| 摘要 |
A light pipe, a system and a method measure light attenuation from an optical fiber connected to a light source. The optical fiber transmits light from the light source to a light detector to determine a distance between the optical fiber and the light detector. The optical fiber attenuates light outwardly with respect to the fiber. A layer receives the optical fiber to reflect and/or to refract light transmitted by the optical fiber inwardly. A rod prevents light from attenuating from the optical fiber. A microprocessor may be connected to the light detector for determining the amount of light attenuated from the optical fiber. The microprocessor determines the distance between the light detector and the optical fiber based on the amount of light transmitted from the optical fiber to the light detector. The microprocessor transmits an output signal to a transducer for activating an arm to move an end of the layer inwardly or outwardly with respect to an end of the optical fiber. The light attenuated from the optical fiber and/or the light detectable by the light detector may correspond to a distance between the optical fiber and the light detector within an interior of the layer. The microprocessor may identify the distance between the optical fiber and the light detector based on the light measured and/or detected by the light detector from the optical fiber which may not be attenuated from the optical fiber.
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