Abstract

We show that room-temperature, crystalline quartz is a useful material for a beam splitter for spectroscopy in the far infrared, ∼60-µm wavelength and longer. We compare such a beam splitter with the traditional far-infrared candidates: Mylar, polarizing, and lamellar beam splitters.

© 1997 Optical Society of America

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References

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  1. R. J. Bell, Introductory Fourier Transform Spectroscopy, 1st ed. (Academic, New York, 1972), Chap. 1, p. 1.
  2. W. H. Steel, Interferometry, 2nd ed. (Cambridge U. Press, Cambridge, England, 1983), Chap. 1, p. 1.
  3. L. C. Robinson, Physical Principles of Far-Infrared Radiation, 1st ed. (Academic, New York, 1973), Chap. 3, p. 140.
  4. R. A. Smith, F. E. Jones, R. P. Chasmar, The Detection and Measurement of Infra-Red Radiation, 2nd ed. (Oxford U. Press, Oxford, England, 1968), Chap. 11, p. 443.
  5. Ref. 1, Chap. 9, pp. 109–120.
  6. D. H. Martin, “Polarizing (Martin-Puplett) interferometric spectrometer for the near- and submillimeter spectra,” in Infrared and Millimeter Waves, Vol. 6 (Plenum, New York, 1982), p. 65.
  7. Ref. 3, Chap. 3, pp. 147–149.
  8. Ref. 3, Chap. 3, pp. 94–103.
  9. E. V. Loewenstein, D. R. Smith, R. L. Morgan, “Optical Constants of Far Infrared Materials. 2. Crystalline Solids,” Appl. Opt. 12, 398–406 (1973).
    [CrossRef] [PubMed]
  10. Ref. 2, Chap. 13, p. 251.
  11. Ref. 1, Chap. 6, p. 66.
  12. Ref. 1, Chap. 9, p. 112.

1973 (1)

Bell, R. J.

R. J. Bell, Introductory Fourier Transform Spectroscopy, 1st ed. (Academic, New York, 1972), Chap. 1, p. 1.

Chasmar, R. P.

R. A. Smith, F. E. Jones, R. P. Chasmar, The Detection and Measurement of Infra-Red Radiation, 2nd ed. (Oxford U. Press, Oxford, England, 1968), Chap. 11, p. 443.

Jones, F. E.

R. A. Smith, F. E. Jones, R. P. Chasmar, The Detection and Measurement of Infra-Red Radiation, 2nd ed. (Oxford U. Press, Oxford, England, 1968), Chap. 11, p. 443.

Loewenstein, E. V.

Martin, D. H.

D. H. Martin, “Polarizing (Martin-Puplett) interferometric spectrometer for the near- and submillimeter spectra,” in Infrared and Millimeter Waves, Vol. 6 (Plenum, New York, 1982), p. 65.

Morgan, R. L.

Robinson, L. C.

L. C. Robinson, Physical Principles of Far-Infrared Radiation, 1st ed. (Academic, New York, 1973), Chap. 3, p. 140.

Smith, D. R.

Smith, R. A.

R. A. Smith, F. E. Jones, R. P. Chasmar, The Detection and Measurement of Infra-Red Radiation, 2nd ed. (Oxford U. Press, Oxford, England, 1968), Chap. 11, p. 443.

Steel, W. H.

W. H. Steel, Interferometry, 2nd ed. (Cambridge U. Press, Cambridge, England, 1983), Chap. 1, p. 1.

Appl. Opt. (1)

Other (11)

Ref. 2, Chap. 13, p. 251.

Ref. 1, Chap. 6, p. 66.

Ref. 1, Chap. 9, p. 112.

R. J. Bell, Introductory Fourier Transform Spectroscopy, 1st ed. (Academic, New York, 1972), Chap. 1, p. 1.

W. H. Steel, Interferometry, 2nd ed. (Cambridge U. Press, Cambridge, England, 1983), Chap. 1, p. 1.

L. C. Robinson, Physical Principles of Far-Infrared Radiation, 1st ed. (Academic, New York, 1973), Chap. 3, p. 140.

R. A. Smith, F. E. Jones, R. P. Chasmar, The Detection and Measurement of Infra-Red Radiation, 2nd ed. (Oxford U. Press, Oxford, England, 1968), Chap. 11, p. 443.

Ref. 1, Chap. 9, pp. 109–120.

D. H. Martin, “Polarizing (Martin-Puplett) interferometric spectrometer for the near- and submillimeter spectra,” in Infrared and Millimeter Waves, Vol. 6 (Plenum, New York, 1982), p. 65.

Ref. 3, Chap. 3, pp. 147–149.

Ref. 3, Chap. 3, pp. 94–103.

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Figures (6)

Fig. 1
Fig. 1

Optical layout of the source, FTS, and detector. No coatings are on the beam splitter or the compensator, but the surface used for splitting is designated by a bold curve for informational purposes.

Fig. 2
Fig. 2

Single interferogram with the quartz beam splitter, representing data over a 10-s interval.

Fig. 3
Fig. 3

Average (bold curve) and standard deviation (thin curve) of the Fourier transforms of 10 phase-corrected scans, with a Von Hann apodization and the quartz beam splitter.

Fig. 4
Fig. 4

Comparison of the 10-scan quartz average (bold curve) with the model spectrum (thin curve). Also shown is the extraordinary ray transmission (dashed curve) of 1.6 cm of crystalline quartz at room temperature.

Fig. 5
Fig. 5

Average (bold curve) and standard deviation (thin curve) of the Fourier transforms of 10 phase-corrected scans with a Von Hann apodization and the Mylar beam splitter.

Fig. 6
Fig. 6

Comparison of the 10-scan Mylar average (bold curve) with the model spectrum (thin curve).

Equations (2)

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f=2vσ
Δσ=1/2L,

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