Abstract

A design is presented for a double-beam infra-red analyzer that utilizes the chopped-light principle. The advantages of this instrument are low rate of drift at high sensitivities, freedom from the effects of ambient temperatures, and general ruggedness, all of which make the system adaptable to plant analytical and control problems. The receiving system consists of a thermistor bolometer and tuned amplifier. Performance data are given for the butadiene recycle impurity system of a GR-S synthetic rubber plant stream.

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References

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  1. H. Schmick, U. S. Patent No. 1,758,088.
  2. N. Wright, and L. W. Hercher, J. Opt. Soc. Am. 36, 198 (1946).
  3. W. G. Fastie and A. H. Pfund, J. Opt. Soc. Am. 37, 762 (1947).
  4. National Bureau of Standards Report No. 46–06–09, June 14, 1946.
  5. C. E. Mendenhall, Astrophys. J. 33, 91 (1911).
  6. A. G. Worthing, Phys. Rev. 25, 846 (1925).
  7. W. H. Brattain and J. A. Becker, "Thermistor bolometers," presented at the Winter Meeting of the Optical Society of America, March 7–9, 1946, Cleveland, Ohio.
  8. L. W. Gildart, "An investigation of the comparative merits of the Thermistor-a.c. amplifier system and the thermocouple-galvanometer system," Final report submitted by E. F. Barker, Technical Representative, N.D.R.C. Contract OEMsr-1132, University of Michigan, Ann Arbor, Michigan—PB 27342.

Becker, J. A.

W. H. Brattain and J. A. Becker, "Thermistor bolometers," presented at the Winter Meeting of the Optical Society of America, March 7–9, 1946, Cleveland, Ohio.

Brattain, W. H.

W. H. Brattain and J. A. Becker, "Thermistor bolometers," presented at the Winter Meeting of the Optical Society of America, March 7–9, 1946, Cleveland, Ohio.

Fastie, W. G.

W. G. Fastie and A. H. Pfund, J. Opt. Soc. Am. 37, 762 (1947).

Gildart, L. W.

L. W. Gildart, "An investigation of the comparative merits of the Thermistor-a.c. amplifier system and the thermocouple-galvanometer system," Final report submitted by E. F. Barker, Technical Representative, N.D.R.C. Contract OEMsr-1132, University of Michigan, Ann Arbor, Michigan—PB 27342.

Hercher, L. W.

N. Wright, and L. W. Hercher, J. Opt. Soc. Am. 36, 198 (1946).

Mendenhall, C. E.

C. E. Mendenhall, Astrophys. J. 33, 91 (1911).

Pfund, A. H.

W. G. Fastie and A. H. Pfund, J. Opt. Soc. Am. 37, 762 (1947).

Schmick, H.

H. Schmick, U. S. Patent No. 1,758,088.

Worthing, A. G.

A. G. Worthing, Phys. Rev. 25, 846 (1925).

Wright, N.

N. Wright, and L. W. Hercher, J. Opt. Soc. Am. 36, 198 (1946).

Other

H. Schmick, U. S. Patent No. 1,758,088.

N. Wright, and L. W. Hercher, J. Opt. Soc. Am. 36, 198 (1946).

W. G. Fastie and A. H. Pfund, J. Opt. Soc. Am. 37, 762 (1947).

National Bureau of Standards Report No. 46–06–09, June 14, 1946.

C. E. Mendenhall, Astrophys. J. 33, 91 (1911).

A. G. Worthing, Phys. Rev. 25, 846 (1925).

W. H. Brattain and J. A. Becker, "Thermistor bolometers," presented at the Winter Meeting of the Optical Society of America, March 7–9, 1946, Cleveland, Ohio.

L. W. Gildart, "An investigation of the comparative merits of the Thermistor-a.c. amplifier system and the thermocouple-galvanometer system," Final report submitted by E. F. Barker, Technical Representative, N.D.R.C. Contract OEMsr-1132, University of Michigan, Ann Arbor, Michigan—PB 27342.

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