Title:
OPTICAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/182092
Kind Code:
A1
Abstract:
Provided is an optical device equipped with the function of in-coupling into a light guide. The optical device has a light-guide layer and an in-coupling optical system which is integrally provided with the light-guide layer and couples light from a light source to the incident edge of the light-guide layer. The in-coupling optical system has an optical element which is convex toward the incident edge, and an air cavity provided between the optical element and the incident edge.
Inventors:
RINKO KARI (FI)
Application Number:
PCT/JP2019/012011
Publication Date:
September 26, 2019
Filing Date:
March 22, 2019
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
F21S2/00
Foreign References:
JP2013161639A | 2013-08-19 | |||
JP2009199927A | 2009-09-03 | |||
JP2013161639A | 2013-08-19 | |||
US201862646461P | 2018-03-22 |
Other References:
See also references of EP 3770485A4
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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