Difference between revisions of "OSAM"
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(New page: = O-SAM: Optical Scanning Acoustic Microscope = We have two O-SAM instruments (for historical reasons we call these the O-SAM and the ARRO-SAM). They each use a Q-switched mode locked las...) |
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* vector contrast imaging of Lamb waves (on thin samples) | * vector contrast imaging of Lamb waves (on thin samples) | ||
* thin film thickness measurement by change in SAW velocity | * thin film thickness measurement by change in SAW velocity | ||
| − | * SRAS (spatially resolved acoustic spectroscopy) | + | * [[SRAS]] (spatially resolved acoustic spectroscopy) |
* determination of inherent material nonlinearity | * determination of inherent material nonlinearity | ||
* aberration correction (adaptive acoustics, acoustic wavefront sensor) for "difficult materials" | * aberration correction (adaptive acoustics, acoustic wavefront sensor) for "difficult materials" | ||
This page will be updated with more information, but for now here's a link to a page about [http://optics.eee.nottingham.ac.uk/ultrasonic_microscopy.html ultrasonic microscopy] (a couple of years out of date). | This page will be updated with more information, but for now here's a link to a page about [http://optics.eee.nottingham.ac.uk/ultrasonic_microscopy.html ultrasonic microscopy] (a couple of years out of date). | ||
Latest revision as of 17:31, 25 September 2008
O-SAM: Optical Scanning Acoustic Microscope
We have two O-SAM instruments (for historical reasons we call these the O-SAM and the ARRO-SAM). They each use a Q-switched mode locked laser to excite surface acoustic waves (SAWs), which are then detected using a CW laser. Excitation frequencies used are 82MHz and harmonics thereof. A spatial light modulator controls the distribution of light from the excitation laser, affecting the acoustic field that we generate.
The O-SAMs can be used for a wide range of experiments:
- vector contrast imaging of Rayleigh waves
- vector contrast imaging of Lamb waves (on thin samples)
- thin film thickness measurement by change in SAW velocity
- SRAS (spatially resolved acoustic spectroscopy)
- determination of inherent material nonlinearity
- aberration correction (adaptive acoustics, acoustic wavefront sensor) for "difficult materials"
This page will be updated with more information, but for now here's a link to a page about ultrasonic microscopy (a couple of years out of date).
