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Proceedings Paper

Single-pixel carrier-based approach for full-field laser interferometry using a CMOS-DSP camera
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Paper Abstract

This investigation describes the implementation of a Single Pixel Carrier Based Demodulation (SPCBD) approach on a digital CMOS-DSP camera for full-field heterodyne interferometry. A full-field vibration measurement system is presented as an alternative to a classical scanning Laser Doppler Vibrometer (LDV). The Heterodyne set-up, CMOS-DSP camera and the signal demodulation techniques adopted are described. Characterisation tests that describe the basic performance of the CMOS-DSP camera, in terms of acquisition rates and time response are presented. A simple experiment was performed to demonstrate the novel laser vibrometry system that consisted of determining the displacement of a point on the surface of a vibrating mirror. The measured velocity and displacement data were compared to the output from a commercial LDV. The integration of a CMOS sensor, DSP and a laser-doppler interferometer has lead to the development of a fully digital “functional” machine vision system that provides a flexible, compact and inexpensive tool for automated high-precision optical measurements.

Paper Details

Date Published: 19 February 2004
PDF: 9 pages
Proc. SPIE 5251, Detectors and Associated Signal Processing, (19 February 2004); doi: 10.1117/12.532651
Show Author Affiliations
Mauro V. Aguanno, Univ. of Limerick (Ireland) and European Commision Joint Research Ctr. (Italy)
Institute for Health and Consumer Protection (Italy)
Fereydoun Lakestani, European Commision Joint Research Ctr. (Italy)
Maurice Patrick Whelan, European Commision Joint Research Ctr. (Italy)
Michael J. Connelly, Univ. of Limerick (Ireland)

Published in SPIE Proceedings Vol. 5251:
Detectors and Associated Signal Processing
Jean-Pierre Chatard; Peter N. J. Dennis, Editor(s)

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