Open AccessApplication of optical narrow-band mirrors in sensor of concentration of dust in coal mines
Author(s) -
Yu. А. Novikova,
M. B. Ryzhikov
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1889/4/042080
Subject(s) - interference (communication) , optics , radiation , coating , materials science , absorption (acoustics) , range (aeronautics) , coal dust , optoelectronics , environmental science , coal , remote sensing , computer science , physics , engineering , nanotechnology , telecommunications , geology , waste management , channel (broadcasting) , composite material
The article presents a new design of the sensor for measuring dust, which is based on the effect of absorption of optical radiation passing through the dust layer. Fundamentally new is the use of a powerful low-cost LED, the spectral part of the radiation range required for measurement of which is formed by the structure of auxiliary reflective optical interference filters. A technique based on the introduced stability criterion of the synthesized interference coating is developed, which makes it possible to study the transformation of the spectra with real errors in the film thicknesses.