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25 October 1996 Temperature sensor based on light reflection from a glass/liquid boundary
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A temperature sensor is constructed in which light strikes the boundary between a glass (BK7) corner cube reflector and a small volume of liquid (water). The liquid is contained in a metallic housing, which is bonded to a test structure. As the structure changes temperature, the indices of refraction of both the liquid and the glass vary, and the amount of light reflected out of the corner cube changes. A full three-dimensional vector analysis of the corner cube sensor is presented in conjunction with the Fresnel equations and the refractive index temperature dependence of both BK7 and water. Experimental results show the sensor output to be roughly linear with temperature for the range between 30 and 90 degrees Celsius.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kim D. Bennett and P. J. Spero "Temperature sensor based on light reflection from a glass/liquid boundary", Proc. SPIE 2839, Fiber Optic and Laser Sensors XIV, (25 October 1996);


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