Abstract

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

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  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).

Baird, K. M.

K. M. Baird, Can. J. Research A27, 130 (1949).

Carman, P. D.

P. D. Carman and R. A. F. Carruthers, J. Opt. Soc. Am. 41, 305 (1951).

Carruthers, R. A. F.

P. D. Carman and R. A. F. Carruthers, J. Opt. Soc. Am. 41, 305 (1951).

Howlett, L. E.

L. E. Howlett, Can. J. Research A24, 15 (1946).

L. E. Howlett, Can. J. Research A26, 60 (1948).

L. E. Howlett, Can. J. Research A24, 1 (1946).

Huse, K.

K. Huse, J. Opt. Soc. Am. 1, 119 (1917).

Johnson, Mary

Mary Johnson, J. Opt. Soc. Am. 41, 748 (1951).

Jones, L. A.

L. A. Jones and C. N. Nelson, J. Opt. Soc. Am. 32, 558 (1942).

L. A. Jones and C. N. Nelson, J. Opt. Soc. Am. 30, 93 (1940).

Jones, Loyd A.

Loyd A. Jones, J. Franklin Inst. 227, 297, 497 (1939).

Macdonald, D. E.

D. E. Macdonald (private communication).

Nelson, C. N.

L. A. Jones and C. N. Nelson, J. Opt. Soc. Am. 32, 558 (1942).

L. A. Jones and C. N. Nelson, J. Opt. Soc. Am. 30, 93 (1940).

Sandvik, O.

O. Sandvik and G. Silberstein, J. Opt. Soc. Am. and Rev. Sci. Instr. 17, 107 (1928).

Silberstein, G.

O. Sandvik and G. Silberstein, J. Opt. Soc. Am. and Rev. Sci. Instr. 17, 107 (1928).

Other (12)

Loyd A. Jones, J. Franklin Inst. 227, 297, 497 (1939).

L. A. Jones and C. N. Nelson, J. Opt. Soc. Am. 30, 93 (1940).

L. A. Jones and C. N. Nelson, J. Opt. Soc. Am. 32, 558 (1942).

P. D. Carman and R. A. F. Carruthers, J. Opt. Soc. Am. 41, 305 (1951).

D. E. Macdonald (private communication).

L. E. Howlett, Can. J. Research A24, 1 (1946).

L. E. Howlett, Can. J. Research A26, 60 (1948).

L. E. Howlett, Can. J. Research A24, 15 (1946).

K. M. Baird, Can. J. Research A27, 130 (1949).

K. Huse, J. Opt. Soc. Am. 1, 119 (1917).

O. Sandvik and G. Silberstein, J. Opt. Soc. Am. and Rev. Sci. Instr. 17, 107 (1928).

Mary Johnson, J. Opt. Soc. Am. 41, 748 (1951).

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