Abstract

A thermoelectric photometer, designed and built at the Amherst College Observatory, is described. The instrument is much simpler and considerably less expensive than those which have been described by other authors. It contains a novel method for detecting and controlling variations in the intensity of the photometer lamp independently of the measuring galvanometer. Measures may be made more rapidly with this instrument than with the other types of thermoelectric photometers and the results are equally accurate.

© 1935 Optical Society of America

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References

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  1. Schilt, Bulletin of the Astronomical Institutes of the Netherlands 2, 135 (1924).
  2. Bennett, Astrophys. J. 78, 305 (1933).
    [Crossref]
  3. Christie, Mt. Wilson Contr. No. 476;Astrophys. J. 78, 313 (1933).
    [Crossref]
  4. J. T. Lay and I. C. Cornog, J. Opt. Soc. Am. 24, 149 (1934).
    [Crossref]
  5. G. R. Harrison, J. Opt. Soc. Am. 19, 268 (1929).
  6. Schilt, Trans. Astro. Obs. Yale University 9, 30 (1933).
  7. A. deSitter, Bull. Astro. Inst. Netherlands 6, 65 (1932).

1934 (1)

1933 (2)

Bennett, Astrophys. J. 78, 305 (1933).
[Crossref]

Schilt, Trans. Astro. Obs. Yale University 9, 30 (1933).

1932 (1)

A. deSitter, Bull. Astro. Inst. Netherlands 6, 65 (1932).

1929 (1)

G. R. Harrison, J. Opt. Soc. Am. 19, 268 (1929).

1924 (1)

Schilt, Bulletin of the Astronomical Institutes of the Netherlands 2, 135 (1924).

Bennett,

Bennett, Astrophys. J. 78, 305 (1933).
[Crossref]

Christie,

Christie, Mt. Wilson Contr. No. 476;Astrophys. J. 78, 313 (1933).
[Crossref]

Cornog, I. C.

deSitter, A.

A. deSitter, Bull. Astro. Inst. Netherlands 6, 65 (1932).

Harrison, G. R.

G. R. Harrison, J. Opt. Soc. Am. 19, 268 (1929).

Lay, J. T.

Schilt,

Schilt, Trans. Astro. Obs. Yale University 9, 30 (1933).

Schilt, Bulletin of the Astronomical Institutes of the Netherlands 2, 135 (1924).

Astrophys. J. (1)

Bennett, Astrophys. J. 78, 305 (1933).
[Crossref]

Bull. Astro. Inst. Netherlands (1)

A. deSitter, Bull. Astro. Inst. Netherlands 6, 65 (1932).

Bulletin of the Astronomical Institutes of the Netherlands (1)

Schilt, Bulletin of the Astronomical Institutes of the Netherlands 2, 135 (1924).

J. Opt. Soc. Am. (2)

J. T. Lay and I. C. Cornog, J. Opt. Soc. Am. 24, 149 (1934).
[Crossref]

G. R. Harrison, J. Opt. Soc. Am. 19, 268 (1929).

Trans. Astro. Obs. Yale University (1)

Schilt, Trans. Astro. Obs. Yale University 9, 30 (1933).

Other (1)

Christie, Mt. Wilson Contr. No. 476;Astrophys. J. 78, 313 (1933).
[Crossref]

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Figures (5)

F. 1
F. 1

Optical system of the measuring portion of the instrument.

F. 2
F. 2

The measuring portion of the Amherst photometer.

F. 3
F. 3

The Amherst thermoelectric photometer.

F. 4
F. 4

The electric circuit for the photometer lamp.

F. 5
F. 5

Potentiometer control circuit for the photometer lamp.