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Optics Letters

Optics Letters


  • Editor: Anthony J Campillo
  • Vol. 32, Iss. 7 — Apr. 1, 2007
  • pp: 859–861

Piezospectroscopic imaging with a tunable Fabry–Perot filter and Tikhonov reconstruction

Bauke Heeg and John B. Abbiss  »View Author Affiliations

Optics Letters, Vol. 32, Issue 7, pp. 859-861 (2007)

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By combining two well-established techniques—multispectral imaging with a tunable filter and regularized data inversion—a fast and accurate method for measuring, at each pixel of a CCD array, the spectrum emitted by a radiating object is obtained. The method is demonstrated with ruby R 1 - and R 2 -line fluorescence, using a narrowband tilt-tunable Fabry–Perot interference filter for data acquisition. Since the data inversion problem is badly ill conditioned, regularization is essential to obtain meaningful results. The reconstruction is capable of a peak wavelength accuracy of 0.01 nm , sufficient to measure the small wavelength shifts encountered in rubylike materials due to changes in the local crystal lattice stress. Thus, the technique presents a novel approach to piezospectroscopic imaging and offers 2 to 3 orders of magnitude faster mapping of local stress than current techniques.

© 2007 Optical Society of America

OCIS Codes
(100.1830) Image processing : Deconvolution
(110.4190) Imaging systems : Multiple imaging
(170.6280) Medical optics and biotechnology : Spectroscopy, fluorescence and luminescence
(300.6320) Spectroscopy : Spectroscopy, high-resolution

ToC Category:

Original Manuscript: September 18, 2006
Revised Manuscript: December 5, 2006
Manuscript Accepted: December 28, 2006
Published: March 5, 2007

Bauke Heeg and John B. Abbiss, "Piezospectroscopic imaging with a tunable Fabry-Perot filter and Tikhonov reconstruction," Opt. Lett. 32, 859-861 (2007)

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