OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 41, Iss. 19 — Jul. 1, 2002
  • pp: 3906–3910

Sinusoidal-wavelength-scanning interferometer with double feedback control for real-time distance measurement

Osami Sasaki, Kazuhiro Akiyama, and Takamasa Suzuki  »View Author Affiliations


Applied Optics, Vol. 41, Issue 19, pp. 3906-3910 (2002)
http://dx.doi.org/10.1364/AO.41.003906


View Full Text Article

Enhanced HTML    Acrobat PDF (102 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

In addition to a conventional phase α the interference signal of a sinusoidal-wavelength-scanning interferometer has a phase-modulation amplitude Z b that is proportional to the optical path difference L and amplitude b of the wavelength scan. L and b are controlled by a double feedback system so that the phase α and the amplitude Z b are kept at 3π/2 and π, respectively. The voltage applied to a device that displaces a reference mirror to change the optical path difference becomes a ruler with scales smaller than a wavelength. Voltage applied to a device that determines the amplitude of the wavelength scan becomes a ruler marking every wavelength. These two rulers enable one to measure an absolute distance longer than a wavelength in real time.

© 2002 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(120.5060) Instrumentation, measurement, and metrology : Phase modulation

History
Original Manuscript: October 31, 2001
Revised Manuscript: February 28, 2002
Published: July 1, 2002

Citation
Osami Sasaki, Kazuhiro Akiyama, and Takamasa Suzuki, "Sinusoidal-wavelength-scanning interferometer with double feedback control for real-time distance measurement," Appl. Opt. 41, 3906-3910 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-19-3906


Sort:  Author  |  Year  |  Journal  |  Reset  

References

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited