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:
Sep. 23, 2014
Filed:
Oct. 26, 2012
Hoya Corporation, Tokyo, JP;
Shuichiro Kawagishi, Shinjuku-ku, JP;
Teruo Yamashita, Shinjuku-ku, JP;
Hoya Corporation, Tokyo, JP;
Abstract
An antireflection film, including an optical element, formed on an optical surface of an optical member and preventing reflection of a light beam incident on the optical surface. It has a maximum reflectance Pin a first wavelength region and a maximum reflectance Pin a second wavelength region at a wavelength side longer than the first wavelength region, and satisfies a relation of P>P, as a spectral reflectance property when a light beam is incident on the optical surface at a 0 degree incident angle. It also shifts a wavelength range where the reflectance is a specific value or less, to a wavelength longer than the second wavelength region, the reflectance in the second wavelength region decreases, and the reflectance in the first wavelength region increases so that a luminance difference is small between a ghost in the first wavelength region and the second wavelength region.