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. 08, 2015
Filed:
Dec. 06, 2013
Panasonic Corporation, Osaka, JP;
Kazuhiro Yamada, Osaka, JP;
Yosuke Asai, Osaka, JP;
Hiroshi Yamaguchi, Osaka, JP;
Takashi Yamada, Osaka, JP;
Abstract
An optical filmincludes a sheet-shaped base material; an information pattern including a plurality of marksprovided on one surface of the base materialand representing information regarding a position thereof on the optical film; and a sheet memberlaminated on the surface of the base materialon which the information pattern is provided, so as to fill spaces between the plurality of marks. When visible light having a wavelength of 700 nm is transmitted through the information pattern in a thickness direction of the information pattern, a phase difference between light transmitted through each markand light transmitted through the sheet memberbetween the marksis equal to or less than Π/6.