Abstract

The performance of a plane, unblazed grating (600 lines/mm) as a predisperser has been investigated. Placed 7 cm in front of the primary slit of a 2-m grazing incidence vacuum spectrograph, the foregratingallowed passage of uv (100 to 500 Å) into the spectrograph in 50 to 150 Å bands. The spurious background observed when radiation passed directly through the primary slit was found to be absent from the predispersed spectra, which have been observed by both photographic and photoelectric methods. These spectra, free from scattered background and second-order images, exhibited measurable line displacement,up to 0.3 mm from the line image positions of the direct spectra. Such displacement, occuring naturally with the plane foregrating and shown to be in agreement with theoretical predictions, are sometimes found as a result of source misalignment with grazing incidence instruments. Use was made of the foregrating for isolation of true continuum radiation for the Vodar vacuum sliding spark and linear pinch sources.

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  1. A. K. Pierce, J. Opt. Soc. Am. 17, 6 (1957).
  2. R. F. Jarrell, J. Opt. Soc. Am. 45, 259 (1955).
  3. J. Reader and S. P. Davis, J. Opt. Soc. Am. 53, 431 (1963).
  4. J. Reader, L. C. Marquet, and S. P. Davis, Appl. Opt. 2, 963 (1963).
  5. P. A. Brix and G. Herzberg, Can. J. Phys. 32, 110 (1954).
  6. R. W. Wood, J. Opt. Soc. Am. 37, 733 (1947).
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  8. C. R. Detwiler, J. D. Purcell, and R. Tousey, Mem. Soc. Roy. Sci. Liège 4, 253 (1961).
  9. J. D. Purcell and R. Tousey, J. Geophys. Res. 65, 370 (1960); Mem. Soc. Roy. Sci. Liège 4, 283 (1961).
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  11. R. A. Sawyer, Experimental Spectroscopy (Prentice-Hall, Inc., New York, 1951), p. 153.
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  15. G. Balloffet, Ann. Phys. (France) 5, 1256 (1960).
  16. E. Alexander, U. Feldman, and B. S. Fraenkel, J. Quant. Spectry. Radiative Transfer 4, 501 (1964).
  17. Josef Gschwendtner designed and built this source.
  18. H. Schindler, Z. Naturforsch. 19a, 697 (1964).
  19. G. Sprague, D. H. Tomboulian, and D. E. Bedo, J. Opt. Soc. Am. 45, 756 (1955).
  20. J. C. Miller, J. Opt. Soc. Am. 54, 353 (1964).
  21. T. Namioka, J. Opt. Soc. Am. 49, 450 (1959).

Alexander, E.

E. Alexander, U. Feldman, and B. S. Fraenkel, J. Quant. Spectry. Radiative Transfer 4, 501 (1964).

Astoin, N.

B. Vodar and N. Astoin, Nature 166, 1029 (1950).

Balloffet, G.

G. Balloffet, Ann. Phys. (France) 5, 1256 (1960).

Bedo, D. E.

G. Sprague, D. H. Tomboulian, and D. E. Bedo, J. Opt. Soc. Am. 45, 756 (1955).

Brix, P. A.

P. A. Brix and G. Herzberg, Can. J. Phys. 32, 110 (1954).

Davis, S. P.

J. Reader and S. P. Davis, J. Opt. Soc. Am. 53, 431 (1963).

J. Reader, L. C. Marquet, and S. P. Davis, Appl. Opt. 2, 963 (1963).

Detwiler, C. R.

C. R. Detwiler, J. D. Purcell, and R. Tousey, Mem. Soc. Roy. Sci. Liège 4, 253 (1961).

Douglas, A. E.

A. E. Douglas and G. Herzberg, J. Opt. Soc. Am. 47, 625 (1957).

Eldén, B.

J. E. Mack, J. R. Stehn, and B. Eldén, J. Opt. Soc. Am. 22, 245 (1931).

Feldman, U.

E. Alexander, U. Feldman, and B. S. Fraenkel, J. Quant. Spectry. Radiative Transfer 4, 501 (1964).

Fraenkel, B. S.

E. Alexander, U. Feldman, and B. S. Fraenkel, J. Quant. Spectry. Radiative Transfer 4, 501 (1964).

Herzberg, G.

P. A. Brix and G. Herzberg, Can. J. Phys. 32, 110 (1954).

A. E. Douglas and G. Herzberg, J. Opt. Soc. Am. 47, 625 (1957).

Jarrell, R. F.

R. F. Jarrell, J. Opt. Soc. Am. 45, 259 (1955).

Mack, J. E.

J. E. Mack, J. R. Stehn, and B. Eldén, J. Opt. Soc. Am. 22, 245 (1931).

Marquet, L. C.

J. Reader, L. C. Marquet, and S. P. Davis, Appl. Opt. 2, 963 (1963).

Miller, J. C.

J. C. Miller, J. Opt. Soc. Am. 54, 353 (1964).

Murty, M. V. R. K.

M. V. R. K. Murty, J. Opt. Soc. Am. 52, 768 (1962).

Namioka, T.

T. Namioka, J. Opt. Soc. Am. 49, 450 (1959).

Pierce, A. K.

A. K. Pierce, J. Opt. Soc. Am. 17, 6 (1957).

Purcell, J. D.

C. R. Detwiler, J. D. Purcell, and R. Tousey, Mem. Soc. Roy. Sci. Liège 4, 253 (1961).

J. D. Purcell and R. Tousey, J. Geophys. Res. 65, 370 (1960); Mem. Soc. Roy. Sci. Liège 4, 283 (1961).

Reader, J.

J. Reader, L. C. Marquet, and S. P. Davis, Appl. Opt. 2, 963 (1963).

J. Reader and S. P. Davis, J. Opt. Soc. Am. 53, 431 (1963).

Sawyer, R. A.

R. A. Sawyer, Experimental Spectroscopy (Prentice-Hall, Inc., New York, 1951), p. 153.

Schindler, H.

H. Schindler, Z. Naturforsch. 19a, 697 (1964).

Sprague, G.

G. Sprague, D. H. Tomboulian, and D. E. Bedo, J. Opt. Soc. Am. 45, 756 (1955).

Stehn, J. R.

J. E. Mack, J. R. Stehn, and B. Eldén, J. Opt. Soc. Am. 22, 245 (1931).

Tomboulian, D. H.

G. Sprague, D. H. Tomboulian, and D. E. Bedo, J. Opt. Soc. Am. 45, 756 (1955).

Tousey, R.

J. D. Purcell and R. Tousey, J. Geophys. Res. 65, 370 (1960); Mem. Soc. Roy. Sci. Liège 4, 283 (1961).

C. R. Detwiler, J. D. Purcell, and R. Tousey, Mem. Soc. Roy. Sci. Liège 4, 253 (1961).

Vodar, B.

B. Vodar and N. Astoin, Nature 166, 1029 (1950).

Weissler, G. L.

G. L. Weissler, ICO Conference, September 1964, Tokyo and Kyoto, Japan. J. Appl. Phys. Suppl. 4, 486 (1965).

Wood, R. W.

R. W. Wood, J. Opt. Soc. Am. 37, 733 (1947).

Other (21)

A. K. Pierce, J. Opt. Soc. Am. 17, 6 (1957).

R. F. Jarrell, J. Opt. Soc. Am. 45, 259 (1955).

J. Reader and S. P. Davis, J. Opt. Soc. Am. 53, 431 (1963).

J. Reader, L. C. Marquet, and S. P. Davis, Appl. Opt. 2, 963 (1963).

P. A. Brix and G. Herzberg, Can. J. Phys. 32, 110 (1954).

R. W. Wood, J. Opt. Soc. Am. 37, 733 (1947).

A. E. Douglas and G. Herzberg, J. Opt. Soc. Am. 47, 625 (1957).

C. R. Detwiler, J. D. Purcell, and R. Tousey, Mem. Soc. Roy. Sci. Liège 4, 253 (1961).

J. D. Purcell and R. Tousey, J. Geophys. Res. 65, 370 (1960); Mem. Soc. Roy. Sci. Liège 4, 283 (1961).

M. V. R. K. Murty, J. Opt. Soc. Am. 52, 768 (1962).

R. A. Sawyer, Experimental Spectroscopy (Prentice-Hall, Inc., New York, 1951), p. 153.

J. E. Mack, J. R. Stehn, and B. Eldén, J. Opt. Soc. Am. 22, 245 (1931).

G. L. Weissler, ICO Conference, September 1964, Tokyo and Kyoto, Japan. J. Appl. Phys. Suppl. 4, 486 (1965).

B. Vodar and N. Astoin, Nature 166, 1029 (1950).

G. Balloffet, Ann. Phys. (France) 5, 1256 (1960).

E. Alexander, U. Feldman, and B. S. Fraenkel, J. Quant. Spectry. Radiative Transfer 4, 501 (1964).

Josef Gschwendtner designed and built this source.

H. Schindler, Z. Naturforsch. 19a, 697 (1964).

G. Sprague, D. H. Tomboulian, and D. E. Bedo, J. Opt. Soc. Am. 45, 756 (1955).

J. C. Miller, J. Opt. Soc. Am. 54, 353 (1964).

T. Namioka, J. Opt. Soc. Am. 49, 450 (1959).

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