Beyond the frame rate: Measuring high-frequency fluctuations with light intensity modulation

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dc.creatorWong, Wesley Philip
dc.creatorHalvorsen, Ken
dc.date2008-08-11
dc.date2009-01-27
dc.date.accessioned2026-07-07T12:39:09Z
dc.date.available2026-07-07T12:39:09Z
dc.descriptionPower spectral density measurements of any sampled signal are typically restricted by both acquisition rate and frequency response limitations of instruments, which can be particularly prohibitive for video-based measurements. We have developed a new method called Intensity Modulation Spectral Analysis (IMSA) that circumvents these limitations, dramatically extending the effective detection bandwidth. We demonstrate this by video-tracking an optically-trapped microsphere while oscillating an LED illumination source. This approach allows us to quantify fluctuations of the microsphere at frequencies over 10 times higher than the Nyquist frequency, mimicking a significantly higher frame rate.
dc.description4 pages, 2 figures
dc.identifierhttps://arxiv.org/abs/0808.1563
dc.identifierhttp://arxiv.org/abs/0808.1563
dc.identifierOpt.Lett.34:277-279,2009
dc.identifierdoi:10.1364/OL.34.000277
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/219006
dc.subjectBiological Physics
dc.subjectData Analysis, Statistics and Probability
dc.subjectInstrumentation and Detectors
dc.titleBeyond the frame rate: Measuring high-frequency fluctuations with light intensity modulation
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