Measuring and testing – Vibration – By mechanical waves
Reexamination Certificate
2006-01-04
2009-12-01
Williams, Hezron (Department: 2856)
Measuring and testing
Vibration
By mechanical waves
C073S642000
Reexamination Certificate
active
07624640
ABSTRACT:
An opto-acoustic transducer assembly includes a substrate; at least one layer of opto-acoustic material coupled to a surface of the substrate, where the at least one layer of opto-acoustic material generates sound waves when struck by pulses of pump light; and an acoustic lens configured to focus sound waves generated by the at least one layer of opto-acoustic material towards a sample. The acoustic lens is further configured to collect sound waves returning from the sample and to direct the returning sound waves to the at least one layer of opto-acoustic material. The at least one layer of opto-acoustic material is responsive to the returning sound waves for having at least one optical property thereof changed, where the change is detectable from a change in a characteristic of reflected pulses of probe light that are time delayed with respect to the pulses of pump light.
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Maris Humphrey J.
Nurmikko Arto V
Brown University
Harrington & Smith PC
Miller Rose M
Williams Hezron
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