Two-Dimensional Optical Far Field Power Measurements Of High Angular Resolution And/Or High Dynamic Range

1986 ◽  
Author(s):  
Hartwig Richter
Keyword(s):  
Angular Resolution ◽  
Dynamic Range ◽  
High Dynamic Range ◽  
High Angular Resolution ◽  
Far Field ◽  
Two Dimensional ◽  
High Dynamic ◽  
Power Measurements

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.

Towards a microchannel-based X-ray detector with two-dimensional spatial and time resolution and high dynamic range

2015 ◽  
Vol 22 (5) ◽  
pp. 1202-1206 ◽  
Author(s):  
Bernhard W. Adams ◽  
Anil U. Mane ◽  
Jeffrey W. Elam ◽  
Razib Obaid ◽  
Matthew Wetstein ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Time Resolution ◽  
Dynamic Range ◽  
High Dynamic Range ◽  
High Time Resolution ◽  
Two Dimensional ◽  
X Ray ◽  
High Dynamic ◽  
Time Gating ◽  
Better Than

X-ray detectors that combine two-dimensional spatial resolution with a high time resolution are needed in numerous applications of synchrotron radiation. Most detectors with this combination of capabilities are based on semiconductor technology and are therefore limited in size. Furthermore, the time resolution is often realised through rapid time-gating of the acquisition, followed by a slower readout. Here, a detector technology is realised based on relatively inexpensive microchannel plates that uses GHz waveform sampling for a millimeter-scale spatial resolution and better than 100 ps time resolution. The technology is capable of continuous streaming of time- and location-tagged events at rates greater than 107events per cm2. Time-gating can be used for improved dynamic range.

TWO-DIMENSIONAL COLOUR APPEARANCE SCALES FOR COLOUR STIMULI HAVING HIGH DYNAMIC RANGE

2021 ◽  
Author(s):  
Lv Xi ◽  
Luo Ming Ronnier
Keyword(s):  
Dynamic Range ◽  
High Dynamic Range ◽  
Quality Enhancement ◽  
Two Dimensional ◽  
Wide Dynamic Range ◽  
Daily Experience ◽  
Image Quality Enhancement ◽  
High Dynamic ◽  
Colour Appearance ◽  
Recent Extension

New colour appearance scales close to daily experience and image quality enhancement are highly desired including whiteness, blackness, vividness and depth. This article describes a new experiment to accumulate the data under HDR (high dynamic range) conditions. The data were then used to test the performance of different colour appearance scales such as CIELAB and CAM16-UCS plus the recent extension by Berns’ Vab*, Dab*. The results showed those Berns’ scales gave reasonable performance. However, there was no scale capable of predicting colour appearance data covering a wide dynamic range. New scales were developed based on the absolute scales of brightness and colourfulness of CAM16-UCS and gave accurate prediction to the data.

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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