Patent ID: 11948039
Assignee: DIAMSAFE S.R.L.
Field: Control (Instruments)
Classification: CPC G  B | IPC G

Claim 11:
12. The system of claim 10, wherein said electromagnetic radiation is in the visible spectrum and the image acquisition means comprise:
an optical sensor or film;
an optical assembly comprising at least one lens assembly, wherein said at least one lens assembly is arranged at a first distance from said optical sensor or film and said optical assembly is arranged so that, when said optical assembly is in use, said optical assembly is at a second distance from said stone, said first distance and said second distance being adjustable;
a diaphragm with an adjustable opening between a first opening value and a second opening value, wherein said second opening value is greater than said first opening value,
and wherein:
a field depth of said image acquisition means depends on said first distance from said second distance and on an opening value of said diaphragm, and
each reference image is obtained with a predetermined field depth.