Abstract

When spectrophotometry is conducted in the presence of unavoidable stray radiation, the usual expression for the absorbance [A=log(100/T)] becomes log[(100−k)/(Tk)], where T is the percent transmittance (100I/I0) and k is the percent stray radiation. To meet the demands of routine infra-red spectrophotometry in the 15–22μ-region, a table of values of this function was prepared for 1<T<99 and 0.5<k<20. The calculation of these values was performed by punched card machines.

© 1950 Optical Society of America

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References

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  1. Hawes, Cary, Beckman, Madsen, Hare, and Stickney, “A direct transmittancy recording infrared spectrophotometer,” presented before the Symposium on Molecular Structure and Spectroscopy, June 17, 1949, at Columbus, Ohio.
  2. E. K. Plyler, J. Opt. Soc. Am. 37, 746 (1947).
    [Crossref]
  3. Brattain, Rassmussen, and Cravath, J. App. Phys. 14, 418 (1943).
    [Crossref]
  4. Fry, Nusbaum, and Randall, J. App. Phys. 17, 158 (1946).
  5. J. R. Nielsen and Don C. Smith, Ind. Eng. Chem.Anal. Ed. 15, 609 (1943).

1947 (1)

1946 (1)

Fry, Nusbaum, and Randall, J. App. Phys. 17, 158 (1946).

1943 (2)

J. R. Nielsen and Don C. Smith, Ind. Eng. Chem.Anal. Ed. 15, 609 (1943).

Brattain, Rassmussen, and Cravath, J. App. Phys. 14, 418 (1943).
[Crossref]

Beckman,

Hawes, Cary, Beckman, Madsen, Hare, and Stickney, “A direct transmittancy recording infrared spectrophotometer,” presented before the Symposium on Molecular Structure and Spectroscopy, June 17, 1949, at Columbus, Ohio.

Brattain,

Brattain, Rassmussen, and Cravath, J. App. Phys. 14, 418 (1943).
[Crossref]

Cary,

Hawes, Cary, Beckman, Madsen, Hare, and Stickney, “A direct transmittancy recording infrared spectrophotometer,” presented before the Symposium on Molecular Structure and Spectroscopy, June 17, 1949, at Columbus, Ohio.

Cravath,

Brattain, Rassmussen, and Cravath, J. App. Phys. 14, 418 (1943).
[Crossref]

Fry,

Fry, Nusbaum, and Randall, J. App. Phys. 17, 158 (1946).

Hare,

Hawes, Cary, Beckman, Madsen, Hare, and Stickney, “A direct transmittancy recording infrared spectrophotometer,” presented before the Symposium on Molecular Structure and Spectroscopy, June 17, 1949, at Columbus, Ohio.

Hawes,

Hawes, Cary, Beckman, Madsen, Hare, and Stickney, “A direct transmittancy recording infrared spectrophotometer,” presented before the Symposium on Molecular Structure and Spectroscopy, June 17, 1949, at Columbus, Ohio.

Madsen,

Hawes, Cary, Beckman, Madsen, Hare, and Stickney, “A direct transmittancy recording infrared spectrophotometer,” presented before the Symposium on Molecular Structure and Spectroscopy, June 17, 1949, at Columbus, Ohio.

Nielsen, J. R.

J. R. Nielsen and Don C. Smith, Ind. Eng. Chem.Anal. Ed. 15, 609 (1943).

Nusbaum,

Fry, Nusbaum, and Randall, J. App. Phys. 17, 158 (1946).

Plyler, E. K.

Randall,

Fry, Nusbaum, and Randall, J. App. Phys. 17, 158 (1946).

Rassmussen,

Brattain, Rassmussen, and Cravath, J. App. Phys. 14, 418 (1943).
[Crossref]

Smith, Don C.

J. R. Nielsen and Don C. Smith, Ind. Eng. Chem.Anal. Ed. 15, 609 (1943).

Stickney,

Hawes, Cary, Beckman, Madsen, Hare, and Stickney, “A direct transmittancy recording infrared spectrophotometer,” presented before the Symposium on Molecular Structure and Spectroscopy, June 17, 1949, at Columbus, Ohio.

Ind. Eng. Chem. (1)

J. R. Nielsen and Don C. Smith, Ind. Eng. Chem.Anal. Ed. 15, 609 (1943).

J. App. Phys. (2)

Brattain, Rassmussen, and Cravath, J. App. Phys. 14, 418 (1943).
[Crossref]

Fry, Nusbaum, and Randall, J. App. Phys. 17, 158 (1946).

J. Opt. Soc. Am. (1)

Other (1)

Hawes, Cary, Beckman, Madsen, Hare, and Stickney, “A direct transmittancy recording infrared spectrophotometer,” presented before the Symposium on Molecular Structure and Spectroscopy, June 17, 1949, at Columbus, Ohio.

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Tables (1)

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Table I Transmittance-absorbance conversion table for use in presence of stray radiation. A=log[(100−k)/(Tk)].