Thickness measurement of transparent plates by a self-mixing interferometer
Optics Letters, Vol. 35, Issue 11, pp. 1844-1846 (2010)
http://dx.doi.org/10.1364/OL.35.001844
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Abstract
We introduce a technique to measure transparent glass slab thickness. It employs a very simple setup combining two interferometers: a forward-going beam scheme and a self-mixing readout of the beam reflected back to the laser source. Interestingly, the difference of the two readouts provides a quantity related to thickness measurement, irrespective of refractive index. We demonstrate this method using samples on a range of thickness from 30 to
© 2010 Optical Society of America
OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.3180) Instrumentation, measurement, and metrology : Interferometry
ToC Category:
Instrumentation, Measurement, and Metrology
History
Original Manuscript: March 3, 2010
Revised Manuscript: April 22, 2010
Manuscript Accepted: April 26, 2010
Published: May 24, 2010
Citation
Mohammad Taghi Fathi and Silvano Donati, "Thickness measurement of transparent plates by a self-mixing interferometer," Opt. Lett. 35, 1844-1846 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-11-1844
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