Zobrazeno 1 - 9
of 9
pro vyhledávání: '"W. D. Koek"'
Publikováno v:
Measurement Science and Technology, 17 (2)
In digital holographic particle image velocimetry, the particle image depth-of-focus and the inaccuracy of the measured particle position along the optical axis are relatively large in comparison to the characteristic transverse dimension of the reco
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79d066ab32f914a19b6f0ff9e61c8c84
https://doi.org/10.1088/0957-0233/17/2/011
https://doi.org/10.1088/0957-0233/17/2/011
Autor:
Joseph J. M. Braat, Donald H. Barnhart, V. S. S. Chan, Nandini Bhattacharya, Jerry Westerweel, W. D. Koek
Publikováno v:
Measurement Science and Technology. 15:647-655
This paper demonstrates the use of bacteriorhodopsin (bR) as the holographic recording medium for a holographic particle image velocimetry (HPIV) system. Using an off-axis hologram in bR, double-exposed images of particles in a turbulent flow are rec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3893f53e0a285e8465f685c6783035cc
https://doi.org/10.1088/0957-0233/15/4/006
https://doi.org/10.1088/0957-0233/15/4/006
Autor:
Donald H. Barnhart, Norbert Hampp, W. D. Koek, Jeremy M. Coupland, Thorsten Juchem, Neil A. Halliwell
Publikováno v:
Measurement Science and Technology. 15:639-646
Recent trends in optical metrology suggest that, in order for holographic measurement to become a widespread tool, it must be based on methods that do not require physical development of the hologram. While digital holography has been successfully de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::53366081a436804aa050e7f9cecba626
https://doi.org/10.1088/0957-0233/15/4/005
https://doi.org/10.1088/0957-0233/15/4/005
Autor:
Joseph J. M. Braat, Nandini Bhattacharya, Jerry Westerweel, W. D. Koek, Thomas Ooms, Victor Chan
Publikováno v:
Topics in Applied Physics ISBN: 9783540735274
We present a holographic particle image velocimetry system that uses a reusable holographic material as the recording medium. The measurement system records double-exposure holograms in a film containing the photochromic protein bacteriorhodopsin (BR
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8cf39cea12e31da44a69f346d6415ee6
https://doi.org/10.1007/978-3-540-73528-1_9
https://doi.org/10.1007/978-3-540-73528-1_9
Publikováno v:
Measurement Science and Technology, 19 (7)
In a typical digital holographic PIV recording set-up, the reference beam and the object beam propagate towards the recording device along parallel axes. Consequently, in a reconstructed volume, the real image of the recorded particle field and the s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c411aa2397a5cef3c2316d4367b32c34
http://resolver.tudelft.nl/uuid:cf3891f1-fb97-4a13-b4f0-6901b6cb2edb
http://resolver.tudelft.nl/uuid:cf3891f1-fb97-4a13-b4f0-6901b6cb2edb
Publikováno v:
Proceedings of SPIE, 2005 vol. 5742
We present a novel holographic particle image velocimetry (HPIV) system using a reversible holographic material as the recording medium. In HPIV the three-dimensional flow field throughout a volume is detected by adding small tracer particles to a no
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe4760c652153f8ccdd26bb3bb721664
https://doi.org/10.1117/12.588531
https://doi.org/10.1117/12.588531
Publikováno v:
Optics letters. 29(1)
Bacteriorhodopsin (bR) is a reversible photochromic protein that can be used as a holographic medium. The dichroic absorption of the bR molecule is polarization dependent, thereby allowing for the recording of polarization holograms. The properties o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::32bcbedcac1f3ad3635a0d579c588219
https://pubmed.ncbi.nlm.nih.gov/14719674
https://pubmed.ncbi.nlm.nih.gov/14719674
Autor:
Nandini Bhattacharya, Jerry Westerweel, Victor S. S. Chan, W. D. Koek, Norbert Hampp, Donald H. Barnhart, Thorsten Juchem, Joseph J. M. Braat
Publikováno v:
SPIE Proceedings.
When large amounts of data are stored in Bacteriorhodopsin (bR), for example with Holographic Particle Image Velocimetry (HPIV), the volatile nature of the medium can be a serious problem. The loss of information has two causes; thermal erasure and p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cdd13785097c598f058c69b425cd8aca
https://doi.org/10.1117/12.505623
https://doi.org/10.1117/12.505623
Publikováno v:
Optics Express, 13 (7), 2005
Delft University of Technology
Delft University of Technology
A theoretical analysis describing the dependence of the signal-tonoise ratio (SNR) on the number of pixels and the number of particles is presented for in-line digital particle holography. The validity of the theory is verified by means of numerical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3008313b0ebc5d846e00301533f20331
https://doi.org/10.1364/opex.13.002578
https://doi.org/10.1364/opex.13.002578