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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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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：US20220026371A1
公开(公告)日：2022-01-27
申请号：US17312240
申请日：2019-12-10
发明人： Wing Yan LEE , Juan CHENG , Chun Yan Dominique LAU , Wing Chi TANG , Ka Wng CHENG , Ching Tom KONG , Koon Chung HUI
摘要： A process of assigning a colour grade to a diamond, including the steps of (i) determining the N3 and C-center content of a diamond (110); (ii) comparing the N3 and C-center content of the diamond with a previously acquired data set from a plurality of diamonds each having a colour grading previously assigned thereto, and (iii) assigning a colour grade to the diamond upon a correlation of the N3 and C-center content of said diamond with a grade of said previously acquired data set; wherein said previously acquired data set comprises a correlation between N3 and C center content and optical absorbance in the visible light spectrum for each diamond of said plurality of diamonds.
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公开(公告)号：US20210310950A1
公开(公告)日：2021-10-07
申请号：US17265088
申请日：2019-08-01
发明人： Juan CHENG , Chun Hong SHAM , Tat Hang CHUNG , Kong CHAN , Wing Chi TANG , Koon Chung HUI
摘要： A system (100a) for determining the type of a diamond (130a), the system (100a) comprising a plurality of lasers (110a,120a) for directing light towards a diamond (130a), wherein each laser is of a different wavelength of light; wherein the spectrum of light from the plurality of lasers (110a,120a) extends from ultra-violet to near infra-red; a spectrometer (140a) for collecting luminescence spectrum from the diamond (130a) responsive to inhomogeneities upon light from the lasers (110a,120a) being directed towards the diamond (130a); a processor module (150a) for comparing photoluminescence spectrum collected by the spectrometer (140a) with pre-existing photoluminescence spectrum of known diamond type; and an output module (160a) for providing an output signal indicative of the diamond type of the diamond (130a), upon a predetermined threshold of correlation between the photoluminescence spectrum from the diamond (130a) and the pre-existing photoluminescence spectrum from the diamond (130a) and the pre-existing photoluminescence spectrum responsive to inhomogeneities of known diamond type.
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公开(公告)号：US20200333257A1
公开(公告)日：2020-10-22
申请号：US16959115
申请日：2018-12-28
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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公开(公告)号：US20190213757A1
公开(公告)日：2019-07-11
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
IPC分类号： G06T7/90
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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