Title:
LIGHT INCOUPLING ELEMENT, RELATED METHOD AND USES
Document Type and Number:
WIPO Patent Application WO/2022/030544
Kind Code:
A1
Abstract:
An optical incoupling element (100) provided in the form of a discrete item attachable on a lightguide (20) is provided, comprising a substrate (100A) and at least one three-dimensionally formed optical surface (104). The optical surface (104) is configured to incouple light incident thereto and to adjust direction of the incoupled light transmitted through an optical contact surface (107) established at an interface between the element substrate (100A) and a lightguide medium (20) such, that the incoupled light acquires a propagation path through a lightguide medium (20) via a series of total internal reflections. The optical surface (104) may comprise at least on optical cavity pattern (101). The element (100) is configured to receive light onto said at least one three-dimensionally formed optical surface (104) from a direction essentially parallel to a longitudinal plane of the planar lightguide (20). A method for manufacturing the optical incoupling element (100), related arrangement, optical unit (250) and uses are further provided.
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Inventors:
NAKAMURA KOZO (JP)
MIYATAKE MINORU (JP)
WENG YUFENG (JP)
RINKO KARI (FI)
MATSUMOTO SHINGO (JP)
MIYATAKE MINORU (JP)
WENG YUFENG (JP)
RINKO KARI (FI)
MATSUMOTO SHINGO (JP)
Application Number:
PCT/JP2021/028955
Publication Date:
February 10, 2022
Filing Date:
August 04, 2021
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
F21S2/00; G02B6/00; F21V8/00
Domestic Patent References:
| WO2019182098A1 | 2019-09-26 |
Foreign References:
| JPH10111511A | 1998-04-28 | |||
| US20100061101A1 | 2010-03-11 | |||
| JP2017107174A | 2017-06-15 | |||
| CN202813209U | 2013-03-20 |
Attorney, Agent or Firm:
OKUDA Seiji (JP)
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