Abstract

We propose a novel instrument for automobile exhaust analysis based on a Hadamard-transform spectrometer, which would be able to make accurate measurements of the concentration of several pollutants simultaneously, would be operated by unskilled personnel, and would complete a measurement scan in less than 1 sec.

© 1971 Optical Society of America

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References

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  1. F. Kneubuhl, Appl. Opt. 8, 505 (1969).
    [CrossRef] [PubMed]
  2. See, e.g., the ir spectrometer developed by G. C. Pimental for the 1969 Mars Mariner missions as described by C. E. Kohlhase et al., Astronaut. Aeronaut. 7, no. 7, 91 (July1969).
  3. L. Mertz, Transformation in Optics (Wiley, New York, 1965), especially Chaps. 1 & 2, pp. 1–79.
  4. A. R. Barringer, J. Opt. Soc. Amer. 60, SM-27 (1970).
  5. See, e.g., R. Briskman, J. M. Weinberg, Aerospace Medical Research Laboratories ReportAMRL-TR-66-236 (Aerospace Medical Research Laboratories, Aerospace Medical Division, U. S. Air Force Systems Command, Wright-Patterson Air Force Base, Ohio, February1967).
  6. J. A. Decker, M. O. Harwit, Appl. Opt. 7, 2205 (1968); Appl. Opt. 8, 2552 (1969); (to be published)(1971).
    [CrossRef] [PubMed]
  7. J. A. Decker, M. Harwit, U.S. Patent pending.
  8. For the individual spectra, see R. H. Pierson, A. N. Fletcher, E. St. C. Gantz, Anal. Chem. 28, 1218–1239 (1958); data for CO2, n-butane (typical of n-hexane) and CO are on p. 1224, for NO and NO2 on p. 1234, for SO2 on p. 1237, and for formaldehyde on p. 1229.
    [CrossRef]
  9. J. A. Decker, Appl. Opt. 9, 1392 (1970).
    [CrossRef] [PubMed]
  10. P. Fellgett, J. Phys. 28, Suppl. 3–4, C2-165 (1967).

1970 (2)

A. R. Barringer, J. Opt. Soc. Amer. 60, SM-27 (1970).

J. A. Decker, Appl. Opt. 9, 1392 (1970).
[CrossRef] [PubMed]

1969 (2)

F. Kneubuhl, Appl. Opt. 8, 505 (1969).
[CrossRef] [PubMed]

See, e.g., the ir spectrometer developed by G. C. Pimental for the 1969 Mars Mariner missions as described by C. E. Kohlhase et al., Astronaut. Aeronaut. 7, no. 7, 91 (July1969).

1968 (1)

1967 (1)

P. Fellgett, J. Phys. 28, Suppl. 3–4, C2-165 (1967).

1958 (1)

For the individual spectra, see R. H. Pierson, A. N. Fletcher, E. St. C. Gantz, Anal. Chem. 28, 1218–1239 (1958); data for CO2, n-butane (typical of n-hexane) and CO are on p. 1224, for NO and NO2 on p. 1234, for SO2 on p. 1237, and for formaldehyde on p. 1229.
[CrossRef]

Barringer, A. R.

A. R. Barringer, J. Opt. Soc. Amer. 60, SM-27 (1970).

Briskman, R.

See, e.g., R. Briskman, J. M. Weinberg, Aerospace Medical Research Laboratories ReportAMRL-TR-66-236 (Aerospace Medical Research Laboratories, Aerospace Medical Division, U. S. Air Force Systems Command, Wright-Patterson Air Force Base, Ohio, February1967).

Decker, J. A.

Fellgett, P.

P. Fellgett, J. Phys. 28, Suppl. 3–4, C2-165 (1967).

Fletcher, A. N.

For the individual spectra, see R. H. Pierson, A. N. Fletcher, E. St. C. Gantz, Anal. Chem. 28, 1218–1239 (1958); data for CO2, n-butane (typical of n-hexane) and CO are on p. 1224, for NO and NO2 on p. 1234, for SO2 on p. 1237, and for formaldehyde on p. 1229.
[CrossRef]

Gantz, E. St. C.

For the individual spectra, see R. H. Pierson, A. N. Fletcher, E. St. C. Gantz, Anal. Chem. 28, 1218–1239 (1958); data for CO2, n-butane (typical of n-hexane) and CO are on p. 1224, for NO and NO2 on p. 1234, for SO2 on p. 1237, and for formaldehyde on p. 1229.
[CrossRef]

Harwit, M.

J. A. Decker, M. Harwit, U.S. Patent pending.

Harwit, M. O.

Kneubuhl, F.

Kohlhase, C. E.

See, e.g., the ir spectrometer developed by G. C. Pimental for the 1969 Mars Mariner missions as described by C. E. Kohlhase et al., Astronaut. Aeronaut. 7, no. 7, 91 (July1969).

Mertz, L.

L. Mertz, Transformation in Optics (Wiley, New York, 1965), especially Chaps. 1 & 2, pp. 1–79.

Pierson, R. H.

For the individual spectra, see R. H. Pierson, A. N. Fletcher, E. St. C. Gantz, Anal. Chem. 28, 1218–1239 (1958); data for CO2, n-butane (typical of n-hexane) and CO are on p. 1224, for NO and NO2 on p. 1234, for SO2 on p. 1237, and for formaldehyde on p. 1229.
[CrossRef]

Weinberg, J. M.

See, e.g., R. Briskman, J. M. Weinberg, Aerospace Medical Research Laboratories ReportAMRL-TR-66-236 (Aerospace Medical Research Laboratories, Aerospace Medical Division, U. S. Air Force Systems Command, Wright-Patterson Air Force Base, Ohio, February1967).

Anal. Chem. (1)

For the individual spectra, see R. H. Pierson, A. N. Fletcher, E. St. C. Gantz, Anal. Chem. 28, 1218–1239 (1958); data for CO2, n-butane (typical of n-hexane) and CO are on p. 1224, for NO and NO2 on p. 1234, for SO2 on p. 1237, and for formaldehyde on p. 1229.
[CrossRef]

Appl. Opt. (3)

Astronaut. Aeronaut. (1)

See, e.g., the ir spectrometer developed by G. C. Pimental for the 1969 Mars Mariner missions as described by C. E. Kohlhase et al., Astronaut. Aeronaut. 7, no. 7, 91 (July1969).

J. Opt. Soc. Amer. (1)

A. R. Barringer, J. Opt. Soc. Amer. 60, SM-27 (1970).

J. Phys. (1)

P. Fellgett, J. Phys. 28, Suppl. 3–4, C2-165 (1967).

Other (3)

See, e.g., R. Briskman, J. M. Weinberg, Aerospace Medical Research Laboratories ReportAMRL-TR-66-236 (Aerospace Medical Research Laboratories, Aerospace Medical Division, U. S. Air Force Systems Command, Wright-Patterson Air Force Base, Ohio, February1967).

J. A. Decker, M. Harwit, U.S. Patent pending.

L. Mertz, Transformation in Optics (Wiley, New York, 1965), especially Chaps. 1 & 2, pp. 1–79.

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Figures (4)

Fig. 1
Fig. 1

Artist’s conception of Hadamard-transform (HTS) automobile exhaust-analysis spectrometer.

Fig. 2
Fig. 2

Schematic of typical HTS exhaust-analysis system.

Fig. 3
Fig. 3

Differential scanner detail.

Fig. 4
Fig. 4

Multiplex/interferometric/transform spectrometry logic (after Fellgett, Ref. 10).

Tables (1)

Tables Icon

Table I Possible Absorption/Reference Wavelengths for Typical Automobile Exhaust Constituents

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