4.6 Article

High-speed nanometer-resolved imaging vibrometer and velocimeter

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APPLIED PHYSICS LETTERS
卷 98, 期 10, 页码 -

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AMER INST PHYSICS
DOI: 10.1063/1.3563707

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  1. DARPA MTO

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Conventional laser vibrometers are incapable of performing multidimensional vibrometry at high speeds because they build on single-point measurements and rely on beam scanning, significantly limiting their utility and precision. Here we introduce a laser vibrometer that performs high-speed multidimensional imaging-based vibration and velocity measurements with nanometer-scale axial resolution without the need for beam scanning. As a proof-of-concept, we demonstrate real-time microscopic imaging of acoustic vibrations with 1 nm axial resolution, 1200 image pixels, and 30 ps dwell time at 36.7 MHz scan rate. (C) 2011 American Institute of Physics. [doi:10.1063/1.3563707]

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