Abstract

A description is given of the application of the electron-multiplier photo-tube and the light-chopping method to the design of a densitometer. The techniques discussed are generally applicable to the measurement of very low light intensities.

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References

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  1. H. Rosenberg, Zeits. f. Instrumentenkunde 45, 313 (1925).
  2. W. S. Baird, "A new non-recording densitometer," J. Opt. Soc. Am. 31, 179–180 (Feb. 1941).
  3. G. M. B. Dobson, Proc. Roy. Soc. 104, 248 (1923).
  4. G. R. Harrison, in Chapter IX of W. E. Forsythe's Measurement of Radiant Energy (McGraw-Hill Book Company, Inc., New York, 1937), p. 291.
  5. A. C. Hardy, "A recording photoelectric color analyzer," J. Opt. Soc. Am. 18, 96 (1929).
  6. For properties of these tubes see manufacturer's data and G. H. Dieke, "The use of multiplier phototubes in spectrographic analysis," OPRD-WPB, Report No. W-193, May 1, 1945.
  7. H. H. Scott, "A new type of selective circuit and some applications," Proc. I.R.E. 26, 226 (Feb., 1938).

1929

Baird, W. S.

Dobson, G. M. B

G. M. B. Dobson, Proc. Roy. Soc. 104, 248 (1923).

Hardy, A. C.

Harrison, G. R.

G. R. Harrison, in Chapter IX of W. E. Forsythe's Measurement of Radiant Energy (McGraw-Hill Book Company, Inc., New York, 1937), p. 291.

Rosenberg, H.

H. Rosenberg, Zeits. f. Instrumentenkunde 45, 313 (1925).

Scott, H. H.

H. H. Scott, "A new type of selective circuit and some applications," Proc. I.R.E. 26, 226 (Feb., 1938).

J. Opt. Soc. Am.

Proc. I.R.E.

H. H. Scott, "A new type of selective circuit and some applications," Proc. I.R.E. 26, 226 (Feb., 1938).

Other

H. Rosenberg, Zeits. f. Instrumentenkunde 45, 313 (1925).

For properties of these tubes see manufacturer's data and G. H. Dieke, "The use of multiplier phototubes in spectrographic analysis," OPRD-WPB, Report No. W-193, May 1, 1945.

G. M. B. Dobson, Proc. Roy. Soc. 104, 248 (1923).

G. R. Harrison, in Chapter IX of W. E. Forsythe's Measurement of Radiant Energy (McGraw-Hill Book Company, Inc., New York, 1937), p. 291.

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