Anti-reflection coating and optical member comprising same
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United States of America Patent
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Sep 22, 2020
Grant Date -
May 11, 2017
app pub date -
Jan 24, 2017
filing date -
Aug 23, 2013
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Abstract
An anti-reflection coating having an three-layer structure comprising first to third layers formed in this order on a substrate, the substrate having a refractive index of 1.6-1.9, the first layer having a refractive index of 1.37-1.57, the second layer having a refractive index of 1.75-2.5, and the third layer having a refractive index of 1.18-1.32, to light in a wavelength range of 550 nm; the third layer being formed by silica aerogel; and the first and second layers containing no Al2O3.
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