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Applied Optics

Applied Optics


  • Vol. 12, Iss. 4 — Apr. 1, 1973
  • pp: 818–821

Varioilluminator (Subtractive Double Monochromator with Variable Bandpass)

F. R. Lipsett, G. Oblinsky, and S. Johnson  »View Author Affiliations

Applied Optics, Vol. 12, Issue 4, pp. 818-821 (1973)

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A varioilluminator is a double monochromator in which the dispersion in the second half of the instrument is subtractive rather than additive and in which the central slit can be opened very wide. The wavelength bandpass depends almost entirely upon the width of the central slit. The jaws of the central slit in the instrument described here were made independently variable, so that the long and short wavelength cutoffs could be independently selected. Quartz or glass prisms could be used, and bandpasses from about 15 Å to several hundred Å could be chosen.

© 1973 Optical Society of America

Original Manuscript: September 14, 1972
Published: April 1, 1973

F. R. Lipsett, G. Oblinsky, and S. Johnson, "Varioilluminator (Subtractive Double Monochromator with Variable Bandpass)," Appl. Opt. 12, 818-821 (1973)

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