Load cell and system for measuring forces based on optical spectra shifts
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United States of America Patent
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Oct 4, 2011
Grant Date -
Nov 19, 2009
app pub date -
May 12, 2009
filing date -
May 13, 2008
priority date (Note) -
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Abstract
A load cell having an optical micro-resonator in a housing formed of high thermally conductive material. Upon application of a force to a surface of the housing, the micro-resonator is squeezed and changes in shape and refractive index, thereby changing the resonant frequency of the micro-resonator and causing a shift in the spectrum of wavelengths of light that is introduced to the micro-resonator. This shift in the spectrum of wavelengths is representative of the force applied to the housing of the load cell.
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