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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 4 — Feb. 1, 2009
  • pp: 730–736

Technique for the focal-length measurement of positive lenses using Fizeau interferometry

Yeddanapudi Pavan Kumar and Sanjib Chatterjee  »View Author Affiliations


Applied Optics, Vol. 48, Issue 4, pp. 730-736 (2009)
http://dx.doi.org/10.1364/AO.48.000730


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Abstract

We present what we believe is a new technique for the focal-length measurement of positive lenses using Fizeau interferometery. The technique utilizes the Gaussian lens equation. The image distance is measured interferometrically in terms of the radius of curvature of the image-forming wavefront emerging from the lens. The radii of curvature of the image-forming wavefronts corresponding to two different axial object positions of known separation are measured. The focal length of the lens is determined by solving the equations obtained using the Gaussian lens equation for the two object positions. Results obtained for a corrected doublet lens of a nominal focal length of 200.0 mm with a measurement uncertainty of ± 2.5 % is presented.

© 2009 Optical Society of America

OCIS Codes
(080.0080) Geometric optics : Geometric optics
(080.3630) Geometric optics : Lenses
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(260.0260) Physical optics : Physical optics
(260.3160) Physical optics : Interference

History
Original Manuscript: September 15, 2008
Revised Manuscript: December 12, 2008
Manuscript Accepted: December 12, 2008
Published: January 23, 2009

Citation
Yeddanapudi Pavan Kumar and Sanjib Chatterjee, "Technique for the focal-length measurement of positive lenses using Fizeau interferometry," Appl. Opt. 48, 730-736 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-4-730

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