Title:
OPTICAL WAVEGUIDE, OPTICAL SYSTEM, AND OPTICAL GAS SENSOR
Document Type and Number:
WIPO Patent Application WO/2020/171244
Kind Code:
A1
Abstract:
The present invention relates to an optical waveguide, an optical system, and an optical gas sensor, wherein a parabolic reflector is disposed geometrically such that the optical waveguide is fabricated so as to have a small length, a small thickness, and a large optical path length, thereby improving the optical absorbance of gas molecules, and increasing the product productivity. A path expansion portion for expanding the optical path length (L) from a light source to an optical detector according to the present invention comprises: at least one nth path-expansion parabolic reflector disposed to have a predetermined angle with a first optical axis so as to reflect light that is incident in parallel with the first optical axis to a (m+2)th focal point; a bottom reflector having a (m+2)th focal point and configured to reflect light that is incident onto the (m+2)th focal point after being reflected by the nth path-expansion parabolic reflector; and at least one (n+1)th path-expansion parabolic reflector disposed to face the nth path-expansion parabolic reflector, to share the (m+2)th focal point, and to reflect light, which is incident after being reflected at the (m+2)th focal point of the bottom reflector, in a direction parallel with the first optical axis.
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Inventors:
PARK JEONGIK (KR)
Application Number:
PCT/KR2019/001920
Publication Date:
August 27, 2020
Filing Date:
February 18, 2019
Export Citation:
Assignee:
TRUEYES INC (KR)
International Classes:
G02B6/10; G01N21/3504; G01N21/37; G02B5/10
Domestic Patent References:
| WO2001067172A1 | 2001-09-13 |
Foreign References:
| KR20130081600A | 2013-07-17 | |||
| KR20180021956A | 2018-03-06 | |||
| KR100809915B1 | 2008-03-06 | |||
| US20020051303A1 | 2002-05-02 |
Attorney, Agent or Firm:
B&IP-JOOWON PATENT AND LAW FIRM (KR)
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