Abstract
The authors have discussed in previous publications and a recent review [1] a number of the approaches which have been published in the literature on the design of fibre optic temperature sensors. There is considerable market potential for point sensors and the use of fluorescence-based techniques have been seen to be promising in both commericalized devices (e.g. Asea) and those only described in the literature so far [1]. However, in a recent report Harmer [2] indicates that some of the commercial devices do not appear to be as accurate under intensive testing as would be hoped from the manufacturer's data. Hence there is still a need to consider techniques which can lead to the production of an inexpensive and relatively accurate fluorescence-based point temperature sensor. In this work, such a system will be described and its basis upon fluorescence from ruby induced by light from an LED can lead to its potential development as a high temperature device (>200°C) due to the crystalline nature of the transducer material.
© 1988 Optical Society of America
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