Abstract

A predispersion device is described for use with stigmatic spectrographs equipped with a grating blazed for high orders. It employs the Wadsworth prism–mirror arrangement and is extremely simple both to construct and to operate. Data are given to enable the device to be used with a prism of crown glass, heavy flint glass, or fused quartz.

© 1967 Optical Society of America

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References

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  1. R. F. Jarrell, J. Opt. Soc. Am. 45, 259 (1955).
    [CrossRef]
  2. J. Reader, L. C. Marquet, S. P. Davis, Appl. Opt. 2, 963 (1963).
  3. R. A. Sawyer, Experimental Spectroscopy, (Dover Publications, Inc., New York, 1963), p. 79.
  4. Ref. 3, p. 60.

1963 (1)

1955 (1)

Appl. Opt. (1)

J. Opt. Soc. Am. (1)

Other (2)

R. A. Sawyer, Experimental Spectroscopy, (Dover Publications, Inc., New York, 1963), p. 79.

Ref. 3, p. 60.

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Figures (5)

Fig. 1
Fig. 1

Principle of the order sorter.

Fig. 2
Fig. 2

Inclination of the plane of reflection to the horizontal as a function of wavelength for crown glass, heavy flint glass, and fused quartz.

Fig. 3
Fig. 3

Angular dispersion dD/(dλ) as a function of wavelength for crown glass, heavy flint glass, and fused quartz.

Fig. 4
Fig. 4

Assembled order sorter.

Fig. 5
Fig. 5

Section of the spectrum of gadolinium, showing the fourteenth to seventeenth orders photographed simultaneously.

Equations (4)

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D ( mm / Å ) = m f / ( d cos θ ) ,
n = 2 sin [ 30 + ( D / 2 ) ] .
α λ = sin - 1 ( n λ / 2 ) - 30 ,
d D d λ = ( d D d n ) ( d n d λ ) = ( 1 ( 1 - n 2 / 4 ) 1 2 ) ( d n d λ ) .

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