Novel techniques for the efficient reduction of data generated by charge-coupled device detectors

Welch, S. J.; Welch, S.J
November 2000
Review of Scientific Instruments;Nov2000, Vol. 71 Issue 11
Academic Journal
With the increasingly widespread employment of charge-coupled devices as detectors, there is much interest in methods of processing the data which they produce. Taking the reflection grating spectrometer instrument on the European Space Agency's recently launched X-ray MultiMirror Mission spacecraft as an example, some novel techniques for removing unwanted data are explored. Entirely independent of compression techniques which may be employed elsewhere in the same system, deletion of unwanted data as close as possible to the source can be desirable to save subsequent processor time, or communications bandwidth--both quantities that are typically in short supply in the spacecraft case. This article sets out the general case for choosing to remove unwanted pixel data close to the source, considers the implications of this on the overall quantity of data, and then examines some methods for reducing the data volume. © 2000 American Institute of Physics.


Related Articles

  • A fast charge coupled device detector for charge exchange recombination spectroscopy on the... Thomas, D.M.; Burrell, K.H.; Groebner, R.J.; Gohil, P.; Kaplan, D.; Makariou, C.; Seraydarian, R.P. // Review of Scientific Instruments;Feb1997, Vol. 68 Issue 2, p1233 

    Presents a fast charge coupled detector (CCD) for charge exchange recombination (CER) spectroscopy on the DIII-D tokamak. Use of CER to determine spatially and temporally resolved ion temperature; Quantum efficiency of CCD; Improvement of data quality for measurements in the divertor-relevant...

  • How Optical Advances Helped Deliver the Promise of Miniature Spectrometers. Morris, Robert // Spectroscopy;Jan2010, Vol. 25 Issue 1, p30 

    The article discusses the aid of optical advances in delivering the promise of miniature spectrometers. It mentions that the continuous improvement of improving the optical components of the spectrometers have lessened the performance gaps of the earliest miniature spectrometers. It states that...

  • Magnetic resonance–coupled fluorescence tomography scanner for molecular imaging of tissue. Davis, Scott C.; Pogue, Brian W.; Springett, Roger; Leussler, Christoph; Mazurkewitz, Peter; Tuttle, Stephen B.; Gibbs-Strauss, Summer L.; Jiang, Shudong S.; Dehghani, Hamid; Paulsen, Keith D. // Review of Scientific Instruments;Jun2008, Vol. 79 Issue 6, p064302 

    A multichannel spectrally resolved optical tomography system to image molecular targets in small animals from within a clinical MRI is described. Long source/detector fibers operate in contact mode and couple light from the tissue surface in the magnet bore to 16 spectrometers, each containing...

  • Instrumentation for video-rate near-infrared diffuse optical tomography. Daqing Piao; Dehghani, Hamid; Shudong Jiang; Srinivasan, Subhadra; Pogue, Brian W. // Review of Scientific Instruments;Dec2005, Vol. 76 Issue 12, p124301 

    This article describes the design, rationale, and system performance of a rapid imaging near-infrared diffuse optical tomography system that is capable of collecting tomographic measurements at video rate. Data-acquisition speed of 35 frames/s is achieved by spectral encoding of the sources,...

  • High resolution soft x-ray spectroscopy of low Z K-shell emission from laser-produced plasmas. Dunn, J.; Magee, E. W.; Shepherd, R.; Chen, H.; Hansen, S. B.; Moon, S. J.; Brown, G. V.; Gu, M.-F.; Beiersdorfer, P.; Purvis, M. A. // Review of Scientific Instruments;Oct2008, Vol. 79 Issue 10, p10E314 

    A large radius, R=44.3 m, high resolution grating spectrometer (HRGS) with 2400 lines/mm variable line spacing has been designed for laser-produced plasma experiments conducted at the Lawrence Livermore National Laboratory Jupiter Laser Facility. The instrument has been run with a low-noise,...

  • Calibration of an imaging crystal spectrometer for low x-ray energies. Lee, S. G.; Bak, J. G.; Bitter, M. // Review of Scientific Instruments;Jan2008, Vol. 79 Issue 1, p013501 

    An x-ray imaging crystal spectrometer was designed for the Hanbit magnetic mirror device to observe spectra of heliumlike neon at 13.4474 Ã…. The spectrometer consists of a spherically bent mica crystal and an x-ray sensitive vacuum charge coupled device camera. This spectrometer can provide...

  • New model ultra-soft X-ray spectrometer for microanalysis. Fukushima, Sei; Kimura, Takashi; Ogiwara, Toshiya; Tsukamoto, Kazunori; Tazawa, Toyohiko; Tanuma, Shigeo // Microchimica Acta;Jun2008, Vol. 161 Issue 3/4, p399 

    The authors developed a new general-purpose analytical apparatus that includes a high-resolution ultra-soft X-ray spectrometer, which notably can be used to efficiently measure the ultra-soft X-ray spectrum over the 30–150 eV range. Over this energy range, the analysis of ultra-light...

  • Radial profile measurement of impurity line emissions using space-resolved 3 m vacuum ultraviolet spectrometer in LHD. Katai, Ryuji; Morita, Shigeru; Goto, Motoshi // Review of Scientific Instruments;Oct2006, Vol. 77 Issue 10, p10F307 

    A space-resolved 3 m vacuum ultraviolet (vuv) spectrometer has been developed to measure a radial (vertical) profile of impurity line emissions in the Large Helical Device (LHD). The system consists of a 3 m normal incidence spectrometer equipped with a space-resolved slit and a back-illuminated...

  • High-energy x-ray backlighter spectrum measurements using calibrated image plates. Maddox, B. R.; Park, H. S.; Remington, B. A.; Izumi, N.; Chen, S.; Chen, C.; Kimminau, G.; Ali, Z.; Haugh, M. J.; Ma, Q. // Review of Scientific Instruments;Feb2011, Vol. 82 Issue 2, p023111 

    The x-ray spectrum between 18 and 88 keV generated by a petawatt laser driven x-ray backlighter target was measured using a 12-channel differential filter pair spectrometer. The spectrometer consists of a series of filter pairs on a Ta mask coupled with an x-ray sensitive image plate. A...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics