| Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 8, 2013
|
|
|---|---|---|
| Article Number | 13035 | |
| Number of page(s) | 4 | |
| DOI | https://doi.org/10.2971/jeos.2013.13035 | |
| Published online | 30 May 2013 | |
Regular papers
Short-time Fourier transform laser Doppler holography
Institut Langevin. Centre National de la Recherche Scientifique (CNRS) UMR 7587, Institut National de la Santé et de la Recherche Médicale (INSERM) U 979, Université Pierre et Marie Curie (UPMC), Université Paris Diderot. École Supérieure de Physique et de Chimie Industrielles - 1 rue Jussieu. 75005 Paris. France
Received:
19
December
2012
Revised:
29
April
2013
We report a demonstration of laser Doppler holography at a sustained acquisition rate of 250 Hz on a 1 Megapixel complementary metal-oxide-semiconductor (CMOS) sensor array and image display at 10 Hz frame rate. The holograms are optically acquired in off-axis configuration, with a frequency-shifted reference beam. Wide-field imaging of optical fluctuations in a 250 Hz frequency band is achieved by turning time-domain samplings to the dual domain via short-time temporal Fourier transformation. The measurement band can be positioned freely within the low radio-frequency (RF) spectrum by tuning the frequency of the reference beam in real-time. Video-rate image rendering is achieved by streamline image processing with commodity computer graphics hardware. This experimental scheme is validated by a non-contact vibrometry experiment.
Key words: Laser Doppler / vibrometry / holography / GPU
© The Author(s) 2013. All rights reserved.
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