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Patent Searching and Data


Title:
PROJECTION LENS
Document Type and Number:
WIPO Patent Application WO/2019/210736
Kind Code:
A1
Abstract:
Provided is a projection lens. The projection lens comprises, from an imaging side to an image source side along an optical axis: a first lens (E1), a second lens (E2) and a third lens (E3). The first lens (E1) has a positive focal power; the second lens (E2) has a negative focal power, and a near imaging side surface thereof is a concave surface while a near image source side thereof is a convex surface; and the third lens (E3) has a positive focal power, and a near imaging side surface thereof is a convex surface. The total effective focal length f of the projection lens and the center thickness CT2 of the second lens (E2) on the optical axis satisfy 3.0 ≤ f/CT2 < 5.5.

Inventors:
YE, Lihui (No. 66-68 Shunyu Road, Yuyao Ningbo City, Zhejiang 0, 315400, CN)
LI, Ming (No. 66-68 Shunyu Road, Yuyao Ningbo City, Zhejiang 0, 315400, CN)
WENREN, Jianke (No. 66-68 Shunyu Road, Yuyao Ningbo City, Zhejiang 0, 315400, CN)
Application Number:
CN2019/076959
Publication Date:
November 07, 2019
Filing Date:
March 05, 2019
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:
G02B13/00; G02B13/06; G02B13/14
Foreign References:
CN108427183A2018-08-21
CN208297808U2018-12-28
CN201993515U2011-09-28
CN102621670A2012-08-01
CN107505689A2017-12-22
CN104391368A2015-03-04
CN101276038A2008-10-01
CN107092077A2017-08-25
CN101226271A2008-07-23
JP2014109741A2014-06-12
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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