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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 59, Iss. 10 — Oct. 1, 1969
  • pp: 1285–1287

Optimum Illumination Geometry for Laser Raman Spectroscopy

R. L. SCHWIESOW  »View Author Affiliations

JOSA, Vol. 59, Issue 10, pp. 1285-1287 (1969)

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A focal-length-to-aperture ratio (F/D) for the illuminating laser beam in a scattering experiment where the scattered light is collected at right angles to the laser beam has been determined. This ratio allows a maximum amount of scattered light to be collected and depends on illuminating wave number v= 1/λ, spectrograph slit height h and width w, and collecting-optics magnification M. M should be as large as practical. If (vh/14M)1/2 is less than (1/7) (h/w), the value of F/D for maximum collected scattered flux is (vh/14M)1/2. If (vh/14M)1/2 is greater than (1/7) (h/w), the collected scattered flux is maximum and constant for F/D over the range (vh/14M)1/2 to vw/2M.

R. L. SCHWIESOW, "Optimum Illumination Geometry for Laser Raman Spectroscopy," J. Opt. Soc. Am. 59, 1285-1287 (1969)

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  1. J. J. Barrett and N. I. Adams, III, J. Opt. Soc. Am. 58, 311 (1968).
  2. G. B. Benedek and K. Fritsch, Phys. Rev. 149, 647 (1966).
  3. See for example, J. Rud Nielsen, J. Opt. Soc. Am. 37, 494 (1947).
  4. 4 M. Born and E. Wolf, Principles of Optics (Pergamon Press, Inc., London, 1965), 3rd ed., pp. 436–444.
  5. A. L. Buck, Proc. IEEE 55, 448 (1967).
  6. H. H. Claassen, H. Selig, and J. Shamir, Appl. Spec. 23, 8 (1969).

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