Method and means of rapidly distnguishing a simulated diamond from natural diamond
US4364677A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 3, 1981 |
| Grant date | Dec 21, 1982 |
| Priority date | — |
| Expiry date | Mar 3, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/389
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A simulated diamond such as crystalline cubic zirconia, which has optical properties very similar to natural diamond and so is difficult to distinguish optically from natural diamond, is distinguished from natural diamond by measuring its thermal conductivity which is significantly different from the thermal conductivity of natural diamond, by measuring the temperature of a heated probe held against the simulated diamond as an indication of the simulated diamond thermal conductivity. In a preferred embodiment of the present invention, a controlled amount of heat energy is generated at the probe and thereafter, while the probe is held against the simulated diamond, the temperature of the probe is detected as a measure of relative thermal conductivity of the simulated diamond to the natural diamond.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.