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Method and Apparatus for Recording Acoustcmages and Holograms Background of the Invention
| Content Provider | Semantic Scholar |
|---|---|
| Author | Korkosz Pederson, Attorney-John J. |
| Copyright Year | 2017 |
| Abstract | The object or specimen is irradiated with acoustic waves to develop a field of acoustic vibrations in a reflective surface, and a flying spot laser scanner is provided to scan the surface with a collimated light beam. Variations in a reflection component of the light from the surface are mea sured to develop an output signal having frequency variations which correspond with acoustic intensity variations in the plane of the object surface. The output signal is heterodyned with a reference signal of a frequency bearing a predeter mined relationship to that of the irradiating acoustic waves, and the resulting intermodulation product is converted to a visual-type display to generate an acoustic hologram of the ob ject. A conventional nonholographic acoustic image is ob tained by amplitude detecting the output signal without reference signal mixing. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://patentimages.storage.googleapis.com/15/c3/ad/c7f1940c43bdb2/US3585848.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
