|
Title:
|
Spatially encoded multibeam laser Doppler vibrometry using a single photodetector.
|
|
Author:
|
Fu, Yu.; Guo, Min.; Phua, Poh Boon.
|
|
Copyright year:
|
2010 |
|
Abstract:
|
A laser Doppler vibrometer with single photodetector is introduced to measure the vibration on multiple
points of target simultaneously. A 2 5 beam array with various frequency shifts is generated by three
acousto-optic devices, illuminating different points on a vibrating object. The reflected beams interfere with
a reference beam on a high-speed photodetector, and the signal is amplified and digitized with a rate of
500 megasamples/s. To extract vibration information of different points, the carrier frequencies of each
beam are elaborately designed so that they can be separated from cross-talk regions in the spectrum. The
experimental results are compared with that from a commercial single-point vibrometer, and the comparison
shows that it is possible to do a precise measurement on multiple points simultaneously using a single
photodetector. |
|
Subject:
|
DRNTU::Science::Physics::Optics and light. |
|
Type:
|
Journal Article |
|
Series/ Journal Title:
|
Optics letters |
|
Research Centre:
|
Temasek Laboratories |
|
Rights:
|
This paper was published in [Optics Letters] and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: [http://www.opticsinfobase.org/abstract.cfm?URI=ol-35-9-1356]. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. |
|
Version:
|
Published version |
