摘要
讨论并建立了一种基于平行光束发射光强调制的光纤位移传感器 ,该传感器的入射和接收光纤的端部都用渐变折射率光纤 (GRIN)制成的透镜耦合。入射光纤的渐变折射率光纤透镜发出的平行光束以一定入射角照射到试件表面 ,接收渐变折射率光纤透镜放置在入射光的镜面反射方向。详细分析了试件表面为镜面反射和朗伯反射时传感器的输出特性 ,由仿真计算可知 ,通过调整测头的结构参量 ,该传感器可获得较强的输出信号 ,适用于对测量范围和工作点有灵活要求的场合。
A fiber optic displacement sensor based on the principle of collimated beam reflective intensity modulation is constructed. Both emitting fiber and receiving fiber are connected to graded-index (GRIN) lenses. The probe GRIN lens emits a collimated beam to illuminate a sample at an oblique incident angle. The receiving GRIN lens is then placed in the direction of specular reflection. Modulation functions are analysed for specularly reflective and Lambertian diffusive samples. Artificial calculation shows that the sensor has high signal level and flexibility in working distance and measurement range through adjusting the configuration parameters.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2003年第2期176-181,共6页
Acta Optica Sinica
基金
黑龙江省科学技术计划攻关项目资助课题。
