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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 18, Iss. 22 — Nov. 15, 1993
  • pp: 1899–1901

Two-color light-emitting-diode source for high-precision phase-shifting interferometry

L. Deck and F. Demarest  »View Author Affiliations


Optics Letters, Vol. 18, Issue 22, pp. 1899-1901 (1993)
http://dx.doi.org/10.1364/OL.18.001899


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Abstract

We describe a two-color light-emitting-diode source that provides intense, uniform, and highly stable illumination with a wavelength precision sufficient for multiwavelength phase-shifting interferometry applications. The source has feedback-stabilized intensity and junction temperature sensing for wavelength compensation. It has a theoretical mean time between failure of more than 30,000 h, and the two colors provide a step measurement capability of greater than 2.5 μm. Measurements made with this source in an interferometric microscope show subangstrom repeatability.

© 1993 Optical Society of America

History
Original Manuscript: July 22, 1993
Published: November 15, 1993

Citation
L. Deck and F. Demarest, "Two-color light-emitting-diode source for high-precision phase-shifting interferometry," Opt. Lett. 18, 1899-1901 (1993)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-18-22-1899

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