公开(公告)号：US20230137188A1

公开(公告)日：2023-05-04

申请号：US17802470

申请日：2021-02-26

Applicant: MASTER DYNAMIC LIMITED

Inventor： Yau Chuen YIU ,  Juan CHENG ,  Koon Chung HUI

IPC: G01R33/56 ,  G01R33/28

Abstract: A device(100a(i), 100a(ii), 100a(iii), 100a(iv), 200 for cis-tracing polarization of 12C isotope-based magnetic resource imaging contrast agents, comprising one or more diamond material structures(120(i), 120(ii), 120(iii), 120(iv), 210, 220) and one or more channels(105a(i), 105a (ii), 105a (iii), 105a (iv), 205) provided adjacent to the diamond material structures 120(i), 120(ii), 120(iii), 120(iv), 210, 220); the diamond material structures 120(i), 120(ii), 120(iii), 120(iv), 210, 220) provide a source of negatively charged nitrogen vacancy celles for polarization of a 13C iso-type-based magnetic measure imaging contrast agesi disguised in one or more channels(105a (i), 105a (ii), 105a (iii), 105a (iv), 205) and cis diamond material structure(120(i), 120(ii), 120(iii), 120(iv), 210, 220) provides a light guide for light for excitation of nitrogen vacancy celles for polarization of 13C isotope-based magnetic resource imaging contrast agent.

公开(公告)号：US20220355416A1

公开(公告)日：2022-11-10

申请号：US17624325

申请日：2020-07-24

Applicant: MASTER DYNAMIC LIMITED

Inventor： Yau Chuen YIU ,  Ka Wing CHENG ,  Koon Chung HUI

IPC: B23K26/359 ,  G06V20/80 ,  B23K26/0622 ,  B23K26/06 ,  B23K26/082 ,  B23K26/08

Abstract: A process of forming a non-optically detectable authentication marking (210,320, 410,535) in a diamond (200,300). Authentication marking (210,320,410,535) is formed adjacent the outer surface of an article formed from a diamond material having intrinsic optical centers. Method includes the step of applying an image of predesigned authentication marking(210,320,410,535) to a region (201,310,530) of a diamond (200,300) at or adjacent the surface of the diamond (200,300) by way of a direct laser writing; wherein the fluorescence background of the diamond material from intrinsic optical center is suppressed by authentication marking(210,320, 410, 535) under fluorescent imaging, such that the non-optically detectable identifiable authentication marking (210,320,410,535) is viewable against the fluorescence background at the region (201,310,530) of the diamond (200,300) where the authentication marking (210,320,410,535) is applied.

公开(公告)号：US20220274291A1

公开(公告)日：2022-09-01

申请号：US17624332

申请日：2020-07-24

Applicant: MASTER DYNAMIC LIMITED

Inventor： Yau Chuen YIU ,  Ka Wing CHENG ,  Koon Chung HUI

IPC: B28D5/04 ,  B42D25/435 ,  B42D25/324

Abstract: A process of forming a non-optically detectable authentication marking (110), includes the step of: applying a marking at a surface of a diamond (200) using a focused ion beam (FIB) writing process so as to provide a non-optically detectable authentication marking (110) which is formed by alteration in the optical characteristics of a portion of the diamond material at the outer surface of the diamond to form a marked portion; wherein the marking is optically invisible, and wherein the marking is viewable by an imaging method which provides an observable contrast between the portion of the diamond having altered optical characteristics and the non-marked portion of the diamond. The marking process can assist in the prevention of the counterfeiting of precious articles, and be of assistance in the incident of theft. A marking, a diamond, a process of viewing a marking on a diamond are further disclosed.

公开(公告)号：US20240383074A1

公开(公告)日：2024-11-21

申请号：US18417804

申请日：2024-01-19

Applicant: Master Dynamic Limited

Inventor： Yau Chuen YIU ,  Ka Wing Cheng ,  Koon Chung Hui

IPC: B23K26/359 ,  B23K26/06 ,  B23K26/0622 ,  B23K26/08 ,  B23K26/082 ,  G06V20/80

Abstract: A process of forming a non-optically detectable authentication marking (210,320, 410,535) in a diamond (200,300). Authentication marking (210,320,410,535) is formed adjacent the outer surface of an article formed from a diamond material having intrinsic optical centers. Method includes the step of applying an image of predesigned authentication marking (210,320,410,535) to a region (201,310,530) of a diamond (200,300) at or adjacent the surface of the diamond (200,300) by way of a direct laser writing; wherein the fluorescence background of the diamond material from intrinsic optical center is suppressed by authentication marking (210,320, 410, 535) under fluorescent imaging, such that the non-optically detectable identifiable authentication marking (210,320,410,535) is viewable against the fluorescence background at the region (201,310,530) of the diamond (200,300) where the authentication marking (210,320,410,535) is applied.

公开(公告)号：US20230168238A1

公开(公告)日：2023-06-01

申请号：US17919406

申请日：2021-04-16

Applicant: MASTER DYNAMIC LIMITED

Inventor： Yau Chuen YIU ,  Koon Chung HUI ,  Yan Yan MOK

IPC: G01N33/38 ,  G01N23/046 ,  G01N23/20025

CPC classification number: G01N33/381 ,  G01N23/046 ,  G01N23/20025

Abstract: A system (300) for providing a three-dimensional computer tomography image of a gemstone, the system (300) comprising an X-ray source (330) for providing an X-ray towards a gemstone (320); an X-ray detector system for detecting X-rays transmitted through or diffracted by the gemstone (320). The X-ray detector system surrounds the gemstone (320) and detects a three-dimensional multi-angle X-ray diffraction pattern from the gemstone (320) upon rotation of the gemstone (320) within the X-ray field, and provides an output signal therefrom, wherein the output signal provides for invasive three-dimension multiangle X-ray diffraction reconstructed computed tomography from the three-dimension multiangle X-ray diffraction pattern.