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Proceedings Paper

Temperature sensor based light reflection from a glass/liquid boundary
Author(s): Kim D. Bennett; P. J. Spero
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Paper Abstract

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.

Paper Details

Date Published: 25 October 1996
PDF: 12 pages
Proc. SPIE 2839, Fiber Optic and Laser Sensors XIV, (25 October 1996); doi: 10.1117/12.255353
Show Author Affiliations
Kim D. Bennett, Lafayette College (United States)
P. J. Spero, Lafayette College (United States)


Published in SPIE Proceedings Vol. 2839:
Fiber Optic and Laser Sensors XIV
Ramon P. DePaula; John W. Berthold, Editor(s)

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