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公开(公告)号：US11474078B2
公开(公告)日：2022-10-18
申请号：US16489339
申请日：2018-02-27
Applicant: Gemological Institute of America, Inc.
Inventor： George Wyatt Rhodes , Sally Catherine Magana
Abstract: The embodiments disclosed herein relate to the examination of gemstones including diamonds, both cut/polished and rough, using the technology of Resonant Ultrasound Spectroscopy. The resonant frequencies are obtained by mechanically causing the stone to vibrate using a swept sine oscillator, sensing the resonance vibrations, and displaying the spectrum to yield a pattern describing the stone. The resonance fingerprints can be used to both track an individual stone to verify its integrity or to grade a rough stone to establish potential value.
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公开(公告)号：US20220178827A1
公开(公告)日：2022-06-09
申请号：US17683874
申请日：2022-03-01
Applicant: Gemological Institute of America, Inc. (GIA)
Inventor： Hiroshi TAKAHASHI
Abstract: Provided herein is an apparatus for assessing a fluorescence characteristic of a gemstone. The apparatus comprises an optically opaque platform for supporting a gemstone to be assessed, one or more light source to provide uniform UV and non-UV illumination, an image capturing component, and a telecentric lens positioned to provide fluorescent images of the illuminated gemstone to the image capturing component. Also provided are methods of fluorescence analysis based on images collected using such an apparatus.
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公开(公告)号：US20220011290A1
公开(公告)日：2022-01-13
申请号：US17486815
申请日：2021-09-27
Applicant: Gemological Institute of America, Inc. (GIA)
Inventor： Lorne Loudin , Mehdi Toosi , Wuyi Wang
Abstract: Systems and methods here may be configured for cooling and examining materials. In some example embodiments, the system may include a main thermoconductive body with indentations on the top surface, a bottom surface having legs structures along the edge, wherein the bottom surface and the plurality of leg structures form a partially enclosed bottom chamber, and a center channel connecting the top surface and the bottom chamber.
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公开(公告)号：US11106648B2
公开(公告)日：2021-08-31
申请号：US16396603
申请日：2019-04-26
Applicant: GEMOLOGICAL INSTITUTE OF AMERICA, INC. (GIA)
Inventor： Marc Verboven , Troy Blodgett , Dirk Nuyts
Abstract: A method and system for generating a clarity grading look-up table includes collecting actual inclusion parameter data for a plurality of gems, where the actual inclusion parameter data includes an actual clarity grade and an actual inclusion parameter data combination. A mathematical relationship between a clarity grade and a particular inclusion parameter combination is then extrapolated from the actual inclusion parameter data. A derived clarity grade is then assigned to a plurality of inclusion parameter combinations as a function of the mathematical relationship and a set of inputted inclusion parameters. Also, a method and system for providing a clarity grade includes receiving a plurality of inclusion characteristics associated with a gem and parameterizing each of the inclusion characteristics, so that a parameter value is assigned to each inclusion characteristic. The parameter values are then input to a mathematical formula so as to provide a parameterized clarity grade for the gem.
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公开(公告)号：US20200096453A1
公开(公告)日：2020-03-26
申请号：US16697164
申请日：2019-11-26
Applicant: GEMOLOGICAL INSTITUTE OF AMERICA, INC. (GIA)
Inventor： Hiroshi TAKAHASHI
Abstract: Provided herein is an apparatus for assessing a color characteristic of a gemstone. The apparatus comprises an optically opaque platform for supporting a sample gemstone to be assessed, a daylight-approximating light source to provide uniform illumination to the gemstone, an image capturing component, and a telecentric lens positioned to provide an image of the illuminated gemstone to the image capturing component. Also provided are methods of color analysis based on images collected using such an apparatus.
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Patent Agency Ranking
公开(公告)号：US20200064267A1
公开(公告)日：2020-02-27
申请号：US16666375
申请日：2019-10-28
Applicant: GEMOLOGICAL INSTITUTE OF AMERICA INC. (GIA)
Inventor： Hiroshi TAKAHASHI
Abstract: Provided herein is an apparatus for assessing a fluorescence characteristic of a gemstone. The apparatus comprises an optically opaque platform for supporting a gemstone to be assessed, one or more light source to provide uniform UV and non-UV illumination, an image capturing component, and a telecentric lens positioned to provide fluorescent images of the illuminated gemstone to the image capturing component. Also provided are methods of fluorescence analysis based on images collected using such an apparatus.
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公开(公告)号：US10533951B2
公开(公告)日：2020-01-14
申请号：US15588389
申请日：2017-05-05
Applicant: GEMOLOGICAL INSTITUTE OF AMERICA INC. (GIA)
Inventor： Hiroshi Takahashi
Abstract: Provided herein is an apparatus for assessing a color characteristic of a gemstone. The apparatus comprises an optically opaque platform for supporting a sample gemstone to be assessed, a daylight-approximating light source to provide uniform illumination to the gemstone, an image capturing component, and a telecentric lens positioned to provide an image of the illuminated gemstone to the image capturing component. Also provided are methods of color analysis based on images collected using such an apparatus.
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公开(公告)号：US20190302060A1
公开(公告)日：2019-10-03
申请号：US16382178
申请日：2019-04-11
Applicant: GEMOLOGICAL INSTITUTE OF AMERICA, INC. (GIA)
Inventor： George Wyatt Rhodes
Abstract: Resonant Ultrasound Spectroscopy (RUS) is applied to diamonds (both cut/polished gemstones and rough diamonds) to yield a digital fingerprint from which the stone may be authenticated and sorted according to the structural quality. Diamonds are mined as rough stones from which they undergo examination to determine their value as being gem, or of two different industrial qualities. Fewer than 25% of mined diamonds are worthy of cutting and polishing to yield gems for jewelry. About 40% of the remaining population still have value as industrial diamonds for machine tools, and the rest is ground into dust to provide coatings for grinding applications. Rough stones exist in two conditions being coated and uncoated. The coated stones have a layer of polycrystalline diamond, different from the predominant crystal structure, rendering them opaque. This interferes with optical inspection, as any cracks, or inclusions can't be seen. RUS provides a reliable sorting and fingerprinting system for both cut/polished stones as well as rough diamonds of sufficient structural quality to yield a spectral signature. As high value items, diamonds are shipped around the world, and but sometimes thefts occur. RUS yields a digital fingerprint allowing the identity of an individual stone to be verified upon recovery.
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公开(公告)号：US20190137399A1
公开(公告)日：2019-05-09
申请号：US16133454
申请日：2018-09-17
Applicant: GEMOLOGICAL INSTITUTE OF AMERICA INC. (GIA)
Inventor： Hiroshi TAKAHASHI
Abstract: Provided herein is an apparatus for assessing a fluorescence characteristic of a gemstone. The apparatus comprises an optically opaque platform for supporting a gemstone to be assessed, one or more light source to provide uniform UV and non-UV illumination, an image capturing component, and a telecentric lens positioned to provide fluorescent images of the illuminated gemstone to the image capturing component. Also provided are methods of fluorescence analysis based on images collected using such an apparatus.
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公开(公告)号：US10275870B2
公开(公告)日：2019-04-30
申请号：US15918932
申请日：2018-03-12
Applicant: Gemological Institute of America, Inc. (GIA)
Inventor： Marc Verboven , Troy Blodgett , Dirk Nuyts
Abstract: A computer-based system and method for taking clarity measurements of a gem, and a computer-readable medium having computer-executable instructions, are provided and include receiving a pixilated image of a gem and identifying pixels representing an inclusion. The method and medium further include determining characteristics of the inclusion as a function of the pixels representing the inclusion, and providing a clarity grade based upon the determined characteristics. Also provided is a method for mapping a gem, and a computer-readable medium having computer-executable instructions, which include receiving a pixilated image of a gem having facet edges, and identifying pixels representing the facet edges. The method and medium further include generating a diagram of the gem, such that the diagram is a function of the pixels representing the facet edges, and superimposing the diagram onto the pixilated image.
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