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Patent Searching and Data


Title:
COLOR TESTING METHOD USING STANDARD ILLUMINANT COLOR MATCHING BOX
Document Type and Number:
WIPO Patent Application WO/2017/147988
Kind Code:
A1
Abstract:
A color testing method using a standard illuminant color matching box, the method comprises: providing a halogen lamp (1) and a filter device (2) in the color matching box, wherein a light emitted from the halogen lamp passes through the filter device to form a main radiant light; providing a plurality of narrow band LED light sources (3) with different light emission wavelengths for emitting a supplemental light; the main radiant light and the supplemental light uniformly mixing in the color matching box to create a mixed light simulating a Standard Illuminant D; and using the mixed light to perform color testing of a test subject in the color matching box. After providing the supplemental light provided by the LED light sources with different light emission wavelengths, the quality of the illuminant meets a Category A Metamerism Index < 0.2 specified for CIE Standard Illuminant D, the quality being difficult to achieve using only a halogen lamp with a filter. The invention also improves light source stability, and does not experience changes to a relative spectral power distribution of a radiant light when using the illuminant. The invention further uses automatic monitoring to adjust the supplemental light to ensure that the relative spectral power distribution of the radiant light can satisfy a standard specification.

Inventors:
QIU JIAYI (CN)
LI CHANGJUN (CN)
LEI GUOLIN (CN)
SHI JIANDA (CN)
ZHAN YINGSHENG (CN)
Application Number:
PCT/CN2016/079514
Publication Date:
September 08, 2017
Filing Date:
April 15, 2016
Export Citation:
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Assignee:
WENZHOU JIAYI INSTR CO LTD (CN)
International Classes:
G01J3/10; G01J3/50
Foreign References:
CN104748848A2015-07-01
CN202814866U2013-03-20
CN104777106A2015-07-15
CN203705052U2014-07-09
US20120327405A12012-12-27
Other References:
See also references of EP 3376187A4
Attorney, Agent or Firm:
ZHEJIANG NAQI LAW FIRM (CN)
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