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US 2022/0152772 A1Published application
Automated diamond polishing methods and systems
AssigneeZalirian Ltd.
InventorOded BEN SHMUEL
Life of this patent
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Abstract
An automated gem polishing system comprising a computer-controlled polishing wheel; robotic apparatus, comprising multiple axis controllers and a gem holder; a digital microscope; and a computer having a processor and a memory, the memory including instructions that when executed by the processor implement the steps of registering and polishing a gem in the gem holder.
Claims23
An automated gem polishing system comprising:
- a computer-controlled polishing wheel;
- robotic apparatus, comprising multiple axis controllers and a gem holder;
- a digital microscope;
- and
- a computer having a processor and a memory, the memory including instructions that when executed by the processor implement the steps of registering and polishing a gem in the gem holder by:
- operating the robotic apparatus to move the gem to the field of view (FOV) of the digital microscope, to position the gem in multiple views with respect to the digital microscope, and to receive from the digital microscope multiple respective images of the gem;
- generating from the multiple respective images a current 3D model of the gem;
- registering coordinates of the current 3D model with a target 3D model of a finished gem;
- determining a current facet of the gem to polish in order to achieve the target 3D model;
- and
- operating the robotic apparatus to move the current facet into contact with the polishing wheel, and operating the polishing wheel to polish the current facet.
8 more elements
(canceled)
(canceled)
An automated gem polishing system comprising:
- a computer-controlled polishing wheel;
- robotic apparatus, comprising multiple axis controllers and a gem holder;
- a digital microscope;
- and
- a computer having a processor and a memory, the memory including instructions that when executed by the processor implement steps of controlling the polishing wheel, the robotic apparatus, and the digital microscope to determine a polishing orientation of a current facet of a gem mounted in the gem holder when a crystal structure of the gem is unknown, by:
- generating a set of crystal orientations with respect to a respective set of gem facets, each orientation defined by three orthogonal vectors a, b and c;
- calculating N easy polishing directions for each of the crystal orientations as projections of the vectors onto each facet in the set of gem facets;
- calculating an error sum S=Σ2N,i=1[(ϕobs,i−ϕcalc,i)], where N is the total number of easy polishing directions, ϕobs,i and ϕcalc,i are observed and calculated angles between these directions and the reference in the facet;
- choosing an easy polishing orientation for the current facet as the orientation giving the least error sum.
6 more elements
An automated gem polishing system comprising:
- a computer-controlled polishing wheel;
- robotic apparatus, comprising multiple axis controllers and a gem holder;
- a digital microscope;
- and
- a computer having a processor and a memory, the memory including instructions that when executed by the processor implement steps of selecting polishing parameters of a gem in the gem holder by:
- operating the robotic apparatus to move the gem to the field of view (FOV) of the digital microscope;
- receiving an image of a current facet from the digital microscope;
- processing the current facet image by an artifact recognition algorithm trained to recognize a set of surface artifacts correlated to a set of subsequent polishing parameters;
- identifying at least one artifact and determining a correlated set of polishing parameters;
- operating the robotic apparatus to move the current facet into contact with the polishing wheel, and operating the polishing wheel to polish the current facet according to the correlated set of polishing parameters.
7 more elements
(canceled)
Dependencies are inferred from the claim text.