive, higher angular resolution and higher observing frequency capabilities. These missions will enable AGNs to be viewed much more clearly and will make broader science areas, including lower brightness sources, accessible. It is noted that in all space VLBI missions, international collaboration in global sense plays an important role.

Near-infrared transillumination with high dynamic range imaging for occlusal caries detection in vitro

2020 ◽  
Vol 35 (9) ◽  
pp. 2049-2058
Author(s):  
Friederike Litzenburger ◽  
Alexander Lederer ◽  
Maximilian Kollmuß ◽  
Reinhard Hickel ◽  
Karl-Heinz Kunzelmann ◽  
...  
Keyword(s):  
Near Infrared ◽  
Dynamic Range ◽  
High Dynamic Range ◽  
Caries Detection ◽  
High Dynamic Range Imaging ◽  
Range Imaging ◽  
Occlusal Caries ◽  
Occlusal Caries Detection ◽  
High Dynamic

scholarly journals The Canadian Galactic Plane Survey

1998 ◽  
Vol 15 (1) ◽  
pp. 56-59 ◽  
Author(s):  
J. English ◽  
A. R. Taylor ◽  
J. A. Irwin ◽  
S. M. Dougherty ◽  
S. Basu ◽  
...  
Keyword(s):  
Interstellar Medium ◽  
Angular Resolution ◽  
Galactic Plane ◽  
Dynamic Range ◽  
High Dynamic Range ◽  
Molecular Gas ◽  
The Galaxy ◽  
High Dynamic ◽  
Multi Phase ◽  
Better Than

AbstractThe Dominion Radio Astrophysical Observatory (DRAO) is carrying out a survey as part of an international collaboration to image the northe, at a common resolution, in emission from all major constituents of the interstellar medium; the neutral atomic gas, the molecular gas, the ionised gas, dust and relativistic plasma. For many of these constituents the angular resolution of the images (1 arcmin) will be more than a factor of 10 better than any previous studies. The aim is to produce a publicly-available database of high resolution, high-dynamic range images of the Galaxy for multi-phase studies of the physical states and processes in the interstellar medium. We will sketch the main scientific motivations as well as describe some preliminary results from the Canadian Galactic Plane Survey/Releve Canadien du Plan Galactique (CGPS/RCPG).

High-dynamic-range interferometric bragg-cell spectrum analyser

1986 ◽  
Vol 133 (1) ◽  
pp. 26
Author(s):  
J. Mellis ◽  
G.R. Adams ◽  
K.D. Ward
Keyword(s):  
Dynamic Range ◽  
High Dynamic Range ◽  
Spectrum Analyser ◽  
High Dynamic
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