OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 7, Iss. 4 — Apr. 1, 1968
  • pp: 589–598

A Double Beam, High Resolution Spectrometer for the Far Infrared

T. M. Hard and R. C. Lord  »View Author Affiliations


Applied Optics, Vol. 7, Issue 4, pp. 589-598 (1968)
http://dx.doi.org/10.1364/AO.7.000589


View Full Text Article

Enhanced HTML    Acrobat PDF (1742 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

A far ir spectrometer has been constructed with an Ebert-Fastie monochromator of 1.8-m focal length plane gratings 19 cm × 13 cm, and slit height of 10 cm. The source optics of the evacuable instrument are double beam, with an electronic system of recording the ratio of the radiant powers in each beam. The instrument has been used thus far over the range 20–300 cm−1 and the resolution achieved with the four gratings of 2 lines/mm, 4 lines/mm, 10 lines/mm, and 30 lines/mm varies from 0.1 cm−1 to about 0.4 cm−1, depending on the grating angle. The combinations of reflection and transmission filters used to eliminate higher orders reduce unwanted radiation to 1% or less in most ranges, though at a few wave-numbers it may be as large as 5%. A commercial bolometer of gallium-doped germanium cooled with liquid helium serves as the detector. Details of the operation of the instrument are given, and the results obtained are illustrated with the spectra of gaseous polyatomic molecules.

© 1968 Optical Society of America

History
Original Manuscript: November 24, 1967
Published: April 1, 1968

Citation
T. M. Hard and R. C. Lord, "A Double Beam, High Resolution Spectrometer for the Far Infrared," Appl. Opt. 7, 589-598 (1968)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-7-4-589


Sort:  Author  |  Year  |  Journal  |  Reset  

References

  1. W. G. Fastie, J. Opt. Soc. Amer. 42, 647 (1952); J. Opt. Soc. Amer. 48, 106 (1958). [CrossRef]
  2. See, for example, H. Yoshinaga, Jap. J. Appl. Phys. 4, Suppl. 1, 420 (1965).
  3. F. J. Low, J. Opt. Soc. Amer. 51, 1300 (1961). [CrossRef]
  4. J. U. White, J. Opt. Soc. Amer. 32, 285 (1942). [CrossRef]
  5. R. G. Schmitt, R. K. Brehm, Appl. Opt. 5, 1111 (1966). [CrossRef] [PubMed]
  6. J. Strong, J. Opt. Soc. Amer. 39, 360 (1949).
  7. H. W. Randall, Rev. Mod. Phys. 10, 78 (1938). [CrossRef]
  8. R. C. Lord, T. K. McCubbin, J. Opt. Soc. Amer. 47, 689 (1957). [CrossRef]
  9. G. R. Harrison, MIT Wavelength Tables (Technology Press, Cambridge, Massachusetts, 1939). The refractive index of air was taken as 1.0002772 at 5461 Å.
  10. H. M. Mould, W. C. Price, G. R. Wilkinson, unpublished communication to Commission on Molecular Structure and Spectroscopy, IUPAC. Compare Spectrochim. Acta16, 479 (1960). [CrossRef]
  11. K. N. Rao, R. V. deVore, E. K. Plyler, J. Res. Nat. Bur. Stand. 67A, 351 (1963). [CrossRef]
  12. R. T. Hall, J. M. Dowling, J. Chem. Phys. 47, 2454 (1967). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited