Method and system for measuring the thermal diffusivity
US7364354B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2003 |
| Grant date | Apr 29, 2008 |
| Priority date | — |
| Expiry date | Jan 17, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K17/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention concerns a method and a system for measuring the thermal diffusivity. Said method comprises the steps of: subjecting a surface region of an object to a modulated heating beam (3) while providing a signal (MLS) thereof, the heated spot or area (4) of the surface of the sample (2) having a definitive diameter and a fixed intensity distribution profile; providing a signal (MTS) proportional to the temperature of the heated spot area (4); determining the phase difference between the modulated beam signal (MLS) and the resulting modulated temperature signal (MTS); and using said determined phase difference and the associated frequency to work out the thermal diffusivity value of said object (2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.