Optical waveguides – Optical fiber bundle – Transition between geometric shapes
Patent
1997-02-07
2000-11-07
Palmer, Phan T. H.
Optical waveguides
Optical fiber bundle
Transition between geometric shapes
385 13, 385 50, 385 38, 25722715, 25722714, 356345, G02B 600
Patent
active
061447900
ABSTRACT:
A fiber optic sensor is provided which is useful for detecting impact, pressure or other forces, and has particular application in detecting the presence of a foreign object in an electronically operated vehicle window including a motor, a frame and a window pane movable in the frame between an open and a closed position. The sensor comprises a fiber optic having one end connected to a light source, with the other end being connected to a detector. In the fiber optic, there is located a sensing portion fiber which is preferably located in the frame of the window so as to modulate light traveling in an optical path in the fibre optic in response to detection of the foreign object which comes into contact therewith. The sensor further comprises a signal propagating means for transmitting a signal to the motor when the optical path is modulated so as to stop or reverse the motor.
REFERENCES:
patent: 4682895 (1987-07-01), Costello
patent: 4843233 (1989-06-01), Jeunhomme
patent: 4882716 (1989-11-01), Lefevre et al.
patent: 5012088 (1991-04-01), Cole et al.
Abrahams Colin P.
Palmer Phan T. H.
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