Title:
SHORT-FOCUS FOLDING OPTICAL SYSTEM AND VIRTUAL REALITY DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/071032
Kind Code:
A1
Abstract:
A short-focus folding optical system and a virtual reality display device. The short-focus folding optical system comprises: a display unit (10) and a light folding unit (20), wherein the display unit (10) is configured to emit image light (101) in a circularly polarized state to the light folding unit (20); the light folding unit (20) is configured to fold and propagate the image light (101) to a human eye (30); and the light folding unit (20) comprises a first lens (21), a second lens (22), a first quarter-wave plate (23), and a reflective polarizer (24). By means of the polarization characteristic of light, the image light (101) is reflected and refracted multiple times in the light folding unit (20); and by means of increasing the number of times of turn-back of the image light (101), the length of the optical system is reduced, and the number of used optical lenses can also be reduced, thereby achieving the advantages of a small volume, a light weight and a high resolution.
Inventors:
ZHANG XUEBING (CN)
PANG BIN (CN)
PANG BIN (CN)
Application Number:
PCT/CN2022/081707
Publication Date:
May 04, 2023
Filing Date:
March 18, 2022
Export Citation:
Assignee:
GUANGZHOU SHIYUAN ELECT TECH (CN)
International Classes:
G02B27/01
Foreign References:
| CN112352184A | 2021-02-09 | |||
| US20170357100A1 | 2017-12-14 | |||
| US20180088332A1 | 2018-03-29 | |||
| US20180039052A1 | 2018-02-08 | |||
| CN108957732A | 2018-12-07 |
Attorney, Agent or Firm:
GUANGZHOU JUNCY INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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