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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 6 — Feb. 20, 2003
  • pp: 972–978

Single-camera method to determine the optical axis position of ellipsoidal drops

B. K. Jones, J. R. Saylor, and L. F. Bliven  »View Author Affiliations


Applied Optics, Vol. 42, Issue 6, pp. 972-978 (2003)
http://dx.doi.org/10.1364/AO.42.000972


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Abstract

The sizing of droplets by optical imaging typically requires a small depth of field so that variations in the magnification ratio are minimized. However, if the location of the drop along the optical axis can be determined, a variable magnification ratio can be imposed on each imaged drop, and the depth of field can be increased. Previous research suggested that droplet location can be determined with a characteristic of droplet images that is obtained when the droplet is illuminated from behind. In this prior research, the method was demonstrated with spherical glass objects to simulate raindrops. Raindrops are known to deviate significantly from a spherical shape, especially when the drop size is large. We demonstrate the ability to locate the position of objects that deviate from sphericity. Deformed water drops and glass ellipsoids are tested, along with glass spheres. The role of refractive index is also discussed.

© 2003 Optical Society of America

OCIS Codes
(000.2170) General : Equipment and techniques
(010.1100) Atmospheric and oceanic optics : Aerosol detection
(110.0110) Imaging systems : Imaging systems
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(280.1100) Remote sensing and sensors : Aerosol detection

History
Original Manuscript: May 10, 2002
Revised Manuscript: October 25, 2002
Published: February 20, 2003

Citation
B. K. Jones, J. R. Saylor, and L. F. Bliven, "Single-camera method to determine the optical axis position of ellipsoidal drops," Appl. Opt. 42, 972-978 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-6-972

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