Patent ID: 11906437
Assignee: UNIVERSITà DEGLI STUDI DI MILANO - BICOCCA
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 2:
3. The apparatus of claim 2, wherein the central processing unit is further configured to:
if, as a result of the fourth analysis, the intensity peak at the wavelength of approximately 884 nm is determined to be absent, proceeding with verifying whether the gem emits a phosphorescence signal in a visible spectral region, wherein whether the gem emits the phosphorescence signal comprises:
deactivating the first light source and activating the second light source for a predetermined irradiation time, emitting the second primary beam toward the analysis position; and
at an end of the predetermined irradiation time, deactivating the second light source and, after a first time from deactivation, acquiring the phosphorescence signal from the second photodetector device;
if, as a result of this fifth analysis, phosphorescence intensity is determined to be greater than or equal to a phosphorescence intensity threshold value, establishing that the gem is a type II synthetic diamond and outputting an indication that the gem is a type II synthetic diamond; and
if, as a result of the fifth analysis, the phosphorescence intensity is determined to be less than the phosphorescence intensity threshold value, establishing that the gem is a type II natural diamond and outputting an indication that the gem is a type II natural diamond.