The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 07, 1994
Filed:
Apr. 23, 1992
Atsushi Takamatsu, Mie, JP;
Kensuke Makita, Mie, JP;
Central Glass Company, Limited, Ube, JP;
Abstract
The invention relates to a transparent coating on a transparent glass pane which may be a laminated glass pane such as an automobile windshield. The invention provides a two-layer coating made up of a first oxide film, e.g. a TiO.sub.2 -SiO.sub.2 mixed oxide film, which is in contact with the glass pane and has a thickness of 70-100 nm and a refractive index of 1.80-1.90 and an outer second oxide film, e.g. a SiO.sub.2 film, which has a thickness of 110-130 nm and a refractive index of 1.40-1.50. With respect to visible light obliquely incident on the coating side of the glass pane at an angle of 50-70 degrees with the normal, the reflectance of the coated glass pane becomes lower than that of the glass pane without coating by 4.5-6.5%. To reduce the reflectance of perpendicularly incident light the two-layer coating can be modified into a three-layer coating by interposing another oxide film, e.g. a TiO.sub.2 film, having a thickness of 130-160 nm and a refractive index of 2.05-2.30 between the above described first and second oxide films. The three-layer coating is nearly equivalent to the two-layer coating in the ability to reduce the reflectance of obliquely incident light.