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公开(公告)号：US20240102951A1
公开(公告)日：2024-03-28
申请号：US18533819
申请日：2023-12-08
发明人： Ka Wing Cheng , Yau Chuen Yiu , Kong Chan , Chun Hong Sham , Juan Cheng , Koon Chung Hui
CPC分类号： G01N24/10 , G01N33/381 , G01R33/323
摘要： A process for determining the type of a diamond having spin properties and physical properties, said process including the steps of: (i) determining the spin properties of a diamond of unknown type, using optically detected magnetic resonance to measure the spin properties of said diamond of an unknown type, wherein the spin properties are indicative of the physical properties of the diamond; (ii) comparing the spin properties of said unknown diamond with the spin properties of a plurality of diamonds of known types; and (iii) determining the type of said diamond of unknown type upon a predetermined threshold of correlation between the spin properties of said diamond of unknown type with the spin properties of a diamond of known type of said plurality of diamonds known types.
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公开(公告)号：US11835466B2
公开(公告)日：2023-12-05
申请号：US17328055
申请日：2021-05-24
发明人： Ka Wing Cheng , Kin Wing Wong , Kong Chan , Juan Cheng , Wing Chi Tang , Koon Chung Hui
IPC分类号： G01N21/87 , G06Q30/02 , G06T7/00 , G06Q30/0242
CPC分类号： G01N21/87 , G06Q30/0244 , G06T7/0004 , G06T2207/30108
摘要： A process operable using a computerized system (300) grades the clarity of a diamond (315, 400) as a function of internal defects within its body (315, 400). The computerized system (300) includes an optical image acquisition device (310), a processor module (320) and an output module (340) operably interconnected together. The process includes the steps of (i) acquiring via an optical image acquisition device (310) a plurality of top view images of a diamond (315, 400); (ii) in a processor module (320), detecting defects within the body of the diamond (315, 400); and (iii) from an output module (340), providing a signal indicative of the clarity grade assigned in (ii).
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公开(公告)号：US20240080964A1
公开(公告)日：2024-03-07
申请号：US18267132
申请日：2021-12-14
发明人： Yingnan WANG , Jianxing HUANG
IPC分类号： H05H1/46
CPC分类号： H05H1/46 , H05H2245/40
摘要： A method of forming an identifiable marking at an outer surface of a plurality of articles formed from a solid-state material, wherein each marking is formed from one or more recesses extending from the outer surface and into the article, said method including the steps of (i) providing at least a first mask having a first surface and a second surface and having a plurality of mask patterns, wherein each mask pattern is formed by one or more apertures extending through the mask from the first surface and to the second surface, and wherein the pattern is indicative of the shape of marking to be formed; (ii) affixing a plurality of articles formed from a solid-state material relative to the mask such that an outer surface of each article of the plurality of articles is affixed adjacent a mask pattern and adjacent the first surface of the mask; and (iii) applying a plasma etching process in a direction of from towards the second surface of the mask and towards the plurality of articles, wherein the outer surface of each article exposed to the plasma etching through the apertures in the mask has a marking formed thereon by one or more recesses etched by the plasma etching process.
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公开(公告)号：US20210033540A1
公开(公告)日：2021-02-04
申请号：US16942696
申请日：2020-07-29
发明人： Koon Chung Hui , Ka Wing Cheng , Wing Chi Tang
摘要： A process is operable using a computerized system for grading the clarity of a diamond. The computerized system includes an optical image acquisition device, a processor, a pre-trained neural network and an output module operably interconnected together. The process includes: (i) acquiring via an optical image acquisition device one or more plural axial view images of a diamond with different focus depths; (ii) in a processor, combining the plural axial views to form one or more single optical images; (iii) in a pre-trained neural network, providing a regressive value associated with the clarity grade of the diamond based on the one or more single images acquired during step (i); and (iv) from an output module, providing a clarity grade to the diamond (i) by correlating the regression value from (ii) to a clarity grade.
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公开(公告)号：US10762666B2
公开(公告)日：2020-09-01
申请号：US16237119
申请日：2018-12-31
发明人： Ka Wing Cheng , Kin Wing Wong , Kong Chan , Juan Cheng , Wing Chi Tang , Koon Chung Hui
摘要： A computerized system for grading the colour of a diamond, wherein the colour of the diamond is graded based on a predetermined threshold of correlation of colour of a diamond with the colour of a diamond of a plurality of diamonds each having a colour grading assigned thereto, the computerized system including: an optical image acquisition device for acquiring at least a first optical image of a diamond, wherein the first optical image is acquired at a predetermined angle of inclination to the central axis extending normal to the table and through the apex of the pavilion of the diamond and in a direction of towards the table and wherein the first optical image is acquired in an environment having a predetermined constant light level; a processor module for comparing data derived from acquisition of the at least a first optical image with a plurality of data sets each of which corresponds to a diamond of a plurality of diamonds, wherein data sets are each derived from an optical image acquired by an optical image acquisition device in an environment having a predetermined constant light the same as that as (i) and each of the data sets is assigned a colour grading, and wherein said data derived from acquisition of the at least a first optical image and the data of said data sets is data indicative of the colour of the diamond from which it is acquired; and an output module, for responsive to a predetermined threshold of correlation between the data derived from input of the first optical image and one of the plurality of data sets, providing an output signal indicative of the colour grade of the diamond.
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公开(公告)号：US11467101B2
公开(公告)日：2022-10-11
申请号：US17435643
申请日：2020-02-28
发明人： Ka Wing Cheng , Koon Chung Hui
IPC分类号： G01N21/958 , G01N21/88
摘要： A system (100) for viewing and ascertaining optical characteristics of gemstones, said system including a first and second integrating sphere (150,150a), wherein each integrating sphere (150,150a) is in optical communication with each other and having a spacer portion (116) disposed therebetween, a first light source (118) engaged with the first sphere (150) and for providing light to the interior of the first sphere (150) and a second light source (118a) engaged with the second sphere (150a) and for providing light to the interior of the second sphere (150a); at least one optical image acquisition device (110) in communication with the interior of one of the spheres for acquisition of an optical image of a gemstone disposed in a region between the spheres; a transparent platform (117) for supporting the gemstone between the two integrating spheres (150,150a); and a control module (120) in communication with the optical image acquisition device (110), for controlling the acquisition of optical images of gemstones thereof; wherein said optical image of the gemstone is processed by a processor to ascertain one or more optical characteristics of the gemstone.
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公开(公告)号：US20220276178A1
公开(公告)日：2022-09-01
申请号：US17633178
申请日：2020-08-05
发明人： Ka Wing CHENG , Yau Shuen YIU , Juan CHENG , Koon Chung HUI
摘要： A process for determining the type of a diamond, wherein the type of diamond is determined by the steps of (i) measuring the fluorescence lifetime characteristics of colour centres of a diamond of unknown type (110a); and (ii) determining the type of diamond by comparing the fluorescence lifetime characteristics measured at step (i) with the fluorescence lifetime characteristics of colour centres of known diamond types (120a), wherein the fluorescence lifetime characteristics of colour centres are indicative of the physical properties of a diamond, which are indicative of the type of a diamond.
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公开(公告)号：US20220268718A1
公开(公告)日：2022-08-25
申请号：US17633135
申请日：2020-08-05
发明人： Ka Wing CHENG , Yau YIU , Kong CHAN , Chun Hong SHAM , Juan CHENG , Koon Chung HUI
摘要： A process of determining the type of a diamond of unknown type, said process including the steps of (i) applying a laser input signal to a diamond of unknown type such the NV− centres or other C centres such that fluorescence is generated from said diamond; (ii) applying a magnetic field to said diamond and applying a variable microwave frequency to said diamond; (iii) acquiring the light intensity of fluorescence as a function of microwave frequency; and (iv) determining the type of the unknown diamond by comparing the light intensity of fluorescence as a function of microwave frequency of (iii) with light intensity versus microwave frequency characteristics diamond of known of a plurality of diamonds known types.
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公开(公告)号：US11326952B2
公开(公告)日：2022-05-10
申请号：US16942687
申请日：2020-07-29
发明人： Koon Chung Hui , Ka Wing Cheng , Wing Chi Tang
摘要： A process is operable using a computerized system for grading the colour of a diamond using a pre-trained neural network for determination of a colour grading. The computerized system includes an optical image acquisition device, a pre-trained neural network and an output module operably interconnected together via a communication link. The process includes: (i) acquiring via an optical image acquisition device one or more optical image of at least a portion of a diamond; and (ii) in a pre-trained neural network, providing a regressive value associated with the colour grade of the diamond.
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公开(公告)号：US20210364446A1
公开(公告)日：2021-11-25
申请号：US17328055
申请日：2021-05-24
发明人： Ka Wing CHENG , Kin Wing WONG , Kong CHAN , Juan CHENG , Wing Chi TANG , Koon Chung HUI
摘要： A process operable using a computerized system (300) grades the clarity of a diamond (315, 400) as a function of internal defects within its body (315, 400). The computerized system (300) includes an optical image acquisition device (310), a processor module (320) and an output module (340) operably interconnected together. The process includes the steps of (i) acquiring via an optical image acquisition device (310) a plurality of top view images of a diamond (315, 400); (ii) in a processor module (320), detecting defects within the body of the diamond (315, 400); and (iii) from an output module (340), providing a signal indicative of the clarity grade assigned in (ii).
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