FSI Combined With Heterodyne Interferometer for Non-Cooperative Targets Distance Measurement

Lu, Cheng; Zhao, Xu; Liu, Guodong; Liu, Bingguo; Lu, Binghui

doi:10.1109/lpt.2021.3138342

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…A critical challenge in utilizing intrasweep OCT for highfrequency ultrasound measurement will be ensuring sufficient spacing between OCT samples to prevent intermodulation noise generation. While more complex algorithms proposed in the literature, such as Kalman filters or Wigner transforms, might offer better performance in the presence of intermodulation noise, complete elimination of such noise is unlikely [10][11][12] .…”

Section: Resultsmentioning

confidence: 99%

Applications and challenges for isolation of ultrasound signals from swept source optical coherent tomography

Mitchell,

Farazmand,

Mattison

2024

Photons Plus Ultrasound: Imaging and Sensing 2024

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Ultrasound is a powerful tool for performing cross sectional imaging. Non-contact detection of ultrasound via light is important when physical coupling to the sample is precluded by sample sensitivity and has applications in metrology and medical imaging. Optical coherence tomography provides similar structural information to ultrasound, typically with higher resolution and lower penetration depths. The phase sensitivity of optical coherence tomography lends itself well to detection of acoustic waves. Furthermore, swept source optical coherence tomography has demonstrated sensitivity to megahertz frequency acoustic waves by monitoring changes in optical pathlength as a function of wavelength during the sweep. Recent advances in swept source laser technology have improved the ability to detect and isolate ultrasound acoustic signals. Swept source optical coherence tomography has ultimate sensitivity to acoustic waves defined by the shot-noise limit of the imaging system and can achieve theoretical sensitivities as low as ~10 pm from ultrasonic waves from an ideal reflector. Measurement of ultrasound via optical coherence tomography is complicated by tissue dispersion, signal crosstalk between imaging depths, non-ideal tissue reflectors, and laser stability. Here, we present and compare methods for extracting ultrasound signals from OCT datasets based on techniques for demodulation of frequency modulated signals. The overall sensitivity, signal to noise ratio, and signal isolation are compared between methods of quadrature demodulation, Hilbert transform based signal extraction, and phase locked loops, and future directions of this technology are discussed.

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Section: Resultsmentioning

confidence: 99%

Applications and challenges for isolation of ultrasound signals from swept source optical coherent tomography

Mitchell,

Farazmand,

Mattison

2024

Photons Plus Ultrasound: Imaging and Sensing 2024

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Frequency-scanning interferometry for dynamic measurement using adaptive Sage-Husa Kalman filter

Wang

Liu

Tian

et al. 2023

Optics and Lasers in Engineering

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Method of high-precision free-space distance measurement for noncooperative targets

Hou¹,

Kang²,

Yue³

et al. 2023

J. Opt. Soc. Am. A

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Aimed at high-precision distance measurement for noncooperative targets in free space, a spatial distance measurement method is proposed. Based on the concept of optical carrier-based microwave interferometry, this method extracts distance information from the radiofrequency domain. The interference model of broadband light beams is established, and the optical interference can be eliminated by using a broadband light source. A spatial optical system with a Cassegrain telescope as the main body is designed to effectively receive the backscattered signal without cooperative targets. A free-space distance measurement system is built to verify the feasibility of the proposed method, and the results agree well with the set distances. Long-distance measurements with a resolution of 0.033 µm can be achieved, and the errors of the ranging experiments are within 0.1 µm. The proposed method has the advantages of fast processing speed, high measurement accuracy, and high immunity to disturbances as well as the potential for measurement of other physical quantities.

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FSI Combined With Heterodyne Interferometer for Non-Cooperative Targets Distance Measurement

Cited by 3 publications

References 15 publications

Applications and challenges for isolation of ultrasound signals from swept source optical coherent tomography

Applications and challenges for isolation of ultrasound signals from swept source optical coherent tomography

Frequency-scanning interferometry for dynamic measurement using adaptive Sage-Husa Kalman filter

Method of high-precision free-space distance measurement for noncooperative targets

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