Optics: measuring and testing – By light interference – For dimensional measurement
Reexamination Certificate
2006-08-08
2006-08-08
Toatley, Jr., Gregory J. (Department: 2877)
Optics: measuring and testing
By light interference
For dimensional measurement
Reexamination Certificate
active
07088455
ABSTRACT:
Methods for measuring strains in biological and other samples include illuminating a specimen with substantially collimated laser flux. An electro-acoustic transducer is activated to generate acoustic waves in the specimen, including a surface wave component such as a Rayleigh wave. A series of laser speckle patterns produced by a laser flux scattered or reflected by the specimen is recorded and speckle pattern shifts are calculated based on the recorded speckle patterns. Phase shifts produced by acoustic wave propagation in the specimen are used to identify specimen regions associated with irregularities such as inclusions, cracks, or tissue abnormalities. In some examples, specimens are stretched or otherwise stressed by one or more light fluxes, and specimen elongation is estimated based on a series of associated speckle patterns.
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Duncan Donald D.
Kirkpatrick Sean J.
Klarquist & Sparkman, LLP
Lyons Michael A.
Providence Health Systems —Oregon
Toatley , Jr. Gregory J.
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