Title:
DOUBLE-FREE-FORM SURFACE LENS WITH UNIFORM COLOUR TEMPERATURE
Document Type and Number:
WIPO Patent Application WO/2019/015695
Kind Code:
A1
Abstract:
Provided is a double-free-form surface lens (1) with a uniform colour temperature, comprising an incidence free-form surface (101), an emergent free-form surface (102) and a side edge connection face (103), wherein the side edge connection face (103) is a side wall for connecting the incidence free-form surface (101) to the emergent free-form surface (102). The double-free-form surface lens is designed to influence the colour temperature after LED light distribution by using a single lens. The double-free-form surface lens is made of a transparent optical material, and the transparent material is PC, PMMA or optical glass. The double-free-form surface lens can control the light distribution angle, so that the colour temperature of obtained light spots is uniform.
Inventors:
WANG HONG (CN)
GE PENG (CN)
WANG XIANG (CN)
GE PENG (CN)
WANG XIANG (CN)
Application Number:
PCT/CN2018/100769
Publication Date:
January 24, 2019
Filing Date:
August 16, 2018
Export Citation:
Assignee:
ZHONGSHAN INSTITUTE OF MODERN INDUSTRIAL TECHNOLOGY SOUTH CHINA UNIV OF TECHNOLOGY (CN)
International Classes:
F21S41/25; F21V5/04; G02B27/00; F21W102/20
Foreign References:
| CN107191861A | 2017-09-22 | |||
| CN207962520U | 2018-10-12 | |||
| CN105589991A | 2016-05-18 | |||
| CN102606977A | 2012-07-25 | |||
| CN104317053A | 2015-01-28 | |||
| CN104566217A | 2015-04-29 | |||
| US6866408B1 | 2005-03-15 |
Attorney, Agent or Firm:
YOGO PATENT & TRADEMARK AGENCY LIMITED COMPANY (CN)
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