Abstract
Imaging with a variable wavelength photoacoustic (PA) microscope is a technique that permits the characterization of surface-improved materials, layered materials, etc. The authors present theoretical and experimental studies of the modulation frequency dependence and the image for a layered sample using a variable-wavelength PA microscope. The theoretical predictions are compared with experimental results on a PA signal as a function of modulation frequency for a layered polypropylene film when varying the wavelengths. Good agreement was obtained for varied wavelengths. Examples are presented of photoacoustic images obtained with the variable-wavelength PA microscope. These show a change of PA signal caused by the alteration of the layer which absorbs the incident light.
| Original language | English |
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| Pages (from-to) | 655-659 |
| Number of pages | 5 |
| Journal | Ultrasonics Symposium Proceedings |
| Volume | 2 |
| Publication status | Published - 1990 Dec 1 |
| Event | Proceedings of the IEEE 1990 Ultrasonics Symposium - Honolulu, HI, USA Duration: 1990 Dec 4 → 1990 Dec 7 |
ASJC Scopus subject areas
- Engineering(all)