1. Ralph P. Tatam

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    1. Mentioned In 9 Articles

    2. Metre-per-second microfluidic flow velocimetry with dual beam optical coherence tomography

      Metre-per-second microfluidic flow velocimetry with dual beam optical coherence tomography
      A novel dual beam Optical Coherence Tomography (OCT) instrument has been developed for high velocity flow measurement, principally in microfluidics applications. The scanned dual beam approach creates a pair of image-frames separated by a small spatiotemporal offset. Metre-per-second flow measurement is achieved by rapid re-imaging by the second beam allowing for particle tracking between each image-frame of the pair. Flow at 1.06 m/s using a single optical access ...
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    3. Application of optical coherence tomography to non-destructively characterise rind breakdown disorder of ‘Nules Clementine’ mandarins

      Application of optical coherence tomography to non-destructively characterise rind breakdown disorder of ‘Nules Clementine’ mandarins
      ...lo Magwaza^a^, ^d, * Helen D. Ford^b, * Paul J.R. Cronje^c, * Umezuruike Linus Opara^a, * Sandra Landahl^d, * Ralph P. Tatam^b, * Leon A. Terry^d^, Corresponding author contact information Corresponding author contact in...
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    4. Feature Of The Week 2/10/13: Cranfield University Researchers Investigate Using OCT For Adhesive Cure Monitoring

      Feature Of The Week 2/10/13: Cranfield University Researchers Investigate Using OCT For Adhesive Cure Monitoring
      Monitoring the progress of cure in an adhesive enables changes in behaviour to be studied under differing conditions of temperature, humidity or illumination, and allows the importance of other factors, such as variability between production batches, volume of adhesive or altered composition due to aging, to be assessed. Detailed knowledge of the cure process minimises the time that must be allowed before further processing. For exothermic reactions, it is possible ...
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    5. Spatially-resolved volume monitoring of adhesive cure using correlated-image optical coherence tomography

      Spatially-resolved volume monitoring of adhesive cure using correlated-image optical coherence tomography
      Cross-correlation of optical coherence tomography (OCT 1 ) images has been applied to internal imaging of PVA and two-part epoxy adhesives during cure, providing information on relative viscosity at different positions within the sample volume. Spatial resolution of a few micrometres is obtained in the original OCT images, and a few tens of micrometres in the correlation images, enabling the progress of cure to be mapped in fine detail within a ...
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    6. Optical Coherence Tomography Used $500M of Federally Funded Research Over The Past Decade: How was it Used, What was Accomplished, and What’s to Come?

      Optical Coherence Tomography Used $500M of Federally Funded Research Over The Past Decade: How was it Used, What was Accomplished, and What’s to Come?
      The field of optical coherence tomography (OCT) has blossomed dramatically since some of the first work by various researchers around the world in the late 1980s and early 1990s. Since then there have been dozens of companies created, hundreds of research groups working on OCT, thousands of research articles published, millions of patients scanned with OCT, hundreds of millions of venture capital and corporate R&D dollars invested, hundreds of ...
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    7. Imaging fibre bundles for Fizeau-based optical coherence tomography

      An OCT system incorporating a coherent fibre imaging bundle is described. Fibres are accessed sequentially by a beam focused onto the input face of the bundle, allowing 2D or 3D images to be acquired using point detection. A Fizeau interferometer configuration is used, in which light from the distal end of a fibre in the bundle (forming the reference arm) mixes with light reflected by the sample itself (forming the ...
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  2. About Ralph P. Tatam

    Ralph P. Tatam

    Ralph P. Tatam PhD, DSc, CEng, FInstP , FSPIE, has been active in the area of optical and optical fibre instrumentation research since 1985. He is a member of the SPIE, the International Society for Optics and Photonics, Board of Directors and is the European Regional Editor of the international journal Measurement Science and Technology and served on the Board of five other international journals . He has served on technical programme committees for numerous international conferences, and was Chair for the SPIE Optical Metrology symposium, in 2005 and 2007 and is member of the Technical Programme Committee for the international conference series Optical Fibre Sensors (OFS). Ralph has been a member of the Engineering and Physical Sciences Research Council (EPSRC) College of Peers continuously since its inception and he is a project monitor for the Technology Strategy Board, reviews and Chairs prioritisation panels for the EPSRC, reviews for the BBSRC, the Royal Society and for a number of international organisations. He has over 400 publications and has supervised/co-supervised more than 50 PhD students. He won the National Measurement Awards Frontier Science and Measurement category in 2001 and November 2004 for his work on Planar Doppler Velocimetry and Nanostructured Films on Optical Fibres, respectively.