Material-testing method and apparatus
US4397556A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 22, 1980 |
| Grant date | Aug 9, 1983 |
| Priority date | — |
| Expiry date | Aug 22, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/65
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In materials-testing involving comparative examination of the surface of a particular material specimen, specimen surfaces are irradiated with monochromatic light and the Raman spectra of the specimen surfaces are recorded only for certain predetermined spectral regions, the spectral regions having been predetermined through prior recording of the Raman spectra of comparison bodies of different surface character, from which prior recording lines of the spectra which depend on surface character have been selected and classified in accordance with their characteristic properties; characteristic line properties for the specimen recordings are compared to those for the comparison-body recordings in order to make a determination of whether the specimen surfaces are of the acceptable quality represented by the comparison-body surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.