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Applied Optics

Applied Optics


  • Vol. 38, Iss. 34 — Dec. 1, 1999
  • pp: 7076–7079

Scanning delay line with a rotating-parallelogram prism for low-coherence interferometry

Linas Giniūnas, Romualdas Danielius, and Remigijus Karkockas  »View Author Affiliations

Applied Optics, Vol. 38, Issue 34, pp. 7076-7079 (1999)

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We describe a fast scanning optical delay line for low-coherence interferometry that has good linearity, a high duty cycle, and a continuously adjustable scan range. The delay line consists of a rotating-parallelogram prism with the rotation axis tilted with respect to the incident beam and two motionless mirrors. The delay line is well suited for nearly simultaneous distance measurements at two different depths, which is useful for making absolute and differential distance measurements.

© 1999 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(110.4500) Imaging systems : Optical coherence tomography
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5800) Instrumentation, measurement, and metrology : Scanners
(150.6910) Machine vision : Three-dimensional sensing
(170.4500) Medical optics and biotechnology : Optical coherence tomography

Original Manuscript: May 27, 1999
Published: December 1, 1999

Linas Giniūnas, Romualdas Danielius, and Remigijus Karkockas, "Scanning delay line with a rotating-parallelogram prism for low-coherence interferometry," Appl. Opt. 38, 7076-7079 (1999)

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