OSA's Digital Library

Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 37, Iss. 10 — Oct. 1, 1947
  • pp: 754–759

An Automatic Recording Infra-Red Spectrophotometer

W. S. BAIRD, H. M. O’BRYAN, GEORGE OGDEN, and DOROTHY LEE  »View Author Affiliations


JOSA, Vol. 37, Issue 10, pp. 754-759 (1947)
http://dx.doi.org/10.1364/JOSA.37.000754


View Full Text Article

Acrobat PDF (1001 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

An automatic recording spectrophotometer for the infrared is described, which employs a double-beam source, Littrow spectrometer, fast bolometer, and high speed pen- and drum-recording system. The sample and reference beams are alternately chopped at 10 cycles/sec. at the entrance slit to the spectrometer. The amplified a.c. signal on the bolometer is used to drive a variable comb diaphragm in the reference beam. The spectra are registered on a recorder by a pen mechanically linked to this comb.

The spectral region covered is between 2 microns and 16 microns with a sodium chloride prism. The range can be extended to about 26 microns by the use of a potassium bromide prism. The instrument is designed for high speed analytical work, producing permanently recorded spectrograms of gases, liquids, and solids on accurate charts at intervals of 18 minutes. Percent transmission is recorded with an accuracy of ±1 percent, and wave-length with an accuracy of ±0.025 micron. Records are reproducible to within ±1 percent transmission and ±0.01 micron.

Special features are its high recording speed, stability and freedom from drift with the “optical-null” principle, linearity and ease of operation.

Citation
W. S. BAIRD, H. M. O’BRYAN, GEORGE OGDEN, and DOROTHY LEE, "An Automatic Recording Infra-Red Spectrophotometer," J. Opt. Soc. Am. 37, 754-759 (1947)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-37-10-754


Sort:  Author  |  Journal  |  Reset

References

  1. J. D. Hardy and A. I. Ryer, Phys. Rev. 55, 1112 (1939).
  2. N. Wright and L. W. Herscher, "Double-beam, percent transmission recording infra-red spectrophotometer," J. Opt. Soc. Am. 37, 211 (1947).
  3. E. Lehrer, Zeits. f. tech. Physik 23, 169 (1942).
  4. Schaefer and Matossi, Das ultrarote Spectrum (J. Springer Verlag, Berlin, 1930), p. 47.

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