专利名称：ULTRASONIC SENSOR
发明人：CHAN, HELEN, LAI, WA,CHIANG, KIN, SENG申请号：EP91902647申请日：19910117公开号：EP0511268A4公开日：19931215
摘要：the ultrasonic sensor includes a polarization maintaining fiber (4) having twoorthogonal linear axes, and a sensor line (5). a laser source (1) directs a beam through aquarter wave plate (2) in order to provide a beam with circular polarization at the
entrance (3) of the fibre.the beam emerging from the outlet (8) of the fiber (4) is directedto a linear polarizer (9), and the intensity of the beam is detected by a photodetector(10). a signal processor (11) generates a control signal responsive to a display unit (12)for indicating the mode coupling in the fiber (4) is induced by incident ultrasonic waves.
申请人：COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANIZATION
地址：14 LIMESTONE AVENUE; CANBERRA, AUSTRALIAN CAPITAL TERRITORY 2601
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