Graded-index AR coatings for large angles of inclination

J. H. Simmons, S. J. Pagano, L. K. Downie, Barrett G Potter, C. J. Simmons, E. N. Boulos, M. F. Best

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Antireflective coatings consisting of a single layer of glass with a graded variation in refractive index offer advantages over multi-layer coatings. These include a weaker dependence on angle of incidence at large angles and a flatter response to different wavelenghts over the visible. Consequently, graded-index films are desirable in automotive applications where colorless coatings are required. A sol-gel process is presented for the formation of a graded-index coating of MgOSiO2 with in-diffused fluorine. Refractive index variations over a range 1.46-1.40 are achieved over a few hundred micrometers. A theoretical analysis of the angular and wavelength dependence of the reflectivity of uncoated, single-layer coated, triple-layer coated and graded-index-layer coated samples was performed and compared with experimentally derived films. Good agreement between model and experiment was observed.

Original languageEnglish (US)
Pages (from-to)166-175
Number of pages10
JournalJournal of Non-Crystalline Solids
Volume178
Issue numberC
DOIs
StatePublished - Nov 3 1994
Externally publishedYes

Fingerprint

inclination
coatings
Coatings
Refractive index
Fluorine
refractivity
Sol-gel process
sol-gel processes
fluorine
micrometers
Glass
Wavelength
incidence
reflectance
glass
wavelengths
Experiments

ASJC Scopus subject areas

  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials

Cite this

Simmons, J. H., Pagano, S. J., Downie, L. K., Potter, B. G., Simmons, C. J., Boulos, E. N., & Best, M. F. (1994). Graded-index AR coatings for large angles of inclination. Journal of Non-Crystalline Solids, 178(C), 166-175. https://doi.org/10.1016/0022-3093(94)90281-X

Graded-index AR coatings for large angles of inclination. / Simmons, J. H.; Pagano, S. J.; Downie, L. K.; Potter, Barrett G; Simmons, C. J.; Boulos, E. N.; Best, M. F.

In: Journal of Non-Crystalline Solids, Vol. 178, No. C, 03.11.1994, p. 166-175.

Research output: Contribution to journalArticle

Simmons, JH, Pagano, SJ, Downie, LK, Potter, BG, Simmons, CJ, Boulos, EN & Best, MF 1994, 'Graded-index AR coatings for large angles of inclination', Journal of Non-Crystalline Solids, vol. 178, no. C, pp. 166-175. https://doi.org/10.1016/0022-3093(94)90281-X
Simmons, J. H. ; Pagano, S. J. ; Downie, L. K. ; Potter, Barrett G ; Simmons, C. J. ; Boulos, E. N. ; Best, M. F. / Graded-index AR coatings for large angles of inclination. In: Journal of Non-Crystalline Solids. 1994 ; Vol. 178, No. C. pp. 166-175.
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