Optical converting type ultrasonic receiving apparatus
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United States of America Patent
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Jan 10, 2006
Grant Date -
Nov 14, 2002
app pub date -
May 8, 2002
filing date -
May 14, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ultrasonic receiving apparatus is equipped with such a condition capable of obtaining superior sensitivities. This ultrasonic receiving apparatus includes: an ultrasonic detecting element for modulating light on the basis of ultrasonic waves applied thereto, the ultrasonic detecting element including an ultrasonic sensible portion having a length not larger than ¾ of a wavelength of ultrasonic waves propagated therethrough; and a photodetector for detecting light output from the ultrasonic detecting element.
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