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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 7 — Mar. 1, 2003
  • pp: 1346–1351

Symmetrical periods in antireflective coatings for plastic optics

Ulrike Schulz, Uwe B. Schallenberg, and Norbert Kaiser  »View Author Affiliations


Applied Optics, Vol. 42, Issue 7, pp. 1346-1351 (2003)
http://dx.doi.org/10.1364/AO.42.001346


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Abstract

Plastic optical parts require antireflective as well as hard coatings. A novel design concept for coating plastics combines both functions. Symmetrical three-layer periods with a phase thickness of 3/2π are arranged in a multilayer to achieve a step-down refractive-index profile. It is shown mathematically that the equivalent index of symmetrical periods can be lower than the lowest refractive index of a material used in the design, if the phase thickness of the symmetrical period is set equal to 3/2π instead of the usual π/2. The straightforward application of the concept to the design of antireflection coatings in general is demonstrated by example.

© 2003 Optical Society of America

OCIS Codes
(310.1210) Thin films : Antireflection coatings
(310.1860) Thin films : Deposition and fabrication

History
Original Manuscript: July 31, 2002
Revised Manuscript: November 20, 2002
Published: March 1, 2003

Citation
Ulrike Schulz, Uwe B. Schallenberg, and Norbert Kaiser, "Symmetrical periods in antireflective coatings for plastic optics," Appl. Opt. 42, 1346-1351 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-7-1346

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