公开(公告)号：US20240310290A1

公开(公告)日：2024-09-19

申请号：US18677738

申请日：2024-05-29

Applicant: Gemological Institute of America, Inc. (GIA)

Inventor： Tsung-Han TSAI ,  Wuyi WANG

IPC: G01N21/87 ,  G01N21/64

CPC classification number: G01N21/87 ,  G01N21/6456

Abstract: Systems and methods here may be used for a setup of fluorescence image capturing of a gemstone, such as a diamond placed on a flat stage. Some examples utilize a setup that both sends light and captures the image from the table side of the gemstone by passing ultraviolet (UV) light between 10 nm and 400 nm to the gemstone and capturing the excited fluorescence image for analysis through a dichroic beam splitter. In some examples, the cutoff is 300 nm. The dichroic beam splitter arrangement allows for the camera to focus on the same interface of the stage and gemstone over and over for ease of use and without moving, changing, or adjusting the equipment for different samples.

公开(公告)号：US20240102937A1

公开(公告)日：2024-03-28

申请号：US18372026

申请日：2023-09-22

Applicant: Gemological Institute of America, Inc. (GIA)

Inventor： Tsung-Han TSAI ,  Hiroshi TAKAHASHI ,  Mehdi TOOSI ,  Yong LIU

IPC: G01N21/88 ,  G01N21/958 ,  G06T7/00 ,  H04N23/95

CPC classification number: G01N21/8806 ,  G01N21/8851 ,  G01N21/958 ,  G06T7/0002 ,  H04N23/95 ,  G01N2021/8812 ,  G01N2021/8822 ,  G01N2021/8867 ,  G01N2201/0633 ,  G01N2201/0634 ,  G01N2201/105 ,  G01N2201/126 ,  G01N2201/127

Abstract: Systems and methods here may be used for a setup of image capturing of a gemstone, such as a diamonds that are of high clarity grades. The present embodiments can provide methods to capture a diamond surface and internal clarity features from a diamond table and through and of other facets. Systems and methods may be used to convert gemstone dimension information into azimuth, slope, and distance information and adjust the motorized stage accordingly for surface imaging. Further, a calibration method can consider the offsets between design and actual system alignment. A calibration process can be used to compensate the offsets. Further, an additional conversion can be derived to compensate the offset caused by the geometry of the gemstone. The methods can automatically capture surface reflection images on facets of the gemstone and internal features taken through facets of the gemstone.

公开(公告)号：US20230243758A1

公开(公告)日：2023-08-03

申请号：US18104224

申请日：2023-01-31

Applicant: Gemological Institute of America, Inc. (GIA)

Inventor： Tsung-Han TSAI ,  Hiroshi TAKAHASHI ,  Mehdi TOOSI ,  Muhammed BAGDIGEN

IPC: G01N21/87 ,  G01N21/17

CPC classification number: G01N21/87 ,  G01N21/17 ,  G01N2021/1765 ,  G01N2201/025 ,  G01N2201/12723

Abstract: Systems and methods here may be used for automated alignment and focus adjustment for one or multiple sample gemstones on a stage, including determining gemstone sample tilt based on image data, automatically moving a stage to align the tilted sample, determining a focal plane that overlaps a focal point of a camera with the gemstone, and automatically moving a stage to the focal plane.

公开(公告)号：US20230083053A1

公开(公告)日：2023-03-16

申请号：US17943136

申请日：2022-09-12

Applicant: Gemological Institute of America, Inc. (GIA)

Inventor： Zhen WANG ,  Benjamin VALLIANT ,  Hiroshi TAKAHASHI ,  Mehdi TOOSI

IPC: B23K26/03 ,  B23K26/08 ,  B23K26/359

Abstract: Systems and methods here may be used for a laser inscriber or engraver of a gemstone using software feedback loops and multiple cameras to auto focus the system and automate the inscription.

公开(公告)号：US11499920B2

公开(公告)日：2022-11-15

申请号：US17200706

申请日：2021-03-12

Applicant: Gemological Institute of America, Inc. (GIA)

Inventor： Tsung-Han Tsai ,  Hiroshi Takahashi

IPC: G01J3/44 ,  G01N21/87 ,  G01N21/65 ,  G01J3/28

Abstract: Systems and methods here may be used for automated capturing and analyzing spectrometer data of multiple sample gemstones on a stage, including mapping digital camera image data of samples, applying a Raman Probe to a first sample gemstone under evaluation on the stage, receiving spectrometer data of the sample gemstone from the probe, automatically moving the stage to a second sample, using the image data, and analyzing the other samples.

公开(公告)号：US11346788B2

公开(公告)日：2022-05-31

申请号：US17105065

申请日：2020-11-25

Applicant: Gemological Institute of America, Inc. (GIA)

Inventor： Tsung-Han Tsai ,  Wuyi Wang

IPC: G01N21/87 ,  G01N21/64

Abstract: Systems and methods here may be used for a setup of fluorescence image capturing of a gemstone, such as a diamond placed on a flat stage. Some examples utilize a setup that both sends light and captures the image from the table side of the gemstone by passing ultraviolet (UV) light between 10 nm and 400 nm to the gemstone and capturing the excited fluorescence image for analysis through a dichroic beam splitter. In some examples, the cutoff is 300 nm. The dichroic beam splitter arrangement allows for the camera to focus on the same interface of the stage and gemstone over and over for ease of use and without moving, changing, or adjusting the equipment for different samples.

公开(公告)号：US20220034795A1

公开(公告)日：2022-02-03

申请号：US17382317

申请日：2021-07-21

Applicant: Gemological Institute of America, Inc. (GIA)

Inventor： Hiroshi TAKAHASHI ,  Pradeep N. PERERA

IPC: G01N21/33 ,  G01N21/64

Abstract: Systems and methods here may be used for capturing and analyzing spectrometer data of multiple sample gemstones on a stage, including mapping digital camera image data of samples, for both reflective and transmission modes.

公开(公告)号：US20220026351A1

公开(公告)日：2022-01-27

申请号：US17385895

申请日：2021-07-26

Applicant: Gemological Institute of America, Inc. (GIA)

Inventor： Jing ZENG ,  Hiroshi TAKAHASHI ,  Jon NEAL

IPC: G01N21/33 ,  F21V3/06 ,  G01N21/87

Abstract: Some examples herein include systems and methods of creating standards of gemstones of various classifications, which may display certain characteristics of the various classifications when excited by ultraviolet radiation and fluoresce in response. In some examples, a set of standards are created using fluorescent material, filters, and a radiation source to compare against a sample gemstone. In some examples, specific Light Emitting Diodes are selected to illuminate the gemstone samples under analysis.

公开(公告)号：US10890531B2

公开(公告)日：2021-01-12

申请号：US16666375

申请日：2019-10-28

Applicant: GEMOLOGICAL INSTITUTE OF AMERICA INC. (GIA)

Inventor： Hiroshi Takahashi

IPC: G01N21/00 ,  G01N21/64 ,  G01N33/38 ,  G01N21/87

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.

公开(公告)号：US10788460B2

公开(公告)日：2020-09-29

申请号：US16382178

申请日：2019-04-11

Applicant: GEMOLOGICAL INSTITUTE OF AMERICA, INC. (GIA)

Inventor： George Wyatt Rhodes

IPC: G01N29/12 ,  G01N29/24 ,  G01N29/46 ,  G01N29/44

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.