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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 23, Iss. 16 — Aug. 15, 1984
  • pp: 2770–2773

Broadband gradient-index antireflection coating for ZnSe

Haluk Sankur and W. H. Southwell  »View Author Affiliations


Applied Optics, Vol. 23, Issue 16, pp. 2770-2773 (1984)
http://dx.doi.org/10.1364/AO.23.002770


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Abstract

A gradient-index antireflection coating spanning the 0.6–12.6-μm wavelength range for a ZnSe substrate was designed, fabricated, and tested. The index profile used was a fifth-order polynominal that smoothly matches the substrate. The coating was fabricated using a discrete layer approximation for the gradient-index design using ZnSe and CaF2 deposited by laser-assisted evaporation. Total thickness of the coating was 3 μm. Transmission measurements show good agreement with calculated performance. Reflectivity per surface is <3% (compared with 17% for uncoated ZnSe) in the wavelength band encompassing 4.5 octaves from 0.6 to 12.6 μm.

© 1984 Optical Society of America

History
Original Manuscript: February 18, 1984
Published: August 15, 1984

Citation
Haluk Sankur and W. H. Southwell, "Broadband gradient-index antireflection coating for ZnSe," Appl. Opt. 23, 2770-2773 (1984)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-23-16-2770

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