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Title:
PROJECTION LENS
Document Type and Number:
WIPO Patent Application WO/2016/011801
Kind Code:
A1
Abstract:
A projection lens, comprising in sequence from the imaging side to the image source side thereof: a first lens (E1) having negative focal power, the imaging side thereof being convex, and the image source side thereof being concave; a reflective optical surface (E2) for bending the light path; a second lens (E3) having positive focal power, the image source side thereof being convex; a third lens (E4) having positive focal power, the imaging side thereof being convex, and the image source side thereof being concave; a fourth lens (E5) having positive focal power; and an optical diaphragm being arranged between the first lens (E1) and the second lens (E3); the projection lens satisfies the following relationship: 0.25

Inventors:
HUANG LIN (CN)
DAI FUJIAN (CN)
Application Number:
PCT/CN2015/072050
Publication Date:
January 28, 2016
Filing Date:
January 30, 2015
Export Citation:
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Assignee:
ZHEJIANG SUNNY OPTICS CO LTD (CN)
International Classes:
G02B13/18; G02B1/00; G02B13/00; G02B13/14
Domestic Patent References:
WO2013161995A12013-10-31
Foreign References:
CN104142565A2014-11-12
CN204009209U2014-12-10
CN103901586A2014-07-02
US20110141339A12011-06-16
JP2007093955A2007-04-12
KR100782477B12007-12-05
Other References:
See also references of EP 3026477A4
None
Attorney, Agent or Firm:
TSINGYIHUA INTELLECTUAL PROPERTY LLC (CN)
北京清亦华知识产权代理事务所（普通合伙） (CN)
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