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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 33 — Nov. 20, 2010
  • pp: 6552–6557

Thickness measurement of transparent glass plates using a lateral shearing cyclic path optical configuration setup and polarization phase shifting interferometry

Y. Pavan Kumar and Sanjib Chatterjee  »View Author Affiliations


Applied Optics, Vol. 49, Issue 33, pp. 6552-6557 (2010)
http://dx.doi.org/10.1364/AO.49.006552


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Abstract

We present a measurement technique to determine the thickness of a transparent glass plate (GP) by using a lateral shearing cyclic path optical configuration (CPOC) setup and polarization phase shifting interferometry (PPSI). In the technique, the GP introduces a longitudinal shift in the focus of the beam and, as a result, a spherical wavefront emerges from the lens, which is otherwise set for producing a collimated beam. Using CPOC, two laterally sheared orthogonally polarized beams are generated from the incident spherical wavefront. By applying PPSI, the slope of the optical path difference variation between the laterally sheared interfering beams is evaluated, and the radius of the spherical wavefront and the longitudinal shift of the beam focus are calculated. The thickness of the GP is determined from the standard relation between the longitudinal shift of the focus introduced by the GP and the thickness of the GP. Results obtained for a GP of 9.810 mm thickness are presented.

© 2010 Optical Society of America

OCIS Codes
(080.3630) Geometric optics : Lenses
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.1680) Instrumentation, measurement, and metrology : Collimation
(120.3180) Instrumentation, measurement, and metrology : Interferometry

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: June 18, 2010
Revised Manuscript: September 21, 2010
Manuscript Accepted: October 19, 2010
Published: November 19, 2010

Citation
Y. Pavan Kumar and Sanjib Chatterjee, "Thickness measurement of transparent glass plates using a lateral shearing cyclic path optical configuration setup and polarization phase shifting interferometry," Appl. Opt. 49, 6552-6557 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-33-6552

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