Abstract
We describe a high-speed digital speckle pattern interferometer incorporating a line-scan camera and a waveguide phase modulator for the measurement of complex deformation (vibration phase and amplitude) at audio acoustic frequencies. Experimental data show continuous phase-stepped recovery of out-of-plane surface deformation in one dimension, obtained at 100 kHz with 2p/20-rad (0.02-µm) displacement resolution, for surface velocities of 3.2 mm s-1. © 2000 Optical Society of America.
Original language | English |
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Pages (from-to) | 1068-1070 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 25 |
Issue number | 15 |
Publication status | Published - 1 Aug 2000 |