Title:
OPTICAL PROJECTION SYSTEM AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/206784
Kind Code:
A1
Abstract:
Disclosed in the present application are an optical projection system and an electronic device. The optical projection system comprises, from the zoom-in side to the zoom-out side, a first lens group and a second lens group which are sequentially arranged along an optical axis, the second lens group having a positive focal power. The first lens group comprises a negative lens group and a positive lens group, the positive lens group being arranged closer to the zoom-out side than the negative lens group. The negative lens group comprises at least one lens having a negative focal power, and the positive lens group comprises at least one lens having a positive focal power, a first air gap being formed between the negative lens group and the positive lens group, and the first air gap being greater than 9.5 mm.
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Inventors:
ZHAO YUN (CN)
Application Number:
PCT/CN2022/102019
Publication Date:
November 02, 2023
Filing Date:
June 28, 2022
Export Citation:
Assignee:
GOERTEK OPTICAL TECH CO LTD (CN)
International Classes:
G02B15/14
Domestic Patent References:
| WO2013071676A1 | 2013-05-23 |
Foreign References:
| US20060176577A1 | 2006-08-10 | |||
| JP2011180602A | 2011-09-15 | |||
| CN112882208A | 2021-06-01 | |||
| JP2011069957A | 2011-04-07 | |||
| US20190056534A1 | 2019-02-21 |
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