Method for the preparation of porous silica antireflection coatings varying in refractive index from 1. 22 to 1. 44

Journal Article · Thu Oct 01 04:00:00 EDT 1992 · Applied Optics; (United States)

DOI:https://doi.org/10.1364/AO.31.006145· OSTI ID:7039331

Thomas, I M ^[1]

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1. Lawrence Livermore National Laboratory, University of California, P.O. Box 5508, L-483, Livermore, California 94550 (United States)

Coatings of refractive index that vary between 1.22 and 1.44 were prepared from combinations of a colloidal silica suspension and a polysiloxane solution. The polysiloxane acted both as a binder and a filler for the colloidal silica particles. Increasing ratios gave coatings of lower porosity, hence higher refractive index, and better abrasion resistance. This variation in refractive index allowed high-efficiency quarter-wave antireflection coatings to be prepared on substrates whose index varied from 1.45 to 2.1. The laser damage thresholds of all the coatings were {lt}50 J/cm{sup 2} at a wavelength of 1.06 {mu}m with a 10-ns pulse length.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7039331
• Journal Information: Applied Optics; (United States), Journal Name: Applied Optics; (United States) Vol. 31:28; ISSN 0003-6935; ISSN APOPA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ANTIREFLECTION COATINGS
CHALCOGENIDES
CHEMICAL REACTIONS
COATINGS
DECOMPOSITION
HYDROLYSIS
LYSIS
MATERIALS
MECHANICAL PROPERTIES
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PHYSICAL RADIATION EFFECTS
POROUS MATERIALS
RADIATION EFFECTS
REFRACTIVE INDEX
SILICON COMPOUNDS
SILICON OXIDES
SOLVOLYSIS
SYNTHESIS
WEAR RESISTANCE