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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 46, Iss. 8 — Mar. 10, 2007
  • pp: 1201–1204

Design of blocking filters of any narrow bandwidth

Ronald R. Willey  »View Author Affiliations

Applied Optics, Vol. 46, Issue 8, pp. 1201-1204 (2007)

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A design approach is described to achieve spectral blocking filters of any spectral width and optical density for narrow blocking bands. The ratio of the thickness of the high-index material to the low-index material in the layer pairs is adjusted to obtain the desired bandwidth in the first-harmonic reflection band. The number of layer pairs is adjusted to provide the required optical density. Equations are provided for estimating the ratios and number of layer pairs needed to achieve a given bandwidth and optical density. This approach can be useful for laser line blocking filters, night vision filters, and other general applications.

© 2007 Optical Society of America

OCIS Codes
(310.0310) Thin films : Thin films
(310.1620) Thin films : Interference coatings

Original Manuscript: August 4, 2006
Manuscript Accepted: October 23, 2006
Published: February 20, 2007

Virtual Issues
Vol. 2, Iss. 4 Virtual Journal for Biomedical Optics

Ronald R. Willey, "Design of blocking filters of any narrow bandwidth," Appl. Opt. 46, 1201-1204 (2007)

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  1. A. Thelen, Design of Optical Interference Coatings (McGraw-Hill, 1988), Chap. 7.
  2. R. R. Willey, Practical Design and Production of Optical Thin Films (Dekker, 2002), pp. 106-111.

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