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一、液晶光纤温度传感器的原理及结构某些胆甾型液晶混合物具有非常灵敏的“热色效应”。已经证明,当把一束白光投射到它表面上,从其表面反射回的最大光强所具有的波长λ_(max)与该液晶混合物的螺距成正比。还可以证明,随温度变化这类液晶混合物的螺距发生明显变化。这就是说,温度会导致胆甾型液晶混合物的λ_(max)发生相应位移。因为一般胆甾型液晶混合物的螺距为5000(?)左右,即处于可见光范围之内,因此其反
First, the principle and structure of liquid crystal optical fiber temperature sensor Some cholesteric liquid crystal mixture has a very sensitive “hot color effect.” It has been shown that when a beam of white light is projected onto its surface, the maximum light intensity reflected back from its surface has a wavelength λ max that is proportional to the pitch of the liquid crystal mixture. It can also be demonstrated that the pitch of such a liquid crystal mixture changes significantly with temperature. This means that the temperature will cause a corresponding shift in λ max of the cholesteric liquid crystal mixture. Because the pitch of the general cholesteric liquid crystal mixture is about 5000 (?), That is in the visible range, so the anti