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:
Dec. 02, 2025
Filed:
Aug. 04, 2021
Nitto Denko Corporation, Osaka, JP;
Kozo Nakamura, Osaka, JP;
Minoru Miyatake, Osaka, JP;
Yufeng Weng, Osaka, JP;
Kari Rinko, Helsinki, FI;
Shingo Matsumoto, Tokyo, JP;
NITTO DENKO CORPORATION, Osaka, JP;
Abstract
An optical incoupling element () provided in the form of a discrete item attachable on a lightguide () is provided, comprising a substrate (A) and at least one three-dimensionally formed optical surface (). The optical surface () is configured to incouple light incident thereto and to adjust direction of the incoupled light transmitted through an optical contact surface () established at an interface between the element substrate (A) and a lightguide medium () such, that the incoupled light acquires a propagation path through a lightguide medium () via a series of total internal reflections. The optical surface () may comprise at least on optical cavity pattern (). The element () is configured to receive light onto said at least one three-dimensionally formed optical surface () from a direction essentially parallel to a longitudinal plane of the planar lightguide (). A method for manufacturing the optical incoupling element (), related arrangement, optical unit () and uses are further provided.