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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 10 — Apr. 1, 2011
  • pp: 1405–1412

Design of an in-line, digital holographic imaging system for airborne measurement of clouds

Scott M. Spuler and Jacob Fugal  »View Author Affiliations

Applied Optics, Vol. 50, Issue 10, pp. 1405-1412 (2011)

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We discuss the design and performance of an airborne (underwing) in-line digital holographic imaging system developed for characterizing atmospheric cloud water droplets and ice particles in situ. The airborne environment constrained the design space to the simple optical layout that in-line non-beam- splitting holography affords. The desired measurement required the largest possible sample volume in which the smallest desired particle size ( 5 μm ) could still be resolved, and consequently the magnification requirement was driven by the pixel size of the camera and this particle size. The resulting design was a seven-element, double-telecentric, high-precision optical imaging system used to relay and magnify a hologram onto a CCD surface. The system was designed to preserve performance and high resolution over a wide temperature range. Details of the optical design and construction are given. Experimental results demonstrate that the system is capable of recording holograms that can be reconstructed with resolution of better than 6.5 μm within a 15 cm 3 sample volume.

© 2011 Optical Society of America

OCIS Codes
(010.1100) Atmospheric and oceanic optics : Aerosol detection
(090.0090) Holography : Holography
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(220.3620) Optical design and fabrication : Lens system design

ToC Category:

Original Manuscript: December 14, 2010
Manuscript Accepted: January 21, 2011
Published: March 28, 2011

Scott M. Spuler and Jacob Fugal, "Design of an in-line, digital holographic imaging system for airborne measurement of clouds," Appl. Opt. 50, 1405-1412 (2011)

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