Bending the fiber in one direction leads to a better transmission whereas bending in the other direction leads to a lower transmission, compared to the straight position.
Plastic optical fiber can also be used for seat-occupancy recognition
One approach for seat-occupancy recognition is the Kinotex cavity sensor from Canpolar East (St. John’s, NF, Canada).
Many consumers are probably aware of the use of tactile sensors that can stop a car window if an object is in the way. While many of these sensors are nonoptical, the evanescent field of an optical fiber can also be exploited in this application.