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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 11 — Jun. 1, 2010
  • pp: 1844–1846

Thickness measurement of transparent plates by a self-mixing interferometer

Mohammad Taghi Fathi and Silvano Donati  »View Author Affiliations

Optics Letters, Vol. 35, Issue 11, pp. 1844-1846 (2010)

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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 1000 μm .

© 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

Original Manuscript: March 3, 2010
Revised Manuscript: April 22, 2010
Manuscript Accepted: April 26, 2010
Published: May 24, 2010

Mohammad Taghi Fathi and Silvano Donati, "Thickness measurement of transparent plates by a self-mixing interferometer," Opt. Lett. 35, 1844-1846 (2010)

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