| Issue |
EPJ Web Conf.
Volume 321, 2025
VII International Conference on Applied Physics, Information Technologies and Engineering (APITECH-VII-2025)
|
|
|---|---|---|
| Article Number | 03007 | |
| Number of page(s) | 6 | |
| Section | Quantum Physics, Optics, and Electromagnetic Phenomena | |
| DOI | https://doi.org/10.1051/epjconf/202532103007 | |
| Published online | 10 March 2025 | |
https://doi.org/10.1051/epjconf/202532103007
Three-band interference filters for open flame sensors
Saint Petersburg State University of Aerospace Instrumentation, 67, Bol’shaya Morskaya st., Saint-Petersburg, 190000, Russian Federation
* Corresponding author: adele1993@mail.ru
Published online: 10 March 2025
This paper describes a methodology of synthesizing of interference filters for open flame sensors for the absorption line of 4.4 μm. Its feature is the simultaneous use of reference lines at two wavelengths: 4 and 5 μm. In addition, the paper provides calculations of the transmission spectra of the interference filter at these wavelengths on a sapphire substrate, which blocks long-wave radiation above 6 μm. The use of such filters will increase the reliability of detection of open flames by sensors.
© The Authors, published by EDP Sciences, 2025
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