Coating thickness measurement
US4818118A · kind A · utility
23Cited by
15References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1986 |
| Grant date | Apr 4, 1989 |
| Priority date | — |
| Expiry date | Nov 20, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/0658
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In the present invention, a discrete region of the TBC is heated, as by applying a controlled quantity of laser energy onto the region for a time interval. Then, the radiant thermal energy of a region outside the laser strike region is measured at a predetermined time following the termination of the laser pulse. The intensity of this measured radiant energy is then compared with the radiant intensities which have been experimentally obtained from known thickness specimens and the thickness is inferred therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.