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 megasampless. 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.

© 2010 Optical Society of America

Full Article  |  PDF Article
Related Articles
Bending vibration measurement on rotors by laser vibrometry

Toby Miles, Margaret Lucas, and Steve Rothberg
Opt. Lett. 21(4) 296-298 (1996)

Multipoint laser vibrometer for modal analysis

William N. MacPherson, Mark Reeves, David P. Towers, Andrew J. Moore, Julian D. C. Jones, Martin Dale, and Craig Edwards
Appl. Opt. 46(16) 3126-3132 (2007)

Multipoint laser Doppler vibrometry using holographic optical elements and a CMOS digital camera

Michael J. Connelly, Przemyslaw M. Szecówka, Raghavendra Jallapuram, Suzanne Martin, Vincent Toal, and Maurice P. Whelan
Opt. Lett. 33(4) 330-332 (2008)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (1)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription