The optical sensor for detecting NO2 and O3 using a white GaN LED

This article describes the scheme and principle of operation of an optical sensor for detecting nitrogen dioxide (NO2) and ozone (O3) based on the effect of optical absorption spectroscopy. A distinctive design feature of the proposed technical solution is that it is proposed to use an inexpensive p...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2021-02, Vol.1047 (1)
Main Authors: Novikova, Yu A, Ryzhikov, M B, Tereshchenko, G V
Format: Article
Language:English
Subjects:
Broadband
Coatings
Light emitting diodes
Multilayers
Nitrogen dioxide
Optical coatings
Optical measuring instruments
Optical radiation
Online Access:Get full text
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Summary:This article describes the scheme and principle of operation of an optical sensor for detecting nitrogen dioxide (NO2) and ozone (O3) based on the effect of optical absorption spectroscopy. A distinctive design feature of the proposed technical solution is that it is proposed to use an inexpensive powerful white led based on GaN as an optical radiation source, which has two relatively wide radiation peaks at wavelengths λ from 420 to 440 nm and λ from 525 to 650 nm. To separate the light streams and form separate measurement channels, three multilayer optical coatings were synthesized: a broadband beam-splitting coating and two narrow-band reflective coatings.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/1047/1/012065