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White-light interferometric spectral analysis for displacement sensing

Podoleanu, Adrian Gh. and Taplin, Stephen R. and Webb, David J. and Jackson, David A. (1994) White-light interferometric spectral analysis for displacement sensing. In: DePaula, Ramon P., ed. Fiber Optic and Laser Sensors XI. Proceedings of SPIE . SPIE, pp. 92-102. ISBN 0-8194-1335-6. (doi:10.1117/12.169894) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1117/12.169894

Abstract

Channeled spectrum of an optical beam generated by a diode laser below threshold after traversing a two-beam interferometer is spectrally analyzed using a grating and a CCD linear array. The paper focuses attention to the Michelson interferometer for displacement sensing. Some particularities and results are presented for the case when the same technique has been applied for determining the widths of parallel sheets of transparent materials or the index of refraction of some liquids. With the present technique, displacement in the range 20 micrometers to 3.5 mm and index of refraction for some liquids were measured with less than 1% error. An analysis of the experimental error sources is made which shows that the ultimate accuracy may be considerably increased.

Item Type: Book section
DOI/Identification number: 10.1117/12.169894
Additional information: Document Type: Proceedings Paper
Uncontrolled keywords: charge-coupled devices; signal processing; interferometers; liquids; sensors; diffraction gratings; refraction
Subjects: Q Science > QC Physics
T Technology > TA Engineering (General). Civil engineering (General) > TA165 Engineering instruments, meters etc. Industrial instrumentation
Divisions: Faculties > Sciences > School of Physical Sciences > Applied Optics Group
Depositing User: O.O. Odanye
Date Deposited: 16 Jun 2009 02:30 UTC
Last Modified: 26 Jan 2020 04:02 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/19949 (The current URI for this page, for reference purposes)
Podoleanu, Adrian Gh.: https://orcid.org/0000-0002-4899-9656
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