Abstract

The spectral distribution for the excitation of phosphors is so erratic that it seems at present impossible to predict the location of strong excitation bands. Out of many phosphors examined in rare gas discharges, none was found to exceed in brightness the calcium tungstate and zinc silicate already in commercial use. The light output of the latter, however, was considerably improved by the elimination of the free silica usually present, which evidently has an appreciable absorption to radiation in the Schumann region. On the reasonable assumption that the resonance radiation is the source of excitation, the efficiency of fluorescence emitted by the zinc orthosilicate phosphor in the neon discharge denotes a quantum conversion near unity, just as in the low pressure mercury discharge.

© 1942 Optical Society of America

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References

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  1. G. E. Inman, Trans. I. E. S. 34, 65 (1939).
  2. H. G. Jenkins, British Patent457,486 (1935);A. Ruttenauer, Zeits. f. tech. Physik 17, 384 (1936);J. T. Randall, Roy. Soc. Arts 85, 354 (1937).
  3. H. G. Jenkins and J. N. Bowtell, Trans. Faraday Soc. 35, 154 (1939).
    [Crossref]
  4. Taro Suga and Masahide Kamiyama, J. Opt. Soc. Am. 31, 592 (1941).
    [Crossref]
  5. G. R. Fonda, J. Phys. Chem. 43, 561 (1939).
    [Crossref]

1941 (1)

1939 (3)

G. E. Inman, Trans. I. E. S. 34, 65 (1939).

H. G. Jenkins and J. N. Bowtell, Trans. Faraday Soc. 35, 154 (1939).
[Crossref]

G. R. Fonda, J. Phys. Chem. 43, 561 (1939).
[Crossref]

Bowtell, J. N.

H. G. Jenkins and J. N. Bowtell, Trans. Faraday Soc. 35, 154 (1939).
[Crossref]

Fonda, G. R.

G. R. Fonda, J. Phys. Chem. 43, 561 (1939).
[Crossref]

Inman, G. E.

G. E. Inman, Trans. I. E. S. 34, 65 (1939).

Jenkins, H. G.

H. G. Jenkins and J. N. Bowtell, Trans. Faraday Soc. 35, 154 (1939).
[Crossref]

H. G. Jenkins, British Patent457,486 (1935);A. Ruttenauer, Zeits. f. tech. Physik 17, 384 (1936);J. T. Randall, Roy. Soc. Arts 85, 354 (1937).

Kamiyama, Masahide

Suga, Taro

J. Opt. Soc. Am. (1)

J. Phys. Chem. (1)

G. R. Fonda, J. Phys. Chem. 43, 561 (1939).
[Crossref]

Trans. Faraday Soc. (1)

H. G. Jenkins and J. N. Bowtell, Trans. Faraday Soc. 35, 154 (1939).
[Crossref]

Trans. I. E. S. (1)

G. E. Inman, Trans. I. E. S. 34, 65 (1939).

Other (1)

H. G. Jenkins, British Patent457,486 (1935);A. Ruttenauer, Zeits. f. tech. Physik 17, 384 (1936);J. T. Randall, Roy. Soc. Arts 85, 354 (1937).

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Figures (3)

F. 1
F. 1

The relation between the fluorescence of zinc silicate phosphors and gas pressure in rare gas discharges at an arc current of 200 mA. A—neon; B—helium; C—argon; D—krypton.

F. 2
F. 2

The fluorescence of zinc silicate phosphors in the low pressure mercury vapor discharge. a—Zn2SiO4 · Mn; b—Zn2SiO4 · SiO2 · Mn.

F. 3
F. 3

The fluorescence of zinc silicate phosphors in rare gas discharges. a—Zn2SiO4 · Mn; b—Zn2SiO4 · SiO2 · Mn.