Graded-index AR coatings for large angles of inclination

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

doi:10.1016/0022-3093(94)90281-X

Graded-index AR coatings for large angles of inclination

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

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

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 language	English (US)
Pages (from-to)	166-175
Number of pages	10
Journal	Journal of Non-Crystalline Solids
Volume	178
Issue number	C
DOIs	https://doi.org/10.1016/0022-3093(94)90281-X
State	Published - Nov 3 1994
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Materials Chemistry

Access to Document

10.1016/0022-3093(94)90281-X

Cite this

@article{12099ad8f80d4a0f8199b9f8f3586c52,

title = "Graded-index AR coatings for large angles of inclination",

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.",

author = "Simmons, \{J. H.\} and Pagano, \{S. J.\} and Downie, \{L. K.\} and Potter, \{B. G.\} and Simmons, \{C. J.\} and Boulos, \{E. N.\} and Best, \{M. F.\}",

year = "1994",

month = nov,

day = "3",

doi = "10.1016/0022-3093(94)90281-X",

language = "English (US)",

volume = "178",

pages = "166--175",

journal = "Journal of Non-Crystalline Solids",

issn = "0022-3093",

publisher = "Elsevier B.V.",

number = "C",

}

TY - JOUR

T1 - Graded-index AR coatings for large angles of inclination

AU - Simmons, J. H.

AU - Pagano, S. J.

AU - Downie, L. K.

AU - Potter, B. G.

AU - Simmons, C. J.

AU - Boulos, E. N.

AU - Best, M. F.

PY - 1994/11/3

Y1 - 1994/11/3

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/0028763387

UR - https://www.scopus.com/pages/publications/0028763387#tab=citedBy

U2 - 10.1016/0022-3093(94)90281-X

DO - 10.1016/0022-3093(94)90281-X

M3 - Article

AN - SCOPUS:0028763387

SN - 0022-3093

VL - 178

SP - 166

EP - 175

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

IS - C

ER -

Graded-index AR coatings for large angles of inclination

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this