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:
Jan. 17, 2012
Filed:
Dec. 23, 2008
Hitoshi Ishizawa, Kawasaki, JP;
Shunsuke Niisaka, Fujisawa, JP;
Hitoshi Ishizawa, Kawasaki, JP;
Shunsuke Niisaka, Fujisawa, JP;
Nikon Corporation, Tokyo, JP;
Abstract
Optical multi-layer thin film comprises: an outermost layer stacked above an optical surface of an optical substrate having a lower refractive index than the optical substrate; and at least a certain refractive index layer disposed between the optical substrate and the outermost layer, and having a refractive index adjustable in a predetermined range higher than that of the outermost layer. The outermost layer is formed by a wet film-formation method using: low-refractive-index fine particles made of a low-refractive-index material; and a first binder, and the certain refractive index layer is formed by a wet film-formation method using: high-refractive-index fine particles made of a high-refractive-index material; and a second binder which has a refractive index different from that of the high-refractive-index material.