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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 39, Iss. 9 — Sep. 1, 1949
  • pp: 729–730

The Rise in Brightness of Infra-Red Sensitive Phosphors

ROBERT C. HERMAN and CHARLES F. MEYER  »View Author Affiliations

JOSA, Vol. 39, Issue 9, pp. 729-730 (1949)

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A phenomenological theory of infra-red sensitive phosphors is given which assumes the existence of two types of luminescent centers in order to account for the so-called “inertia” effects in the rise of brightness. The equations describing the electron transfer processes have been integrated and show under certain conditions a very rapid initial rise in brightness followed by a relatively slow attainment of the maximum. The effect of varying the intensity of the stimulating infra-red radiation is discussed.

ROBERT C. HERMAN and CHARLES F. MEYER, "The Rise in Brightness of Infra-Red Sensitive Phosphors," J. Opt. Soc. Am. 39, 729-730 (1949)

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  1. Scott, Thompson, and Ellickson, J. Opt. Soc. Am. 39, 64 (1949).
  2. W. de Groot, Physica 6, 275 (1939).
  3. R. C. Herman and C. F. Meyer, T. App. Phys. 17, 743 (1946); J. App. Phys. 18, 258 (1947).
  4. Herman, Meyer, and Hopfield, T. Opt. Soc. Am. 38, 999 (1948).
  5. W. L. Parker and J. J. Dropkin, Phys. Rev. 74, 1242 (1948).

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