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:
Jul. 18, 2017
Filed:
Jun. 30, 2014
Canon Kabushiki Kaisha, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An anti-reflection film includes first through ninth layers. Regarding light having a wavelength of 550 nm, where the refractive indexes of the first through ninth layers are nthrough nrespectively, the optical film thicknesses dthrough d(nm) respectively, and the maximum value of the difference in the refractive index between adjoining layers for layersthroughis Δn, the following conditions are satisfied.1.60≦n1≦1.70, 15 nm≦d1≦140 nm,2.00≦n2≦2.40, 20 nm≦d2≦120 nm,1.60≦n3≦1.70, 11 nm≦d3≦70 nm,2.00≦n4≦2.40, 20 nm≦d4≦165 nm,1.60≦n5≦1.70, 15 nm≦d5≦45 nm,2.00≦n6≦2.40, 90 nm≦d6≦175 nm,1.60≦n7≦1.70, 50 nm≦d7≦110 nm,2.00≦n8≦2.40, 20 nm≦d8≦50 nm,1.20≦n9≦1.28, 140 nm≦d9≦160 nm, and0.40≦Δn≦0.67.