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Patent Searching and Data


Title:
IMAGING LENS SET
Document Type and Number:
WIPO Patent Application WO/2018/218856
Kind Code:
A1
Abstract:
An imaging lens set, comprising in sequence from an object side to an imaging side along an optical axis a first lens group and a second lens group, wherein the first lens group has positive focal power and the second lens group has negative focal power. The first lens group comprises in sequence from the object side to the imaging side along the optical axis a first lens (E1), a second lens (E2) and a third lens (E3), wherein the first lens (E1) has positive focal power and the object side surface of the first lens (S1) is a convex surface; the second lens (E2) has negative focal power; and the third lens (E3) has positive focal power or negative focal power. The second lens group comprises in sequence from the object side to the imaging side along the optical axis a fourth lens (E4) and a fifth lens (E5), wherein the fourth lens (E4) has negative focal power and the fifth lens (E5) has positive focal power or negative focal power, and the object side surface of the fifth lens (S9) is a convex surface at a paraxial position. An effective focal length f of the imaging lens set and a combined focal length f45 of the fourth lens (E4) and the fifth lens (E5) satisfy: -1.0≤f/f45≤-0.5. With reasonable allocation of focal power and face type of various lens, and of an on-axis distance between every two lens, the imaging lens set can achieve good imaging quality on the premise of miniaturization.

Inventors:
LI, Ming (No.66-68 Shunyu Road, YuyaoNingbo, Zhejiang 0, 315400, CN)
ZHANG, Kaiyuan (No.66-68 Shunyu Road, YuyaoNingbo, Zhejiang 0, 315400, CN)
Application Number:
CN2017/107332
Publication Date:
December 06, 2018
Filing Date:
October 23, 2017
Export Citation:
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Assignee:
ZHEJIANG SUNNY OPTICAL CO., LTD (No. 66-68 Shunyu Road, YuyaoNingbo, Zhejiang 0, 315400, CN)
International Classes:
G02B13/00
Foreign References:
CN205229553U2016-05-11
CN107065142A2017-08-18
CN106680974A2017-05-17
CN105259636A2016-01-20
CN106646829A2017-05-10
US20040190158A12004-09-30
Attorney, Agent or Firm:
INSIGHT INTELLECTUAL PROPERTY LIMITED (19 A, Tower A InDo Building,No. 48A Zhichun Road, Haidian District, Beijing 8, 100098, CN)
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