Title:
OPTICAL IMAGING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/095710
Kind Code:
A1
Abstract:
Provided is an optical imaging system, comprising, in order from the object side to the image side along the optical axis: a first lens (E1), a second lens (E2), a third lens (E3), a fourth lens (E4), and a fifth lens (E5). The first lens (E1) has a positive focal power, an object side surface of the first lens (E1) is a convex surface, and an image side surface of said first lens is a concave surface; the second lens has a positive focal power; the third lens has a positive focal power or a negative focal power; the fourth lens has a negative focal power; the total effective focal length f of the optical imaging system and the entrance pupil diameter (EPD) of the optical imaging system satisfy f/EPD≤1.70.
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Inventors:
LYU SAIFENG (CN)
LYU FENGYE (CN)
LYU FENGYE (CN)
Application Number:
PCT/CN2018/095979
Publication Date:
May 23, 2019
Filing Date:
July 17, 2018
Export Citation:
Assignee:
ZHEJIANG SUNNY OPTICAL CO LTD (CN)
International Classes:
G02B13/00; G02B13/14; G02B13/18
Foreign References:
| CN107741628A | 2018-02-27 | |||
| CN207336909U | 2018-05-08 | |||
| CN107315236A | 2017-11-03 | |||
| CN206178233U | 2017-05-17 | |||
| US20080043343A1 | 2008-02-21 | |||
| US6744570B1 | 2004-06-01 |
Attorney, Agent or Firm:
INSIGHT INTELLECTUAL PROPERTY LIMITED (CN)
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