| 摘要 |
An oxygen sensor using the principle of surface plasmon resonance, capable of measuring an oxygen concentration in a measurement chamber by detecting a change in resonance angle or refractive index using field enhancement effects, is provided. An oxygen transmission rate measurement system including the oxygen sensor is also provided. In this invention, only a change in voltage is measured at a fixed angle, thus achieving rapid measurement, and also, a single wavelength light source is used, thus reducing the size of the oxygen sensor and oxygen transmission rate measurement system. The oxygen sensor includes a laser diode for emitting light, a polarizer for converting the emitted light into polarized light, a prism for receiving the polarized light from the polarizer and having a sensor substrate provided on one surface thereof so that the polarized light is reflected, an oxygen concentration measurement chamber provided to enclose the sensor substrate so that oxygen a concentration of which is to be measured is contained therein, a photodiode for measuring the amount of light reflected from the prism, and a microcontroller unit for controlling operation of the oxygen sensor and calculating the oxygen concentration.
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