Measuring a sample

Details Measuring a sample Measuring a sample

2011-08-30

2011-08-30

Saint Surin, Jacques M (Department: 2856)

Measuring and testing

Vibration

By mechanical waves

C073S602000, C073S626000, C073S655000

Reexamination Certificate

active

08006558

ABSTRACT:
A sample10is measured by generating ultrasound at12, for example by using a laser22and spatial light modulator26. The ultrasound is detected at16, for example by optical beam deflection techniques. A characteristic of the generation at12is swept across a range of values to vary the efficiency of generation of ultrasound. The value of the characteristic, which corresponds with the peak amplitude detected at16, is identified to provide a measure of the acoustic velocity at the region12. The method is executed at a plurality of sites12, 20to provide a set of spatially resolved measurements of the sample10. This allows an image of the sample to be created.

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