The Spatial Modulation Characteristic of Optical Fiber Array for Linear and Angle Displacement Precision Measurement

A method used for precision displacement measurement of plane based on fiber sensor array spatial light intensity modulation is proposed. The effect of fiber radius, numerical aperture (NA) of fiber, space of fiber army, the linear displacement and angle displacement of the plane on the received spatial light intensity of fiber array was analysis. The simulation results shown that the spatial light intensity distribution of fiber array have very good sensitivity with the linear or angle displacement changes.