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. 23, 2013
Filed:
May. 25, 2010
Satomi Suzuki, Minami-ashigara, JP;
Hideki Kaneiwa, Minami-ashigara, JP;
Ichiro Amimori, Minami-ashigara, JP;
Kouki Takahashi, Minami-ashigara, JP;
Satomi Suzuki, Minami-ashigara, JP;
Hideki Kaneiwa, Minami-ashigara, JP;
Ichiro Amimori, Minami-ashigara, JP;
Kouki Takahashi, Minami-ashigara, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
A viewer for authenticating a birefringent pattern having at least two regions having a different birefringence from each other, wherein the viewer contains a polarizing plate and at least one optically anisotropic layer laminated on the polarizing plate, a front retardation of the at least one optically anisotropic layer is 5 nm or more and the total of the front retardation of the at least one optically anisotropic layer and a maximum value of front retardation of the birefringent pattern is greater than λ/2.