OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 9, Iss. 2 — Feb. 1, 1970
  • pp: 421–428

The Effects of Particle Size on Contrast Improvement by Polarization Discrimination for Underwater Targets

G. D. Gilbert  »View Author Affiliations


Applied Optics, Vol. 9, Issue 2, pp. 421-428 (1970)
http://dx.doi.org/10.1364/AO.9.000421


View Full Text Article

Enhanced HTML    Acrobat PDF (929 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

Luminous flux was measured from an underwater target illuminated by circularly polarized lamp. Backscatter was measured with and without a circular analyzer on the telephotometer. Turbidity of the water was controlled by adding polystyrene spheres of relative refractive index m = 1.20. Contrasts were determined as a function of particle diameter and concentration for spheres ranging from 0.126 μ to 1.099 μ and for three size distributions from 6 μ to 100 μ. A ratio comparison of the contrasts showed a definite improvement for scatterers of diameters < 1 μ. Contrast degraded for CP illuminated scattering from spheres in the 1–100-μ diam range. Considering the ocean’s scatterer-size distributions, circular polarization will probably most improve contrast in the vertical region from the lower euphotic zone to a few meters above bottom.

© 1970 Optical Society of America

History
Original Manuscript: July 23, 1969
Published: February 1, 1970

Citation
G. D. Gilbert, "The Effects of Particle Size on Contrast Improvement by Polarization Discrimination for Underwater Targets," Appl. Opt. 9, 421-428 (1970)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-9-2-421


Sort:  Author  |  Year  |  Journal  |  Reset  

References

  1. G. D. Gilbert, J. C. Pernika, Appl. Opt. 6, 741 (1967). [CrossRef] [PubMed]
  2. H. C. Van De Hulst, Light Scattering by Small Particles (John Wiley & Sons, Inc., New York, 1967).
  3. M. Born, E. Wolf, Principles of Optics (Pergamon Press, New York, 1965).
  4. G. Dietrich, General Oceanography (John Wiley & Sons, Inc., New York, 1963).
  5. S. Q. Duntley, J. Opt. Soc. Amer. 53, 214 (1963). [CrossRef]
  6. J. E. Tyler, J. Opt. Soc. Amer. 47, 745 (1957). [CrossRef]
  7. J. E. Tyler, Limnol. Oceanog. 6, 451 (1961). [CrossRef]
  8. W. V. Burt, Ph.D. Dissertation in oceanography, University of California, Los Angeles, May1955.
  9. G. D. Gilbert, “Deep Sea Light Attenuation Measurements at 2000 Meter Depths,” U. S. Naval Ordnance Test Station, China Lake, Calif., Tech. Rept. (NOTS TP 3994), December1965.
  10. G. D. Gilbert, R. O. Rue, “Light Attenuation Measurements off the Coast of Baja California,” U. S. Naval Ordnance Test Station, China Lake, Calif., Tech. Rept. (NOTS TP 4343), May1967.
  11. N. G. Jerlov, “Optical Studies of Ocean Waters,” Repts. Swed. Deep-Sea Expedition 3, 11 (1951).
  12. H. V. Sverdrup, M. W. Johnson, R. V. Fleming, The Oceans (Prentice-Hall, Englewood Cliffs, N. J.1942), pp. 946–993.
  13. W. H. Tolbert, “On the Concentration and Size Distribution of Particulate Matter in Sea Water,” U. S. Naval Mine Defense Lab.Panama City, Fla., Tech. Paper (TP 168), August1959.
  14. N. G. Jerlov, Tellus 7, 218 (1955). [CrossRef]

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