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:
Aug. 02, 2016
Filed:
Jan. 11, 2013
Nippon Electric Glass Co., Ltd., Otsu-shi, Shiga, JP;
Masaaki Kadomi, Otsu, JP;
Hirokazu Tanaka, Otsu, JP;
Masanori Wada, Otsu, JP;
Takasi Akimoto, Nagahama, JP;
NIPPON ELECTRIC GLASS CO., LTD., Shiga, JP;
Abstract
An object of the present invention is to provide a liquid-crystal lens having excellent imaging performance. A liquid-crystal lens () according to the present invention includes a first liquid-crystal layer (), a second liquid-crystal layer (), a third liquid-crystal layer (), and a fourth liquid-crystal layer () which are arranged in this order along an optical axis (C). The first liquid-crystal layer () and the second liquid-crystal layer () are 90° different in alignment direction from each other in a plane perpendicular to the optical axis (C). The first liquid-crystal layer () and the fourth liquid-crystal layer () are 180° different in alignment direction from each other in the plane perpendicular to the optical axis (C). The second liquid-crystal layer () and the third liquid-crystal layer () are 180° different in alignment direction from each other in the plane perpendicular to the optical axis (C).