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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 24 — Dec. 15, 2010
  • pp: 4214–4216

Autofocus technique for three-dimensional imaging, direct-detection laser radar using Geiger-mode avalanche photodiode focal-plane array

Min Seok Oh, Hong Jin Kong, Tae Hoon Kim, and Sung Eun Jo  »View Author Affiliations


Optics Letters, Vol. 35, Issue 24, pp. 4214-4216 (2010)
http://dx.doi.org/10.1364/OL.35.004214


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Abstract

An autofocus technique is proposed for a three-dimensional imaging, direct-detection laser radar system that uses a Geiger-mode avalanche photodiode focal plane array (GmAPD-FPA). This technique is implemented by pointing laser pulses on a target of interest and observing its scattered photon distribution on a GmAPD-FPA. Measuring the standard deviation of the photon distribution on a GmAPD-FPA enables the best focus condition to be found. The feasibility of this technique is demonstrated experimentally by employing a 1 × 8 pixel GmAPD-FPA. It is shown that the spatial resolution improves when the GmAPD-FPA is located in the best focus position found by the autofocus technique.

© 2010 Optical Society of America

OCIS Codes
(110.6880) Imaging systems : Three-dimensional image acquisition

ToC Category:
Imaging Systems

History
Original Manuscript: July 28, 2010
Revised Manuscript: November 11, 2010
Manuscript Accepted: November 13, 2010
Published: December 15, 2010

Citation
Min Seok Oh, Hong Jin Kong, Tae Hoon Kim, and Sung Eun Jo, "Autofocus technique for three-dimensional imaging, direct-detection laser radar using Geiger-mode avalanche photodiode focal-plane array," Opt. Lett. 35, 4214-4216 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-24-4214


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