In a reflective fiber optic displacement sensor

the influence on intensity modulation property caused by the reflector shape was studied theoretically with the mathematic model found. The computer simulation was performed. Results show that with the radius of the convex reflector increasing

the starting distance of the sensor property curve will decrease

the front slope will change unobviously

while the linear range of the back slope enlarges

and its sensitivity decreases. When the radius of the concave reflector increases

the starting distance of the sensor property curve will decrease

the linear ranges of the front and back slopes become smaller while their sensitivities enhance.