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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 55, Iss. 4 — Apr. 1, 1965
  • pp: 392–395

Reflecting Optics for Calibration of Spectroradiometers

R. W. PATCH  »View Author Affiliations

JOSA, Vol. 55, Issue 4, pp. 392-395 (1965)

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The requirements are given for absolute calibration of a spectroradiometer by means of an extended standard source. In some cases the extended source may be used without auxiliary optics, but in many cases a concave mirror is necessary or desirable. For such a mirror, a relation between incident and reflected steradiancy is derived. Brandenberg’s focusing relations for a concave spherical mirror are extended and applied to four practical cases, and it is shown that no loss in accuracy of calibration will result from the use of such mirrors provided that the source and the mirror are large enough. Experimental verification is given.

R. W. PATCH, "Reflecting Optics for Calibration of Spectroradiometers," J. Opt. Soc. Am. 55, 392-395 (1965)

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  1. R. W. Patch, J. Quant. Spectry. Radiative Transfer (to be published).
  2. R. E. Danielson, J. E. Gaustad, M. Schwarzschild, H. F. Weaver, and N. J. Woolf, Astron. J. 69, 344 (1964).
  3. M. G. Dreyfus and D. T. Hilleary, Aerospace Engr. 21, 28 (1962).
  4. R. Stair, R. G. Johnston, and E. W. Halbach, J. Res. Natl. Bur. Std. (U.S.) 64A, 291 (1960).
  5. R. W. Patch, Ph.D. thesis, California Institute of Technology, Pasadena (1964), pp. 173–175.
  6. W. M. Brandenberg, J. Opt. Soc. Am. 54, 1235 (1964).
  7. S. Chandrasekhar, Radiative Transfer (Dover Publications, New York, 1960), p. 9 (Chandrasekhar uses Iv to represent Bv).
  8. H. E. Bennett and W. F. Koehler, J. Opt. Soc. Am. 50, 1 (1960).

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