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Patent Searching and Data


Title:
IRIS LENS
Document Type and Number:
WIPO Patent Application WO/2018/214397
Kind Code:
A1
Abstract:
Provided is an iris lens, having a total effective focal length f. From an object side to an imaging plane along the optical axis, the iris lens sequentially comprises a first lens (L1), a second lens (L2) and a third lens (L3). The first lens (L1) has a positive focal power, and the object side thereof is a convex surface. Both the second lens (L2) and the third lens (L3) have a positive focal power or a negative focal power. The distance TTL from the object side to the imaging plane of the first lens (L1) on the optical axis, and the total effective focal length f satisfy 0.7<TTL/f<1.1.

Inventors:
HUANG, Lin (No. 66-68 Shunyu Road, Yuyao Ningbo City, Zhejiang 0, 315400, CN)
Application Number:
CN2017/107846
Publication Date:
November 29, 2018
Filing Date:
October 26, 2017
Export Citation:
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Assignee:
ZHEJIANG SUNNY OPTICAL CO., LTD (No. 66-68 Shunyu Road, Yuyao Ningbo City, Zhejiang 0, 315400, CN)
International Classes:
G02B13/18
Foreign References:
CN201993515U2011-09-28
CN206788449U2017-12-22
CN106990512A2017-07-28
CN102269860A2011-12-07
CN102313971A2012-01-11
CN1749796A2006-03-22
US20050253952A12005-11-17
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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