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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 46, Iss. 4 — Apr. 1, 1956
  • pp: 300–302

Conclusions from the Characteristic Curves of Photographic Plates, Minimum Effect of Grain

O. OLDENBERG  »View Author Affiliations

JOSA, Vol. 46, Issue 4, pp. 300-302 (1956)

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By a consistent argument, based on the characteristic curves of photographic plates, the optimum conditions for the following spectrographic problems are derived: weak emission line without background; weak absorption line; weak emission line on a given continuous background; prefogging; measurement of relative intensities. The effect of the grain on the resolving power is minimized by averaging over the length of the line. This technique gives to the very sensitive plate (Kodak type I-O), in spite of its coarse grain, the same high resolving power as that of a very fine grain plate which requires a 90 times longer exposure.

O. OLDENBERG, "Conclusions from the Characteristic Curves of Photographic Plates, Minimum Effect of Grain," J. Opt. Soc. Am. 46, 300-302 (1956)

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  1. G. R. Harrison gave a detailed discussion of photographic photometry in J. Opt. Soc. Am. 19, 267 (1929) and 20, 313 (1930).
  2. O. Oldenberg, J. Chem. Phys. 3, 267 (1935).
  3. L. M. Branscomb, J. Opt. Soc. Am. 41, 255 and 862 (1951). Branscomb's rigorous treatment takes into account the effect of grain fluctuations which depend on the transmission of the plate.
  4. W. Linnik, Z. Physik 61, 700 (1930). Related methods are described by O. Oldenberg, Z. Physik 58, 722 (1929).
  5. L. M. Branscomb, Phys. Rev. 82, 86 (1951).

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