Low-frequency harmonic vibration analysis with double-pulsed addition electronic speckle pattern interferometry

Andrew John Moore; Carlos Perez-Lopez

doi:10.1117/1.600869

1 September 1996 Low-frequency harmonic vibration analysis with double-pulsed addition electronic speckle pattern interferometry

Andrew John Moore, Carlos Perez-Lopez

Author Affiliations +

Optical Engineering, Vol. 35, Issue 9, (September 1996). https://doi.org/10.1117/1.600869

We describe the control of a pulsed laser for measuring harmonic vibrations with double-pulsed addition electronic speckle pattern interferometry (ESPI). The basic requirement is to synchronize the laser pulses both to a known position of the object vibration cycle (to obtain a stationary fringe pattern) and to a charge coupled device (CCD) camera (to obtain one double pulse per field.) It is shown theoretically and experimentally that at low object-vibration frequencies (typically < 500 Hz) these synchronization requirements can cause instabilities in the laser output. A synchronization scheme to overcome these problems is described and experimental results presented at several low objectvibration frequencies. Addition fringe visibility is improved in real-time with an electronic filter.

Citation Download Citation

Andrew John Moore and Carlos Perez-Lopez "Low-frequency harmonic vibration analysis with double-pulsed addition electronic speckle pattern interferometry," Optical Engineering 35(9), (1 September 1996). https://doi.org/10.1117/1.600869

Published: 1 September 1996

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE