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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 15 — May. 20, 2012
  • pp: 3071–3080

Ronchi test with equivalent wavelength

Anmi García-Arellano, Fermín Granados-Agustín, Manuel Campos-García, and Alejandro Cornejo-Rodríguez  »View Author Affiliations


Applied Optics, Vol. 51, Issue 15, pp. 3071-3080 (2012)
http://dx.doi.org/10.1364/AO.51.003071


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Abstract

In this work we present an experimental proposal to evaluate optical surfaces with high slopes or with infrared wavelengths based on the Ronchi test as well as on the concept of equivalent wavelength. A spatial modulator is used in the implementation of the Ronchi test, and a white LED with different color filters is employed in order to generate different wavelengths. Two Ronchigrams with incoherent light, each one for a different color, are registered and computationally processed, thus generating a third one with an equivalent wavelength. The results obtained show that it is possible to generate patterns with traditional rulings and substructured sequences of Katyl. Additionally, we discuss some of the limitations of employing different rulings. Finally, we found that appropriate image enhancing algorithms allow us to improve the visibility of the resulting fringes and thus obtain a better analysis.

© 2012 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(220.0220) Optical design and fabrication : Optical design and fabrication

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: October 7, 2011
Revised Manuscript: March 24, 2012
Manuscript Accepted: March 24, 2012
Published: May 18, 2012

Citation
Anmi García-Arellano, Fermín Granados-Agustín, Manuel Campos-García, and Alejandro Cornejo-Rodríguez, "Ronchi test with equivalent wavelength," Appl. Opt. 51, 3071-3080 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-15-3071


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