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Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
October 13, 2015
0Patent Application Number
135528300
Date Filed
July 19, 2012
0Patent Citations Received
Patent Primary Examiner
Patent abstract
The optical element of the present invention has an anti-reflection film formed on a substrate. Here, the anti-reflection film comprises a first layer formed on the substrate; a second layer formed on the first layer and consisting of a material different from that of the first layer; and a third layer formed on the second layer and consisting of a concave-convex structure. Also, the third layer has three regions of which a refractive index for each thickness changes at a constant rate by continuously changing the space filling factor of the concave-convex structure.
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