Digital holographic high-speed 3D imaging for the vibrometry of fast-occurring phenomena.

ABSTRACT: Digital holography allows production of high-speed three-dimensional images at rates over 100,000 frames per second; however, simultaneously obtaining suitable performance and levels of accuracy using digital holography is difficult. This problem prevents high-speed three-dimensional imaging from being used for vibrometry. In this paper, we propose and test a digital holography method that can produce vibration measurements. The method is based on single-shot phase-shifting interferometry. Herein, we imaged the surface of a loudspeaker diaphragm and measured its displacement due to the vibrations produced by a frequency sweep signal. We then analyzed the frequency of the experimental data and confirmed that the frequency spectra inferred from the reconstructed images agreed well with the s

SUBMITTER: Kakue T 

PROVIDER: S-EPMC5585211 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature