Abstract

A simple spectrograph designed around a 16-mm movie camera is described. The spectrograph was built for the purpose of obtaining spectrograms from light sources showing transient phenomena, in particular such light sources as the new types of rocket and jet combustion engines. The study of the light emitted from an acetylene-oxygen flame as a function of time illustrates its usefulness.

© 1948 Optical Society of America

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References

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  1. For example, see B. L. Crawford and C. Huggett, Rev. Sci. Inst. 17, 213 (1946).
    [Crossref]
  2. The angular separation between the emergent C and F lines is 6°50′. The clear aperture of the 5-element prism is 20×20 mm.
  3. The notation employed is that given by W. Jevons in Report on Band-Spectra of Diatomic Molecules (The Cambridge University Press, Teddington, England, 1932) in which the single primes denote the upper state.

1946 (1)

For example, see B. L. Crawford and C. Huggett, Rev. Sci. Inst. 17, 213 (1946).
[Crossref]

Crawford, B. L.

For example, see B. L. Crawford and C. Huggett, Rev. Sci. Inst. 17, 213 (1946).
[Crossref]

Huggett, C.

For example, see B. L. Crawford and C. Huggett, Rev. Sci. Inst. 17, 213 (1946).
[Crossref]

Jevons, W.

The notation employed is that given by W. Jevons in Report on Band-Spectra of Diatomic Molecules (The Cambridge University Press, Teddington, England, 1932) in which the single primes denote the upper state.

Rev. Sci. Inst. (1)

For example, see B. L. Crawford and C. Huggett, Rev. Sci. Inst. 17, 213 (1946).
[Crossref]

Other (2)

The angular separation between the emergent C and F lines is 6°50′. The clear aperture of the 5-element prism is 20×20 mm.

The notation employed is that given by W. Jevons in Report on Band-Spectra of Diatomic Molecules (The Cambridge University Press, Teddington, England, 1932) in which the single primes denote the upper state.

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Figures (3)

Fig. 1
Fig. 1

Schematic diagram of plan view of the moving picture spectrograph. The condenser system, slit and collimating system are shown at A, B and C respectively. The 5-element direct vision prism is shown at D, while the moving picture camera and telephoto lens are represented at F and E.

Fig. 2
Fig. 2

Spectrograms of an acetylene flame showing the effect of varying the oxygen-fuel ratio. The sequences are from top to bottom and right to left, with the long wave-length end of the spectrum to the right.

Fig. 3
Fig. 3

Microphotometer curves of typical spectra of an oxygen-acetylene flame photographed with a cinema-spectrograph, during burning with a high acetylene-to-oxygen ratio.