Abstract

A spectrograph has been designed and constructed by the author which has the following characteristics: (1) It can be used to solve nearly every problem which requires the use of a glass prism spectrograph and a number of problems for which a 21-foot grating is usually required. (2) In the violet it is equivalent to a 21-foot 15,000 lines to the inch grating, in the second order with respect to resolving power and dispersion, and is free from ghosts. (3) The mounting is arranged in such a manner that more than 20 combinations are available by rather simple adjustments, giving a wide range of photographic speeds and dispersion. (Table I shows dispersion obtainable with different combinations of prisms and lenses.) (4) The spectrograph was constructed in our shop at a cost for optics and materials no greater than the cost of a small ready made single prism spectrograph.

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References

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  1. J. S. Foster, J. Opt. Soc. Am. 8, 373 (1924).
  2. P. Weiss and R. Fortrat-Archives des Sciences 35, 5–27 (1913).
  3. Urey, Brickwedde and Murphy, Phys. Rev. 40, 1 (1932).
  4. Rank, Phys. Rev. 42, 446 (1932).

Fortrat-Archives, R.

P. Weiss and R. Fortrat-Archives des Sciences 35, 5–27 (1913).

Foster, J. S.

J. S. Foster, J. Opt. Soc. Am. 8, 373 (1924).

Weiss, P.

P. Weiss and R. Fortrat-Archives des Sciences 35, 5–27 (1913).

Other (4)

J. S. Foster, J. Opt. Soc. Am. 8, 373 (1924).

P. Weiss and R. Fortrat-Archives des Sciences 35, 5–27 (1913).

Urey, Brickwedde and Murphy, Phys. Rev. 40, 1 (1932).

Rank, Phys. Rev. 42, 446 (1932).

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