Title:
OPTICAL SENSING DEVICE HAVING FILTER STRUCTURE, AND EXPLOSIVE DETECTION SYSTEM INCLUDING SAME
Document Type and Number:
WIPO Patent Application WO/2020/141958
Kind Code:
A1
Abstract:
A light source unit emits a first light having a first wavelength range. A first filter filters the first light so as to output a second light having a first wavelength in the first wavelength range. A first mounting unit includes a light-emitting material for emitting, in response to the second light, a third light having a second wavelength range that differs from the first wavelength range. A second filter filters the third light on the basis of a first reference wavelength so as to output a fourth light having a third wavelength range, which is longer than or the same as the first reference wavelength in the second wavelength range. A third filter filters the fourth light on the basis of a second reference wavelength that differs from the first reference wavelength, so as to output a fifth light having a fourth wavelength range, which is shorter than or the same as the second reference wavelength in the third wavelength range. A light reception unit receives the fifth light. Whether explosive particles are present in the air is detected in response to the fourth wavelength range of the fifth light.
Inventors:
PARK IN CHANG (KR)
KIM JONG HYUN (KR)
KIM JONG HYUN (KR)
Application Number:
PCT/KR2020/000187
Publication Date:
July 09, 2020
Filing Date:
January 06, 2020
Export Citation:
Assignee:
ISENTECH CO LTD (KR)
International Classes:
G01V8/20; G01J1/04; G01N21/31; G01N33/22
Foreign References:
| KR20130134082A | 2013-12-10 | |||
| JP2017511487A | 2017-04-20 | |||
| KR200265011Y1 | 2002-02-20 | |||
| US20110177606A1 | 2011-07-21 | |||
| KR102030307B1 | 2019-10-08 |
Attorney, Agent or Firm:
KIM, Jeong Hoon (KR)
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