Browsing by Author "Nobes, David S."

Browsing by Author "Nobes, David S."

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  • Acousto-optic frequency switching for single-camera planar Doppler velocimetry 
    Ford, Helen D.; Nobes, David S.; Tatam, Ralph P. (International Society for Optical Engineering; 1999, 2001-12-31)
    A single-camera Planar Doppler velocimetry system has been demonstrated, in which illumination beams at two closely-spaced optical frequencies are derived from a single Argon-ion laser. The frequency of one beam lies on ...
  • Determination of view vectors from image warping mapping functions 
    Nobes, David S.; Wieneke, B.; Tatam, Ralph P. (Spie -- the Int Soc for Optical Engineering, 2004-02-28)
    The measurands of several reported laser-based measurement techniques are sensitive to both the propagation direction of the laser and the viewing direction from the region of interest to the detector. For such ...
  • Dual Illumination Planar Doppler Velocimetry using a Single Camera 
    Charrett, Thomas O. H.; Ford, Helen D.; Nobes, David S.; Tatam, Ralph P. (International Society for Optical Engineering; 1999, 2003-12-31)
    A Planar Doppler Velocimetry (PDV) illumination system has been designed which is able to generate two beams, separated in frequency by about 600 MHz. This allows a common-path imaging head to be constructed, using a ...
  • Instantaneous, three-component planar Doppler velocimetry using imaging fibre bundles 
    Nobes, David S.; Ford, Helen D.; Tatam, Ralph P. (Springer Science Business Media, 2004-01-01)
    Abstract This paper describes a planar Doppler velocimetry (PDV) technique that is capable of measuring the three, instantaneous and time average components of velocity over two spatial dimensions using a single pair of ...
  • Investigation into the selection of viewing configurations for three-component planar Doppler velocimetry measurements. 
    Charrett, Thomas O. H.; Nobes, David S.; Tatam, Ralph P. (Osa Optical Society of America, 2007-07-01)
    A method for the calculation of three orthogonal velocity components in planar Doppler velocimetry (PDV) using four or more measured velocity components (to the three typically used) is presented. The advantages and ...
  • Planar Doppler velocimetry measurements of flows using imaging fibre bundles 
    Nobes, David S.; Ford, Helen D.; Tatam, Ralph P. (SPIE - International Society for Optics and Photonics, 2003-08-03)
    The development of a planar Doppler velocimetry is described. The technique is capable of measuring the three, instantaneous components of velocity in two dimensions using a single pair of signal and reference cameras. ...