Optical sensors for detecting physical parameters

Details Optical sensors for detecting physical parameters Optical sensors for detecting physical parameters

G - Physics

01

N

73/53, 73/67, 34

G01N 21/84 (2006.01) G01D 5/26 (2006.01)

Patent

CA 1251057

ABSTRACT OPTICAL SENSORS FOR DETECTING PHYSICAL PARAMETERS To detect a physical parameter such as pressure, temperature, acceleration or force, the physical parameter is allowed to influence the movement of a light transmitting piezoelectric member. Light is supplied to the member and the member is vibrated in a direction transverse to the light transmitted in the member. The vibrations of the member are modulated by the physical parameter. The modulations of the vibrations modulate the light transmitted by the member. The modulations of the light transmitted by the member are then detected to detect the physical parameter. In some embodiments the physical parameter causes non- vibrational relative motion between two flexible light transmitting members. The change in the amount of light transmitted between the two members is detected for detecting the physical parameter.

481838

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