14 October 1987 A Simple Fiber Optic Thermal Switch Or Fire Alarm
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Proceedings Volume 0798, Fiber Optic Sensors II; (1987) https://doi.org/10.1117/12.941132
Event: Fourth International Symposium on Optical and Optoelectronic Applied Sciences and Engineering, 1987, The Hague, Netherlands
We describe a simple and inexpensive fiber optic thermal switch which gives an alarm if temperature exceeds a threshold determined by the material at the fiber end tip.The effect is based on the melting of suitable waxes where the back scattering of light vanishes when the critical threshold temperature is reached. The present device has many attractive features: it is uncomplicated, is based on a "solid state effect", is totally dielectric, and has an excellent long term stability.
© (1987) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. Luukkala, M. Luukkala, J. Viirto, J. Viirto, "A Simple Fiber Optic Thermal Switch Or Fire Alarm", Proc. SPIE 0798, Fiber Optic Sensors II, (14 October 1987); doi: 10.1117/12.941132; https://doi.org/10.1117/12.941132

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