Abstract

High-resolution infrared spectroscopy with a small grating instrument has now been extended to wavelengths of nearly 200 microns. In the range 5–50 microns the achieved resolution was about 0.3 cm−1 or slightly better. Beyond 50 microns the resolution varied from 0.5 to 1.0 cm−1. No predispersive device was used, but filters, residual-ray reflections, selective chopping of radiation, and “off-blaze” use of the doubly passed gratings were employed to remove higher orders from the spectra. These devices are discussed briefly and their characteristics for the various spectral regions have been tabulated. Calibration has been carried out with higher orders of atomic emission lines and absorption lines of previously measured molecular spectra. Wave-number precision is estimated as about 0.04–0.05 cm−1 in most spectral regions. Performance of the spectrometers is illustrated by reproductions of the actual recorded spectra of water vapor at 1600, 300, and 200–55 cm−1, of ethylene and ammonia at 950 cm−1, of benzene at 673 cm−1, and of carbon disulfide at 400 cm−1.

© 1957 Optical Society of America

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References

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  1. R. C. Lord and T. K. McCubbin, J. Opt. Soc. Am. 45, 441 (1955).
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1955 (2)

1954 (1)

B. Stoicheff, Can. J. Phys. 32, 339 (1954).
[CrossRef]

1952 (2)

Benedict, Claassen, and Shaw, J. Research Natl. Bur. Standards 44, 91 (1952).
[CrossRef]

See Oetjen, Haynie, Ward, Hansler, Schauwecker, and Bell, J. Opt. Soc. Am. 42, 559 (1952).
[CrossRef]

1951 (1)

W. S. Benedict and E. K. Plyler, J. Research Natl. Bur. Standards 46, 246 (1951).
[CrossRef]

1945 (1)

Barnes, McDonald, Williams, and Kinnard, J. Appl. Phys. 16, 77 (1945).
[CrossRef]

1939 (1)

1938 (1)

H. M. Randall, Revs. Modern Phys. 10, 78 (1938).
[CrossRef]

1937 (1)

Randall, Dennison, Ginsburg, and Barker, Phys. Rev. 45, 160 (1937).
[CrossRef]

1932 (1)

F. A. Firestone, Rev. Sci. Instr. 3, 186 (1932).
[CrossRef]

1923 (2)

M. Czerny, Z. Physik 16, 321 (1923).
[CrossRef]

M. Czerny, Z. Physik 16, 321 (1923).
[CrossRef]

1896 (1)

H. Rubens, Verh. Deut. Ges. 15, 109 (1896).

Barker,

Randall, Dennison, Ginsburg, and Barker, Phys. Rev. 45, 160 (1937).
[CrossRef]

Barnes,

Barnes, McDonald, Williams, and Kinnard, J. Appl. Phys. 16, 77 (1945).
[CrossRef]

Bell,

Benedict,

Benedict, Claassen, and Shaw, J. Research Natl. Bur. Standards 44, 91 (1952).
[CrossRef]

Benedict, W. S.

W. S. Benedict and E. K. Plyler, J. Research Natl. Bur. Standards 46, 246 (1951).
[CrossRef]

Claassen,

Benedict, Claassen, and Shaw, J. Research Natl. Bur. Standards 44, 91 (1952).
[CrossRef]

Czerny, M.

M. Czerny, Z. Physik 16, 321 (1923).
[CrossRef]

M. Czerny, Z. Physik 16, 321 (1923).
[CrossRef]

Dennison,

Randall, Dennison, Ginsburg, and Barker, Phys. Rev. 45, 160 (1937).
[CrossRef]

Firestone, F. A.

F. A. Firestone, Rev. Sci. Instr. 3, 186 (1932).
[CrossRef]

Ginsburg,

Randall, Dennison, Ginsburg, and Barker, Phys. Rev. 45, 160 (1937).
[CrossRef]

Hansler,

Haynie,

Kinnard,

Barnes, McDonald, Williams, and Kinnard, J. Appl. Phys. 16, 77 (1945).
[CrossRef]

Lord, R. C.

McCubbin, T. K.

McDonald,

Barnes, McDonald, Williams, and Kinnard, J. Appl. Phys. 16, 77 (1945).
[CrossRef]

Oetjen,

Plyler, E. K.

E. K. Plyler, J. Opt. Soc. Am. 45, 102 (1955).
[CrossRef]

W. S. Benedict and E. K. Plyler, J. Research Natl. Bur. Standards 46, 246 (1951).
[CrossRef]

Unpublished private communication from E. K. Plyler.

Randall,

Randall, Dennison, Ginsburg, and Barker, Phys. Rev. 45, 160 (1937).
[CrossRef]

Randall, H. M.

H. M. Randall, Revs. Modern Phys. 10, 78 (1938).
[CrossRef]

Rubens, H.

H. Rubens, Verh. Deut. Ges. 15, 109 (1896).

Schauwecker,

Shaw,

Benedict, Claassen, and Shaw, J. Research Natl. Bur. Standards 44, 91 (1952).
[CrossRef]

Stoicheff, B.

B. Stoicheff, Can. J. Phys. 32, 339 (1954).
[CrossRef]

Strong, J.

Ward,

Williams,

Barnes, McDonald, Williams, and Kinnard, J. Appl. Phys. 16, 77 (1945).
[CrossRef]

Can. J. Phys. (1)

B. Stoicheff, Can. J. Phys. 32, 339 (1954).
[CrossRef]

J. Appl. Phys. (1)

Barnes, McDonald, Williams, and Kinnard, J. Appl. Phys. 16, 77 (1945).
[CrossRef]

J. Opt. Soc. Am. (4)

J. Research Natl. Bur. Standards (2)

Benedict, Claassen, and Shaw, J. Research Natl. Bur. Standards 44, 91 (1952).
[CrossRef]

W. S. Benedict and E. K. Plyler, J. Research Natl. Bur. Standards 46, 246 (1951).
[CrossRef]

Phys. Rev. (1)

Randall, Dennison, Ginsburg, and Barker, Phys. Rev. 45, 160 (1937).
[CrossRef]

Rev. Sci. Instr. (1)

F. A. Firestone, Rev. Sci. Instr. 3, 186 (1932).
[CrossRef]

Revs. Modern Phys. (1)

H. M. Randall, Revs. Modern Phys. 10, 78 (1938).
[CrossRef]

Verh. Deut. Ges. (1)

H. Rubens, Verh. Deut. Ges. 15, 109 (1896).

Z. Physik (2)

M. Czerny, Z. Physik 16, 321 (1923).
[CrossRef]

M. Czerny, Z. Physik 16, 321 (1923).
[CrossRef]

Other (2)

Handbook of Chemistry and Physics (Chemical Rubber Publishing Company, Cleveland, Ohio, 1953), various recent editions, e.g., 35th edition, pp. 2477–2637.

Unpublished private communication from E. K. Plyler.

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Figures (11)

Fig. 1
Fig. 1

Optical system for the medium-wavelength spectrometer.

Fig. 2
Fig. 2

Sketch of radiation choppers. (a) For the single-pass location. (b) For the double-pass location.

Fig. 3
Fig. 3

Mounting for Golay cell using crossed rest-strahlen plates.

Fig. 4
Fig. 4

Reflection and transmission curves for rest-strahlen plates, filters, and chopper materials. Sources of data: Measurements by the authors; Smithsonian Physical Tables; C. Schaeffer and F. Matossi, Das ultrarote Spektrum; Czerny and Roeder, Ergeb. exact. Naturw. 17, 70 (1938); W. Sinton and W. Davis, J. Opt. Soc. Am. 44, 503 (1954); T. K. McCubbin, Jr., and W. Sinton, ibid. 42, 113 (1952).

Fig. 5
Fig. 5

Spectrum of ammonia near 950 cm−1.

Fig. 6
Fig. 6

Spectrum of atmospheric water vapor, 1600 cm−1 band.

Fig. 7
Fig. 7

Spectrum of ethylene near 1000 cm−1.

Fig. 8
Fig. 8

Parallel absorption band of benzene at 673 cm−1.

Fig. 9
Fig. 9

Perpendicular absorption band of carbon disulfide at 396 cm−1.

Fig. 10
Fig. 10

Spectrum of atmospheric water vapor 230–235 cm−1.

Fig. 11
Fig. 11

Spectrum of atmospheric water vapor 55–200 cm−1 with 8 lines/mm grating; a and b, second order; c, d, e, first order. Reflection filters: a, NaCl; b, KCl (two plates); c, soot-coated rough aluminum; d, CsBr; e, KRS-5.

Tables (1)

Tables Icon

Table II a,b