Title:
OPTICAL ELEMENT, IMAGE WAVEGUIDE METHOD, HEAD-MOUNTED DISPLAY APPARATUS AND DIFFRACTION TYPE WAVEGUIDE DISPLAY
Document Type and Number:
WIPO Patent Application WO/2022/104776
Kind Code:
A1
Abstract:
An optical element (120), comprising: a waveguide substrate (121), a first optical film structure (122), a second optical film structure (123) and a sub-wavelength nanostructure (124). The waveguide substrate (121) is provided with a first side (121A) and a second side (121B) opposite each other, an incident surface (121I) and an emergent surface, and is configured in such a way that an image light beam is enabled to enter the interior of the substrate through the incident surface (121I), be transmitted in a total reflection manner between the first side (121A) and the second side (121B) of the waveguide substrate (121), and be emergent from the emergent surface after being reflected once or multiple times. The first optical film structure (122) and the second optical film structure (123) are respectively provided on the first side (121A) and the second side (121B) of the waveguide substrate (121). The sub-wavelength nanostructure (124) is provided on the first side (121A) of the waveguide substrate (121). The sub-wavelength nanostructure (124) is configured to receive and diffract the image light beam, and to couple the image light beam to the waveguide substrate (121). The first optical film structure (122) and the second optical film structure (123) are configured to reflect the part of the image light beam whose incident angle within the waveguide substrate (121) is smaller than a total reflection critical angle of the waveguide substrate (121).
Inventors:
LIN KUO-FENG (CN)
LU HUI-WEN (CN)
LIN WEI-CHEN (CN)
HSUEH HUI-CHING (CN)
LU HUI-WEN (CN)
LIN WEI-CHEN (CN)
HSUEH HUI-CHING (CN)
Application Number:
PCT/CN2020/130821
Publication Date:
May 27, 2022
Filing Date:
November 23, 2020
Export Citation:
Assignee:
RADIANT OPTO ELECTRONICS SUZHOU CO LTD (CN)
RADIANT OPTO ELECTRONICS CORP (CN)
RADIANT OPTO ELECTRONICS CORP (CN)
International Classes:
G02B27/01
Foreign References:
| CN108431640A | 2018-08-21 | |||
| CN110352377A | 2019-10-18 | |||
| CN109154720A | 2019-01-04 | |||
| CN106773046A | 2017-05-31 | |||
| US20190056593A1 | 2019-02-21 |
Attorney, Agent or Firm:
BEIJING EAST IP LTD. (CN)
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