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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 4 — Feb. 15, 2014
  • pp: 830–833

Laser differential confocal paraboloidal vertex radius measurement

Jiamiao Yang, Lirong Qiu, Weiqian Zhao, Yang Shen, and Hongwei Jiang  »View Author Affiliations


Optics Letters, Vol. 39, Issue 4, pp. 830-833 (2014)
http://dx.doi.org/10.1364/OL.39.000830


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Abstract

This Letter proposes a laser differential confocal paraboloidal vertex radius measurement (DCPRM) method for the high-accuracy measurement of the paraboloidal vertex radius of curvature. DCPRM constructs an autocollimation vertex radius measurement light path for the paraboloid by placing a reflector in the incidence light path. This technique is based on the principle that a paraboloid can aim a parallel beam at its focus without aberration and uses differential confocal positioning technology to identify the paraboloid focus and vertex accurately. Measurement of the precise distance between these two positions is achieved to determine the paraboloid vertex radius. Preliminary experimental results indicate that DCPRM has a relative expanded uncertainty of less than 0.001%.

© 2014 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(180.1790) Microscopy : Confocal microscopy
(220.1250) Optical design and fabrication : Aspherics
(220.4840) Optical design and fabrication : Testing

ToC Category:
Optical Design and Fabrication

History
Original Manuscript: July 25, 2013
Revised Manuscript: December 5, 2013
Manuscript Accepted: January 6, 2014
Published: February 6, 2014

Citation
Jiamiao Yang, Lirong Qiu, Weiqian Zhao, Yang Shen, and Hongwei Jiang, "Laser differential confocal paraboloidal vertex radius measurement," Opt. Lett. 39, 830-833 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-4-830


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