The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 26, 2010
Filed:
Jan. 20, 2005
Charles A. Dimarzio, Cambridge, MA (US);
Ronald A. Roy, Mansfield, MA (US);
Todd W. Murray, Medford, MA (US);
Florian J. Blonigen, Jamaica Plain, MA (US);
Luis A. Nieva, Roslindale, MA (US);
Lei Sui, Brighton, MA (US);
Gopi Maguluri, Allston, MA (US);
Charles A. DiMarzio, Cambridge, MA (US);
Ronald A. Roy, Mansfield, MA (US);
Todd W. Murray, Medford, MA (US);
Florian J. Blonigen, Jamaica Plain, MA (US);
Luis A. Nieva, Roslindale, MA (US);
Lei Sui, Brighton, MA (US);
Gopi Maguluri, Allston, MA (US);
Northeastern University, Boston, MA (US);
Trustees of Boston University, Boston, MA (US);
Abstract
A system and method of detecting acousto-photonic emissions in optically turbid media that provide increased levels of detection sensitivity. The detection system includes an ultrasonic transducer, a laser, a photo-detector for detecting ultrasound-modulated laser light, and circuitry for processing the detected signals for subsequent analysis. The ultrasonic transducer generates an ultrasonic wave that propagates within an optically turbid medium. The laser generates a coherent light beam, which is split to form signal and reference beams. The signal beam is sent through the turbid medium, where it is phase modulated by the ultrasound. The ultrasound-modulated signal beam is provided to a photo-refractive crystal for subsequent interference with the reference beam to convert the phase modulation to intensity modulation. The DC offset of the signal beam intensity provides a measure of the magnitude of the mean phase shift induced by the ultrasound on the multiply scattered optical field within the turbid medium.