NEAR-INFRARED BANDPASS FILTER, PREPARATION METHOD THEREOF AND OPTICAL SENSING SYSTEM

WIPO Patent Application WO/2020/244222

A1

A near-infrared bandpass filter, a preparation method and an optical sensing system. The near-infrared bandpass filter comprises: a substrate (51), a primary film system (52) and a secondary film system (53), wherein the primary film system (52) is arranged on a first side of the substrate (51), the secondary film system (53) is arranged on a second side of the substrate (51), and the second side is opposite to the first side; the primary film system (52) comprises a high refractive index silicon germanium base film layer and a low refractive index film layer arranged according to a first preset stacking structure; the secondary film system (53) comprises a high refractive index silicon germanium base film layer and a low refractive index film layer arranged according to a second preset stacking structure; the adhesion force of the primary film system (52) and the secondary film system (53) to the substrate (51) is greater than or equal to 15MPa, and meets that the ISO level is less than or equal to 1 under the ISO2409-1992 standard.

CHEN CE (CN)
DING WEIHONG (CN)
FANG YEQING (CN)
YANG WEI (CN)
XIAO NIANGONG (CN)

PCT/CN2019/130576

December 10, 2020

December 31, 2019

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XIN YANG SUNNY OPTICS CO LTD (CN)

G02B5/20; C23C14/08; C23C14/10; C23C14/14; C23C14/24; C23C14/34

CN110058342A	2019-07-26
CN109655954A	2019-04-19
CN108873135A	2018-11-23
CN108761614A	2018-11-06
CN108897085A	2018-11-27
CN107841712A	2018-03-27
JPS61296306A	1986-12-27
JPH03210503A	1991-09-13

SEA INTELLECTUAL PROPERTY LAW FIRM (CN)

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