OSA's Digital Library

Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 41, Iss. 11 — Nov. 1, 1951
  • pp: 752–757

New Criteria for Contact Printing in Aerial Photography

L. E. HOWLETT and D. L. MATTHEWS  »View Author Affiliations


JOSA, Vol. 41, Issue 11, pp. 752-757 (1951)
http://dx.doi.org/10.1364/JOSA.41.000752


View Full Text Article

Acrobat PDF (1384 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

Print value in aerial photography carried out to meet technical requirements is determined almost entirely by the amount of recoverable information. This can be evaluated by measuring the photographic resolving power. The work reported here applies resolving power methods to the selection and exposure of contact photographic papers for aerial photography. Negatives on Aero Super-XX and Aero Panatomic-X have been used for the investigation. Most of the work was done with a chloride emulsion but some experiments with a bromide emulsion led to similar conclusions.

It was found that with Aero Super-XX the most generally useful single print is made on a low contrast grade of paper, except for restricted brightness ranges of low contrasts. With Aero Panatomic-X, a single high contrast grade should be used. The higher resolution of the finer grained film is partially lost in the printing.

Glossy paper preserves most of the available information on the film. It is adequate, but much inferior to transparencies. Other paper surfaces lead to more or less serious losses.

Effects of inaccurate paper exposure are shown for different contrast grades. Exposure tolerance and resolving power over the useful range of the film indicate the lower contrast grades to be the most useful for the great majority of air negatives on Aero Super-XX.

Great overexposure but only slight underexposure of film may be compensated for in printing. Maximum and minimum usable paper densities are given.

Citation
L. E. HOWLETT and D. L. MATTHEWS, "New Criteria for Contact Printing in Aerial Photography," J. Opt. Soc. Am. 41, 752-757 (1951)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-41-11-752


Sort:  Author  |  Journal  |  Reset

References

  1. Loyd A. Jones, J. Franklin Inst. 227, 297, 497 (1939).
  2. L. A. Jones and C. N. Nelson, J. Opt. Soc. Am. 30, 93 (1940).
  3. L. A. Jones and C. N. Nelson, J. Opt. Soc. Am. 32, 558 (1942).
  4. P. D. Carman and R. A. F. Carruthers, J. Opt. Soc. Am. 41, 305 (1951).
  5. D. E. Macdonald (private communication).
  6. L. E. Howlett, Can. J. Research A24, 1 (1946).
  7. L. E. Howlett, Can. J. Research A26, 60 (1948).
  8. L. E. Howlett, Can. J. Research A24, 15 (1946).
  9. K. M. Baird, Can. J. Research A27, 130 (1949).
  10. K. Huse, J. Opt. Soc. Am. 1, 119 (1917).
  11. O. Sandvik and G. Silberstein, J. Opt. Soc. Am. and Rev. Sci. Instr. 17, 107 (1928).
  12. Mary Johnson, J. Opt. Soc. Am. 41, 748 (1951).

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