High-speed nanometer-resolved imaging vibrometer and velocimeter
Abstract
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.
- Publication:
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Applied Physics Letters
- Pub Date:
- March 2011
- DOI:
- Bibcode:
- 2011ApPhL..98j1107M
- Keywords:
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- high-speed techniques;
- laser velocimeters;
- vibration measurement;
- 07.10.-h;
- 06.60.Jn;
- 06.30.Gv;
- Mechanical instruments and equipment;
- High-speed techniques;
- Velocity acceleration and rotation