Title:
IMAGING LENS
Document Type and Number:
WIPO Patent Application WO/2019/019626
Kind Code:
A1
Abstract:
An imaging lens. The imaging lens comprises, from an object side to an image side along the optical axis, a first lens (L1), a second lens (L2), a third lens (L3), and a fourth lens (L4) in sequence. The object side surface of the first lens (L1) is a concave surface, and the image side surface of the fourth lens (L4) is a concave surface; the second lens (2) has positive focal power; at least one of the first lens (L1), the third lens (L3), and the fourth lens (L4) has negative focal power; the effective focal length f3 of the third lens (L3) and the effective focal lens f4 of the fourth lens (L4) satisfy f3/f4>0.
Inventors:
HUANG LIN (CN)
Application Number:
PCT/CN2018/077205
Publication Date:
January 31, 2019
Filing Date:
February 26, 2018
Export Citation:
Assignee:
ZHEJIANG SUNNY OPTICAL CO LTD (CN)
International Classes:
G02B13/00
Foreign References:
| CN107219610A | 2017-09-29 | |||
| CN206209180U | 2017-05-31 | |||
| CN201993515U | 2011-09-28 | |||
| CN106526804A | 2017-03-22 | |||
| CN202256845U | 2012-05-30 | |||
| US6977779B2 | 2005-12-20 | |||
| US20100208363A1 | 2010-08-19 |
Attorney, Agent or Firm:
INSIGHT INTELLECTUAL PROPERTY LIMITED (CN)
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