Title:
OCULAR OPTICAL SYSTEM HAVING LARGE FIELD OF VIEW, AND HEAD-MOUNTED DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/141385
Kind Code:
A1
Abstract:
An ocular optical system having a large field of view, and a head-mounted display device. The ocular optical system sequentially comprises a first lens group (D1), a second lens group (D2) and a third lens group (D3) that are coaxially arranged along an optical axis from a human eye observation side to a micro image display (IMG), and the effective focal lengths of the first lens group (D1), the second lens group (D2) and the third lens group (D3) form a positive, negative and positive combination; the first lens group (D1) comprises a first lens (L1) proximate to the human eye side and a second lens (L2) distant from the human eye side; the first lens group (D1) comprises at least two Fresnel optical surfaces; the first lens (L1) comprises at least one Fresnel optical surface; the second lens group (D2) comprises a third lens (L3) adjacent to the first lens group (D1); the third lens (L3) is a negative lens; the third lens group (D3) comprises a fourth lens (L4) adjacent to the second lens group (D2); the fourth lens (L4) is a positive lens. The ocular optical system greatly reduces the weight of the optical system while achieving the advantages of a large field of view, high image quality, low distortion, small curvature of field and small volume index, and the system aberration is greatly eliminated.
Inventors:
CAO HONGPENG (CN)
GUO JIANFEI (CN)
PENG HUAJUN (CN)
GUO JIANFEI (CN)
PENG HUAJUN (CN)
Application Number:
PCT/CN2020/142072
Publication Date:
July 07, 2022
Filing Date:
December 31, 2020
Export Citation:
Assignee:
SHENZHEN NADE OPTICAL CO LTD (CN)
International Classes:
G02B27/01; G02B3/08; G02B25/00
Foreign References:
| CN105068250A | 2015-11-18 | |||
| CN106405817A | 2017-02-15 | |||
| CN101806956A | 2010-08-18 | |||
| CN109828368A | 2019-05-31 | |||
| CN105929545A | 2016-09-07 | |||
| US20030210468A1 | 2003-11-13 | |||
| CN106773008A | 2017-05-31 | |||
| CN213934399U | 2021-08-10 | |||
| CN112630977A | 2021-04-09 |
Attorney, Agent or Firm:
SHENZHEN DUOZHIHUI NEW INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)
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