Phase sensitive ultrasonic modulation method for the...

Details Phase sensitive ultrasonic modulation method for the... Phase sensitive ultrasonic modulation method for the...

G - Physics

01

N

73/55, 73/51.5

G01N 29/00 (2006.01) G01L 1/24 (2006.01)

Patent

CA 1227661

PHASE SENSITIVE[JLTRASONIC MODULATION METHOD FOR THE DETECTION OF STRAIN-SENSITIVE SPECTRAL FEATURES Abstract of the Disclosure A phase-sensitive ultrasonic modulation method for the detection of strain-sensitive spectral features involves the use of an ultrasonic field with well- defined wave fronts and a light beam of spot size less than the ultrasonic wavelength and of line width less than that of the spectral feature. When the light wavelength coincides with the wavelength of the spectral feature, the ultrasonic wave shifts, splits, or broadens the absorption line shapes of the various centers contributing to the spectral feature thereby changing the amplitude or phase of the light beam or emitted fluorescence in synchrony with the ultrasonic field.

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