Back to results
US 5,847,876 AGranted
Fingerprint resistant anti-reflection coatings
AssigneeMcDonnell Douglas Corporation
InventorsRonald A. Ferrante, Rudolf H. Ott
Life of this patent
Estimating the term…
Abstract
Two-layer, thin film coating designs on glass substrates are described which reduce coated surface reflectance while inhibiting the visibility of fingerprints.
Claims8
A fingerprint-resistant two-layer anti-reflection coating for glass substrates consisting essentially of
- a. an upper thin film layer to be exposed to air, said layer having an index of refraction of from about 1.35 to about 1.46, formed to an optical thickness equal to a quarter wave at a pre-selected design wavelength in the range of about 450 to 550 nanometers;
- and
- b. a lower thin film layer to interface the glass substrate, said layer having an index of refraction of from about 1.60 to about 1.72, formed to an optical thickness equal to a half wave at a pre-selected design wavelength in the range of about 450 to 550 nanometers;
- whereby the reflectance of light from said fingerprint-resistant two-layer anti-reflection coating when applied to glass substrates is essentially the same in oil and air.
1 more element
Dependencies are inferred from the claim text.