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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 15, Iss. 11 — Nov. 1, 1976
  • pp: 2860–2865

Photographic image intensification by autoradiography

Barbara S. Askins  »View Author Affiliations


Applied Optics, Vol. 15, Issue 11, pp. 2860-2865 (1976)
http://dx.doi.org/10.1364/AO.15.002860


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Abstract

Images on developed photographic emulsions can be significantly intensified by making the image silver radioactive and exposing a second emulsion to this radiation. Because the print, an autoradiograph, reproduces the original with significant increases in density and contrast, the method can be used to enhance underexposed emulsions and to increase the limits of photographic detection. This paper reports a new, practical chemical method for activating the silver, using thiourea labeled with sulfur-35, a process convenient for use in photographic laboratories. Speed increases of 13 and contrast increases of 18 were achieved with Kodak Plus-X film in this initial phase.

© 1976 Optical Society of America

History
Original Manuscript: May 15, 1976
Published: November 1, 1976

Citation
Barbara S. Askins, "Photographic image intensification by autoradiography," Appl. Opt. 15, 2860-2865 (1976)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-15-11-2860


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References

  1. W. C. Lewis, J. H. James, Photogr. Sci. Eng. 13, 54 (1969).
  2. A. G. Smith, H. W. Schrader, W. W. Richardson, Appl. Opt. 10, 1597 (1971).
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  12. Ref. 10, p. 148.
  13. Ref. 8, pp. A1–A5.
  14. Ref. 7, pp. 80–81.
  15. See Nuclear Regulatory Commission Code of Regulations, Title ;10, Part 20, Paragraph 303.
  16. The speed and grain size of Kodak X-ray films decrease in the order: AA, M, R. Double-coated film is used only because it is readily available from radiographers, the second coat serving no useful purpose in autoradiography since the range of the beta particles limits them to one side of the emulsion.
  17. W. Thomas, Ed., SPSE Handbook of Photographic Science and Engineering (Wiley, New York, 1973), p. 819.
  18. Ref. 17, p. 816.
  19. USAF Resolving Power Test Target prepared by Buckbee-Mears Company, St. Paul, Minn.
  20. Information on licensing and required safety procedures can be obtained from U.S. Nuclear Regulatory Commission, Division of Materials Licensing, Washington, D.C. 20545.

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