Ultrasonic receiving apparatus and ultrasonic receiving method

Details Ultrasonic receiving apparatus and ultrasonic receiving method Ultrasonic receiving apparatus and ultrasonic receiving method

2006-05-23

2006-05-23

Jaworski, Francis J. (Department: 3737)

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

C356S479000, C073S603000, C359S001000

Reexamination Certificate

active

07048689

ABSTRACT:
To reduce the cost while maintaining the real time environment in receiving ultrasonic waves in an ultrasonic receiving apparatus which is capable of reducing changes in detection sensitivity due to environmental changes in the ultrasonic detecting element. The ultrasonic receiving apparatus comprises a light source for generating broadband light, an ultrasonic detecting element including an ultrasonic sensing portion that expands and contracts in response to a received ultrasonic wave and has optical reflectance that changes in accordance with expansion and contraction thereby performing intensity modulation on the light, spectrum-separating means for spectrum-separating the light, first photo-detecting means having a plurality of photoelectric conversion elements for detecting the light for plural wavelength components, and second photo-detecting means for detecting a selected wavelength component included in the light on the basis of a detection result of the first photo-detecting means.

REFERENCES:
patent: 6709393 (2004-03-01), Ogawa
patent: 6881189 (2005-04-01), Ogawa
Takahashi et al. Underwater Acoustic Sensor with Fiber Bragg Grating Optical Review vol. 4, No. 6 (1997) pp. 691-694.
Uno et al. Fabrication and Performance of a Fiber Optic Micro-Probe for Megahertz Ultrasonic Field Measurements T. IEE Japan, vol. 118-E, No. 11, (1998) pp. 487-492.
Beard et al. Transduction Mechanisms of the Fabry-Perot Polymer Film Sensing Concept for Wideband Ultrasound Detection pp. 1575-1583.

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